(1 湘潭大学土木工程与力学学院， 湘潭 411105；  2 华侨大学土木工程学院， 厦门 361021)

［摘要］为实现钢-混凝土组合楼盖和组合桥梁等结构的装配化，提出了一种钢梁-预制混凝土板采用高强螺栓的可拆卸装配式抗剪连接方法。以螺栓直径、孔径比（预留孔径和螺栓直径的比值）、约束条件为试验参数，设计了共14个试件，研究预制装配式高强螺栓抗剪连接件的抗剪性能。通过试验获得了预制装配式连接件的破坏模式、高强螺栓的抗剪承载力和荷载-滑移特性，同时，与现浇混凝土板推出试件的破坏模式和受力性能进行对比。试验结果表明：所有试件均发生螺栓的剪断破坏，且断裂均发生在混凝土板与钢梁的交界面上；增大孔径比能改善螺栓的抗剪性能；高强螺栓、无收缩自密实水泥基高强浇筑料（HPG）和混凝土板之间的连接是可靠的；由抗拉强度和截面面积控制的抗剪承载力计算公式可较好地预测连接件的极限承载力。

［关键词］抗剪连接件； 预制混凝土板； 钢梁； 高强螺栓； 波纹管

中图分类号：TU398文献标识码：A文章编号：1002-848X(2017)10-0065-06

Experimental study on shear behavior of high strength bolt connection for prefabricated composite beam

Liu Zhongliang1, Chen Jun1, Huo Jingsi2

(1 School of Civil Engineering and Mechanic, Xiangtan University, Xiangtan 411105, China;

2 College of Civil Engineering, Huaqiao University, Xiamen 361021, China)

Abstract:In order to realize the prefabrication of structures of steel-concrete composite floor and composite bridge, a detachable prefabricated shear connection method for steel beam-prefabricated concrete floor with high strength bolt was proposed. A total of 14 specimens were designed with the parameters of bolt diameter, aperture ratio (ratio of reserved aperture to bolt diameter) and the constraint condition as test parameters.The shear performance of prefabricated high strength bolted shear joints was studied. The failure mode and the load-slip characteristic of the high strength bolts were obtained by the tests, and the failure mode and the mechanical performance of the cast-in-place concrete slab were simulated. The results show that the shear failure of the bolt occurs in all the test specimens, and the fracture occurs at the interface between the concrete floor and the steel beam. The increase of the aperture ratio can improve the shear resistance of the bolts. The connection between high strength bolts, non-shrinkage self-compacting cement-based high-strength pouring grout (HPG) and the concrete floor is reliable. The shear bearing capacity calculation formula, controlled by the tensile strength and cross-sectional area, can better predict the ultimate bearing capacity of connections.

Keywords:shear connection; precast concrete slab;steel beam; high strength bolt; corrugated tube

*国家自然科学基金项目(51678256)，湘潭大学博士基金项目(13KZ|KZ08033)。

作者简介：刘中良，硕士研究生，Email:1051712029@qq.com。