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通过对比国内外现有不锈钢设计标准的变形计算方法,研究不锈钢受弯构件的残余变形性能。采用有限元分析法对不锈钢工字形和箱形受弯构件达到屈服强度时的残余变形进行分析,并研究材料性能、构件长细比及截面形式等因素的影响。结果表明:如果不考虑塑性发展系数,构件在承受M0.2的弯矩时产生的残余变形将普遍大于梁跨的1/1 000,甚至在一些情况下会超过梁跨的1/50。
By comparing the calculation methods of the existing stainless steel design standards at home and abroad, the residual deformation of stainless steel bending members was studied. Finite element analysis was used to analyze the residual deformation of stainless steel I-shaped and box-shaped flexural members when they reached yield strength, and the effects of factors such as material properties, component slenderness ratio, and cross-sectional form were investigated. The results show that if the plasticity development coefficient is not taken into account, the residual deformation of the component when subjected to a bending moment of M0.2 will generally be greater than 1/1000 of the beam span, and in some cases it will exceed 1/50 of the beam span.