自带约束构造的栓钉抗剪连接件受力性能研究  

Research on mechanical behavior of stud shear connector with constraint measure

作　　者：戚菁菁[1] 曹华 卜明华 胡晓 吕伟荣[1] 黄志 QI Jingjing;CAO Hua;PU Minghua;HU Xiao;LV Weirong;HUANG Zhi(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411021,China;Hunan Architectural Design Institute Co.,Ltd.,Changsha 410012,China)

机构地区：[1]湖南科技大学土木工程学院,湘潭411021 [2]湖南省建筑设计院有限公司,长沙410012

出　　处：《建筑结构》2021年第18期32-39,共8页Building Structure

基　　金：国家自然科学基金项目(51808213);湖南省教育厅重点项目(20A184)。

摘　　要：钢-混凝土组合构件中的栓钉抗剪连接件作为主要传力部件,在混凝土中的力学行为极为复杂,栓钉周围的混凝土受栓钉"剪撬"局压集中作用极易产生劈裂微裂缝。为解决栓钉抗剪连接件"剪撬"局压劈裂的问题,提出一类带约束构造的栓钉抗剪连接件,通过推出试验研究了该新型栓钉连接件在钢-混凝土翼缘板之间的界面抗剪受力性能,比较了其与传统栓钉界面抗剪性能的差异。研究表明:带约束构造的栓钉抗剪连接件能依靠自身的约束构造有效地避免"剪撬"局压劈裂的不利影响,较大地提高钢-混凝土翼缘板之间的界面抗剪刚度,为钢-混凝土组合构件强连接系数的设计提供了理论依据。The stud shear connector is the main force transfer member in the steel-concrete composite member,and the mechanical behavior is very complicated in the concrete.The concrete around the stud is subjected to the pry-out local pressure concentration of the stud,which can easily produce splitting mirco-cracks.In order to solve the problem of pry-out local pressure splitting of stud shear mechanical connector,a kind of stud connector with constraint measure was proposed.Through the push-out test,the interface shear mechanical behavior of the new stud connector between steel and concrete flange plate was studied,and the difference between the new stud connector and the traditional stud connector was compared.The results show that the stud shear connector with constraint measure can effectively avoid the adverse effect of pry-out local pressure splitting by relying on its own constraint measure.The shear stiffness of the interface between steel and concrete flange plates is greatly improved,which provides a theoretical basis for the design of strong connection coefficient of steel-concrete composite members.

关 键 词：栓钉抗剪连接件 约束构造 滑移 剪切刚度 横向钢筋 

分 类 号：TU398.9[建筑科学—结构工程]