Analysis on Seismic-response of Different Stiffness Reinforced Concrete Frame Structure with Staircase

Four computer models of reinfored concrete frame structure with or without staircase were made,seismic-performance of the models were calculated by adopting spectrum analysis method based on ETABS.The results show that including staircase into models will change the story-stiffness distribution,vibration mode,shear-ratio of staircase-frame column of frame structure significantly,the effects are different depenning on the different stiffness of the original frame structure.The paper proposes that the stiffness of the original frame structure should be enhanced firstly in seismic design of reinfored concrete frame structure with staircase at present.