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DYNAMIC ANALYSIS OF STRUCTURES WITH VISCOUS DAMPERS BASED ON SPACE COOPERATION THEORY
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摘要: 如何控制结构在地震作用下的扭转作用是结构抗震设计中经常遇到的问题。采用建筑结构的空间协同模型动力分析方法,推导了黏滞阻尼器减震结构的附加阻尼矩阵、动力平衡方程,分析地震作用下高层钢结构中设置黏滞阻尼器的减震效果。改进后的程序能够计算黏滞阻尼器减震结构在双向地震波作用下的动力时程反应。空间力学模型可考虑局部楼板变形对结构地震反应的影响,考虑了错层结构、大底盘上部多塔结构、连体结构等复杂的结构形式,可沿任意角度输入相互垂直的两个水平地震动分量,可求解结构每层及结构构件和黏滞阻尼器的内力和变形。分析结果表明,黏滞阻尼器能够大量消耗地震输入能量,减小主体结构的地震反应。Abstract: How to control the torsional response of structures under earthquake action is a problem frequently occurred in seismic design.The main objective of this paper is to present a reasonable numerical method for the time-history analysis of structures with viscous dampers,particularly those with irregular configurations,the supplemental damping matrix of structures with viscous dampers is incorporated into a general nonlinear dynamic analysis program,which can consider the effects of deformation of local floor and the propagation direction of earthquake excitations.Example is provided to validate the dynamic analysis method and observe the seismic mitigation effect of viscous dampers.The inner forces and deformation of structural members and viscous dampers can be given.
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[2] Hanson Robert D,Soong Tsu T.Seismic Design with Supplemental Energy Dissipation Devices.Earthquake Engineering Research Institute,Buffalo,New York:2001:38 -44 魏琏,郑久建,韦承基,等.论黏滞阻尼减震结构及其抗震设计方法.建筑结构,2004.34(Io):10-16 [3] 薛彦涛,韩雪.诜置非线性黏滞阻尼器结构地震响应的时程分析.工程抗震与加固改造.2005.27(2):40-45 [4] 汤曼川,张玉良,张铜生.黏滞阻尼器减震结构的非线性动力分析.工程力学.2004,21(1):67-71 [5] 韩玉荣.钢筋混凝土房屋结构空间协同非线性地震反应分析.长沙:湖南大学.1995 [6] 杨佑发,郭玉荣,邹银生.串并联刚片系模型弹塑性时程分析.湖南大学学报,1997,24(5):56-59 [7] 杨佑发,邹银生.底部框剪砌体房屋空间弹塑性地震反应分析.振动与冲击,2003,22(1):20-23 -
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