Reliability Evaluation of RC Frame by Two Major Fragility Analysis Methods

In the present study two popular approaches for the seismic fragility evaluation of RC buildings are considered. First approach is based on series of time history analysis and a power law representing probabilistic seismic demand model. Second approach is based on Incremental Dynamics Analysis to determine the median collapse intensity measure. The two methods are formulated with different assumptions and methodologies for evaluations. The fragility curves and reliability indices are developed for a typical four storeyed frame by both the approaches and a comparison study is performed. The both methods yield almost the same results at same total dispersions.