摘要
以宝成铁路上某立交通道的简支空心板梁桥为工程背景,利用Midas FEA建立加固施工全过程有限元模型,考虑混凝土的材料非线性,计算得到了简支空心板梁桥加固前后及加固过程中关键施工阶段的结构受力,对比分析了简支空心板梁桥加固前后的结构变形、应力、裂缝宽度,同时讨论了顶升对加固效果的影响。计算结果表明:简支空心板梁桥粘贴钢板加固后,结构挠度、应力、裂缝宽度及钢筋应力均有一定幅度下降,但降低幅度较小;建议在粘贴钢板前对简支空心板梁桥进行顶升,增加钢板协同受力的程度,提高加固效果。
Taking a simply-supported hollow-slab girder bridge of an interchange lane on the Baocheng Railway as the engineering background,the Midas FEA was used to establish a finite element model for the whole process of reinforcement construction.Considering the material nonlinearity of concrete,the structural forces of the simply-supported hollow-slab girder bridge before and after reinforcement and the key construction stages in the reinforcement process were calculated.The structural deformation,stress and crack width of the simply-supported hollow-slab girder bridge before and after reinforcement were compared and analyzed,and the effect of jacking on the reinforcement effect was also discussed.The results show that the structural deflection,stress,crack width and reinforcement stress are reduced to a certain extent after the reinforcement of simply-supported hollow-slab girder bridge with steel plates,but the reduction is small.It is suggested to lift the simply-supported hollow-slab girder bridge before the reinforcement of steel plates to increase the degree of synergistic stress of steel plates and improve the reinforcement effect.
作者
唐杨
张倩萍
王大为
王勇
王国炜
TANG Yang;ZHANG Qianping;WANG Dawei;WANG Yong;WANG Guowei(Countryside Highway Administration Bureau of Wufeng Tujia Autonomous County,Yichang 443413,China;Guangxi Traffic Construction Engineering Testing Consulting Co.,Ltd.,Nanning 530024,China;Wenzhou Traffic Planning and Design Institute,Wenzhou 325000,China;Jinan Traffic Engineering Quality and Safety Center,Jinan 250014,China;Shandong Jinqu Design Consulting Group Co.,Ltd.,Jinan 250014,China)
出处
《宁夏工程技术》
CAS
2023年第1期62-68,共7页
Ningxia Engineering Technology
关键词
公路桥梁
空心板梁桥
粘贴钢板加固
材料非线性
有限元分析
highway bridge
hollow-slab girder bridge
bonded steel plate reinforcement
material nonlinearity
finite ele⁃ment analysis
