论文部分内容阅读
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。
In order to study the overall stability of bi-phase stainless steel axial compression members, 11 EN 1.4462 dual-phase stainless steel I-section specimens were subjected to axial compression test. According to the initial bending of the specimen and the initial eccentricity of the load measured during the test, the instability mode and the overall stability bearing capacity of the component are analyzed. The calculated results are in good agreement with those of the current European steels Structural design specifications EN 1993-1-4 and GB 50017-2003 “Design Code for Steel Structures,” the results were compared. The results show that all the specimens show the overall instability, of which five specimens are the strong axis instability mode, the six specimens are the weak axis instability mode, partial buckling of the plate does not occur, and some of the specimens around the strong axis instability The torsion phenomenon occurred in the specimen. The member with larger slenderness was prone to elastic instability and the member with smaller slenderness was prone to elastoplastic instability. The experimental data were higher than those calculated by the European steel structure code. The design curve of the European norm was more conservative ; The overall test results are lower than the design curve of GB 50017-2003, which is no longer applicable to the calculation of the stable bearing capacity of stainless steel components.