Numerical Simulation Investigation of Mechanical Behaviors of Water Mains under Temperature Effect

• Published in: Fangzai Jianzai Gongcheng Xuebao no. 5; p. 1141
• Main Authors: Wang, Liping, Zhao, Shuai, Zhang, Wanjing, Ning, Chaolie
• Format: Journal Article
• Language: Chinese
• Published: Nanjing Zhongguo Zaihai Fangyu Xiehui 01.01.2023
• Subjects: Buried pipes; Computer simulation; Diameters; Empirical equations; Finite element method; Mathematical analysis; Mathematical models; Mechanical properties; Numerical models; Seasonal variations; Simulation; Soil mechanics; Soil temperature; Soil water; Soil-structure interaction; Soils; Summer; Temperature effects; Thermal expansion; Three dimensional models; Variation; Wall thickness; Water damage; Water depth; Water mains; Water pipelines; Water temperature; Winter
• ISSN: 1672-2132
• DOI: 10.13409/j.cnki.jdpme.20220430001

Water mains are frequently damaged with leaking and bursting accidents in both summer and winter seasons, highlighting the significant influence of temperature on the structural operational safety of water mains. However, existing studies have often ignored the effect of temperature variation on the mechanical behaviors of water mains. In this study, the finite element numerical simulation method was employed to build a thermal mechanical coupling three-dimensional numerical model, considering the pipeline-soil interaction effect. We investigated the effect of ground temperature variation on the thermal field of the soils surrounding the pipeline, studied the variation of the mechanical behaviors of water mains induced by the discrepancy of soil and water temperature, and analyzed the influence of buried depth, pipe diameter, and wall thickness on the mechanical behavior of water mains under different ground temperatures. To establish empirical prediction equations between maximum stress and maximum vertical