引用本文:杨浴儿, 孟二从, 乔克, 袁军.箱形预应力撑杆钢柱整体稳定性能研究[J].西南师范大学学报(自然科学版),2019,44(4):100~105
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箱形预应力撑杆钢柱整体稳定性能研究
杨浴儿, 孟二从, 乔克, 袁军
西南大学 工程技术学院, 重庆 400715
摘要:
预应力撑杆钢柱具有稳定性能好、承载能力高等优点.采用有限元软件ABAQUS对中心柱截面为箱形的预应力撑杆钢柱进行了数值分析,并通过理论公式验证了数值分析的准确性.在此基础上进行线性和非线性屈曲分析,考察撑杆长度、撑杆截面尺寸以及初始缺陷大小等因素对这类结构构件整体稳定性能的影响.分析表明:当屈曲模态为对称屈曲时,增加撑杆长度可以有效提升箱形预应力撑杆钢柱的承载能力;同样地,撑杆截面尺寸对这类结构构件承载能力的影响也与其屈曲模态相关.
关键词:  预应力撑杆柱  箱形截面  数值分析  整体稳定性能  屈曲模态
DOI:10.13718/j.cnki.xsxb.2019.04.017
分类号:TU391
基金项目:中国博士后科学基金资助项目(2017M623302XB);重庆市博士后资助项目(Xm2017033);中央高校基本业务费专项资金资助(XDJK2018C036).
Investigation into Global Stability Behavior of Box Sectional Prestressed Stayed Steel Column
YANG Yu-er, MENG Er-cong, QIAO Ke, YUAN Jun
College of Engineering and Technology, Southwest University, Chongqing 400715, China
Abstract:
Prestressed stayed steel column is a structural type with superior stability behavior and load carrying capacity. In this study, the global stability of box sectional prestressed stayed steel columns has been investigated by means of the finite element software ABAQUS, and the accuracy of the numerical analysis has been validated by theoretical formula. Both linear and nonlinear buckling analyses have been conducted in this work, and the effects of crossarm lengths, crossarm dimensions and imperfection magnitudes on the stability behavior have also been studied. It has been demonstrated that increasing the crossarm length could improve the load carrying capacity of prestressed stayed steel columns effectively when the buckling mode is symmetric. Similarly, the effect of crossarm dimension on the capacity is also correlated to the buckling mode.
Key words:  prestressed stayed columns  box section  numerical analysis  global stability behavior  buckling mode
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