空心板梁桥横向刚度对主梁受力性能影响分析  

Analysis on Influence of Transverse Stiffness of Hollow Slab Beam Bridge on Mechanical Performance of Main Beam

作　　者：刘永超 Liu Yongchao(Liaoning Provincial Transportation Planning and Design Institute Co.,Ltd.,Shenyang 110166,China)

机构地区：[1]辽宁省交通规划设计院有限责任公司,沈阳市110166

出　　处：《北方交通》2021年第11期44-47,共4页Northern Communications

摘　　要：空心板梁桥结构形式简单、便于施工,在中小跨径桥梁中被广泛应用。预制主梁之间的铰缝是薄弱部位,容易先破坏,降低横向刚度,导致单板受力过大,影响桥梁使用寿命,威胁行车安全。利用有限元方法建立预制空心板梁桥上部结构梁格模型,首先分析了单一铰缝不同破坏程度对主梁受力性能的影响,进而研究不同部位铰缝破坏对主梁受力性能的影响,为类似桥梁现场检测工作提供定性判断参考,同时也为承载能力评定提供分析方法。The hollow slab beam bridge is widely used in bridges with medium and small spans because of its simple structure type and convenient construction.The hinge joint between precast main beams is a weak part,which is easy to be damaged first and reduce the transverse stiffness,resulting in excessive stress on the single plate,affecting the service life of the bridge and threatening the driving safety.The beam lattice model of the superstructure of precast hollow slab beam bridge is established by using the finite element method.Firstly,the influence of different failure degrees of a single hinge joint on the mechanical performance of the main beam is analyzed,and then the influence of the failure of hinge joints at different parts on the mechanical performance of the main beam is studied,which can not only provide a qualitative judgment reference for the field detection of similar bridges,but also provide an analysis method for the evaluation of bearing capacity.

关 键 词：空心板梁桥 铰缝 横向刚度 受力性能 

分 类 号：U441[建筑科学—桥梁与隧道工程]