Abstract
This paper aims to study the effect of soil-structure interaction (SSI) on the seismic performance of reinforced concrete (RC) structures. The rubber-wood composite block was used to substitute the foundation soil, and the low-cycle reciprocating loading experiment of the RC frame substructure was performed. The damage process, component strain, yield mechanism, load-displacement performance, stiffness degradation, energy dissipation and foundation response were analyzed. The effect of SSI on the seismic behavior of the structure was investigated by altering the foundation coefficient in the reasonable non-linear analysis model. Finally, parametric studies were carried out. The results show that the seismic performance of the specimen is general, and the final failure is consistent with the typical disaster performance. Under the peak load, the soil reaction under an independent foundation reacts linearly. The SSI has a great disturbance on the yield displacement and yield mechanism. The longitudinal reinforcement ratio of the column makes it possible to monitor this disturbance. The axial compression ratio can make the yield mechanism perfect but has little effect on yield displacement. The effective flange width of the cast-in-place slab is estimated to be nearly 6 times the thickness considering the SSI.
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