基于失效模式的半刚性钢框架结构优化设计  

Optimal Design of Semi-rigid Steel Frame Structure Based on Failure Mode

作　　者：蓝煜明 王湛[1] 卢盛灿 LAN Yuming;WANG Zhan;LU Shengcan(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学土木与交通学院,广东广州510640

出　　处：《贵州大学学报（自然科学版）》2021年第2期91-97,共7页Journal of Guizhou University:Natural Sciences

基　　金：国家自然科学基金资助项目(51978279)。

摘　　要：本文为实现半刚性钢框架结构的失效模式控制,获得具备整体耗能能力及经济性的结构设计方案,使用基于能量平衡的塑性设计方法中的失效模式控制约束条件,同时考虑钢框架结构的梁柱连接节点半刚性的影响,通过精英保留的遗传算法进行结构优化设计。以一榀十层单跨钢框架结构为例进行优化,对优化设计结果进行Pushover分析,研究其塑性铰的成铰顺序及失效模式。研究结果表明,考虑失效模式控制的结构优化,能使半刚性钢框架结构在失效时发展出具有较好耗能能力的失效模式,同时使整体结构具有良好的延性,保证使用人员所需的反应时间。The optimal structure design is performed through the genetic algorithm with the elitist strategy,considering the influence of semi-rigid beam-to-column connections of steel frame and using the constraint condition of failure mode control with the plastic design based on energy balance,to realize the failure mode control of semi-rigid steel frame structure and obtain the economic design of structure with global energy dissipating capacity.The optimal design of a ten-story single-span steel frame structure is carried out and the plastic hinges and failure mode of the optimal design result are studied through Pushover analysis.The result show that the optimal design with failure mode control makes the semi-rigid steel frame structure develop a failure mode with better energy dissipating capacity,which makes the structure have a better ductility and ensures the response time required by users.

关 键 词：钢框架 失效模式控制 结构优化设计 半刚性连接 

分 类 号：TU391[建筑科学—结构工程]