某高速公路M型门式墩的设计研究  

Design of M-type portal pier for highway

作　　者：洪一樽 HONG Yizun(Guiyang Filiale of China Railway Eryuan Engineering Group Co.Ltd.,Guiyang 550002,China)

机构地区：[1]中铁二院贵阳公司,贵州贵阳550002

出　　处：《贵州科学》2025年第1期90-93,共4页Guizhou Science

摘　　要：以某高速公路跨越市政道路的桥梁为设计背景,通过建立空间有限元模型,对比分析了M型门式墩两个边墩刚性连接与释放约束两种情况的内力状况,得出在墩高较矮的情况下,温度变化对刚性连接体系的影响非常大,释放边墩墩顶约束可以大大改善边墩墩底内力状况,从而可减小结构尺寸,降低工程造价;同时指出在上部结构荷载较大时,设计中应该结合具体施工顺序,模拟桥墩在各阶段的应力状况,从而确定横梁钢束张拉顺序。研究结果可为今后同类M型门式墩提供一定的借鉴和参考意义。Targeting on the design of a highway bridge over a municipal road,a finite element model was established to compare and analyze the internal forces between two side piers of the M-type portal pier under rigid connection and release constraint conditions.It is concluded that the temperature change has a great influence on the rigid connection system when the height of the pier is low,and releasing the top constraint of the side piers can greatly improve the internal force conditions at the bottom of the side piers.Thus,the structure size and engineering cost can be reduced.It is pointed out that when the superstructure load is large,the stress conditions of the piers at each stage should be simulated according to the construction sequence,so as to determine the tension sequence of the beam steel bundle.The research results can provide reference for the design of similar M-type portal piers.

关 键 词：门式墩 超静定 分批张拉 温度 对比分析 

分 类 号：U443.2[建筑科学—桥梁与隧道工程]