摘要
为研究曲线槽型梁刚构桥转体T构的稳定性,并探讨该类桥梁简单实用的结构计算方法,以半径为580 m的铁路曲线槽型梁刚构桥为研究对象,采用Midas/FEA有限元分析软件建立不同支座偏心距的曲线槽型梁转体T构模型,对主梁根部截面的弯矩、应力和梁端位移进行计算,并对单梁、梁格和实体模型在结构计算中的适用性进行对比分析。结果表明:设置合理的支座偏心距可有效减小主梁根部截面的弯矩、应力和梁端位移,显著提高转体T构的稳定性;梁格模型能够较好地反映曲线槽型梁刚构桥的变形和应力状态,可作为曲线槽型梁刚构桥结构的实用计算方法。
In order to study the stability of swivel T-structure of the curved rigid frame bridge and discuss the simple and practical structural calculation method of this type of bridges,a railway curved slot beam rigid frame bridge with a radius of 580-meters was used researched.The swivel T-structure models with different bearing eccentricities were established by Midas/FEA finite element analysis software.The bending moments,stresses and beam end displacements of the root section of the main beam were calculated and analyzed.The applicability of single beam,grid and entity model in structural calculation is comparatively analyzed.The results show that:setting reasonable bearing eccentricity can effectively reduce the bending moment,stress and beam end displacement so that the stability of the swivel T-structure was greatly increased;The grillage model can better reflect the deformation and stress state and is a practical calculation method for the structural calculation of the similar bridges.
作者
王海雷
张宗辉
夏晓亮
Wang Hailei;Zhang Zonghui;Xia Xiaoliang(China Railway Bridge&Tunnel Technology Co.,Ltd.,Nanjing 210061,China;Ningbo Hangzhou Bay Bridge Development Co.,Ltd.,Ningbo 315327,China)
出处
《市政技术》
2021年第2期54-58,共5页
Journal of Municipal Technology
关键词
曲线槽型梁
转体T构
稳定性
计算模型
梁格模型
curved slot beam
swivel T-structure
stability
calculation model
grillage model
