深水施工钢栈桥安全性分析及结构优化  

Safety Analysis and Structural Optimization of Steel Trestle Bridge in Deep Water Construction

作　　者：焦驰宇[1,2] 曹世琦 卢长炯 赵福元 JIAO Chiyu;CAO Shiqi;LU Changjiong;ZHAO Fuyuan(Beijing Higher Institution Engineering Research Center of Civil Engineering Structure and Renewable Material,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Multi-functional Shaking Tables Laboratory,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Municipal Sixth Construction Engineering Co.,Ltd.,Beijing 100023,China)

机构地区：[1]北京建筑大学工程结构与新材料北京市高等学校工程研究中心,北京100044 [2]北京建筑大学未来城市设计高精尖创新中心,北京100044 [3]北京建筑大学大型多功能振动台阵实验室,北京100044 [4]北京市市政六建设工程有限公司,北京100023

出　　处：《施工技术(中英文)》2025年第6期24-30,115,共8页Construction Technology

基　　金：北京市属高校基本科研业务费项目(X20094)。

摘　　要：钢栈桥由于构件繁多、连接方式复杂,其安全问题尤为突出。以某跨河大桥为工程背景,运用有限元方法对其中的主栈桥与支栈桥力学性能进行了研究,分析了钢栈桥的应力状态、整体稳定性及钢管桩的局部稳定性,并进行了方案优化。研究表明:尽管主栈桥与支栈桥结构形式类似,但由于其与河道相对位置关系不同,与主栈桥相比,水流力增加了支栈桥的最大应力;贝雷梁支点处的竖杆是最大应力构件,也是最先屈服的构件,应重点关注;本工程中钢管桩并不会发生局部屈曲。The safety problem of steel trestle bridge is particularly prominent because of its many components and complex connection modes.Based on the engineering background of a river bridge,the main trestle bridge and branch trestle bridge are studied by the finite element method.The stress state,the global stability of the steel trestle bridge and the local stability of the steel pipe pile are analyzed,and the scheme is optimized.The results show that although the structure of the main trestle bridge is similar to that of the branch trestle bridge,due to the different relative position between the trestle bridge and the river,the flow force increases the maximum stress of the branch trestle bridge.The vertical bar at the basement point of the Bailey beam is both the member with the greatest stress and the member with the first yield,so attention should be paid to it.In this case,the steel pipe pile will not have local buckling.

关 键 词：桥梁 钢栈桥 涉水施工 数值模拟 局部分析 优化 

分 类 号：U448[建筑科学—桥梁与隧道工程]