装配组合钢箱梁桥负弯矩区结合部受力性能研究
发布时间：2018-08-07 09:32
【摘要】：为降低装配式组合钢箱梁桥结构体系转换时中支座处结合部的施工难度,提出一种钢-混凝土结合部的构造形式。应用有限元分析软件ANSYS,通过对某4跨连续梁桥的模拟计算,揭示了结合部各构件传力比例及钢-混凝土界面滑移机理。进一步变化连接件布置形式及抗剪刚度,研究不同参数对结合部受力性能的影响。结果表明,结合部通过桥面板及内插开孔钢板的纵向力传递支点负弯矩,隔板焊钉及内填充混凝土传递竖向支反力;随着连接件布置方式及抗剪刚度的变化,不同参数对隔板焊钉受力影响较大,对其余构件基本无影响;结合部混凝土绝大部分主拉应力低于2.1 MPa,焊钉最大剪力为12.6 k N,钢-混凝土结合面最大滑移为0.06 mm,结合部构造形式安全、合理。
[Abstract]:In order to reduce the construction difficulty of the junction at the middle support of the assembled composite steel box girder bridge during the structural system transformation, a structural form of the steel-concrete joint is proposed. By using the finite element analysis software ANSYSand the simulation calculation of a 4-span continuous beam bridge, the force transfer ratio of each member in the joint and the slip mechanism of the steel-concrete interface are revealed. The influence of different parameters on the mechanical properties of the joint was studied by changing the joint layout and shear stiffness. The results show that the longitudinal force of the joint is transmitted by the longitudinal force of the bridge deck and the steel plate with inserted holes, and the negative bending moment is transmitted by the longitudinal force of the steel plate, and the vertical support reaction is transmitted by the welded nail and the inner filled concrete, and with the change of the arrangement of the connection and the shear stiffness, Different parameters have great influence on the force of the welded nail, but have no effect on the rest of the components. Most of the main tensile stress of the combined concrete is less than 2.1 MPA, the maximum shear force of the welded nail is 12.6kN, and the maximum slip of the steel-concrete joint is 0.06 mm. The structure of the joint is safe and reasonable.
【作者单位】： 同济大学桥梁工程系;
【分类号】：U441
[Abstract]:In order to reduce the construction difficulty of the junction at the middle support of the assembled composite steel box girder bridge during the structural system transformation, a structural form of the steel-concrete joint is proposed. By using the finite element analysis software ANSYSand the simulation calculation of a 4-span continuous beam bridge, the force transfer ratio of each member in the joint and the slip mechanism of the steel-concrete interface are revealed. The influence of different parameters on the mechanical properties of the joint was studied by changing the joint layout and shear stiffness. The results show that the longitudinal force of the joint is transmitted by the longitudinal force of the bridge deck and the steel plate with inserted holes, and the negative bending moment is transmitted by the longitudinal force of the steel plate, and the vertical support reaction is transmitted by the welded nail and the inner filled concrete, and with the change of the arrangement of the connection and the shear stiffness, Different parameters have great influence on the force of the welded nail, but have no effect on the rest of the components. Most of the main tensile stress of the combined concrete is less than 2.1 MPA, the maximum shear force of the welded nail is 12.6kN, and the maximum slip of the steel-concrete joint is 0.06 mm. The structure of the joint is safe and reasonable.
【作者单位】： 同济大学桥梁工程系;
【分类号】：U441
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