【摘要】 对不锈钢方矩管截面的平面内稳定承载力进行研究,对两种不同截面,两端铰接的方矩管压弯构件进行数值模拟,在有限元模型中考虑了不锈钢非线性本构关系,冷加工效应和构件的初始缺陷,并与已有的试验数据进行对比,结果验证了有限元模型的准确性。在此基础上,拟合出了适应于工程中常用不锈钢压弯构件截面和长细比的下限相关曲线公式以及计算不锈钢方矩管压弯构件平面内稳定承载力的线性相关算式。为了便于实际应用,该式在形式上与我国GB 50017—2003《钢结构设计规范》保持一致。更多还原

【Abstract】 It was studied the in-plane stability capacity of rectangular hollow section( RHS) stainless steel members,based on numerical simulations of single span members of 2 different section types subjected to axial compression and bending. The stainless steel’s nonlinear constitutive relation,cold-formed effect and initial geometrical imperfection of the members were considered in the finite element models. The theoretical predictions were verified by comparison with experimental results. On the basis of these numerical results,lower limit correlation curves suitable for the sections and slenderness ratios and linear interaction expression often used for checking the in-plane stability of RHS beam-columns in actual projects were proposed. The forms of the proposed expressions should be in line with Code for Design of the Steel Structures( GB 50017—2003) for convenience in actual uses.更多还原