基于体系可靠度的粘滞阻尼拓扑优化分析  

System Reliability Based Topological Optimal Analysis for Viscous Dampers

作　　者：孙香红[1,2] 王社良[1] 樊燕军[2] 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]长安大学建筑工程学院,西安710061

出　　处：《武汉理工大学学报》2010年第9期80-84,共5页Journal of Wuhan University of Technology

摘　　要：考虑地震动随机性的影响,提出了基于结构体系可靠度进行粘滞阻尼受控结构的拓扑优化分析方法,采用遗传算法,编制了粘滞阻尼拓扑优化计算程序。分析了一个8层剪切型框架的粘滞阻尼拓扑优化,并与穷举法的结果进行了对比分析,证明了该优化方法的正确性与可靠性。应用概率密度演化分析方法,得出了粘滞阻尼最优拓扑时的受控结构、全加阻尼的受控结构和无控结构的体系可靠度,结果表明:采用较少阻尼器的最优拓扑的粘滞阻尼结构的体系可靠度非常接近全加阻尼器的粘滞阻尼结构的体系可靠度,经济效益显著,具有工程实用价值。In the view of earthquake randomness,topological optimization method based on system reliability for viscous dampers is proposed in shear frame structure.An optimization program is accomplished using improved genetic algorithm in this paper.Topological optimization of viscous dampers of an 8-story frame with viscous dampers using the program is analyzed.Comparing with the exhaustion algorithm,the proposed method is accurate and reliable.Appling probability density evolution method,the system reliability are obtained respectively,for structure without viscous damper,structure with viscous dampers in each storey,and structure with optimally placed viscous dampers.The result indicates that system reliability of the structure with viscous dampers is increased obviously.Furthermore,the system reliability of the structure with optimally placed viscous dampers is almost equal to that of the structure with dampers in every storey.It is shown that the proposed topological optimization method based on system reliability for viscous damper is economical and valuable in engineering practice.

关 键 词：结构体系可靠度 遗传算法 粘滞阻尼 拓扑优化 

分 类 号：TU311[建筑科学—结构工程] O328[理学—一般力学与力学基础]