双相型不锈钢焊接工字形截面轴压柱整体稳定性能试验研究

发布时间：2018-03-11 12:06

本文选题：双相型不锈钢　切入点：焊接工字形截面　出处：《建筑结构学报》2015年07期 　论文类型：期刊论文

【摘要】：为了研究双相型不锈钢材料轴心受压构件的整体稳定性能,对11根EN 1.4462双相型不锈钢焊接工字形截面柱试件进行了轴心受压试验研究。根据试验前测量得到的试件几何初弯曲和试验过程中量测得到的荷载初始偏心,分析了该类型构件的失稳模态和整体稳定承载力,并将试验数据计算结果与采用现行欧洲钢结构设计规范EN 1993-1-4和GB 50017—2003《钢结构设计规范》的计算结果进行了对比。结果表明:所有试件均呈现整体失稳,其中5根试件为强轴失稳模式,6根试件为弱轴失稳模式,未发生板件的局部屈曲,部分绕强轴失稳的试件发生了扭转现象;长细比较大的构件易发生弹性失稳,长细比较小的构件易发生弹塑性失稳;试验数据高于欧洲钢结构规范计算结果,欧洲规范的设计曲线较为保守;试验结果整体低于GB 50017—2003规范的设计曲线,该规范不再适用于不锈钢构件的稳定承载力计算。
[Abstract]:In order to study the overall stability of axial compression members of duplex stainless steel materials, The axial compression tests were carried out on 11 specimens of welded I-section columns of EN1.4462 duplex stainless steel. According to the initial bending of the specimens measured before the test and the initial eccentricity of the loads measured during the test, The instability mode and overall stability bearing capacity of this type of member are analyzed. The calculated results of the test data are compared with those of the steel structure design code en 1993-1-4 and GB50017-2003. The results show that all the specimens show overall instability. Among them, 5 specimens have strong axial instability mode and 6 specimens have weak axial instability mode, and no local buckling of plates occurs, and torsion occurs in some specimens with instability around the strong axis, and elastic instability is easy to occur for members with large length and fineness. The elastic-plastic instability is easy to occur in the members with small length, the test data is higher than the calculated results of the European Code for Steel structures, and the design curve of the European Code is conservative, and the test results are lower than the design curves of GB 50017-2003 Code. The code is no longer applicable to the calculation of the stability bearing capacity of stainless steel members.
【作者单位】：北京工业大学建筑工程学院;北京交通大学土木建筑工程学院;清华大学土木工程系;
【基金】：国家自然科学基金项目(51108007) 中国博士后科学基金特别项目(2014T70020)
【分类号】：TU392.1

【参考文献】