Assessment of an RC existing hospital building with special moment frame using fragility curve


1 Department of Civil Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran

2 Associate Professor, International Institute of Earthquake Engineering and Seismology, Department of Earthquake Engineering, Tehran, Iran


In this study, an existing hospital structure has been evaluated with incremental dynamic analysis (IDA). This building is accommodated in Karaj with soil type II. At first, two 2-D frames along X, Y direction are selected. Then, five performance levels are determined according to “Rehabilitation Code for Existing Buildings (Publication No. 360) including Immediate Operational (IO), Limited Damage (LD), Life Safety (LS), Limited Life Safety (LLS), and Collapse Prevention (CP). The Peak Ground Acceleration (PGA) as earthquake intensity and relative displacement (Drift) as the failure index has been used for incremental dynamic analysis method via seismo-struct software. In the next step, the probability of reaching or exceeding of the structure to a limit state was determined. Results of incremental dynamic analysis for fragility curves show that  the probability of reaching or exceeding from IO level is approximately . This probability is almost  for LD,   for LS,   for LLS, and  for CP. It has been signified that the probability of fragility is raised with increasing in PGA


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