广珠城际轨道实体桥墩设计分析

广珠城际轨道工程中铁路桥梁大量采用跨径为32 m的双箱单室简支梁,桥墩设计为花瓶式。由于桥墩结构尺寸较小,为保证工程的安全性,对采用该桥墩及相应基础后构成的双线简支梁桥进行动力分析,用脱轨系数、轮重减载率判断列车运行安全性,用Sperling指标判断乘坐舒适性,并利用空间有限元分析软件ANSYS对桥墩进行局部应力分析。分析结果表明:梁桥具有良好的动力特性及列车走行性,能够保证列车运行的安全性和乘坐舒适性;墩顶截面变宽段出现最大剪应力,墩顶操作空间倒角处出现最大主拉应力及正截面最大拉应力,最大主压应力出现在墩底截面,桥墩各项受力指标均能满足规范要求。

Design and Analysis of Solid Piers for Bridges on Guangzhou-Zhuhai Intercity Railway Transit

A large number of the 32-m span simply-supported single-cell and twin-box girders were used for the bridges on Guangzhou-Zhuhai Intercity Railway Transit and the piers for these bridges were designed as the flower vase piers.Because the structural dimensions of the piers were small and in order to ensure the safety of the bridges,the dynamic analysis was conducted for their piers and the corresponding foundations that in all formed the double-track simply-supported girder bridges.In the analysis,the deraili...