新型耗能支撑的试验研究和有限元分析  

Experimental Study and Finite Element Analysis on New Energy Dissipation Brace

作　　者：孙学水 王湛[2] 胡淑军[2] 尹卫泽 王忠秋 柯峰 

机构地区：[1]广东杭萧钢构有限公司,广东珠海519055 [2]华南理工大学亚热带建筑科学国家重点实验室,广州510640

出　　处：《建筑钢结构进展》2014年第3期24-29,共6页Progress in Steel Building Structures

基　　金：国家自然科学基金(51178192,51378219,51378009);华南理工大学中央高校基本科研业务费项目(2012ZZ0099)

摘　　要：在高层钢结构的设计中,需设置一些耗能器来满足罕遇地震作用下的抗震性能。通过在普通钢管中间采用变截面的做法,能够改变构件住拉、压作用下的受力性能,从而提出了一种新型的耗能支撑。合理设计该种支撑后.分别进行试验分析和有限元分析,以研究支撑在往复荷载作用下的性能。对该种新型支撑进行参数化分析,以研究变截面长度、中间段长度和各部位厚度对支撑性能的影响。研究表明,支撑受压破坏时的变形较大,且仅发生在沿构件方向,不会发生整体失稳;合理设计的支撑,具有滞回曲线饱满、延性较好和承载力大等优点,可作为消能支撑使用。In the design of high_ rise steel structures,energy dissipaters are often used to satisfy seismic design requirement of steel structures subjected to rare earthquakes. In this paper, a new energy dissipation brace is proposed by using enlarged section in the middle part of the brace,which can change the mechanical behavior of brace under tension or compression. Both experimental study and finite element analysis are conducted to evaluate this new brace under cyclic loading. Based on parametric studies on the new braces,the influence of critical factors including variable section length, intermediate section length and thicknesses are evaluated. The analysis resuhs indicate the new energy dissipation brace has a large deformation under axial compressive force,which only occurs in axial direction,and therefure the brace can effectively prevent global instability. In addition,this brace has advantage in hysteretic curve plump loop,good ductility and Large load-carrying capacity,and thus it can be applied as energy dissipater in hiah-rise buildings.

关 键 词：耗能支撑 试验分析 有限元分析 耗能能力 

分 类 号：TU393.2[建筑科学—结构工程] TU352.1