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Site Specific Seismic Analysis of Concrete Buildings for Khulna City

Mr Adil Ahmmed, Mr Prantik Chakraborty

Abstract


Earthquake resistant design is a very concerning issues. The Seismic Fragility analysis of structure is the indispensable part of the seismic risk assessment. Considering the large number of time history analyses for different Peak Ground Acceleration (PGA) is the most accurate method for estimating the seismic fragility of structure. The method is not computationally efficient. The underlying fact is time history analysis takes too much time and larger memory of computer. For this reason, this paper used two different approaches. The first approaches includes the indication of damage states by means of pushover analysis. After that nonlinear time history analysis is conducted. Then the probability of failure was calculated and lognormal distribution was done for estimating fragility curve. After that a developed algorithm SPO2FRAG is used to estimate fragility curve. The pushover curve and the dynamic properties of the structure are used in SPO2FRAG. The reason of using SPO2FRAG is to observe the accuracy of results. It was found that the algorithm has great accuracy for estimating fragility curve.

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References


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