【摘要】 某幼儿园连廊支撑柱为等边三角形排布的三根钢管混凝土柱,柱高范围内无拉接,柱顶部由钢箱梁连接。本文采用通用有限元软件ABAQUS,选择合理的材料本构关系、单元模型,建立有限元分析模型。对单根钢管柱、单根钢管混凝土柱、三根钢管混凝土柱及整体连廊模型进行线性屈曲分析并和经典理论公式比较以验证模型的正确性,然后进行考虑初始缺陷及材料非线性的非线性屈曲分析,从而得出三根钢管混凝土柱的合理计算长度系数。更多还原

【Abstract】 The supporting column of a kindergarten corridor is a three concretefilled steel tube(CFST) columns arranged in an equilateral triangle, with no connection within the height range of the column. The top of the column is connected by a steel box beam. This article adopts the general finite element software ABAQUS, selects reasonable material constitutive relationships and element models, and establishes a finite element analysis model. The linear buckling analysis of the single steel tubular column, single concrete filled steel tubular column, three concrete filled steel tubular columns and the whole corridor model is compared with the classical theoretical formula to verify the correctness of the model. and then the nonlinear buckling analysis considering the initial defects and material nonlinearity is carried out to obtain the reasonable calculated length coefficient of three concrete filled steel tubular columns.更多还原