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
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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 seacrossing 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.
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 seacrossing 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.
引文
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[2]孙国光.港珠澳大桥多功能旋转吊具设计与应用技术[J].世界桥梁,2017,45(1):20-24.
[3]高星林,张劲文,戴建标,等.港珠澳大桥主体工程招标模式构建与实施[J].世界桥梁,2017,45(4):88-92.
[4]朴泷,周高明,吴小兵,等.港珠澳大桥浅水区非通航孔桥钢-混组合梁施工技术[J].桥梁建设,2016,46(2):13-18.
[5]孙国光.港珠澳大桥浅水区非通航孔桥埋置式承台止水方案比选[J].桥梁建设,2017,47(6):117-122.
[6]陶真林,曾成.单箱单室宽箱梁空间受力分析[J].公路与汽运,2015(15):25-26.
[7]许有胜.大跨变截面波形钢腹板箱梁桥横隔板设置[J].市政技术,2016,34(2):66-69.
[8]李宏江,叶见曙,万水.波形钢腹板箱梁横隔板间距的研究[J].公路交通科技,2013,21(3):21-25.
[9]鲍永方,黄文彬.矩形箱梁约束扭转理论的分析与比较[J].工程力学,2011,14(3):133-134.
[10]王立福,单欣.横隔板的设置对两端简支钢板箱形梁畸变的影响分析[J].工业建筑,2013,32(4):23-27.
[11]孙建国.桥梁横向分布系数计算方法的对比分析[J].内蒙古公路与运输,2013,34(6):12-18.
[12]刘华,叶见曙.桥梁荷载横向分布系数计算方法[J].交通运输工程学报,2015,24(3):23-25.
[13]张莉.横隔板及几何特征对钢箱梁畸变效应的影响[J].铁道工程学报,2013,179(4):23-25.