Influence of span-length on seismic vulnerability of reinforced concrete buildings based on their fragility curves

This study discusses about the influence of span-length on seismic vulnerability of reinforced concrete buildings based on their fragility curve. Models are developed in a typical structural system with variation of span-length in one direction. Non-linear static pushover analysis is carried out to obtain seismic structural response. Damage states are defined according to drift and strength values upon analyzing the structural response. Fragility function is then used to develop curves that relate spectral displacements to the probability of reaching structural damage levels. Based on the obtained fragility curves, it can be concluded that span-length affect the probability of exceedance failure at extensive and complete damage state.