交通和运行荷载耦合作用下管道承插口力学响应研究  

Study on Mechanical Response of the Bell-and-spigot Joints of Pipeline under the Coupling of Traffic and Running Load

作　　者：王复明[1,2,3,4] 何航 方宏远[1,2,3,4] 李斌[1,2,3] WANG Fuming;HE Hang;FANG Hongyuan;LI Bin(School of Water Conservancy Engineering,Zhengzhou University,Zhengzhou 450001,China;National Local Joint Engineering Laboratory of Major Infrastructure Testing and Rehabilitation Technology,Zhengzhou University,Zhengzhou 450001,China;Collaborative Innovation Center of Water Conservancy and Transportation Infrastructure Safety,Zhengzhou University,Zhengzhou 450001,China;Southern Engineering Inspection and Restoration Technology Research Institute,Huizhou 516029,China)

机构地区：[1]郑州大学水利科学与工程学院,河南郑州450001 [2]郑州大学重大基础设施检测修复技术国家地方联合工程实验室,河南郑州450001 [3]郑州大学水利与交通基础设施安全防护河南省协同创新中心,河南郑州450001 [4]南方工程检测修复技术研究院,广东惠州516029

出　　处：《郑州大学学报（工学版）》2020年第4期1-6,共6页Journal of Zhengzhou University（Engineering Science）

基　　金：十三五国家重点研发计划项目(2016YFC0802400);河南省重大科技专项(171100310100);河南省高校科技创新人才计划项目(19HASTIT043);郑州大学优秀青年教师发展基金项目(1621323001)。

摘　　要：承插式混凝土管是目前最为常见的城市排水管道结构形式,在管内流体和上覆荷载的耦合作用下可能发生接头破坏,进而引发管道渗漏。基于Abaqus和Fluent有限元软件建立了考虑橡胶圈承插口的排水管道三维精细化模型和管内流场模型,在充分考虑管土相互作用、承插口和橡胶圈接触以及管内流体的情况下,借助MpCCI(mesh-based parallel code coupling interface)平台联立求解了结构和流体模型,重点研究了不同流量、交通荷载大小和作用位置对承插口动力响应的影响规律。结果表明,在多场荷载的作用下,中心管节的最大主应力和竖向位移最大,且管底和管顶的应力分布规律相同,均受拉,但管底的应力值稍大;流量的改变对承插口的力学响应影响较小;交通荷载幅值大小对承插口的最大主应力和竖向位移的作用较显著,且影响集中在中心管节;荷载作用位置的移动对承插口竖向位移和管顶、管底的力学响应影响较明显。The concrete pipe with the bell-and-spigot joints was the most common structure of the urban drainage pipe,but joint failure might occur under the coupling of the fluid in the pipe and the overlying load,causing leakage of the pipeline.Based on Abaqus and Fluent finite element software,a three-dimensional refined model of the drainage pipeline with gasketed bell-and-spigot joints and the flow field model inside the pipeline were estabished.Under the full consideration of the pipe-soil interaction,the contact between the joint and the gasket and the fluid in the pipe,the structure model and fluid model were solved jointly by using MpCCI(Mesh-based parallel Code Coupling Interface)platform.The influence of different flow rates,different traffic load amplitudes and different load positions on the dynamic response of the joint were mainly studied.The results revealed that the maximum principal stress and vertical displacement of the central pipe joint were the largest under the multi-field load,and the stress distribution rule of the crown and the invert were the same,both of which were tensile,but the stress value at the invert is slightly larger.The change of flow rate had a little effect on the mechanical response of the bell-and-spigot joint.The magnitude of traffic load amplitude had a significant effect on the maximum principal stress and vertical displacement of the bell-and-spigot joint,and the influence was concentrated on the central joint.The movement of the load position had obvious influence on the vertical displacement of the bell-and-spigot joint and the mechanical response of the crown and invert.

关 键 词：多场耦合 承插口 交通荷载 运行荷载 数值分析 

分 类 号：TU990.3[建筑科学—市政工程]