场地液化条件下埋地弯管道力学反应的数值模拟OA北大核心CSCDCSTPCD

Based on finite element analysis software ADINA,a pipe-soil contact and soil spring nu-merical analysis model of buried bent pipe in liquefied field was established.Pipe-soil contact in non-liquefied region and constraint effect of liquefied soil on pipe were considered by setting tran-sition zone in liquefied region.Then the effective stress and axial stress of pipe were analyzed.Re-sults indicate that the effective stress of bent part is very large when bent pipe exists in liquefied field.Thus,bent part will be one of the weakest parts in the whole pipe network.The effective stress of bent pipe decreases and the bent pipe is less prone to damage as the wall thickness and curvature radius of bent pipe increase,which benefits earthquake resistance.The axial stress of bent pipe increases as the distance of bent pipe in liquefied region to the interface of liquefied re-gion and non-liquefied region increases,and there exists an optimal position where the effective stress of bent pipe is the minimum.