波形钢腹板自承重组合刚构桥施工过程分析  

Construction Process Analysis of the Composite Rigid Frame Bridge with Self⁃supporting Corrugated Steel Webs

作　　者：蔡昊初 王思豪 魏俊 刘玉擎[1] CAI Haochu;WANG Sihao;WEI Jun;LIU Yuqing(College of Civil Engineering,Tongji University,Shanghai 200092,China;Zhejiang Institute of Communications,Hangzhou,Zhejiang 311112,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]浙江交通职业技术学院,浙江杭州311112

出　　处：《施工技术（中英文）》2023年第18期56-61,共6页Construction Technology

基　　金：浙江省交通运输厅科技项目(2019049)。

摘　　要：为了提高波形钢腹板组合梁桥建设的安全性及经济性,腹板自承重的悬臂浇筑逐步发展为该桥型特有的施工方法之一。针对波形钢腹板自承重施工方法,以跨径55m+100m+55m的葛溪大桥左线1号桥为背景,基于有限元分析获得了施工过程中各施工段的构件受力特点及腹板稳定性,根据分析结果在实桥受力关键部位布置测点,进行施工过程现场测试,验证了施工方法的适用性,并提出了相应的优化措施。研究结果表明:波形钢腹板自承重悬臂施工过程中,施工主体结构安全,应力分布合理;钢混过渡截面为钢及混凝土构件的受力关键位置,施工时应分别采取措施给予加强;临时横撑的布置可有效避免波形钢腹板发生整体倾覆,且为了提高安全系数,横撑应尽量靠近上、下翼缘板布置。In order to improve the safety and economics for the construction of composite girder bridges with corrugated steel webs,the cantilever casting method with the characteristic of self⁃supporting using corrugated steel webs is one of the particular ways.The No.1Bridge on the left line of Gexi Bridge with the span of 55m+100m+55m was taken as the research object.The stress distribution of different components and the stability of the corrugated steel webs in each segment during the construction process were analyzed by finite element analysis.Based on the analysis results,the measuring points were arranged in the key positions of the real bridge to carry out on⁃site testing in the construction process.The applicability of the construction method was verified and the corresponding optimization measures were proposed.The results show that the stress distribution of different components is reasonable and the web⁃self⁃supporting cantilever construction method is safe.The transition section is the key position of steel and concrete members,which can be appropriately strengthened during construction.The arrangement of temporary transverse braces can effectively avoid the lateral inclination of corrugated steel webs.Moreover,the transverse braces should be arranged as close as possible to the upper and lower steel flange plates.

关 键 词：桥梁工程 组合刚构桥 波形钢腹板 自承重 施工技术 测试 有限元分析 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]