温度对含凹陷复合管力学性能影响研究  

STUDY ON THE IMPACT OF TEMPERATURE ON THE MECHANICAL PROPERTIES OF DENTED COMPOSITE PIPES

作　　者：何世亮 孙中明 傅小坚 胡大卫 阮伟东 HE Shiliang;SUN Zhongming;FU Xiaojian;HU Dawei;RUAN Weidong(Ningbo Huitong Pipeline Technology Co.,Ltd.,Zhejiang Ningbo 315600,China;Tongchuang Engineering Design Company Ltd,Shaoxing 312000,China;College of Civil Engineering,Zhejiang University of Technology,Zhejiang Hangzhou 310023,China)

机构地区：[1]宁波市慧通管道科技有限公司,浙江宁波315600 [2]同创工程设计有限公司,浙江绍兴312000 [3]浙江工业大学土木工程学院,杭州310023

出　　处：《低温建筑技术》2024年第12期129-133,共5页Low Temperature Architecture Technology

基　　金：宁波市自然科学基金项目(2021J039);浙江省属高校基本科研业务费专项资金资助项目(RF-A2022006)。

摘　　要：凹陷作为埋地管道常见的缺陷类型,会极大地增加管道的安全隐患。文中采用ABAQUS软件建立温度荷载作用下含凹陷钢丝缠绕增强塑料复合管(PSP管)有限元模型,准确地模拟PSP管HDPE材料在不同温度下的非线性本构模型,探究温度荷载对含凹陷PSP复合管力学性能的影响规律。研究结果发现,HDPE基体最大Mises应力和对应位置的等效塑性应变(PEEQ)均随着温度的增大而不断降低;以10℃为初始温度,温度升高导致螺旋钢丝发生膨胀进而加剧应力响应,而HDPE基体的本构模型受温度影响显著,因此温度升高虽然导致HDPE基体发生膨胀,却最终导致其应力下降。As a common type of defect in buried pipelines,dents can significantly increase safety risks.In this study,the ABAQUS commercial software was used to establish a finite element model of a dented steel wire-wound reinforced plastic composite pipe(PSP pipe)under temperature load.The nonlinear constitutive model of HDPE material in the PSP pipe was accurately simulated at different temperatures to explore the influence of temperature load on the mechanical performance of dented PSP composite pipes.The study found that both the maximum Mises stress and the corresponding equivalent plastic strain(PEEQ)of the HDPE matrix decreased as the temperature increased.Starting from an initial temperature of 10°C,temperature rise caused the spiral steel wire to expand,which in turn intensified the stress response.However,the constitutive model of the HDPE matrix was significantly affected by temperature,and although temperature rise caused the HDPE matrix to expand,it ultimately led to a decrease in its stress.

关 键 词：凹陷钢丝缠绕 塑料复合管 等效塑性应变 

分 类 号：TU991.36[建筑科学—市政工程]