圆管桁架受压腹杆平面内计算长度有限元分析  

Finite Element Analysis on In-Plane Effective Length of Compressive Web Members in CHS Truss

作　　者：林彦[1] 周学军[1] 

机构地区：[1]山东建筑大学土木工程学院,济南250101

出　　处：《建筑钢结构进展》2013年第1期45-49,共5页Progress in Steel Building Structures

基　　金：山东省自然科学基金(Q2008F11)

摘　　要：利用有限元分析方法研究了平面圆管桁架受压腹杆平面内计算长度的主要影响参数以及计算长度随各参数的变化规律。研究结果表明:影响圆管桁架受压腹杆平面内计算长度的主要因素为受压腹杆与弦杆的直径比、壁厚比以及弦杆直径与壁厚的比值,并且随着上述各参数的增大,受压腹杆平面内计算长度系数均呈增大的趋势。最后,根据几十种不同影响参数的有限元计算结果,提出了可供工程应用的圆管桁架受压腹杆平面内计算长度系数的建议值。In the paper,the main influencing parameters on in-plane effective length for compressive web members in circular hollow section (CHS) truss are studied by using finite element method.The results show that the diameter ratio and wall thickness ratio of compressive web members to chord members,and diameter-to-thickness ratio of chord members have remarkable effects on the in-plane effective length of compressive web members.The results also show that with the increasing of these three parameters,the in-plane effective length factor increases.Based on analytical results of many kinds of models with different dimensions,the suggestive values for in-plane effective length factors of compressive web members are proposed,which can provide reference for engineering design.

关 键 词：圆管桁架 受压腹杆 平面内计算长度系数 有限元分析 

分 类 号：TU392.3[建筑科学—结构工程]