Abstract:
This research presents the seismic fragility of a case study of a reinforced concrete building in Thailand from incremental dynamic analysis (IDA) results within the Performance-Based Earthquake Engineering (PBEE) framework. A vertically regular and symmetrical-in-plan reinforced concrete building with 8 stories and height of 28 meters is considered in this study. The building model also considers cyclic deterioration behavior. The response of structure is obtained by using OpenSees program with nonlinear response history analysis (NL-RHA) method. The seismic fragility curve is created from the IDA results by using the maximum likelihood method for estimation of parameters. The results for two sets of ground motions: (1) Large-Magnitude-Large-distance (LMLR) and (2) Large-Magnitude- Small-distance (LMSR) are compared. Both sets have earthquake magnitudes ranging from 6.6 to 6.9. LMSR has distances ranging from 15-30 km whereas LMLR has distances ranging from 30-60 km. It is found that the response, the dispersion of responses, and the probability of exceeding collapse prevention limit state at various intensity levels of LMSR results are larger than those of LMLR. If this building is located Chiangmai City, the probability of first yield in beam is 9.82%, first yield in column is 0.31%, and collapse is 0.027% during the 50 years lifetime period.