装配式钢-混凝土组合梁高强螺栓剪力连接件力学模型  

MECHANICAL MODEL OF HIGH STRENGTH BOLT SHEAR CONNECTOR OF FABRICATED STEEL-CONCRETE COMPOSITE BEAM

作　　者：张凡[1] 陈炳聪 刘爱荣[1] 周危 刘国蔚 ZHANG Fan;CHEN Bing-cong;LIU Ai-rong;ZHOU Wei;LIU Guo-wei(Wind Engineering and Engineering Vibration Research Testing Center,Guangzhou,Guangdong 510006,China;School of Civil Engineering Guangzhou University,Guangzhou,Guangdong 510006,China)

机构地区：[1]广州大学风工程与工程振动研究中心,广东广州510006 [2]广州大学土木工程学院,广东广州510006

出　　处：《工程力学》2022年第S01期173-179,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(51278134);高等学校学科创新引智计划项目(111计划D21021);广州市科技计划项目(20212200004);中国工程院战略咨询重点项目(2021-XZ-37)。

摘　　要：剪力连接件是装配式钢-混凝土组合梁的关键部件,其荷载-滑移曲线大致分为四个阶段,即滑移前摩擦阶段、滑移阶段、滑移后弹性阶段、滑移后塑性阶段。该文通过弹性地基梁理论和材料力学平面应力理论,建立了高强螺栓剪力连接件的受力模型,对前三个阶段的受力行为进行了理论解析分析,并通过多组试验数据对理论结果进行了验证,二者吻合良好。研究表明:剪力连接件在整个受力过程同时受弯矩、剪力和轴力的耦合作用,该文提出的力学模型能较为准确的模拟螺栓弹性阶段的极限值,能初步解释螺栓在弹性段抗剪性能随预拉力变化的原因;并得出了螺栓弹性段弯矩对其屈服极限影响有限的结论。The shear connector is the key component of a fabricated steel-concrete composite beam.Its load slip curve is roughly divided into four stages,namely,friction stage before slip,slip stage,elastic stage after slip and plastic stage after slip.In this study,through the elastic foundation beam theory and the plane stress theory of material mechanics,the stress model of a high-strength bolt shear connector is established,the stress behavior of the first three stages is theoretically analyzed,and the theoretical results are verified by several groups of experimental data,and the results are in a good agreement.The research shows that:in the stress process of the shear connector,the shear surface of the screw is subjected to the coupling action of the bending moment,of the shearing force and,of the axial force.The mechanical model proposed can accurately simulate the limit value of the bolt in the elastic stage,and can preliminarily explain the reason why the shear performance of the bolt changes with the pretension in the elastic section.It is concluded that the bending moment of the elastic section of the bolt has little effect on its yield limit.

关 键 词：桥梁工程 力学模型 推出试验 弹性地基梁 组合梁 剪力连接件 

分 类 号：TU398.9[建筑科学—结构工程]