基于有限元法的高速公路上中小跨径无缝桥梁技术应用研究  

Research on the Application of Seamless Bridge Technology for Small and Medium Spans on Highways Based on Finite Element Method

作　　者：李学良 丛林[1] 丁鹤洋 陆元春 傅梅 LI Xueliang;CONG Lin;DING Heyang;LU Yuanchun;FU Mei

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804 [2]上海市城市建设设计研究总院(集团)有限公司,上海200125

出　　处：《上海公路》2025年第1期71-79,M0005,共10页Shanghai Highways

摘　　要：为研究半整体式无伸缩装置桥梁技术在高速公路上的实际应用情况,结合相似气候、地质条件下的崇明北沿公路2座已建无缝桥梁的相关数据,以G318高速公路上的典型桥梁东大盈桥为应用场景,以温度场、台后填土摩阻因数等为关键参数,对桥头搭板模型进行了有限元仿真分析。研究结果表明,相较崇明无缝桥梁,东大盈桥的应力、位移等力学指标增幅较小,表明G318高速公路上的中小跨径桥梁可采用半整体式无伸缩装置的桥梁结构形式,且效果良好。课题可为无缝桥梁技术应用的可行性研究及后续搭板设计提供数据基础和理论支撑。In order to study the practical application of semi-integral jointless bridge technology on highways,combined with relevant data of two seamless bridges built along the Chongming North Highway under similar climate and geological conditions,taking the typical bridge Dongdaying Bridge on G318 highway as the application scenario,and using temperature field,backfill soil friction factor and other key parameters,finite element simulation analysis was carried out on the bridge approach slab model.The research results show that compared with the seamless bridge in Chongming,the mechanical indicators such as stress and displacement of Dongdaying Bridge have a smaller increase,indicating that the small and medium span bridges on G318 Expressway can adopt a semi integral bridge structure without expansion devices,and the effect is good.The project can provide data foundation and theoretical support for the feasibility study of seamless bridge technology application and subsequent slab design.

关 键 词：无缝桥梁技术 桥头搭板 有限元法 温度响应 中小跨径桥梁 

分 类 号：U44[建筑科学—桥梁与隧道工程]