SEISMIC VULNERABILITY ASSESSMENT: A CASE STUDY OF CUET CAMPUS (original) (raw)
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A strong earthquake affecting a major urban area like Chittagong city may result in destructions of massive proportions and may have disastrous consequences for the entire nation. Chittagong, located in the south eastern part of Bangladesh, is a strategically and commercial capital of the country. The study area situated at no.25 Rampur ward of Chittagong City Corporation with more than 30,000 populations. The study methodology comprised of the most popular method of modern Turkish, where about eight individual parameters were surveyed like soft story, pounding effects, apparent quality etc. at level I survey. Based on the selected parameters, performance score has been assigned to individual buildings by which the buildings have been classified as damage category of safe, moderate and unsafe at level I survey. A total of 400 buildings have been surveyed in the study area of interest. Among those 400 buildings 179 buildings are safe, 39 buildings are unsafe and 182 buildings are of moderate category after level I survey. The important outcome of the study is the complete building inventory of the study area identifying the damage category.
A Study on Seismic Vulnerability Assessment of Existing Building in Chittagong City
International Conference on Engineering Research and Education School of Applied Sciences & Technology, 2019
The history of the earthquake occurrence over the last decade in Bangladesh makes the urban city most vulnerable in recent years. Even medium type earthquake on Richter scale resulted destructive scene in major cities of the country, particularly Dhaka, Sylhet and Chittagong. Among the cities in Bangladesh, Chittagong has been resulted in little resilience to earthquake as it is situated in Zone III where seismic coefficient value is 0.28. Considering this reality, this study has been carried out to develop a map describing the seismic vulnerability assessment characteristics of the existing building stock in West Bakalia ward among the 41wards in Chittagong city. To assess the building of the surveyed area two methodologies are used namely R.V.S (Rapid Visual Screening) suggested by FEMA-154 and TURKISH Method. Based on two methods, this paper calculated the seismic performance score of the existing RCC building whether the building is seismically safe or not. To calculate the seismic performance score of the existing RCC building some basic estimation variables like number of stories above the ground level, soft story index, pounding effect, topographic effect, existing of short columns, apparent building quality, local soil conditions, overhang ratio, minimum normalized lateral stiffness index, minimum normalized lateral strength index and normalized redundancy score have been considered.
A STUDY ON SEISMIC VULNERABILITY ASSESMENT OF EXISTING BUILDING IN CHITTAGONG CITY
International Conference on Engineering Research and Education School of Applied sciences & Technology., 2019
The history of the earthquake occurrence over the last decade in Bangladesh makes the urban city most vulnerable in recent years. Even medium type earthquake on Richter scale resulted destructive scene in major cities of the country, particularly Dhaka, Sylhet and Chittagong. Among the cities in Bangladesh, Chittagong has been resulted in little resilience to earthquake as it is situated in Zone III where seismic coefficient value is 0.28. Considering this reality, this study has been carried out to develop a map describing the seismic vulnerability assessment characteristics of the existing building stock in West Bakalia ward among the 41wards in Chittagong city. To assess the building of the surveyed area two methodologies are used namely R.V.S (Rapid Visual Screening) suggested by FEMA-154 and TURKISH Method. Based on two methods, this paper calculated the seismic performance score of the existing RCC building whether the building is seismically safe or not. To calculate the seismic performance score of the existing RCC building some basic estimation variables like number of stories above the ground level, soft story index, pounding effect, topographic effect, existing of short columns, apparent building quality, local soil conditions, overhang ratio, minimum normalized lateral stiffness index, minimum normalized lateral strength index and normalized redundancy score have been considered.
Structural Performance Investigation Based on Simple Assessment Procedure at CUET Campus
Bangladesh is situated in the seismically moderate risky zone due to its geographical location. Presences of exiting fault lines surroundings the country are capable to produce damageable earthquake. Frequently occuring light earthquakes in last couple of years make us aware about its future risk. In proposed Bangladesh National Building Code (BNBC) Second Edition seismic map, Chittagong city is quite subtancial to earthquake with a seismic zoning coefficient of 0.28. One of the leading technical universities of the country, Chittagong University of Engineering and Technology (CUET) campus is located about 27 km far from the heart of the Chittagong city center. This study was undertaken to prepare a structural database and to ivestigate the seismic safety of the structures by applying a two-level based simple assessment technique. Rapid screening procedure (RSP) was peformed in the first tire of assessment. Then Structural Inegrity Check was performed for the academic and administra...
Seismic vulnerability assessment and evaluation of high rise buildings in Islamabad
2012
Primarily the aim of this research is to carry out seismic evaluation study of buildings structures in Islamabad in order to propose basic guidelines and suggestions for Pakistan Code. Knowing the important nature of the subject, the earthquake based organizations are serious to compile a document for seismic threatened countries and areas. It is aimed that the document will work as a guideline source for the seismic evaluation, calculation and assessment of strength, behavior and expected performance and also the safety of already existing buildings. This study is based on review of already available documents on seismic vulnerability and evaluation of present buildings at different sites is carried out in order to know the key components of this very procedure so that it can be used in Pakistan and also in other developing countries as well. This would not only be robust, safe and reliable, but also can be convenient to use within the domain of available resources. ASCE 31-03 guid...
Seismic vulnerability assessment of buildings of Dhaka city
The objective of this study is to assess the seismic vulnerability of R.C.C. structures of the selected area by R.V.S (Rapid Visual Screening) method and The Turkish Method. The areas covered under the survey are Dhanmondi residential area, Lalmatia and the greater Mohammadpur. The survey was mainly focused on earthquake issues such as identifying building type, plot size and shape, clear distances from surrounding structures, road width and basic information of the building: type of foundation, slab type, year of construction, no. of storey, no. of inhabitants etc. The detail analysis (or the level-2 analysis) covered the determination of plinth area (length x width), column size and direction, lift core size, cantilever length of the building etc. Digital photographs of each building from at least two directions were taken. The developers' names concerned with each building are also recorded during the survey. The survey process was conducted between 15-03-07 to 28-05-07. A database was compiled in MS Access. It was found there are approximately 2007 structures in the above areas of them about 1082 buildings are R.C.C structures. About 456 of them are soft storied. The rest 925 buildings are unreinforced masonry (URM). In soft storied buildings, the ground floor is basically being used as parking space. It was also found that most of the buildings of the target areas were constructed without the development of proper disaster prevention system against potential earthquakes. Use of Rapid Visual Screening (RVS) on the study area enables to divide screened buildings into two categories: those that are expected to have acceptable seismic performance and those that may be seismically hazardous and should be further studied. For further analysis of the buildings the help of Turkish method and ETABS Software would be taken.
Proceedings of 3rd International Conference on Advances in Civil Engineering, 2016
Chittagong is the largest port city and commercial capital of Bangladesh which has many development activities as like of planned residential areas, but over the last 30 years the unchecked development in Chittagong has been resulted in little resilience to earthquake. So now-a-days it is very important to identify buildings that are high vulnerable. This paper represents the seismic vulnerability of RCC buildings of 8 no. Shulakbahar ward, Chittagong by using Turkish method based on a number of structural parameters like soft story, pounding effects, apparent quality etc. at level-I survey and two parameters like redundancy and strength index are also calculated at level-II survey that determined on the basis of engineering knowledge and observation. In this method, the discriminate scores obtained from two discriminate functions are combined in an optimal way to classify existing buildings as "safe"; "unsafe"; "moderate" from level-I survey and those moderate group buildings are further analyzed in Level-II survey and obtained the high risk and low risk group, moderate risk group.