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doi:10.3850/9789628014194_0023
Comparative Study on Dynamic Soil-Structure Interaction System with Nonliquefiable and Liquefiable Soil by Using Shaking Table Model Test
Peizhen Lia, Peng Zhao, Xilin Lu and Shenglong Cui
State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University,
1239 Siping Road, Shanghai, China.
alipeizh@tongji.edu.cn
ABSTRACT
Through comparing shaking table tests on the dynamic soil-structure interaction system with nonliquefiable soil (PS10H) and liquefiable soil (PS10L), the effects of various soils on SSI are studied. Test results indicate the liquefaction of soil can cause larger tilting and settlement of the superstructure, but it can also isolate the vibration. The frequency and damping ratio of the soil in test PS10L is larger than that in test PS10H, while the degeneration of the system frequency in test PS10H is larger than that in test PS10L. The mode shape of the superstructure under different excitations differs greatly in test PS10H, while differs little in test PS10L. The peak acceleration on foundation top is only a little smaller than that in free field in test PS10H, while it is obviously smaller in test PS10L. In the components of superstructure top acceleration response, the structural deformation takes a larger proportion, and each spectral component travels to low-frequency with increasing of input peak acceleration.
Keywords: Interaction, Liquefaction, Seismic response, Shaking table test, Soil-structure, Various soil.
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