基于模型试验的软夹层地基与刚性地基上隔震结构体系耗能特性分析

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (10) : 73-82.

论文

于旭1,2 庄海洋2, 朱超2

作者信息 +

Analysis on energy dissipation of isolated structure on rigid foundation and soft interlayer soil foundation based on model test

Yu Xu1,2, Zhuang Hai-yang 2, Zhu Chao 2

Author information +

文章历史 +

摘要

基于能量分析法提出了考虑土-结构动力相互作用（SSI效应）的隔震结构体系能量反应平衡方程，通过对软夹层地基和刚性地基上隔震结构体系振动台模型试验的耗能分析，研究了软夹层地基和刚性地基上隔震结构体系的耗能特性。研究结果表明：本文提出的土-隔震结构动力相互作用体系能量反应平衡方程能够有效地反映土-隔震结构动力相互作用体系各部分的能量反应。由于SSI效应的影响，软夹层地基上隔震结构隔震层的滞回变形耗能比、动能能量比和阻尼耗能比与刚性地基时耗能反应明显不同，大震时SSI效应影响更为显著，表现为隔震结构的动能能量比和阻尼耗能比增大，而隔震层的滞回变形耗能比降低，降低幅度与输入地震动的特性相关。软夹层地基上隔震结构的动能能量比与隔震层转动效应的强弱密切相关，阻尼耗能比与隔震结构体系的阻尼比相关。

Abstract

Based on energy method, energy response equations on soil- isolated structure interaction system are proposed. By comparative analysis on energy dissipation of shaking table test for isolated structure on soft interlayer soil foundation and rigid foundation, characteristics of energy dissipation of isolated structure on soft interlayer soil foundation and rigid foundation are studied. The results of the research show that energy response equations proposed in this paper can illustrate the pattern of energy allocation of soil- isolated structure interaction system. The total enegy of the ground motion , which is inputted to isolated structure on soft interlayer soil foundation , is dissipated mainly by hysteresis deformation of isolation layer, it is on soft interlayer soil foundation that the ratios of hysteresis deformation energy of isolation layer , ratios of kinetic energy and ratios of damping energy of isolated structure are different to those on rigid foundation, with the peak acceleration of input motion larger, SSI effect has a significant influence on energy dissipation of isolation structure, that is, ratios of kinetic energy and ratios of damping energy of isolated structure is increased, the ratios of energy dissipation of isolation layer is decreased, which is related to the characteristics of input earthquake motion. It is on soft interlayer soil foundation that the ratio of kinetic energy is related to rotation effect of isolation layer, and the ratio of damping energy is related to damping ratio of the isolated structure.

导出引用

于旭1,2 庄海洋2, 朱超2. 基于模型试验的软夹层地基与刚性地基上隔震结构体系耗能特性分析[J]. 振动与冲击, 2016, 35(10): 73-82

Yu Xu1,2, Zhuang Hai-yang 2, Zhu Chao 2. Analysis on energy dissipation of isolated structure on rigid foundation and soft interlayer soil foundation based on model test[J]. Journal of Vibration and Shock, 2016, 35(10): 73-82

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