TMD-基础隔震混合控制体系在近场地震作用下的能量响应与减震效果分析

王亚楠;李慧;杜永峰;

振动与冲击 ›› 2014, Vol. 33 ›› Issue (4) : 204-209.

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PDF(1247 KB)
振动与冲击 ›› 2014, Vol. 33 ›› Issue (4) : 204-209.
论文

TMD-基础隔震混合控制体系在近场地震作用下的能量响应与减震效果分析

  • 王亚楠1,李慧1,2,杜永峰1,2
作者信息 +

Energy response and effectiveness analysis for base-isolated structure with TMD under near fault ground motions

  • Wang Ya-nan1,Li Hui1,2, Du Yong-feng1,2
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摘要

基于能量平衡原理对近场地震作用下TMD-基础隔震混合控制体系进行了能量响应分析,研究了不同脉冲周期地震作用下混合控制体系的减震效果。采用Bouc-Wen模型模拟隔震层的非线性力-变形行为,建立了TMD-基础隔震混合控制体系的运动方程和相对能量平衡方程。以某八层基础隔震结构为算例,运用四阶龙格-库塔法和梯形法分别对结构安装TMD前后的非线性地震响应和能量响应进行求解,分析了混合控制体系中输入能量的变化和耗散过程。分析结果表明:以隔震层峰值位移作为控制对象时,TMD的控制效果并不好;从能量的角度来看,TMD对主结构的输入能,特别是隔震层滞回耗能的控制非常有效,这是因为TMD的阻尼耗散了体系中的大部分输入能;不同脉冲周期地震作用下TMD的减震效果差别较大,对TMD最优参数进行求解时应考虑地震动特性的影响。

Abstract

Based on energy balance principle, the energy response anlysis of the hybrid control system which is consisted of base-isolation and TMD is carried out, and the vibration control effectiveness of the hybrid control system under seismic ground motions with different pulse periods is studied. The Bouc-Wen model is adopted to simulate the isolation layer’s nonlinear force-deformation behavior. The motion equation and the relative energy balance equation are established. A eight-storey base-isolated structure is employed herein as an numerical example. The seismic response and energy response of the base-isolated structure with and without TMD are calculated using the fourth-order Runge-Kutta method and the trapezoidal rule, respectively. Input energy’s transformation and dissipation process of the hybrid control system are analyzed. Analysis results show that TMD’s control effect on the isolation layer’s peak displacement is not good. From the standpoint of the energy, TMD’s control to the input energy of the primary structure, especialy to the isolation layer’s hysteretic energy is very effective, and it’s the result of the energy dissipation by TMD’s damping. TMD shows different control effectiveness under seismic ground motions with different pulse periods, and the influence of the seismic grond motion’s characteristics should be considered when solving TMD’s optimum prameters.



关键词

基础隔震 / TMD / 近场地震动 / 非线性地震响应 / 能量响应

Key words

base isolation / tuned mass damper / near-fault ground motion / nonlinear seismic response / energy response

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王亚楠;李慧;杜永峰;. TMD-基础隔震混合控制体系在近场地震作用下的能量响应与减震效果分析[J]. 振动与冲击, 2014, 33(4): 204-209
Wang Ya-nan;Li Hui; Du Yong-feng;. Energy response and effectiveness analysis for base-isolated structure with TMD under near fault ground motions[J]. Journal of Vibration and Shock, 2014, 33(4): 204-209

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