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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

25卷

期数:

2008年01期

页码:

70-75

栏目:

出版日期:

2008-03-20

文章信息/Info

Title:

Effect of Finite Twist on Mechanical Behaviors of Box-section Stub-column Under Axial Compression

作者:

陈星，陈以一

同济大学土木工程学院,上海200092

Author(s):

CHEN Xing, CHEN Yi-yi

School of Civil Engineering, Tongji University, Shanghai 200092, China

关键词:

扭转箱形截面短柱;  受力性能;  轴压极限承载力;  有限元分析

Keywords:

twisted box-section stub-column;  mechanical behavior;  axial compressive ultimate bearing capacity;  finite element analysis

分类号:

TU338

DOI:

-

文献标志码:

A

摘要:

为研究具有有限扭转的箱形截面短柱轴压受力性能,对其进行了弹性屈曲分析和非线性分析。揭示了初始扭转对轴压短柱中板件的荷载条件、边界条件、局部应力分布特点造成的影响:在弹性状态下,非加载边上存在弯曲约束和横向膜应力,加载边上平行加载方向的截面应力分布不均。指出了箱形截面短柱轴压刚度和极限承载力随相对扭转角增大而增大的一般规律,箱形截面短柱极限承载力对于较小相对扭转角的不敏感性,以及破坏模式同相对扭转角大小的相关性,即很大的相对扭转角会导致破坏模式由局部屈曲转变为局部的强度破坏。

Abstract:

In order to study the effect of finite twist on mechanical behaviors of box-section stub-column under axial compression, the elastic buckling analysis and nonlinear analysis were performed. The effects of different twisting angles for stub-column under axial compression on load condition, boundary condition and distribution characteristic of local stresses were indicated. At elastic phase, there were bending constraint and transverse membrane stress on the unloaded edges, and the distribution of stress parallel to loading direction was nonuniform on loaded edges. It was found that axial compressive stiffness and ultimate bearing capacity of box-section stub-column would increase with the increase of relative twisting angle. Finally, different failure modes of large twisting angle were identified, which would change from local buckling to local strength failure. In addition, ultimate bearing capacity of box-section stub-column was also found to be insensitive to small relative twisting angles.

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备注/Memo

备注/Memo:

收稿日期:2007-11-19
基金项目:“十五”国家科技攻关项目(2004BA904B01)
作者简介:陈 星(1982-),男,四川达州人,工学硕士研究生,E-mail:chenxing_tj@126.com。

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更新日期/Last Update: 2008-03-20