建筑结构学报2011，Vol.32Issue(9)：135-140,6.
基于杆端缩尺的钢桁架结构二次优化
Secondary optimization of steel truss structures based on section-shrinkage of member ends
摘要
Abstract
The secondary forces of rectangular steel tube truss with bowknot integral joints can be significantly reduced as a result of the section-shrinkage in height at member ends.Taking a simply supported Warren truss as the research object,the optimization design of steel truss structures based on section-shrinkage of member ends were conducted using ANSYS software.The influences of key structural parameters on the minimum steel consumption were systematically analyzed.In the optimization formulation,section thickness,height-shrinkage ratio and length-shrinkage ratio were defined as design variables.Requirements related to structural vertical stiffness,sectional stress,stability of compressed member and overall stability of truss structure were set as constraint functions.The determination of member stability factors was based on the FEA results of ultimate strengths of the compressed members with section-shrinkage at ends.Results show that the steel consumptions of secondary optimization with section-shrinkage of member ends are less than those of primary optimization without section-shrinkage,provided that the steel grade of segments with section shrinkage is moderately improved.关键词
钢桁架/领结式整体节点/杆端缩尺/次内力/结构优化/最小用钢量Key words
steel truss/bowknot integral joint/section-shrinkage of member end/secondary force/structural optimization/minimum steel consumption分类
土木建筑引用本文复制引用
程斌,何胜华,赵金城..基于杆端缩尺的钢桁架结构二次优化[J].建筑结构学报,2011,32(9):135-140,6.基金项目
高等学校博士学科点专项科研基金项目 （）
上海交通大学大学生创新实践计划项目 （）
