温度应力作用下直埋供热管道非线性屈曲分析  

Analysis on Nonlinear Buckling of Buried Heating-pipeline Caused by Temperature Stress

作　　者：王晖[1] 查志旭 王长祥[2] Wang Hui Zha Zhixu Wang Changxiang(School of Civil Engineering, Tianjin University, 30002, Chin North China Municipal Engineering Design ＆ Research Institute, Tianjin 300074, China)

机构地区：[1]天津大学建筑工程学院,300072 [2]中国市政工程华北设计研究总院有限公司,天津300074

出　　处：《特种结构》2016年第6期42-46,共5页Special Structures

摘　　要：直埋供热管道在温度应力作用下的屈曲变形是管道设计的一个重要问题。应用有限元软件ANSYS,建立三维管土相互作用的有限元模型,模拟出温度应力作用下管道非线性屈曲变形过程。对不同的管道埋深、管径、管土摩擦系数以及初始缺陷等影响因素进行参数化分析,得出了不同因素影响下管道的临界屈曲温差和屈曲变形规律。结论表明在初始缺陷小,埋深大,管径大等情况下直埋供热管道具有较强的整体稳定性。The vertical buckling of buried heating-pipelines caused by temperature stress isan important issue for pipeline design. ANSYS was applied to build the three-dimensional model of soil-pipe contact interaction and simulated the nonlinear buckling process of the pipeline. Analysis on different influences, such as initial imperfection, cover depth, pipe diameter and pipe-soil friction coefficient obtained critical buckling temperature and the law of buckling deformation which indicated that smaller initial imperfection, larger cover depth and pipe diameter can ensure the stability of buried heating-pipelines.

关 键 词：直埋供热管道 ANSYS 管土接触作用 非线性屈曲 初始缺陷 

分 类 号：TU995.3[建筑科学—供热、供燃气、通风及空调工程]