下穿混凝土板拱桥通道关键性力学性能分析  

Analysis of Key Mechanical Properties of Underpass Concrete Plate Arch Bridge Channel

作　　者：李玲英 王帆 李遥玉 LI Ling-ying;WANG Fan;LI Yao-yu(Kunming Municipal Engineering Design and Research Institute(Group)Co.,Ltd.,Kunming 650000,China)

机构地区：[1]昆明市政工程设计研究院(集团)有限公司,昆明650000

出　　处：《价值工程》2023年第13期74-76,共3页Value Engineering

摘　　要：城市下穿通道作为城市建设中一种常见的解决交叉口拥堵问题的手段,一般在下穿道路时设计较多,但对于下穿跨越河道的桥梁时,通道结构与上部的基础如何考虑,以及共用节点处的受力,相关的分析较少,因此有必要对其关键部位的力学性能进行分析。本文以昆明某下穿混凝土板拱桥的通道为例,其上部是景观河道以及一座3×20m的钢筋混凝土板拱桥。通过有限元软件对其进行关键节点的受力分析,以及对通道的在地震作用下的弯矩进行验算,以保证其安全性。拟对其他类似工程提供参考。Urban underpass,as a common means of solving intersection congestion problems in urban construction,is generally designed more often when underpass roads.However,for bridges crossing river channels,there is relatively little analysis on how to consider the structure of the underpass and the upper foundation,as well as the stress at shared nodes.Therefore,it is necessary to analyze the mechanical properties of its key parts.This article takes the passage of a concrete slab arch bridge in Kunming as an example,with the upper part being a landscape river channel and a 3×20m reinforced concrete slab arch bridge.Stress analysis on key nodes is performed through finite element software,and the bending moment of the channel under earthquake action is verified to ensure its safety.It is expected to provide reference for other similar projects.

关 键 词：下穿通道 板拱桥 力学性能 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]