高速铁路混凝土连续曲线梁桥在ZK竖向静活载作用下的曲线半径变化对梁体扭转的影响  

The Effect of the Change of Curve Radius of High-Speed Railway Continuous Concrete Curved Bridges on the Torsion of Beam Body Under the Vertical Static and Live Load of ZK

作　　者：何林焜 曾理勇 吴凯 HE Lin-kun;ZENG Li-yong;WU Kai(China Railway Southwest Research InstituteCo.Ltd.,Chengdu 611731,China)

机构地区：[1]中铁西南科学研究院有限公司,成都611731

出　　处：《工程建设与设计》2019年第1期164-166,共3页Construction & Design for Engineering

摘　　要：随着高速铁路列车速度越来越快,其在通过曲线桥梁时离心趋势也越来越强,因而通常会使外侧梁超载、内侧梁卸载,内外侧梁受力不均,产生较大的扭矩,因此曲线半径的设置显得越来越重要。论文以双线(44+72+44)m的高速铁路预应力混凝土连续曲线梁桥为例,在分析过程中运用Midas/Civl有限元分析软件,建立5种连续曲线梁桥的梁格模型,研究曲线半径变化对其梁体扭转的影响及变化关系,并得出结论。With the increasing speed of high-speed railway trains, the centrifugal tendency of trains passing through curved Bridges becomes stronger and stronger, as a result, the outer beam is usually overloaded, the inner beam is unloaded, and the inner and outer beam are subjected to uneven forces, resulting in greater torque. Therefore, the setting of the curve radius becomes more and more important. In this paper, taking(44+72+44) m high-speed railway prestressed continuous concrete curved bridge as an example, using Midas/Civl finite element analysis software in the analysis process, and building 5 kinds of beam grillage modle of continuous curved beam bridge to research the influence of curve radius on torsion of beam and its relationship, and draw a conclusion.

关 键 词：曲线梁桥 ZK竖向静活载 曲线半径 梁体扭转角 

分 类 号：U448.13[建筑科学—桥梁与隧道工程] U448.215[交通运输工程—道路与铁道工程]