【作者】 陈健；

【导师】 何保康；

【作者基本信息】 西安建筑科技大学 ， 结构工程， 2004， 硕士

【摘要】 随着我国经济的飞速发展，钢结构冷弯薄壁型钢结构在建筑中应用越来越多，冷成型角钢构件是钢结构中的一类重要构件，它具有易安装和连接方便的优点广泛应用于塔结构、格构柱、桁架结构及支撑等结构。 本文运用非线性有限元法对冷成型单角钢的稳定性能进行了研究，分析了宽厚比对冷成型单角钢轴压杆稳定性能的影响，给出了等边冷弯角钢发生弯曲屈曲和弯扭屈曲的判断条件，根据ANSYS有限元的计算结果拟合出了冷成型单角钢轴压杆在发生弯曲屈曲以及在发生弯扭屈曲时的稳定系数公式，在此基础上得出了冷成型单角钢轴压杆在所有长细比情况下的稳定系数公式。将ANSYS有限元的计算结果与实验值做了比较，此外还将ANSYS有限元的拟合公式与现行规范(GB50018—2002)设计公式的计算结果做了比较，指出了现行规范关于冷成型单角钢轴压杆设计的不妥之处，论文对现行规范提出了改进建议。更多还原

【Abstract】 With the rapid development in Chinese economy,the steel structure and thin-walled colded-formed steel structures have been widely used in building constructions. The colded-formed angle members are one of important member in steel structures and are widely used in transmission towers,trusses and bracing members by its easy connection and erection.In this paper ,the buckling behavior of cold-formed angle members is studied by non-linear finite element method.The influence of the width-thickness ratio of the single cold-formed angle column under axial load is analysed. The criteria of flexural buckling and torsional-flexural buckling for cold-formed egual-leg under axial loads is presented. According the calculating results of the ANSYS finite element method, the stability-coefficient formulas are simulated for the cold-formed loading single angle members of flexural buckling and torsional-flexural buckling. The calculation results of ANSYS finite element method are compared with the experimental values and also compared with the results of the design-formulas in the Current China Specification GB50018-2002 and the unreasonable items in the specification GB50018-2002 about the axial load cold-formed angle members are pointed out and suggestion for improving the specification GB50018-2002 are also presented in this paper.更多还原