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为给我国《不锈钢结构技术规范》中轴心受压柱弯曲屈曲稳定部分的编制提供依据,对国外已有的同类构件的设计方法和试验研究数据进行搜集和对比。结果表明:目前的欧洲不锈钢结构设计规范和美国冷成型不锈钢结构设计规范中计算该类构件的公式均存在一定不足。依据搜集到的199个方管、矩形管、圆管、椭圆管、焊接H形钢和冷弯C型钢截面柱的试验数据,根据冷弯效应及残余应力对轴心受压构件稳定性能的影响,将构件依据截面形式分为A、B、C三类,其中方管、矩形管和冷弯C型钢为A类,圆管和椭圆管为B类,焊接H形钢为C类,三类轴心受压稳定曲线均采用Perry公式形式表达。与试验数据对比表明:采用三类曲线能较好地估算构件的稳定承载力且离散性较小。对提出的计算式进行可靠度分析,结果表明其可靠度指标β满足我国GB 50068—2001《建筑结构可靠度设计统一标准》的要求。
In order to provide a basis for the preparation of the flexural buckling stability of the column under axial compression in China’s “Technical Specifications for Stainless Steel Structures”, the design methods and experimental research data of the existing similar components abroad were collected and compared. The results show that there are some shortcomings in the current formulas for the design of stainless steel structures in Europe and the specifications for the design of cold-formed stainless steel structures in the United States. Based on the collected experimental data of 199 square tubes, rectangular tubes, round tubes, oval tubes, welded H-beams and cold-formed C-section columns, the influence of cold-bending effect and residual stress on the stability of the axially- , The components are divided into three categories A, B and C according to the cross-sectional form. The square pipes, rectangular pipes and cold-formed C-shaped steels are Class A, the round pipes and oval pipes are Class B, the welded H-shaped steels are Class C, Axial compression stability curve are expressed using Perry formula. The comparison with the experimental data shows that the three kinds of curves can well estimate the stable bearing capacity and the discreteness of the members. The reliability analysis of the proposed formula shows that the reliability index β meets the requirements of GB 50068-2001 “Unified Design Standard for Reliability of Building Structures”.