基于湿接缝应力控制的横隔梁设计方法研究  

Research on the design method of bridge diaphragms based on wet joint stress control

作　　者：彭卫兵[1] 王智越 林帮军 黄晨露 徐静敏 PENG Weibing;WANG Zhiyue;LIN Bangjun;HUANG Chenlu;XU Jingmin(School of Civil Engineering,Zhejiang University of Technology,Hangzhou 310014,China;Wenzhou Taishun County Transportation Bureau,Wenzhou 325500,China)

机构地区：[1]浙江工业大学土木工程学院,杭州310014 [2]温州市泰顺县交通运输局,温州325500

出　　处：《东南大学学报(自然科学版)》2025年第2期452-458,共7页Journal of Southeast University:Natural Science Edition

基　　金：国家自然科学基金资助项目(52278227).

摘　　要：传统横隔梁设置常考虑对主梁横向荷载分布的影响,却忽略梁间湿接缝受力,且横向荷载分布效应无法成为设置横隔梁的直接依据。以典型25~40 m的装配式T梁桥为研究对象,提出了一种考虑湿接缝空间受力状态的横隔梁设计准则,并通过精细化三维有限元分析进行验证,系统研究横隔梁的布置方式与湿接缝受力性能之间的关系;进一步探讨了横隔梁数量及位置对湿接缝在运营期内受力性能的影响。结果表明:在车道荷载作用下,相对于主梁受力,湿接缝的峰值应力对横隔梁的设计起控制性作用;横隔梁的设置可以有效降低湿接缝的应力,当桥梁跨径L在25~40 m时,至少需在跨中布置一道横隔梁;此外,跨中横隔梁对降低湿接缝应力的效果优于L/4和3L/4位置的横隔梁。The traditional diaphragm layout focuses on the transverse load distribution of main girders while overlooking the stress behavior of wet joints between girders.Moreover,transverse load distribution effect cannot serve as a direct basis for diaphragm placement.Taking typical prefabricated T‑beam bridges with spans of 25 to 40 m as research objects,a diaphragm design criterion that accounts for the spatial stress state of wet joints was proposed.The criterion was validated through detailed three‑dimensional finite element analysis.A systematic investigation of the relationship between diaphragm arrangement and wet joint stress performance was conducted.Additionally,the influence of diaphragm quantity and position on wet joint stress behavior during the service period was explored.Results indicate that under lane load,compared with the stress in the main girders,the peak stress in wet joints exerts a controlling influence on diaphragm design.The installation of diaphragms can effectively reduce the stress at wet joints.For bridge spans L ranging from 25 to 40 m,at least one diaphragm should be placed at mid‑span.Furthermore,placing a diaphragm at mid‑span is more effective in reducing wet joint stress than positioning it at L/4 or 3L/4.

关 键 词：桥梁工程 横隔梁 湿接缝 有限元分析 

分 类 号：U443.32[建筑科学—桥梁与隧道工程]