Residual Capacity of Reinforced Concrete Frame With and Without Steel Plate Shear Wall Under Sequence Earthquakes By Incremental Dynamic Analysis

Abstract The residual capacity of a damaged structure after the main earthquake is equal to the smallest spectral acceleration of the first mode, which causes local or general failure during the aftershock. In this research, the effect of seismic sequence on the residual capacity of reinforced concrete frame systems and a relatively new system of reinforced concrete frames eqquipped with steel plate shear wall has been investigated. Based on this, four system of 4, 8, 12 and 24 stories, which represent short, intermediate, tall, are modeled in finite element software and subject to three sets of of single and real seismic sequence, taking into account the damage, The effects of mainshock earthquakes have been analyzed under aftershock earthquakes nonlinear increment dynamic analysis. The analysis showed that in the real seismic sequence, the residual capacity of reinforced concrete frame with steel plate shear wall in short and intermediate structures on average 3 times and in tall structures up to 8 times compared to the residual capacity of reinforced concrete frame without steel plate shear wall. Also, in the real seismic sequence, the residual capacity of the structure decreased with increasing the height of short to intermediate structures and intermediate to tall structures, so that this capacity reduction decreased by an average of 65% in reinforced concrete frame with steel plate shear wall and 75% in reinforced concrete frame without steel plate shear wall.