Experimental and numerical investigation on the dynamic response of a frame-core tube structure under the excitation of multi-direction seismic waves considering the soil-structure effect

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (10) : 206-214.

SHEN Chao,QIAN Deling,ZHU Zhipeng,YE Xiaoxiao,ZHANG Hengyuan

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Abstract

To investigate the dynamic response of a frame-core tube structure under the excitation of multi-direction seismic waves, with the consideration of soil-structure interaction (SSI) effect, shaking table tests were conducted on a SSI model and a fix-based (FB) model, with its superstructure of 20 floors frame-core tube construction.The differences of natural frequency, damping ratio, and mode shape between the SSI and FB models were analyzed under different conditions by the modal identification using the test data.The difference of dynamic responses of the SSI model in horizontal direction between the excitation of single horizontal direction and multi-direction seismic waves was analyzed by comparing the peak acceleration, maximum story displacement, maximum story drift, and maximum dynamic strain of the superstructure in horizontal direction under different seismic magnitudes.The influence of soil on the dynamic responses of the superstructure in vertical direction was analyzed by comparing the peak accelerations and story displacements in vertical direction of the SSI and FB models.Moreover, the test models were simulated by the finite element software (ANSYS) to verify the reliability of the test results.The study results could provide a reference to the study of the seismic performances of frame core tube high-rise buildings.

Key words

multi-direction seismic waves / dynamic interaction / shaking table test / dynamic response / numerical simulation

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SHEN Chao,QIAN Deling,ZHU Zhipeng,YE Xiaoxiao,ZHANG Hengyuan. Experimental and numerical investigation on the dynamic response of a frame-core tube structure under the excitation of multi-direction seismic waves considering the soil-structure effect[J]. Journal of Vibration and Shock, 2019, 38(10): 206-214

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