T型截面螺旋板的翼缘影响研究

Analysis on Influence of Flanges of T-Shaped Section's Helical Plate

螺旋楼梯是空间螺旋板结构 ,其截面常设计成T型截面 ,计算时按空间梁方法进行分析 ,通常不考虑翼缘对计算结果的影响 本文利用螺旋板单元分析了两端固定约束的螺旋板的T型截面翼缘影响 与空间梁的结果比较表明 ,目前所流行的不计翼缘刚度影响的空间梁方法控制螺旋板截面设计是不甚合理的 ,因为其设计控制截面最小的计算误差也大于 10 % 。

Generally,the helical stairs with T-shaped section are taken as space beam by neglecting the influence of the flanges.A numerical calculation for T-shaped section stair is given by means of helical plate element,and the influence of flange is analyzed.The result indicates that the flange influence shall be considered compared with the space beam theory