栓接装配式钢-混凝土组合梁及其抗剪键的力学性能研究  

Mechanical Properties of Bolted Prefabricated Steel-concrete Composite Beams and the Shear Connectors

作　　者：陈庆伟 王文洋 王志鹏 潘晨 肖宜凯 CHEN Qing-wei;WANG Wen-yang;WANG Zhi-peng;PAN Chen;XIAO Yi-kai(State Grid Shandong Electric Power Company Economic and Technological Research Institute,Jinan 250021,China;College of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]国网山东省电力公司经济技术研究院,济南250021 [2]太原理工大学土木工程学院,太原030024

出　　处：《科学技术与工程》2023年第32期13917-13926,共10页Science Technology and Engineering

基　　金：国网山东省电力公司科技项目(520625210008)。

摘　　要：为了探究摩擦型高强度螺栓在装配式钢-混凝土组合梁中的适用性,采用ABAQUS有限元软件建立推出试件和简支梁试件的有限元模型。在试验结果验证模拟可靠性的基础上,研究螺栓预拉力、螺栓孔径、混凝土强度和螺栓强度等因素对单个抗剪键及整体组合梁的影响。分析结果表明:抗剪键的受力过程分为摩擦、滑移、承压和破坏4个阶段;螺栓预拉力、混凝土强度的增大有利于提高摩擦型高强度螺栓的极限承载力和承压抗剪刚度,较大的混凝土孔隙显著降低了螺栓抗剪刚度;提高螺栓预紧力或提高混凝土强度均可增强钢与混凝土部件的组合作用,相反,在抗剪连接程度不变的情况下,提高螺栓等级导致界面刚度分布不均,不利于滑移控制。In order to explore the applicability of friction high-strength bolts in prefabricated steel-concrete composite beams,the finite element model of push-out specimen and simply supported beam were established by ABAQUS finite element software.After verifying the reliability of the simulation through experimental results,the effects of bolt pretension,bolt aperture,concrete strength,and bolt strength on individual shear connectors and overall composite beams were studied.The analysis results show that the stress process of shear connector can be divided into four stages:friction,slip,compression,and failure.The increase of bolt pretension and concrete strength is beneficial for improving the ultimate bearing capacity and compressive shear stiffness of friction high-strength bolts,while larger bolt aperture significantly reduced the shear stiffness of bolts.Increasing the bolt pretension or the concrete strength can enhance the composite effect of steel and concrete components.On the contrary,when the shear connection degree remains unchanged,increase of the bolt grade led to uneven distribution of interface stiffness,which is not conducive to slip control.

关 键 词：钢-混凝土组合梁 摩擦型高强度螺栓 装配式 抗剪连接件 有限元 

分 类 号：TU174.3[建筑科学—建筑理论]