基于风洞试验成果的大跨度网壳结构优化  

Optimization of large-span latticed shell based on wind tunnel test results

作　　者：齐月芹[1] 张婷[1] 徐步青[1] 

机构地区：[1]石家庄铁道大学工程力学系,河北石家庄050043

出　　处：《空间结构》2011年第2期30-34,共5页Spatial Structures

摘　　要：以某大跨度网壳结构为研究对象,对建筑结构进行了风洞试验.将风洞试验体型系数结果引入大跨度网壳结构并优化设计.应用复形法建立了网壳结构目标函数,初步拟定网壳结构的网格尺寸、网壳厚度、网壳矢高,以杆件的截面面积为设计变量,杆件的强度和最小截面尺寸为约束条件,并编制了相应的程序,对三圆弧网壳结构外形尺寸进行多种方案的优化设计,比较试验与规范风载体型系数优化结果,为类似网壳结构设计提供参考.Wind tunnel test is carried out to determine the shape coefficient of shell structures which isincorporated into the structural optimization procedure. Objective function of optimization, where the grid size, vault thickness, rise of arch and area of the cross-section are design variables, is established byutilizing complex method with strength of the member and minimum cross section size as constraint condition. Program code is developed and implemented for optimization of three-center latticed shell structures. By comparing the optimization results of wind tunnel test with those obtained by shape coefficient code, some meaningful conclusions helpful for the design of latticed shell structures is drawn.

关 键 词：风载试验 体型系数 网壳结构 优化设计 

分 类 号：TU393.3[建筑科学—结构工程]