建筑钢结构进展2024，Vol.26Issue(3)：30-40,11.DOI:10.13969/j.cnki.cn31-1893.2024.03.004
端板攻丝高强度螺栓连接受力性能试验研究
Experiment on the Mechanical Behavior of High-Strength Bolted Connection with Tapping End Plate
摘要
Abstract
This paper compares the mechanical behavior of 10.9S grade M16,M20 high-strength bolted connection and Q345B end plate tapping connection with the traditional high-strength bolts,and studies the failure mode,stress mechanism and ultimate bearing capacity under uniaxial tension,uniaxial shear and tension-shear combined stress conditions.Test results show that for uniaxial tension,the ultimate bearing capacity and deformation and the traditional connection is basically the same.For uniaxial shear,M20 bolts even when the thickness to diameter ratio of 0.8,can still meet the bolt shear,and the end plate tapping hole in the tooth body no obvious deformation damage and tapping the form of early slip of the connector is significantly smaller.For tension-shear combined actions,with the increase in the tension-shear ratio from 0.58 to 1.73,the damage morphological transformation from shear failure began to change to tensile failure.Therefore,in order to ensure that the end plate tapped tooth body is not significantly damaged,the reasonable design of the bolt and plate thickness should be considered,and it is recommended that the thickness to diameter ratio of M20 bolts should not be lower than 0.9d in uniaxial tension and tension-shear composite stress,and the load bearing capacity of the end plate tapped connection of high-strength bolts in the three stress states is basically the same as that of the traditional connection.The analysis of test results can provide a reference for engineering design.关键词
高强度螺栓/连接节点/端板攻丝/破坏模式/拉-剪复合受力Key words
high-strength bolt/connection/end plate tapping/failure mode/combined tension-shear action分类
建筑与水利引用本文复制引用
刘忠陪,卢倍嵘,吕伟荣,邓伟杰,刘梦洋,马素静..端板攻丝高强度螺栓连接受力性能试验研究[J].建筑钢结构进展,2024,26(3):30-40,11.基金项目
湖南省自然科学基金(2023JJ30253) （2023JJ30253）
