MR阻尼器对钢-混凝土结构被动控制的振动台试验研究  

Shake table test of steel-concrete structure using MR dampers passive control

作　　者：尹长海 黄思凝 吕杨[3] 周洋[2] 孙枭 YIN Changhai;HUANG Sining;LV Yang;ZHOU Yang;SUN Xiao(Tianjin Construction Engineering Co.,Ltd.of China Railway First Engineering Group,Tianjin 300384,China;Key Laboratory of Building Collapse Mechanism and Disaster Prevention,China Earthquake Administration,Sanhe 065201,China;Tianjin Chengjian University,Tianjin 300384,China;China University of Petroleum,Qingdao 266580,China)

机构地区：[1]中铁一局集团天津建设工程有限公司,天津300384 [2]中国地震局建筑物破坏机理与防御重点实验室,河北三河065201 [3]天津城建大学,天津300384 [4]中国石油大学(华东),山东青岛266580

出　　处：《自然灾害学报》2021年第5期163-170,共8页Journal of Natural Disasters

基　　金：国家重点研发计划(2018YFC1504404);中国地震局建筑物破坏机理与防御重点实验室开放基金资助项目(FZ201104);中国地震局工程力学研究所地震工程与工程振动重点实验室(2020D05);中央高校基本科研业务费专项资金资助(18CX02075A);国家自然科学基金项目(52178295)。

摘　　要：文中对2个放置了2年多的新型磁流变阻尼器进行了力学性能试验,试验表明磁流变液沉降对阻尼器出力性能的影响很小。将阻尼器安装在一个1:4的三层钢-混凝土结构模型上进行了模拟地震振动台试验,试验对比分析了无控结构与采用passive off和passive on两种被动控制的结构动力响应,结果表明采用被动控制的结构底层相对位移峰值和均方根值都有一定程度的减小,结构顶层加速度峰值和均方根值部分工况存在放大现象。此外,结构内能分析表明,磁流变阻尼器能耗散很大一部分地震能量,减小了结构通过塑性变形所消耗能量的比例,进而起到控制结构损伤发展的目的。In this paper,the dynamic property of two new-type magnetorheological(MR) dampers which have designed and produced for more than 2 years were tested,results indicate that the settlement of magnetorheological fluid of MR dampers have little influence on the output force capacity.The two MR dampers were located on a 1∶4 scaled 3 story steel-concrete structure to carry out a shake table test,and the dynamic response of the structure with passive off and passive on control method were compared to the uncontrolled one,respectively.Results indicate that the peak and root mean square(RMS) value of relative displacement of the first story were reduced for both passive off and passive on control strategies,and the acceleration at the top of the structure were enlarged for some cases.In addition,the analysis of structure internal energy indicate that the MR dampers dissipate a large part of earthquake input energy,which decreased the proportion of energy dissipated by structure plastic deformation,and the damage process of the structure is controlled.

关 键 词：钢-混凝土结构 振动台试验 磁流变(MR)阻尼器 被动控制 

分 类 号：TU352[建筑科学—结构工程] X4[环境科学与工程—灾害防治]