（四川大学建筑与环境学院， 成都 610065）

［摘要］为研究高强螺栓端板连接件的抗拉拔性能，试验共设计了7个外伸端板连接件试件，并对其进行静力加载试验，其中4个试件采用高强螺栓替代传统的普通螺栓连接。试验对比分析了不同方钢管壁厚、螺栓孔间距、螺栓杆径对连接件抗拉拔承载能力的影响。结果表明：改变连接件中方钢管壁厚、螺栓孔间距和螺栓杆径均可以提高端板连接件的抗拉拔承载能力，其中改变方钢管壁厚对承载力的影响最为显著。且对于5mm和8mm方钢管壁厚试件的最终破坏失效模式不同，具体表现为随着空心方钢管壁厚的逐渐增大，失效模式由钢管连接面失效转变为螺栓断裂破坏。这些研究结果为高强螺栓端板连接件的研究和应用提供了一定的理论基础。

［关键词］高强螺栓； 端板连接； 拉拔承载力； 塑性变形

中图分类号：TU391文献标识码：A文章编号：1002-848X(2017)04-0067-05

Tensile bearing capacity study of end plate connection with high-strength bolts

Liu Xiaokai， Wang Qingyuan， Wang Zhiyu

(College of Architecture & Environment, Sichuan University, Chengdu 610065, China)

Abstract:In order to study the tensile bearing capacity of end plate connection with high-strength bolts, 7 extensional end-plate connections were designed in the experiment and static loading test was conducted. Among them, 4 specimens were adopted in high-strength bolts to replace the traditional common bolt connections. The influences of wall thickness, bolt hole spacing and bolt diameter of the different square steel pipes on tensile bearing capacity of connectors were analyzed and compared. The results show that it can improve the tensile bearing capacity of the end plate connection by changing the wall thickness, bolt hole spacing and the bolt diameter, and the change of the wall thickness has the most significant effect on the bearing capacity. The final failure modes between the 5mm and 8mm thick square steel pipe specimens are different, which mainly reflects that with the increasing wall thickness of the hollow square steel pipe, the failure mode is changed from the failure of the pipe connecting surface to the bolt breaking failure. These results provide a theoretical basis for the research and application of high-strength bold end plate connections.

Keywords:high-strength bolt； end plate connection； tensile bearing capacity； plastic deformation

*国家自然科学基金项目（51308363）。

作者简介：刘晓凯，硕士，Email：liuxiaokai@stu.scu.edu.cn。