集簇式弹性连接组合梁桥的力学性能分析  

Mechanical properties analysis of composite beam bridge with cluster elastic connectors

作　　者：陈祺[1] 周叮[1] 刘朵[2] 张建东[3] 

机构地区：[1]南京工业大学土木工程学院,南京211816 [2]河海大学土木与交通学院,南京210098 [3]江苏省交通科学研究院,南京211112

出　　处：《应用力学学报》2018年第1期211-217,共7页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金(51478107);江苏省属高校自然科学研究重大项目(12KJA580002);江苏省交通运输科技项目(2014Y01)

摘　　要：基于二维弹性力学理论,将简支组合梁桥结构简化为层合的平面应力问题,用集中力替代集簇式弹性连接件提供的纵向作用力,根据桥梁表面的受力条件及界面处应力和位移的衔接条件,得到了组合梁桥的应力、位移分布函数。该计算方法收敛性较好且精度较高。参数化分析表明:桥梁跨中挠度和正应力随簇钉间距的增大而增大,但随簇钉刚度的增大而减小;当混凝土全部受压且钢梁全部受拉时簇钉承受的剪力值最大,建议簇钉刚度为104k N/mm,簇钉间距为0.5m^1.0m。计算结果为组合梁桥的科学设计提供了参考依据。Based on the theory of elasticity, the composite beam bridge structure is simplified to the laminated plane stress problem. The longitudinal forces of the cluster elastic connectors are described by the concentrated forces. According to the condition of surface loads and the condition of interfacial stress and displacement consistency, the stress and displacement distributions of composite simply supported beam bridge with cluster elastic connectors under loads are obtained. The results show that the present method has excellent convergence and high precision. Through the parameterized analysis, it is shown that the mid-span deflection and the normal stress of the bridge increase with the increase of the spacing distance of the clustered connectors, however, decrease with the increase of the rigidity. When the concrete is fully pressed and the steel is fully tensioned, the shears of cluster studs reach their largest values. The scope of optimal stiffness and spacing values of the cluster studs are proposed, which provides a valuable reference for scientific design of composite beam bridges.

关 键 词：组合梁桥 集簇式剪力键 弹性力学解 弹性连接 平面应力问题 

分 类 号：U448.216[建筑科学—桥梁与隧道工程]