型钢组合梁梁端构造连接性能试验与优化设计研究

Research on Experimental and Optimal Design for the Structural Connection Performance of Profile Steel Composite Beam End

为解决组合梁梁端钢与混凝土连接性能设计要求与梁端布置空间局促之间的矛盾,避免型钢梁端锈蚀劣化等问题,提出现浇钢骨混凝土和剪力钉协同的组合梁梁端连接新型构造。为检验该种新型梁端构造连接力学性能,对基本还原依托工程桥梁梁端局部区域结构形式的子结构足尺模型开展试验研究,并针对试验研究和工程实践中发现的问题,探究型钢-混凝土组合梁梁端构造优化设计方法。

In order to solve the contradiction between the design requirements of the steel-concrete connection performance of the composite beam end and the limited spatial layout of the beam end and avoid problems such as corrosion and deterioration of the profile steel beam end and so on,a new type of composite beam end connection structure with the synergistic effect of pouring steel reinforced concrete and shear stud is put forward.In order to test the mechanical performance of this new type of structural connection of beam end,the experimental research is conducted on a full-scale substructure model that basically restores the local structural form of the engineering bridge beam end.In response to the problems found in the experimental research and engineering practice,the optimal design method for the beam end structure of steel-concrete composite beam is explored.