Assessment of an existing hospital building with concrete special moment frame using nonlinear static analysis and fragility curve
سال انتشار: 1396
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 630
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شناسه ملی سند علمی:
CASGC02_052
تاریخ نمایه سازی: 26 مرداد 1397
چکیده مقاله:
In this study, an existing hospital structure have 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 have been used for incremental dynamic analysis method via seism-struct software. In the next step, the probability of reaching or exceeding of the structure to a limit state was determined, and its 3- dimensional model was analyzed by the nonlinear static analysis (pushover) with the same performance level and two hazard levels. Results of incremental dynamic analysis for fragility curves show that PGA was 0.6g . the probability of reaching or exceeding from IO level is approximately 99% . This probability is almost 96% for LD. 82% for LS 53% for LLS, and 43% for CP.. It has been signified that the probability of fragility is raised with increasing in PGA. Results of the pushover analysis showed that at the hazard level one, the members of the structure are in the stage of the IO, and at the hazard level two, it reaches to CP level.
کلیدواژه ها:
fragility curve ، incremental dynamic analysis vulnerability
نویسندگان
Farhad Cheraghi
M.Sc. student, Islamic Azad University, Qazvin Branch, Department of Civil Engineering, Qazvin, Iran
Abdolreza S. Moghadam
Associate Professor, International Institute of Earthquake Engineering and Seismology, Department of Earthquake Engineering, Tehran, Iran