摘要
基于ANSYS建立了三维管-土相互作用的非线性有限元模型,计算分析了管道与地裂缝夹角、管沟回填材料和管道壁厚在地裂缝上下盘土体相对运动时对浅埋地下钢管受力变形的影响。研究结果表明,管沟回填减震材料和增加管壁厚度均可以明显减小管道的Mises塑性应变峰值。管道的受力变形情况随着管道与地裂缝夹角的变化而有所不同,管道与地裂缝的最佳交角在45°左右。管道的受力变形情况受管顶相对位移和管顶变形曲线曲率的共同影响。
The influence of the crossing angle of pipeline and ground fissure,the backfill soil of trench and the wall thickness of pipeline to the buried steel pipelines crossing ground fissure were analyzed by a3-D pipe-and-soil interaction nonlinear ANSYS finite model. The results indicate that the peak Mises plastic strain value of pipeline can be obviously reduced by backfill damping material and increasing the wall thickness of pipe. The bearing and deforming behavior of pipeline varies with changing of crossing angle of pipeline and ground fissure,the optimum crossing angle is about 45°. The bearing and deforming behavior of pipeline is also influenced by the relative displacement of the top of pipeline section and the curvature of its displacement curve.
出处
《科技通报》
2018年第9期63-68,共6页
Bulletin of Science and Technology
基金
陕西省自然科学基金(2016JM4013
2016JM4019)
长安大学中央高校基本科研业务费专项资金(310828163409)
关键词
地裂缝
地下管道
管-土相互作用
有限元
最佳交角
ground fissure
buried pipelines
pipe-soil interaction
finite element
optimum crossing angle
