Tag Archives: Dhaka

Journal / Seminar Paper

  • Air Pollution Aspects of Dhaka City – Author: Ahmmed, K. M. Tanvir and Begum, D. A

Abstract

This study is focused on the measurement of air pollution levels at traffic congestion and brick field. Indoor air pollution levels near to different types of cooker and in dwelling rooms have also assessed. It has been revealed that pollution level at traffic congestions has considerably improved due to large scale introduction of CNG vehicles in Dhaka city. Indoor pollution level assessment data show that cooks of Dhaka city are exposed to high concentration of CO, NO x and SOx. Some recommendations for air pollution control in Dhaka city are also incorporated in the paper.

Air Pollution Aspects of Dhaka City – Author: Ahmmed, K. M. Tanvir and Begum, D. A

  • Hidden Morphological Order in an Organic City – Author: Farida Nilufar

Abstract

Dhaka, the capital of Bangladesh, has grown from a small trading town to a metropolitan city. With the passage of time an organic morphological pattern has been spontaneously developing here without any rigid planning proposal. However, the spatial structure of organic cities like Dhaka is generally developed spontaneously in line with inhabitants’ aspirations. Within the apparent spatial disorder of the ‘natural city’, people must have a territorial need for sense of a place. Indeed, the mohallas, the historic neighborhoods in old Dhaka, had a territorial base, which revealed a social segregation symbolized by geographical definition. It is crucial to identify the essential components of present urban morphology in order to sustain the urban condition necessary for the continuation of our cultural milieu amid rapid urban transformation. This paper analyses the visible form of Dhaka to identify its different territorial units that have distinct social as well as spatial identity in the image of its inhabitants. Within the apparent morphological disorder in an organic city, Dhaka, a ‘tree’ like mental organization exists in cognitive image of inhabitants. This paper gives an evidence of a community at local level in Dhaka defined by the ‘territorial boundary’. These reflect inhabitants’ particular need for identity and sense of a place within the organic city .

For more details please follow the link below:

Hidden Morphological Order in an Organic City – Author: Farida Nilufar

  • Investigating the prospect of introducing traffic management measures in Dhaka city – Author: T. Khan, M.S. Hoque & A.S. Huq

Abstract

Traffic management is a vital tool for improving the roadway capacity. This study is intended to explore the prospect of introducing three most common traffic supply control management measures Tidal Flow, One-Way Operation and Signal Coordination in Dhaka city. The study is undertaken for Dhanmondi R/A bounded by Mirpur road, Satmosjid road, Dhanmondi Road# 2 and Road# 27. Volume surveys are conducted at the two end points with Mirpur road to find out the distinctive flow imbalance during the determined peak hour in the morning. The resulting directional flows are found to be 21%, 79% and 46%, 54% respectively leading to absence of tidal flow. Implementation requirements of other two regulations are also investigated. The pre-requisites are not met and the underlying reasons behind this failure are found in this study as the inherent weakness in the planning of road network and the consequent mixed type of land-use pattern.

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Investigating the prospect of introducing traffic management measures in Dhaka city – Author: T. Khan, M.S. Hoque & A.S. Huq

  • Land use change prediction in Dhaka city using GIS aided Markov chain modeling – Author:Md. Shahidul Islam, Raquib Ahmed

Abstract

The main objective of this paper is to evaluate the land use change in Dhaka City based on the need and purpose to predict future scenario of Dhaka City. Dhaka being a mega city has been challenged by numerous difficulties like unplanned urbanization, traffic congestion, water logging etc. Land use classification and analysis is performed using a GIS and Remote sensing technique, and GIS aided ‘Markov Cellular Automata’ technique is used to model the land use change. Based on the past trend (from 1991 to 2008) of land use changes, the future land use map of Dhaka city for the year of 2020 and 2050 has been generated. And collected maps and images were sorted and classified for analysis and interpretation. Landsat TM image of 1991 and Google image of 2008 were employed in this study to produce land use classification based on Anderson modified version method. IDRISI, Land Change Modeler (LCM) was used to analyze the land use/cover changes between various classes during the period 1991-2008. It is assumed that this kind of research will contribute to shaping the urban form of the city in a planned manner. So, that Dhaka can be a much more livable and planned city in near future.

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Land use change prediction in Dhaka city using GIS aided Markov chain modeling – Author:Md. Shahidul Islam, Raquib Ahmed

  • Morphological Change of Dhaka City Over a Period of 55 Years: A Case Study of Two Wards – Author: Bayes ahmed,Muhammad Rakibul Hasan Raj, Dr. K. M. Maniruzzaman

Abstract

Dhaka City has undergone radical changes in its physical form, not only by territorial expansion, but also through internal physical transformations over the last decades. These have created entirely new kinds of fabric. With these changes, the elements of urban form have changed. Plots and open spaces have been transformed into building areas, open squares into car parks, low land and water bodies into reclaimed built-up lands etc. This research has its general interest in the morphologic change of Dhaka City. It focuses on the spatial dynamics of urban growth of Dhaka over the last 55 years from 1952-2007. In the research, the transformation of urban form has been examined through space syntax. The aim behind using this technique is to describe aspects of relationships between the morphological structure of man-made environments and social structures and events. To conduct this research, Wards 49 and 72 of Dhaka City Corporation were selected as the study areas, of which Ward 72 is an indigenous and Ward 49 is a planned type of settlement. Being a planned residential area, the syntactic measures from this morphological analysis are showing quite unchanged and high values in all phases for Ward 49 and the physical characteristics of Ward 72 (Old Dhaka) still represent the past. The syntactic values are found to be higher for Ward 72 and than Ward 49. Higher values indicate that the street network is highly connective among each other. Time affects differently the layout of cities and the architecture of buildings. Of the many human creations, street systems are among the most resistant to change. This has been emphasized in this study, thereby facilitating the comparison of urban layouts across space and time. The interpretation of history in the light of quantitative accounts, as demonstrated in this study, will be of value to urban planners and urban designers
for the future planning of modern Dhaka City.

For more details please follow the link below:

Morphological Change of Dhaka City Over a Period of 55 Years: A Case Study of Two Wards – Author: Bayes ahmed,Muhammad Rakibul Hasan Raj, Dr. K. M. Maniruzzaman

  • PLANNING AND DEVELOPMENT OF DHAKA – A STORY OF 400 YEARS – Author: AHSANUL KABIR1 AND BRUNO PAROLIN

Abstract

This paper provides an overview of urban structure and the planning history of Dhaka. Human settlement in Dhaka can be traced back as far as the 12th century, but it was the Mughals who for strategic reasons established a town in the early seventeenth century. Since then the city has experienced an adventurous path under different rulers and has faced multifaceted challenges.
Starting as a military outpost, Dhaka has served as a business centre, trading hub, regional capital, provincial capital and now as the primate city of a nation with 16million inhabitants. While travelling through a political rollercoaster, the planning history of Dhaka is characterised by a variety of philosophical views all of which have left a spatial imprint on this historical city. The paper traces these different planning trajectories, examines their spatial impact and focuses on the current situation of Dhaka – one characterized by high densities and overcrowding, environmental degradation, severe traffic congestion and haphazard planning. Our analysis has a focus on growth and changes in urban structure over time. It particularly emphasises the spatial distribution of economic activities in Dhaka, and investigates the forces behind it. We also examine the role of different plans in accounting for the current form of the city. Geographical limitations appear to play a major role in the current urban pattern of Dhaka. There is wide heterogeneity in its urban form as different parts of Dhaka were developed over different centuries for different purposes. We investigate the harmony amongst different parts of the city to reveal dynamics among land uses and to present some guidelines for sustainable urban growth.

For more details please follow the link below:

PLANNING AND DEVELOPMENT OF DHAKA – A STORY OF 400 YEARS – Author: AHSANUL KABIR1 AND BRUNO PAROLIN

  • Possible Causes & Solutions of Traffic Jam and Their Impact on the Economy of Dhaka City – Aurhor: Khaled Mahmud, Khonika Gope & Syed Mustafizur Rahman Chowdhury

Abstract

Dhaka, capital of Bangladesh, is the most densely populated city in the whole world. More than twelve million people live in Dhaka city. Day by day the number is increasing and most part of Dhaka is badly affected by huge traffic jam. Faulty traffic signaling systems, inadequate manpower, narrow road spaces and overtaking tendency of drivers create pro-longed traffic congestions. Due to traffic jam a substantial portion of working hours have to be left on streets which indirectly put adverse impact on economy. It causes serious air pollution and noise pollution and thus worsens the overall environmental condition. To reduce traffic jam, government can consider construction of roads through east-west connection of Dhaka city, construction of circular embankment-cum-road along the periphery of Dhaka city, grade separated road network system, bus Rapid Transit (BRT) system, and Metro-Rail system. By reducing traffic jam, this city can play a very important role by ensuring healthy environment free from noise and pollution.

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Possible Causes & Solutions of Traffic Jam and Their Impact on the Economy of Dhaka City – Aurhor: Khaled Mahmud, Khonika Gope & Syed Mustafizur Rahman Chowdhury

  • TRANSFORMATION OF SPATIAL PATTERN AND DECLINING OF SOCIAL CAPITAL IN DHAKA CITY, BANGLADESH – Author: Sheikh Rubaiya Sultana Munni 

Abstract

In human settlement, there is a strong link between spatial quality and societal values. A space has two facts: physical phenomenon and a mental arena. Both of them are influenced by the social process (Sheikh, 2006). Nowadays in our country, we are experiencing rapid unplanned urbanization due to the pressure of huge population and globalization. In course of time urban areas are developed for business, education, and administrative purposes. People are coming to urban area for livelihood. To accommodate the huge population, there occurs lot of changes in their living space and pattern. Our traditional living space is being demolished. In the past, people lived in horizontal space but now people are living in a tight and congested area where the traditional space is not respected. The community space, interaction spaces are very rare there. So social bonding is being destroyed. They are living like a machine which is very much contrary to our culture (Sheikh, 2006). This trend is destroying our social capital. This paper aims to study how transformation of spatial pattern affects our living style and turns our social capital (focusing on community network, trust, dependency and cooperation) towards the declination. It also aims to give some recommendations to make this transformation of spatial pattern organized and planned to prevent the declination of our social capital.

For more details please follow the link below:

TRANSFORMATION OF SPATIAL PATTERN AND DECLINING OF SOCIAL CAPITAL IN DHAKA CITY, BANGLADESH – Author: Sheikh Rubaiya Sultana Munni

  • Transportation Problems of Dhaka City: Findings from an Opinion Survey

Over the last few years the transportation problem of Dhaka City has visibly been deteriorating steadily. Citizens constantly complain about the unbearable twin problems of traffic jam and air pollution. Democracy watch decided to address this problem through an opinion poll covering around eight hundred households randomly selected from several purposively selected neighborhoods of the city,  representatives of middle and lower income areas.

The questions asked focused mainly on three issues: (a) the nature of the problem as perceived by the surveyed residents, (b) their understanding about the causes of these problems and (c) their recommendations on solutions to these perceived problems.

Some preliminary results from this survey were presented at a workshop, which was participated by persons associated with the formulation and implementation of traffic policies, rules and programmes. This Draft Final Report benefits from valuable discussion and comments received at the workshop.

The methodology of this survey is explained below in brief. It is easy to see that the study extended beyond a standard opinion poll and entered the arena of investigative research in seeking some explanations to perceptions as well as behaviour.

The findings are presented mainly in the form of self-explanatory tables with some introductory highlights and conclusions.

A further extension of the survey is currently being completed to cover the very poor and the rich categories of residents as was recommended by several participants at the workshop mentioned earlier.

For more details please follow the link below:

Transportation Problems of Dhaka City: Findings from an Opinion Survey

  • Vehicle Mix and Road Space in Dhaka: The Current Situation and Future Scenarios – Author: Debra Efroymson, Mahabubul Bari

Traffic is an enormous problem in Dhaka, and important decisions need to be made about reducing traffic jams. While many officials and others blame rickshaws for Dhaka’s traffic problems, it is important to look at the actual situation on Dhaka’s roads, in terms of how many people are getting about and how much space they require to do so. Only through an analysis of our streets can we make sound decisions about traffic management. This paper looks at the percentage of passengers being moved by different modes, and the amount of road space those modes require. Analysis of number of passengers per mode, road space required, and other factors reveals that while rickshaws take a significant amount of road space, they also move a similar share of  passengers to the space they require, while cars take up a similar amount in order to move very few people. It is thus clear that it is private cars, not rickshaws, that are the main contributors to our traffic jams, and that while policies to reduce rickshaws will be of little effect, policies to reduce the use of private cars will greatly alleviate the traffic jams—benefiting current car drivers as well as all other road users. This paper also shows how a shift from private cars to public transport (buses) and non-motorized transport will result in a number of other significant benefits to our environment, economy, health, and society. While it is easy to blame all our traffic problems on the rickshaw, it is important to make our decisions based not on personal prejudices but on the facts. After all, allowing our policy to be based on biases towards elite groups will hurt not only the masses, but the very elite that were meant to benefit. How much wiser to develop policies that allow for freer movement of everyone, while also improving other aspects of our lives, health, environment and economy.

For more details please follow the link below:

Vehicle Mix and Road Space in Dhaka: The Current Situation and Future Scenarios – Author: Debra Efroymson, Mahabubul Bari

  • Violation of Land Use Plan and Its Impact Community Life in Dhaka City – Autor: Kasphia Nahrin

Abstract

Dhaka, the capital city of Bangladesh, is experiencing one of the highest rate of urbanization in the world. Over the years, the city has had inconsistent transformation of land use and organic development; which in turn created crisis in residential areas or neighborhoods and affected the city life adversely. Bureaucratic problems, political influence, lack of appropriate mechanism for land development for the residential areas, ineffective implementation, poor supervision and monitoring system are continuously creating the opportunity to alter or violate the land use plan. This defiance to follow land use plan of the city (particularly in the residential areas) creates  harmful  consequence  in  the  city   life  such  as   lack  of  social  cohesiveness  and  social security. Moreover, it creates  traffic congestion, inadequate provision of utility services, air pollution, noise pollution, overcrowding, lack of privacy, insufficient parking facility, lack of accessibility, frequent water logging and many other problems. Based on field observation and secondary information, this paper focuses on the issue of land use plan violation and its socioeconomic   impacts   in   Dhaka   City.

For more details please follow the link below:

Violation of Land Use Plan and Its Impact Community Life in Dhaka City –  Autor: Kasphia Nahrin

 

 

 

 

 

Journal/Seminar paper

  • Analytical investigation to the bending strength-deformation characteristics of the piers of Khilgaon Flyover in Dhaka -Author: M. A. Kader and M. M. Hoque
    Abstract

Bending strengths-deformation characteristics of the piers of Khilgaon have been investigated analytically by taking the non linearity of the material into consideration. The bottom most sections of the piers, the most critical sections in pier under bending, are used in the analysis. To achieve the goal, nonlinear sectional analyses of the reinforced concrete (RC) piers are carried out using fiber model of RC cross-sections. Moment-curvature relationships are found from the sectional analysis results. Yield moments, ultimate moments, and yield curvatures and ultimate curvatures are obtained from moment-curvature relationships. An elastic perfectly plastic model for reinforcing steel and a well recognized nonlinear constitutive model for concrete incorporating the effect of confinements has been used in the analysis. The effect of axial force on the moment strength has been investigated.

For more details please follow the link below:

Analytical investigation to the bending strength-deformation characteristics of the piers of Khilgaon Flyover in Dhaka -Author: M. A. Kader and M. M. Hoque

  • Basic geotechnical earthquake engineering –  Author: Dr. Kamalesh Kumar

Preface

Earthquake resistant geotechnical construction has become an important design aspect recently. This book BASIC GEOTECHNICAL EARTHQUAKE ENGINEERING is intended to be used as textbook for the beginners of the geotechnical earthquake engineering curriculum. Civil engineering undergraduate students as well as first year postgraduate students, who have taken basic undergraduate course on soil mechanics and foundation engineering, will find subject matter of the textbook familiar and interesting.

Emphasis has been given to the basics of geo-technical earthquake engineering as well as to the basics of earthquake resistant  geo-technical construction in the text book. At the end of each chapter home work problems have been given for practice. At appropriate places, solved numerical problems and exercise numerical problems have also been given to make the  subject matter clear. Subject matter of the textbook can be covered in a course of  one semester which is about of 4 to 4.5 months duration. List of references given at the end of
book enlists references which have been used to prepare this basic book on eotechnical earthquake engineering. Although the book is on geo-technical earthquake engineering, the last chapter of book is on earthquake resistant design of buildings,  considering its significance in the context of earthquake resistant construction. The ultimate judges of the book will be student, who will use the book to understand the basic concepts of geotechnical earthquake engineering. Suggestions to improve the usefulness of the book will be gratefully received.

For more details please follow the link below:

Basic geotechnical earthquake engineering –  Author: Dr. Kamalesh Kumar

  • Ground Improvement using Pre-loading with Prefabricated Vertical Drains – Author: Ashutosh Sutra Dhar, Abu Siddique, Syed Fakrul Ameen

Abstract

A container yard was constructed for handling of loaded containers at Chittagong Sea Port in Bangladesh covering an area of 60700 m2 over a sub-soil that included a layer of soft clayey silt/silty clay at depths of 0 to 3.5 m below grade. Thicknesses of the soft stratum varied from 3 m to 7 m. Ground improvement using pre-loading with prefabricated vertical drains was undertaken to pre-consolidate the compressible sub-soils, which was followed by field monitoring. It is revealed that the classical theories can effectively be used in calculating the consolidation settlement and the time for consolidation. Predicted settlements and the consolidation time matched reasonably with the measured values. To account for smear effects, the coefficient of consolidation and the coefficient of permeability were taken as those for vertical flow. Predictions with smear diameter equal to two times the equivalent drain diameter provided an upper bound of the consolidation time while prediction without consideration for smear effects provided a lower bound of the consolidation time for the container yard project.

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Ground Improvement using Pre-loading with Prefabricated Vertical Drains – Author: Ashutosh Sutra Dhar, Abu Siddique, Syed Fakrul Ameen

  • Inventory of life cycle CO2 emission of selected building materials of
    Bangladesh – Author: S. Khusru, M. A. Noor

Abstract

Bangladesh is a developing country. The construction sector of Bangladesh has seen massive boom in last few decades and is responsible for greenhouse gases contribution. The aim of the study is to develop inventory of life cycle CO2 emission equations for seven most widely used construction materials of Bangladesh namely brick, cement, sand, steel; both from billet and scrap, stone chips, timber and concrete. The system boundaries have been both cradle to gate and cradle to grave. Locally used units have been used in developing these empirical equations. The stages considered have been raw materials extraction, processing, transportation, construction of building, demolition and disposal. Operational CO2 emission of the building has not been taken into consideration. The developed equations will help the local civil engineers to assess and compare the environmental impact of building projects in different locations of Bangladesh and also help to identify sustainable building material for Bangladesh.

For more details please follow the link below:

Inventory of life cycle CO2 emission of selected building materials of
Bangladesh – Author: S. Khusru, M. A. Noor

  • People versus Power: The Geopolitics of Kaptai Dam in Bangladesh – Author: SAI LA PARVEEN & I. M. FAISAL

Abstract

This paper examines the impacts of the Kaptai dam, in the Chittagong Hill Tracts of Bangladesh, on the tribal communities of that area. Kaptai dam is the only hydro-power source in Bangladesh, with an installed capacity of 230 MW; about 5% of the electricity consumed in the country is produced there. When the dam was built in 1962, some 100 000 people were displaced and few of them received adequate compensation. Recently, the Power Development Board (PDB) of Bangladesh has announced a plan to install two new 50 MW units that will bring the capacity of the dam to 330 MW. This plan will cause the reservoir water level to rise and may take away about 7500 ha of the fringe land, which the tribal people use for rice cultivation during the April–August period each year. As before, the PDB has not discussed this plan with the potentially affected tribal groups, who are concerned about losing the fringe land and an important source of income. The paper discusses the original displacement issue and this recent development in the light of the geopolitical history of this region. It attempts to present an objective analysis o fthese issues and views held by various concerned parties. It then proposes a scheme for managing the Kaptai reservoir based on a participatory approach that will ensure both economic effŽciency and social equity.

For more details please follow the link below:

People versus Power: The Geopolitics of Kaptai Dam in Bangladesh – Author: SAI LA PARVEEN & I. M. FAISAL

  • PERFORMANCE OF BORED CAST-IN-SITU R.C.C. PILES IN BANGLADESH – Author: Md. Nwul Amin, Sabina Shahnaz

Abstract

The major part of Bangladesh is formed of young fluvio-deltaic sedimentary deposits, laid down by the mighty rivers Ganges and Brahmaputra. There are some older deposits in the hilly regions and Pleistocene terraces. The young fluvio-dcltaic deposits are composed of unconsolidated sediments, where the upper strata are very soft. The water table remains near to the surface throughout the year. As such construction ofdeep foundations has become essential for tall buildings, bridges and hydraulic structures. Bored Cast·in-Situ reinforced concrete pile is widely adopted as deep foundations. Jt is cost effective, time saving and the equipment and technology are readily available. This paper reviews and summarizes the performance ofBored Cast·in-Situ reinforced concrete piles in Bangladesh with special emphasis on present construction practice. T11is paper also evaluates the deficiencies in design and construction ofsuch piles and suggests remedial
measures for acceptable piles.

For more details please follow the link below:

PERFORMANCE OF BORED CAST-IN-SITU R.C.C. PILES IN BANGLADESH – Author: Md. Nwul Amin, Sabina Shahnaz

  • River Embankment and Bank Failure in  bangladesh: A Study on Geotechnical  Characteristics and Stability Analysis – Author: Md. Bellal Hossain, Toshinori Sakai, Md. Zakaria hossain

Abstract

This paper aimed to investigate the geotechnical properties of failed Jamuna river embankment material and Padma riverbank material of Bangladesh. Study results reveal that the soil of Jamuna river embankment is not well graded sand and the permeability is found moderately high which increases rapidly in submerge condition. The maximum strength is found low as embankment material. Moreover, the slope is not well protected that makes the embankment vulnerable to erosion. In case of riverbank failure, the permeability and strength of bank material both decreases rapidly with the increase of water content which associates the bank failure process. Nevertheless, the tension crack behind the bank face and toe erosion also accelerate the mass failure mechanism of the riverbank. The design methodology of embankment was evaluated by a case study. The study found that the factor of safety (FS) is over estimated of about 22-24% if seepage analysis is not considered in designing embankment.

For more details please follow the link below:

River Embankment and Bank Failure in Bangladesh: A Study on Geo-technical Characteristics and Stability Analysis – Author: Md. Bellal Hossain, Toshinori Sakai, Md. Zakaria hossain

  • Securing the Environment: Potentiality of Green Brick in Bangladesh – Author: Maksuda Hossain,Abu Md. Abdullah

Abstract

This paper presents the buzzing issue of green brick technology with the promises to protect the environment against the multidimensional damage done by traditional brick system. Bangladesh now facing a flourish in real estate sector that stimulates the brick industry too, but the very traditional brick making system destroys the diminishing  forest of this country intensifying the emission of carbon in the air polluting environment and endangering the life and livestock of the country. After presentingsuch facts regarding traditional brick system, the paper also examines the potentiality of green brick technology with details. Automated process, govt. support and extreme high demand with income through selling carbon credit are some promises of this green brick. The pollution of environment and ways to reduce this through this environment friendly brick making industry is the key concern ofthis research.

For more details please follow the link below:

Securing the Environment: Potentiality of Green Brick in Bangladesh – Author: Maksuda Hossain,Abu Md. Abdullah

  • Severity of Flood Embankments in Bangladesh and Its Remedial Approach – Author: Hossain, M.Z. and Sakai, T.

Abstract

Construction of earthen flood control embankments is an established practice in Bangladesh for protecting people’s lives and homes, agriculture and infrastructures. The paper reports the results of recent status of river and flood control embankments in Bangladesh based on the field visits to embankments site, collected data and information on failure and on-service embankments during field visits, necessary data related to embankments construction practice obtained from available publications and news paper information reported in the year 2007. It studies the basic features and characteristics of floods and flood hazards, and reviews the design & construction practices followed. Several cases of successful and unsuccessful river and flood control embankments are investigated and analyzed. Based on the results of analyses and discussion, it shows that the present method of embankments in Bangladesh, although requires huge amount of money for its construction and repair every year, fails to solve the flood problem effectively and permanently rather it brings many other new problems. It not only increases the siltration on the floodplains and river beds but also creates a risky situation for the inhabitants inside the boundary of embankments. On the basis of overall present situation in Bangladesh, the paper also suggests a proper design and construction method of embankments to control and minimize the extent of flood hazards in the long run.

For more details please follow the link below:

Severity of Flood Embankments in Bangladesh and Its Remedial Approach – Author: Hossain, M.Z. and Sakai, T.

  • SUSTAINABLE DEVELOPMENT OF CONCRETE TECHNOLOGY – Author: Dr. Tarek Uddin Mohammed

Abstract

This paper presents a summary of some recent research closely associated with the sustainable development of concrete technology in Bangladesh. The research projects include: (1) causes of deterioration of concrete structures in Bangladesh, (2) problems at construction sites that causes early deterioration of concrete structures in Bangladesh, (3) the quality of various cement brands commonly used in Bangladesh, (4) the properties of concrete made with various aggregates commonly used in Bangladesh, and (5) recycling of demolished concrete as coarse aggregate for new construction.

For more details please follow the link below:

SUSTAINABLE DEVELOPMENT OF CONCRETE TECHNOLOGY – Author: Dr. Tarek Uddin Mohammed

  • The effect of political unrest on construction time for food grain
    warehouses in Bangladesh

Abstract

The purpose of this study was to examine the factors that effect actual construction time in the context of food sector projects in Bangladesh. One of the factors of particular interest is political unrest. The data for the study was obtained from a leading design and construction management company in Bangladesh. The sample size consisted of data for 104 food grain warehouse projects scattered all over the country. The effect of political unrest on construction time was analyzed in conjunction with other known variables of time overrun, such as increase in project cost and delay in procurement of construction materials. The results indicated that the effect local political unrest on construction time was statistically significant even in the presence project cost and procurement of materials variables. It was concluded that political unrest could be included in prediction models used for finding out actual construction time of food grain warehouse projects in Bangladesh. Based on these findings, a prediction model for construction time for such projects was developed.

For more details please follow the link below:

The effect of political unrest on construction time for food grain warehouses in Bangladesh

  • The lateral strength and ductility of the piers of Khilgaon Flyover in
    Dhaka – Author: M.A. Kader & M.M. Hoque

Abstract

Lateral strengths of the piers of Khilgaon flyover have been evaluated analytically under bending, and shear mode of failure independently. The lateral strengths in bending are obtained using the results of nonlinear sectional analyses of the pier sections, while the shear strength of the piers are calculated using code defined equation taking into account the effect of depth, volumetric ratio of lateral steel, crushing strength of concrete, yield strength of steel. A fiber model of the pier sections at the critical positions are developed for obtaining M −φ relationships. Subsequently, nonlinear pushover analyses of the piers are carried out to obtain P − ∆ relationships. The material nonlinearity is taken into accounted for sectional analysis, while the material and geometric nonlinearity are considered for pushover analyses. In this study, ultimate capacities in bending and shear, yield and ultimate displacement, ultimate and allowable ductility are obtained from M −φ and P − ∆ relationships. Ductility are expressed in terms of both curvature and displacement ductility. Finally, the lateral strengths of the piers are presented in normalized form.

For more details please follow the link below:

The lateral strength and ductility of the piers of Khilgaon Flyover in Dhaka – Author: M.A. Kader & M.M. Hoque

Thesis/ Report

  • Updated Bangladesh National Building Code – BNBC (Part-4)

Bangladesh National Building Code (BNBC) was first drafted in 1993 but not formally reviewed and updated. Since then, major changes have taken place in every discipline of the Building technology. To make this code time worthy, Ministry of Housing and Public Works formed a steering committee with the responsibility of Updating BNBC 1993 by a G.O. having circular no. Section 8/IM-5/93(part) 812 (28) date:15.09.2008. The Housing and Building Research Institute (HBRI) has been entrusted with thetask of providing secretarial service to the steering committee and managing the implementation of the project. In response to the Request for Proposal (RFP) from HBRI,Bureau of Research, Testing and Consultation (BRTC) of Bangladesh University ofEngineering and Technology (BUET) submitted Technical and Financial proposals for updating the code. Consequently an agreement was signed between HBRI and BRTC on the15th of December, 2009 giving the task of updating the Code to BRTC, BUET. In this regard, An Inception Report to update the BNBC has already been approved by the concerned authority.

For more details please follow the link below:

Report with Recommendations for Updated BNBC Part 4

Editorial / Newspaper Article

Earthquake: A warning – The Daily Star

A magnitude­ 6.8 earthquake was felt across the country on September 1 8 evening, shaking buildings in the capital and elsewhere. Panic gripped common people. The US Geological Survey said on its website the quake was centered 64 km (40 miles) northwest of Gangtok, capital of northeastern state Sikkim and below 20 km of the surface.

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Earthquake: A warning – The Daily Star

Forecasting earthquake forces – The Daily Star

Stony Brook University researchers have devised a numerical model to help explain the linkage between earthquakes and the powerful forces that cause them, according to a research paper scheduled to be published in the journal Science on Feb. 1 7. Their findings hold implications for long­term forecasting of earthquakes.

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Forecasting earthquake forces – The Daily Star 

Fore shocks predict earthquakes! – The Daily Star

After a destructive earthquake, scientists sifting through the rumbles that preceded the big event often find fore shocks.

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Fore shocks predict earthquakes! – The Daily Star

Surviving the worst earthquake in living memoryReturning to Tokyo after nearly a year upon conclusion of my almost four years stint as Bangladesh Ambassador to Japan, in the last week of the wintry month of February, naturally made me feel very nostalgic.

The fateful day of March 1 1 broke at dawn with bright sunshine. It was a beautiful day with a clear blue sky and without any sign of bad weather, let alone a catastrophe.

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Surviving the worst earthquake in living memory

  • Bangladesh 6th ‘high-risk country – The Daily Star

A leading disaster watchdog has ranked Bangladesh as the world’s sixth “high disaster risk country” in terms of its exposure to typhoons, earthquake and tsunamis. he German-based United Nations University (UNU) Institute for Environment and Human Security (UNU-EHS) in its ‘World Risk Report-2011′ said Bangladesh ranked second in its risk index in Asia after the Philippines.

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Bangladesh 6th ‘high-risk country – The Daily Star

  • Earthquake preparedness in Bangladesh – The Daily Sun

The devastation that has been wrought recently by the massive earthquake in Japan should come as a grim but timely reminder to the authorities that Bangladesh, too, is vulnerable to earthquakes. The country lies on a major geological fault line and has suffered seven significant tremors in the 20th century alone. Food and Disaster Management Minister Abdur Razzaque’s emphasis on the need to enhance regional cooperation among South Asian countries to effectively tackle the challenge that is likely to emerge in the aftermath of a quake should be interpreted as a justifiable and time­befitting call. His call for regional cooperation in this regard came when he was inaugurating a four­day ‘First Regional Earthquake Response Seminar’ in the city on Monday.

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Earthquake preparedness in Bangladesh – The Daily Sun

  • Earthquake preparedness limping –  Financial Express

In December last, a moderate earthquake measuring 5.5 on the Richter scale jolted parts of the country including the capital. The quake was felt in Dhaka, Chittagong, Cox’s Bazar, Bandarban, Khagrachhari, Rangamati, Sylhet, Comilla, Gazipur and Brahmanbaria. No damage or loss of life was recorded in the incident.

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Earthquake preparedness limping –  Financial Express

  • Looming earthquake risk: How prepared are we? – The Daily Sun

Bangladesh is among the 20 most vulnerable countries to earthquake. According to experts, 65% area of Bangladesh is under the threat of extreme earthquake as Bangladesh is situated between three plate boundaries. One of these boundary lines is connected to the foothill of the Himalayas and is marked as the most dangerous source for severe earthquake. One CDMP study identified several active faults within Bangladesh based on historical events and evidence from geological investigations. In addition, inside the country and in the surrounding areas, there are numerous geographic scratches which are also the sources of earthquake. Among the scratches the most dangerous one is Rakhain Scratch, which is within 300 km of Chittagong, and the Madhupur and Dauki faults are
about 90 and 230 miles away from Dhaka respectively. Due to the geographical orientation, Dhaka, Chittagong, Sylhet, Mymensing, Rangpur and north­eastern extended areas of Bangladesh are under constant threat of earthquake.

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Looming earthquake risk: How prepared are we? – The Daily Sun

Newspaper Reference

 

  •  Tilted Demra building being demolished-the Daily Star

Owner of the three-storey residential building, that tilted early Monday in Demra on the outskirts of the capital, started demolishing it yesterday.
The building on Madrasah Road at Purba Hajinagar leaned on an adjoining six-storey building at midnight prompting Narayanganj district administration to evacuate immediately six families residing in the building.
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Tilted Demra building being demolished-the Daily Star

 

  • Savar Building Collapse : Germany to provide 2.5m Euros for job reintegration-The Daily Star

As a part of its long-term engagement in the garment sector of Bangladesh, the German government will provide 2.5 million Euros for a project giving job reintegration support to those who have become disabled in the collapse of the nine-storey Rana Plaza in Savar

For more details please follow the link below:

Savar Building Collapse : Germany to provide 2.5m Euros for job reintegration-The Daily Star

  •  Savar Building Collapse : Victims
    Indian, German govts offer rehab help -The Daily Star

The Indian and German governments yesterday offered assistance to rehabilitate the Savar building collapse victims to help the disabled persons regain their mobility, enabling them to lead a life in dignity and again work for their living.

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Savar Building Collapse : Victims Indian, German govts offer rehab help -The Daily Star

  • Stop use of residential buildings for industries-The Daily Star

Deadly building collapses may recur unless the government immediately identifies and stops the illegal use of residential buildings for readymade garments factories and other industries, leading civil engineers said at a discussion yesterday.

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Stop use of residential buildings for industries-The Daily Star

  • US wants rapid progress on building safety issue-The Daily Sun

DHAKA: US Secretary of State John Kerry has urged rapid progress both on fire and building safety inspection issues in Bangladesh and on quick passage of labour law amendments.

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US wants rapid progress on building safety issue-The Daily Sun

  • অভিজ্ঞতাকে কাজে লাগাতে হবে

সাভারের ভবনধসের ১৭ দিন পর একজনকে জীবিত উদ্ধার করার ঘটনাটি এক কথায় অসাধারণ। এটা আমাদের উদ্ধার-প্রক্রিয়ার একটি সফলতা হিসেবেই দেখতে হবে। অন্যদিকে মৃতের সংখ্যা হাজার অতিক্রম করাটাও খুব দুঃখজনক। মৃতের সংখ্যার বিবেচনায় এটা বিশ্বের সবচেয়ে ভয়াবহতম দুর্ঘটনা। আমাদের এখনই এমনভাবে কাজ শুরু করতে হবে, যাতে ভবিষ্যতে এ ধরনের দুর্ঘটনা আর না ঘটে। তবে দুর্ঘটনা যদি ঘটে যায়ও, তাহলে কীভাবে সবচেয়ে বেশিসংখ্যক মানুষকে নিরাপদে উদ্ধার করা যায়, তা নিয়ে নতুনভাবে চিন্তা করার আছে।

বিস্তারিত নীচের লিংকে

অভিজ্ঞতাকে কাজে লাগাতে হবে

  • বালু উত্তোলনে হুমকির মুখে বৃটিশ আমলের সেতু

ঠাকুরগাঁওয়ে নির্মাণাধীন জেলা সার্ভার স্টেশনের মাটি ভরাট করার জন্য শহরের টাংগন নদীর উপর শত বছরের পুরাতন লোহার ব্রীজের নিচ থেকে ড্রেজিং মেশিন দিয়ে বালু তোলা হচ্ছে। এতে হুমকির মুখে পড়েছে সেতুটি।

বিস্তারিত নীচের লিংকে

বালু উত্তোলনে হুমকির মুখে বৃটিশ আমলের সেতু