基于改进遗传算法的大跨机库柱间消能支撑的位置优化研究  

Research on location optimization of energy dissipation braces between columns of long-span hangar based on improved genetic algorithm

作　　者：徐庆阳[1] 李爱群[2] 丁幼亮[2] 沈顺高[3] 胡灿阳[1] 

机构地区：[1]南京审计学院江苏公共工程审计重点实验室,江苏南京211815 [2]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京210096 [3]中国航空工业规划设计研究院,北京100120

出　　处：《土木工程学报》2013年第6期35-43,共9页China Civil Engineering Journal

基　　金：国家自然基金面上项目(51178100);江苏省自然科学基金面上项目(BK2011693);江苏省高校自然科学研究项目(10KJB560003)

摘　　要：大跨维修机库动力特性复杂,针对该类结构的减震研究则刚刚起步。结合大跨机库的地震响应特点,采用布置柱间消能支撑来进行机库结构地震响应的被动控制。结合减震结构优化模型特点与主要优化算法的数学原理,选取遗传算法作为结构减震装置位置优化分析工具,并在Matlab遗传工具箱基础上进行改进以提高寻优效率,通过编制目标函数程序实现改进遗传算法在结构被动控制系统位置优化分析中的应用。最后设置两类不同的适应度函数,分别进行机库结构减震位置优化与考虑阻尼器耗能效率的减震方案优化分析,结果表明遗传算法以及相应的优化程序可以有效地实现机库结构减震位置优化分析。Dynamic characteristics of long-span hangar are very complex and the study on the shock absorption of this type of structure is just at the early stage. Combined with seismic response characteristics, fluid viscous dampers are set between columns and joints of the roof to reduce the seismic response. Based on the characteristics of optimization model of seismic reduction structure, the genetic optimization algorithm is employed for the optimization analysis of damper location. The algorithm is improved for the increased optimization efficiency and accuracy. By means of the Matlab toolbox, a damper program for the location optimization of seismic reduction structure is coded. Two types of fitness functions are provided and used for the damper location optimization of one hangar. Results show that the location optimization analysis may be conducted effectively by using the proposed optimization algorithm and the coded program.

关 键 词：大跨维修机库 被动控制 消能支撑 遗传算法 位置优化 

分 类 号：TU352.1[建筑科学—结构工程] TU393.3