钢框架结构隅撑位置及尺寸优化设计  

Optimization Design of Position And Size of Steel Frame Knee Brace Structure

作　　者：杨海军[1,2] 李深 蒋亚贤 高强 纪萌 YANG Hai-jun;LI Shen;JIANG Ya-xian;GAO Qiang;JI Meng(Hebei University of Architecture;Zhangjiakou Key Laboratory of engineering mechanics analysis.Zhangjiakou,Hebei 075000)

机构地区：[1]河北建筑工程学院,河北张家口075000 [2]张家口市工程力学分析重点实验室,河北张家口075000

出　　处：《河北建筑工程学院学报》2021年第3期1-4,37,共5页Journal of Hebei Institute of Architecture and Civil Engineering

基　　金：河北省教育厅重点项目(ZD2017027)。

摘　　要：研究了隅撑位置和截面尺寸对钢框架结构耗能能力影响。以隅撑与梁柱连接位置和截面尺寸为设计变量,以隅撑塑性应变能为目标函数,建立隅撑优化设计的数学模型,采用分步优化方法分别对尺寸和位置进行优化设计,并对优化前后的荷载位移曲线和滞回曲线进行了对比分析。选取典型算例进行地震时程响应分析,优化后结构的基底剪力、响应位移、加速度和相对层间位移均有一定程度减少,提高了结构抗震性能。表明本文对钢框架隅撑的优化设计方法可行。The influence of knee brace position and section size on energy dissipation capacity of steel frame structure was studied.Taking the connection position and section size of braces as design variables and the objective function of plastic strain energy of braces,the mathematical model of optimization design of braces was established.The size and position of braces were optimized by stepwise optimization method,and the load-displacement curves and hysteresis curves before and after optimization were compared and analyzed.Typical examples were selected to analyze the seismic time-history response,and the base shear,response displacement,acceleration and relative understorey displacement of the optimized structure were reduced to a certain extent,which improved the seismic performance of the structure,indicating that the optimization design method of steel frame braces in this paper is feasible.

关 键 词：隅撑支撑钢框架 ANSYS数值模拟 位置优化 时程分析 

分 类 号：TU391[建筑科学—结构工程]