Substructure shaking table test method based on amplification effect of rubber-mass system

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Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (19) : 109-115.

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Substructure shaking table test method based on amplification effect of rubber-mass system

CAI Xin-jiang 1,2 TIAN Shi-zhu 1,2, 3Wang Bin 1

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Abstract

When subjected to an strong earthquake, high-rise buildings’ top floor undergo large dynamic responses, which would have a great influence on equipment safety and human comfort. The research couldn’t be conducted by using a shaking table test directly for the reason of scale limitation. Firstly, a method for substructure shaking table test with rubber and mass system was introduced to reproduction dynamic responses of high-rise buildings top floor, and then a numerical simulation with a three degree of freedom performed by use of matlab, the curve of new earthquake input is preferably identical with the curve of old one, which confirmed the effectiveness of transfer function. At the last, the shaking table tests with a whole structure model and a substructure model under three different earthquakes were carried out, and the comparative research results show that the top floor acceleration responses both tend to be consistent, and the maximum value is almost the same, which proves the validity and applicability of rubber and mass system and transfer function for simulating the large dynamic acceleration responses of high-rise buildings’ top floor. This research can provide reference for high rise buildings seismic test.

Key words

high-rise building / shaking table test / substructure / rubber and mass system / amplification effect

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CAI Xin-jiang;TIAN Shi-zhu;Wang Bin . Substructure shaking table test method based on amplification effect of rubber-mass system [J]. Journal of Vibration and Shock, 2014, 33(19): 109-115