某跨海大桥钢箱梁临时存放过程中破坏机理分析及加固措施研究  

Damage Mechanism Analysis for Steel Box Girder of a Sea-Crossing Bridge During Temporary Storage Process and Strengthening Measures

作　　者：严仁章 朱美豪[1,2] 王帅 周建庭[1,2] 刘小渝 YAN Ren-zhang;ZHU Mei-hao;WANG Shuai;ZHOU Jian-ting;LIU Xiao-yu(State Key Laboratory of the Mountainous Bridge and Tunnel Engineering, Chongqing 400074, China;School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China;Chongqing Aerospace Polytechnic, Chongqing 400021, China)

机构地区：[1]省部共建山区桥梁及隧道工程国家重点实验室,重庆400074 [2]重庆交通大学土木工程学院,重庆400074 [3]重庆航天职业技术学院,重庆400021

出　　处：《世界桥梁》2019年第4期80-85,共6页World Bridges

基　　金：国家自然科学基金青年基金项目(51708067);中国博士后科学基金面上资助项目(2017M612921);重庆市博士后科研项目特别资助项目(Xm2016127)

摘　　要：针对薄壁钢箱梁临时存放过程中产生的局部变形破坏,以某跨海大桥钢箱梁临时存放过程中产生的局部变形为背景,采用现场检测、有限元法与理论分析相结合的方式研究破坏产生的原因,并提出可靠的局部变形修复方案。结果表明:钢箱梁发生局部变形破坏的主要原因为支座位置设置不当,其引起的变形主要集中在支座范围内;提出采用梁端多点支撑、局部增强横隔板支撑,局部割除、更换变形部件的修复措施,实现了钢箱梁临时存放引起的局部变形破坏修复,修复效果较好。The thin-walled steel box girder is possible to experience local deformation during the storage process. In light of this problem, the local deformation in the steel box girder of a sea-crossing bridge during the temporary storage process was taken as the study background. The field testing, finite element method and theoretical analysis were used to study the causes of the damage and work out the reliable remedial scheme to the local deformation. The results show that the improper locations of the bearings are the main cause of the local deformation damage in the steel box girder, and the deformation mainly occur within the range of bearings. The measures taken to treat the deformation include creating multi-point support at the ends of the girder, locally strengthening the support from diaphragms, and locally cutting or replacing the deformed components. The local deformation damage occurring during the temporary storage was remedied, and the remedial effect was good.

关 键 词：钢箱梁 临时存放 局部变形 现场检测 有限元法 修复措施 

分 类 号：U445.71[建筑科学—桥梁与隧道工程] U448.213[交通运输工程—道路与铁道工程]