基于杆系模型的磁流变阻尼结构弹塑性动力反应分析  

Elastic-plastic dynamic response analysis on frame structure incorporated with MR dampers based on the member model of system

作　　者：张香成[1] 徐赵东[1] 冉成崧[2] 朱俊涛[1] 

机构地区：[1]东南大学混凝土与预应力混凝土教育部重点实验室,南京210096 [2]四川省建筑设计院,成都610017

出　　处：《振动与冲击》2013年第6期100-104,共5页Journal of Vibration and Shock

基　　金：国家863高科技计划(2009AA03Z106);江苏省科技支撑计划(B12010069);常州市国际合作项目(CZ2009004);江苏省普通高校研究生科研创新计划项目(CXLX_0131)

摘　　要：磁流变阻尼器(MRD)是一种性能优越的半主动控制装置。首先推导了设置有MRD框架结构中MRD的位置矩阵,然后将框架结构简化为杆系模型,用MATLAB编制了加入MRD的框架结构的弹塑性动力时程分析程序,分别计算并对比了框架结构在未控和有控下各层的位移、加速度响应和各杆端塑性铰分布情况。结果表明,设置MRD的框架结构各层位移和加速度响应显著减小,其中位移的减震效果优于加速度的减震效果,同时杆件屈服数量相应减少。Magneto-theological damper （MRD） is an excellent semi-active control device. The location matrix of MRD in the frame structure incorporated with MRD was derived. Then a member model was selected as the mathematical model of the structure. An elastic-plastic dynamic response analysis of the structure incorporated with MRD was programmed by using MATLAB. The displacement and acceleration responses of the structure with and without MRD, as well as the distribution of plastic hinges of the member, were calculated and compared. Comparison results show that the displacement and the acceleration responses of each floor of the structure with MRD were reduced significantly, in which the vibration mitigation effect on displacement is superior to that on acceleration. At the same time, the number of plastic hinges is also reduced.

关 键 词：磁流变阻尼器 杆系模型 弹塑性 动力分析 框架结构 

分 类 号：TU352.1[建筑科学—结构工程]