Seismic Performance of Hybrid Structures Subjected to Extreme Earthquakes

The present study aims to the evaluation of the effectiveness of hybrid building systems to resist extreme earthquake forces. The study is conducted by considering a five-storey building frame with different variants consisting of different types of primary structural members: steel, reinforced cement concrete, concrete-filled steel tube (CFST), and truss system. The seismic performance of five variants of building frames is evaluated under the effect of near-field earthquakes also referred to as extreme earthquakes by performing nonlinear time history analysis (NTHA). The results obtained are compared for different cases considering various seismic parameters of the building model. The performance of hybrid frames was evaluated in terms of inter-storey drift, top-storey displacement, top storey acceleration and base shear. The study concludes that hybrid building systems consisting of CFST columns and steel beams perform outbound as compared to the other variants with the decreased storey drift, and displacement and the hybrid structure consisting of RCC beam produced lower accelerations.