不锈钢箱形截面轴心受压构件整体稳定性有限元研究
- 摘 要
-
(1 北京工业大学建筑工程学院，北京 100124； 2 北京交通大学土木建筑工程学院，北京 100044)
［摘要］为研究不锈钢箱形截面轴心受压构件的整体稳定性，采用ANSYS软件对奥氏体和双相体两种不锈钢箱形截面轴心受压构件的整体稳定性进行了数值模拟，模拟中考虑了材料的非线性本构模型、构件的初始几何缺陷、残余应力的影响。重点通过不锈钢箱形截面构件在轴压作用下的荷载-位移曲线、截面应变发展情况及极限承载力对其整体稳定性能进行阐述。通过对比有限元模拟值、试验值以及根据规范计算的承载力，认为采用ANSYS软件能对不锈钢箱形截面轴心受压构件进行准确地模拟，残余应力对箱形截面的极限承载力影响较小，《钢结构设计规范》（GB 50017—2003）不适用于不锈钢整体稳定性设计。［关键词］不锈钢; 整体稳定性; 轴心受压; 箱形截面; 有限元研究中图分类号：TU391 文献标识码：A 文章编号：1002-848X(2016)06-0066-05
Overall stability FEA study on stainless steel box-section member under axial compressionShang Fan1, Yang Lu1, Zhao Menghan1, Xu Dongchen2, Zhang Yong2(1 College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China; 2 School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China）Abstract:In order to study the overall stability of stainless steel box-section members under axial compression, the ANSYS software was used to carry out numerical simulation on the overall stability of austenitic and duplex stainless steel box-section members under axial compression. The nonlinear constitutive material model, the initial geometric imperfections and residual stress distribution effect were considered in the simulation. The overall stability of box-section stainless steel members under axial compression was illustrated through load-displacement curves, strain development and the ultimate bearing capacity. By comparing the ultimate bearing capacity of finite element simulation, experiments and specification predictions, the ANSYS software can be proved accurately simulating box-section stainless steel members under axial compression and that residual stress slightly affects the ultimate bearing capacity of box-section stainless steel members. The Code for design of steel structures (GB 50017—2003) is not applicable for the overall stability design of the stainless steel members.Keywords:stainless steel; overall stability; axial compression; box-section; finite element analysis
通讯作者：杨璐，博士，副教授，Email: lyang@bjut.edu.cn。
