直螺栓连接的矩形顶管接头抗剪性能数值模拟研究  

Numerical simulation study on shear performance of rectangularpipe jacking joint connected by straight bolts

作　　者：许有俊 林洪泽[1] 张朝 XYU Youjun;LIN Hongze;ZHANG Chao(School of Civil Engineering,Inner Mongolia University of Science&Technology,Baotou 014010,China;Academician Workstation of Mine Safety and Underground Engineering,Inner Mongolia University of Science&Technology,Baotou 014010,China;Engineering Research Center of Urban Underground Engineering at Universities of Inner Mongolia Autonomous Region,Inner Mongolia University of Science&Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学土木工程学院,内蒙古包头014010 [2]内蒙古科技大学矿山安全与地下工程院士专家工作站,内蒙古包头014010 [3]内蒙古科技大学内蒙古自治区高校“城市地下工程技术研究中心”,内蒙古包头014010

出　　处：《内蒙古科技大学学报》2025年第1期55-62,共8页Journal of Inner Mongolia University of Science and Technology

基　　金：国家自然科学基金(52168060)。

摘　　要：利用ABAQUS有限元软件对带有直螺栓纵向连接件矩形顶管接头的抗剪性能及影响因素进行了分析。结果表明:1)剪切作用下,接头混凝土手孔处最先破坏,直螺栓左右接头受力呈中心对称式,钢套环屈服发生在倒角处;2)接头受剪切作用下的位移-荷载曲线分为3个阶段:接触阶段、工作阶段、失效-破坏阶段,工作阶段接头抗剪刚度最大;3)增大钢套环厚度可提升接头抗剪承载能力;直螺栓直径每增加2 mm,接头第一阶段抗剪刚度提高8.2%~10.0%。The shear performance and influencing factors of rectangular pipe jacking joints with straight bolt longitudinal connectors were analyzed by ABAQUS finite element software.The results show that:1)Under the shear action,the concrete hand hole of the joint is destroyed first,the force of the left and right joints of the straight bolt is symmetrical,and the yield of the steel sleeve ring occurs at the chamfer.2)The displacement-load curve of the joint under shear action is divided into three stages:contact stage,working stage and failure-failure stage,and the shear stiffness of the joint is the largest in the second stage.3)Increasing the thickness of the steel sleeve ring can improve the shear bearing capacity of the joint.For every 2 mm increase in the diameter of the straight bolt,the shear stiffness of the first stage of the joint is increased by 8.2%~10.0%.

关 键 词：矩形顶管 直螺栓 数值模拟 抗剪刚度 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]