粘弹性阻尼器减震结构基于位移减震域的设计方法

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (13) : 35-42.

论文

刘文光1 阎美智1 于维欣1 何文福1

作者信息 +

Design method based on displacement damping region for viscoelastic damper-added structures

LIU Wenguang1, YAN Meizhi1, YU Weixin1,HE Wenfu1

Author information +

文章历史 +

摘要

对高烈度区设置粘弹性阻尼器的减震结构进行了地震作用下的非线性动力时程分析，提出了减震结构位移减震域的概念，并定义层间位移减震比来评价减震结构的减震效应。建立了不同高度质点系模型并完成了结构动力响应分析，研究了阻尼器参数及设置位置对结构层间位移减震效果的影响域。通过对层间位移减震比进行曲线拟合，提出了减震域的预测计算公式，并以实际工程案例对拟合函数进行了验证。研究表明粘弹性阻尼器对结构设置层以上的减震效果较设置层以下的减震效果明显，且粘弹性阻尼器参数及不同设置层的减震比具有线性叠加的特点。减震结构在减震目标确定后，可采用文中减震比拟合公式对阻尼器设置效果进行快速评价。

Abstract

Nonlinear dynamic time history analysis was conducted for structures with viscoelastic dampers under seismic action in a high intensity earthquake region. The concept of displacement damping region of damper-added structures was proposed, and the damping effect of damper-added structures was evaluated using the inter-story displacement damping ratio. Mass-point systems’ models with different heights were established to perform seismic response analysis of structures, the effects of damper’s parameters and its position on structures’ inter-story displacement damping region were studied. The formula for predicting damping region was proposed through curve-fitting of the inter-story displacement damping ratio. The fitted function was verified with practical engineering cases. The study showed that the damping effect of viscoelastic damper on the structure’s upper part above the layer with damper added is more significant than that on the structure’s lower part below the layer with damper added; damper’s parameters and damping ratios of different layers with damper added have the feature of linear superposition; the fitted formula of the damping ratio can be used to fast evaluate the damping effect of damper-added structures after their vibration reduction objectives are determined.

导出引用

刘文光1 阎美智1 于维欣1 何文福1. 粘弹性阻尼器减震结构基于位移减震域的设计方法[J]. 振动与冲击, 2018, 37(13): 35-42

LIU Wenguang1, YAN Meizhi1, YU Weixin1,HE Wenfu1. Design method based on displacement damping region for viscoelastic damper-added structures[J]. Journal of Vibration and Shock, 2018, 37(13): 35-42

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