地震作用下埋地弯管变形传递系数分析

由于管道与土体的刚度相差较大,在振动荷载下,两者的运动不能相互协调,致使在研究管道破坏方面,管土之间的变形传递是一个极其重要的研究方向.目前学者对弯管的管土变形传递研究做得较少.本文通过弯管与土体的缩尺振动台试验及三维有限元模型,得出了地震作用下埋地弯管的变形传递系数的拟合公式.然后将试验结果与拟合公式的计算结果和有限...

Analysis of deformation transfer coefficient of pipe bend buried under seismic load

Due to the large differences between the rigidity of the pipe and the soil, the motion of soil and pipe cannot be coordinated with each other under earthquakes. As a result, the deformation transferring mechanism between the pipe and the soil is extremely important for seismic design of pipeline. At present, few scholars have done researches on pipe-soil interaction of bent pipes. In this paper, based on a scaled shaking table test and simulation with a three-dimensional finite element model of the elbow and the soil, a fitting formula for the deformation transferring coefficient of buried elbows under earthquake is obtained. The change laws and control factors of the deformation transfer coefficient at the pipe elbow is also analyzed, including the analysis of different pipe diameters, buried depths, wall thickness, soil properties, and elbow angles, which have great influences on the interaction between pipe and soil. The fitting formula of the deformation transfer coefficient at the elbow in this paper is of great significance to the seismic design of the pipeline.