全钢自复位屈曲约束支撑框架地震响应分析  

SEISMIC RESPONSES OF ALL-STEEL SELF-CENTERING BUCKLING-RESTRAINED BRACED FRAME

作　　者：张会[1] 曾鹏[2] 王春林[3] 

机构地区：[1]金肯职业技术学院建筑与土木工程系,南京211156 [2]中国电力工程顾问集团华东电力设计院有限公司,上海200063 [3]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京210096

出　　处：《建筑技术》2016年第12期1110-1114,共5页Architecture Technology

基　　金：江苏省高校自然科学基金(12KJB560001);江苏省专业带头人高端研修项目;江苏高校品牌专业建设工程一期项目(PPZY2015C233);2014年度江苏省高校青蓝工程项目

摘　　要：为研究全钢自复位BRB框架的抗震性能,以BRB框架设计为参照,根据"等强原则"和支撑自复位要求,在确定ST-SCBRB核心板面积的基础上改变预应力筋的数量,研究其对SCBRB框架地震响应的影响。分析表明:SCBRB框架的层间位移角小于"等强原则"下BRB框架的层间位移角;SCBRB中预应力筋根数越多,SCBRB刚度越大,对应框架层间位移角越小,同时也对支撑的变形需求减小;楼层加速度和层间剪力会有一定程度的增加,其中增加的剪力主要由SCBRB承担,框架柱承担的剪力作用反而减小;SCBRB的变形能力因初始张拉应变减小有所提高,故存在一个能使SCBRB的性能满足需求的最优预应力筋数量。In order to investigate the seismic performance of all-steel self-centering BRB （SCBRB） frames, a conventional BRB frame was designed as a reference structure. Based on the equal-strength principle and the self-centering requirement, the number of prestressed tendons was varied with the determination of the area of the core plate, to study the effect on the seismic response of the SCBRB frames. Analysis showed that the inter-story ratio of the SCBRB frame was less than that of the corresponding BRB frame designed with the equal-strength principle. With more tendons in the SCBRB, the stiffness of the SCBRB became larger, but the inter-story ratio of the frame and the demand of the ductility of the brace became smaller. The floor acceleration increased considerably, as well as the shear force, which is mainly sustained by the SCBRB other than the columns. The ductility of the SCBRB increased due to the reduced initial tensile strain, so there is an optimal number of tendons to make the performance of the SCBRB meet the demands.

关 键 词：自复位屈曲约束支撑 预应力筋 残余变形 滞回性能 

分 类 号：TU352.1[建筑科学—结构工程]