葵花拱桥拱上填料模拟方法研究

Research on Simulation Method of Vault Filling of Sunflower Arch Bridge

拱桥作为一种传统的桥型,因具有良好的受力性能在世界各地广泛应用。拱上填料如何在电算程序中既便捷又准确地模拟,一直是桥梁设计行业中存在争议的话题。以开化县芹江大桥老桥的桥梁为例,提供了土柱+虚拟梁法和变截面连续梁法两种模拟方法,通过在相同条件下进行建模分析,对比了在恒载作用下和在恒载+汽车荷载+人群荷载作用下桥梁墩台的反力与典型截面内力,分析了两种模拟方法下计算结果的差异,供相关从业者参考。

As a traditional bridge type,arch bridge is widely used in the world because of its excellent mechanical performance.How to simulate the vault filling conveniently and accurately in the computer program is always a controversial topic in the bridge design industry.Taking Qinjiang River Bridge of Kaihua County as an example,two simulation methods of soil column+virtual beam method and variable cross-section continuous beam method are provided.By modeling analysis under the same conditions,the reaction force and the typical section internal force of bridge pier and abutment under the constant load and the constant load+automobile+crowd load are compared.The differences of calculation results by two simulation methods are analyzed,which give some references for the relevant practitioners.