摘要
考虑薄壳的大变形和管土的相互作用,建立埋地管道的管土耦合非线性有限元模型,分析管道在横向滑坡作用下的响应规律,讨论了滑坡宽度、滑坡位移、滑坡角度、管道埋深、管道内压等相关工程参数对分析结果的影响,并应用应变准则对管道进行安全评价.结果显示,管道的高应力、应变主要出现在滑坡中间区域及滑坡区与非滑坡区交界处;相同的滑坡位移下,滑坡宽度越小,管道的轴向拉应变越大;滑坡角度越小,管道的轴向拉应变越大;在相同的滑坡规模下,管道轴向拉应变随内压、埋深的增加而不断升高.分析结果可为埋地管道的抗震设计和施工提供参考.
Considering large deformation of thin shell and soil- pipe interaction,the nonlinear coupled model of the buried pipe was established under the condition of transverse landslide. The effects of relative parameters,such as landslide width,landslide displacement,landslide angle,buried depth and pressure,to the responses of the pipeline were analyzed,and the safety of pipeline was evaluated by the strain criterion. The results showed that the high stress and strain occurred in the intermediate region of the landslide and the junction of landslide zone and non- landslide zone. The axial tensile strain of the pipeline increased with the decrease of the landslide width and landslide angle under the same landslide displacement. And under the same landslide scale,the axial tensile strain of the pipeline increased with the enhancement of the pressure and buried depth of the pipeline. The results can provide a reference for the design and site construction of buried pipelines in the case of landslide hazard.
出处
《佳木斯大学学报（自然科学版）》
CAS
2015年第4期556-560,共5页
Journal of Jiamusi University：Natural Science Edition
关键词
埋地管道
横向滑坡
管土耦合
应变准则
buried pipeline
transverse landslide
soil-pipe coupling
strain criterion
