研究目的:钢混组合梁的剪力连接件对于钢梁与混凝土桥面板的协同工作起到了关键性的作用，使得钢与混凝土能够充分发挥各自的材料特性。由于公路桥梁规范中没有针对钢混组合梁剪力连接件的计算规定，其他现有规范、论著或国家标准中对钢混组合梁剪力连接件的计算又各有不同，因此有必要对公路钢混组合梁桥剪力连接件的计算方法展开探讨。
研究结论:针对多种规范、论著对比分析了栓钉剪力连接件的承载力计算，并得出结论:(1)《钢结构设计规范》与《EC4》计算方法相似，未考虑疲劳、裂缝等，为最低配置数量;(2)《钢桥》(小西一郎)中的计算公式结果较为保守，但能更好的控制栓钉的疲劳、界面滑移等问题，有更好的耐久性;(3)《现代钢桥》(吴冲)与《钢桥》计算公式完全-致;(4)《铁路钢-混凝土结合梁设计规范》参照了《EC4》;(5)《钢-混凝土组合桥梁设计规范》类似《钢规》，分别考虑了栓钉剪断破坏及混凝土压碎破坏的两种情况，并考虑了群钉效应;(6)本研究可对钢混组合梁的剪力件设计提供一定的参考。
Research purposes: Shear connector of steel concrete composite beam is of critical importance for steel beam and concrete bridge deck to work together which makes full use of the material properties of steel and concrete. The standards of highway bridge have no instructions for calculation of shear connector of steel concrete composite beam and other available industry standards，books or national standards are all different from one another. Therefore, it is necessary to have a discussion on the calculation method of shear connector of highway bridges' steel concrete composite beam.
Research conclusions: Shear capacity of shear connector was calculated according to some standard. The conclusions are:(1)'Code for Design of Steel Structures' and 'EC4' are similar in calculation，either of which is not considering fatigue and crack. They provide a minimum number of shear connectors. (2)' Steel Bridges'(Onishi Ichiro) gives us a conservative method and takes fatigue and interface slip into account. This method provides a better durability. (3)'Modern Steel Bridges'(Wu Chong) calculates shear capacity in the same way as 'Steel Bridges'(Onishi Ichiro). (4)'Code for Design of Composite Steel and Concrete Railway Bridges' is a reference of 'EC4'. (5)'Code for Design of Composite Steel and Concrete Bridges' is similar as 'Code for Design of Steel Structures'. Furthermore，it considers stud shear failure，concrete crushing and group nail effect.(6)This research results provide a reference for the design of shear connector of steel concrete composite beam.
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