剪切变形对半刚接柱计算长度系数的影响

在考虑剪切变形半刚接钢框架柱计算长度系数修正的基础上,改变端板连接钢框架的截面厚度,得出随着端板厚度的增大柱计算长度系数不断减小的结论.通过算例可知端板厚度12mm与50mm的变化幅度内计算长度系数差值高达37.02%;与刚性连接钢框架计算结果对比,得出考虑剪切变形对柱计算长度系数有显著影响,二者最大相差66.78%.根据剪切变形的计算长度系数变化规律,拟合出相应的曲线,为工程结构设计提供了参考.

The Effect of Shearing Deformation on the Length Coefficient of the Semi-rigid Column

In considering the shearing deformation of length coefficient of the semi-rigid steel column calculated on the basis of the amendment,a conclusion is obtained that by changing the section thickness of the endplate connected to the steel framework,the column length coefficients are decreasing with the increase of the endplate thickness.Calculations show that when the thickness changes within the range between 12mm and 50mm,the difference of the coefficients reaches up to 37.02%.Compared with the rigid steel frame results,the shearing deformation has a significant effect on the length coefficients of the column,its maximum difference being 66.78%.According to the law of chang in the length coefficients affected by shearing deformation the corresponding curve,is drawn for the reference of engineering designing.