弦管轴向应力对TX型和XX型矩形管节点轴向承载力的影响  

Influence of chord stress on axial strength of rectangular tubular TX- and XX-joints

作　　者：石永久[1] 祝磊[1] 王元清[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《空间结构》2005年第1期8-12,共5页Spatial Structures

摘　　要：管节点通常是弦管和支管都受到轴向力作用,弦管应力可能对节点轴向承载力有显著的影响.本文使用有限元软件ANSYS分析了弦管应力对TX型和XX型矩形管节点轴向承载力的影响,并与相应的平面T型和X型矩形管节点作了对比.采用Lu的方法判定节点承载力.结果表明,弦管拉力对节点承载力的影响可以忽略,而弦管压力则会降低节点承载力,本文计算结果与相关规范有一定差异.For tubular joints, chords and braces are often axially loaded and the chord stress may have a significant influence on the axial strength of the joints. This paper analyses the influence of chord stress on the axial strength of rectangular tubular TX- and XX-joints with FE package ANSYS and carries out the comparison against planar rectangular T- and X-joints. The ultimate capacity is defined according to Lu's method. The results show that the influence of chord tension can be negligible, while chord compression may decrease the ultimate capacity of the joints, and the numerical results are different with corresponding codes to some extent.

关 键 词：轴向承载力 管节点 TX型 矩形 轴向应力 ANSYS分析 有限元软件 计算结果 力作用 

分 类 号：TU375.3[建筑科学—结构工程] TU392.3