约束屈曲支撑在棋盘形四角锥网架中的应用分析  

Analysis of the Chessboard-shaped Pyramid Space Grid with Buckling-restrained Brace

作　　者：张秦[1] 孟文清[2] 孙彤[3] 朱恩静[2] 

机构地区：[1]四川大学建筑与环境学院,四川成都610207 [2]河北工程大学土木工程学院,河北邯郸056038 [3]河北建设集团安装工程有限公司,河北保定071000

出　　处：《工程抗震与加固改造》2010年第4期43-46,共4页Earthquake Resistant Engineering and Retrofitting

摘　　要：约束屈曲支撑(BRB)是一种滞回性能良好的减震构件,为了研究其在大跨度网架结构中的合理应用,本文以一64m跨度棋盘形四角锥网架为例用SAP2000建模分析。综合考虑BRB的特性和棋盘形四角锥网架受力特点给出了7种替换方案。对替换前后结构的地震响应做对比分析,发现BRB能有效减小网架的地震响应,且替换四周边跨中部的腹杆比替换上弦杆的减震效果好,并优选出较优减震方案,为棋盘形四角锥网架减震设计提供参考。Buckling-restrained brace（BRB） is a kind of shock absorber rods with hysteretic behavior.In this paper,a 64m-span board cone-shaped square grid is made as an example for modeling and analysis using SAP2000 to study the rational application of BRB in large-span space truss structure.Comprehensive consideration of BRB properties and force characteristics of grid,7 kinds of replacement program are provided.Right before and after replacement of the structure to do comparative analysis of the seismic response,a conclusion is found that BRB can effectively reduce the seismic response of space truss,in addition,to replace the four surrounding belly bars is better than to replace winding plane bars.Then,the best damping program in seven kinds of programs is selected to provide a reference for the checkerboard grid square pyramid-shaped shock absorber design.

关 键 词：约束屈曲支撑 棋盘形四角锥网架 时程分析 

分 类 号：TU399[建筑科学—结构工程]