轨道交通槽型梁平面与空间受力分析比较

采用Midas/Civil和ABAQUS软件对重庆轨道交通#1线槽型梁进行平面和空间受力分析对比。结果表明:竖向荷载作用下,槽型梁空间受力行为明显,平面模型计算的挠度偏大;单线槽型梁采用两种模型得到的道床板纵向应力差别不大;槽型梁横向应力不可忽视,在某些截面横向应力甚至与纵向应力相当,必须采用空间模型进行详细分析;两种模型均能反映结构的一阶振型,但平面模型无法反映结构的局部弯曲和扭转振型。

Analysis on Plane Stress and Space Stress of U-shaped Beam of Rail Transit

Plane stress and space stress of U-shaped beam on No.1 Line of Chongqing Rail Transit are analyzed using Midas/Civil and ABAQUS software in this paper.The results show that under vertical loads,space stress of U-shaped beam is obvious and the deflection of plane stress is larger.The longitudinal stress of single-line U-shaped beam from these two models is of little difference.Transversal stress can not be ignored for it is even equal to longitudinal stress in some cross sections,so it shall be detailed anal...