基于橡胶垫-质量块系统放大效应的子结构振动台试验方法

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (19) : 109-115.

论文

基于橡胶垫-质量块系统放大效应的子结构振动台试验方法

蔡新江1,2，田石柱1,2，3王彬1

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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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文章历史 +

摘要

地震作用下高层建筑结构顶层的动力反应过大，会对设备的安全性及人的舒适度产生极大的影响，由于尺度的原因导致上述研究无法直接采用振动台进行试验。首先阐述了一种基于橡胶垫-质量块系统放大效应的子结构振动台试验方法；然后基于matlab进行了一个三自由度体系数值算例，新输入加速度曲线和原输入加速度曲线较为吻合，证实了地震动传递函数的有效性；最后通过小型振动台进行了三种不同地震作用下整体结构模型试验和子结构模型试验，对比后的研究结果表明：两者的顶层加速度反应曲线趋于一致，最大值几乎相同，从而验证了橡胶垫-质量块系统的放大效应和地震动传递函数对于模拟再现高层建筑结构顶层加速度反应的有效性和适用性，可为高层建筑结构抗震试验提供研究参考。

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.

导出引用

蔡新江;田石柱;王彬. 基于橡胶垫-质量块系统放大效应的子结构振动台试验方法[J]. 振动与冲击, 2014, 33(19): 109-115

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