Vertical Upheaval Buckling of Submarine Buried Heated Pipelines with Initial Imperfection

作     者：王武刚 刘润 闫澍旺 徐余 WANG Wugang 1,LIU Run 1,YAN Shuwang 1,XU Yu 2 (1.School of Civil Engineering,Tianjin University,Tianjin 300072,China;2.Tianjin Architecture Design Institute,Tianjin 300074,China)

作者机构：School of Civil EngineeringTianjin University Tianjin Architecture Design Institute 

出 版 物：《Transactions of Tianjin University》 (天津大学学报（英文版）)

年 卷 期：2011年第17卷第2期

页      面：138-145页

核心收录：

学科分类：08[工学] 0823[工学-交通运输工程] 

基　　金：Supported by National Natural Science Foundation of China (No.40776055) 

主　　题：submarine buried pipeline thermal stress initial imperfection upheaval buckling protection measure 

摘      要：In this paper,a theoretical solution of vertical buckling is proposed with regard to the typical initial imperfection cases of submarine *** tools are applied to predicting the occurrence and consequence of inservice buckling of a buried heated pipeline in Bohai *** evaluation is performed to ensure the pipeline structural integrity during operation under loading *** protection measures are proposed and their validities are *** show that for the same magnitude of initial imperfection,the upheaval buckling of pipeline with isolated prop model is the most likely to *** empathetic model represents a special sub-case of continuous prop model,and the calculated buckle temperature is between the first stage and the second stage of post-upheaval buckling of continuous prop *** the larger the initial imperfection,the less the axial force required for the upheaval ***,it can be seen that a peak point appears on the curves of temperature difference against buckling amplitude for small initial ***,trenching-burial is one kind of protection measures preventing the pipeline from thermal *** covered depth-to-diameter ratio depends on the design conditions and subsoil *** the given pipeline in this paper,the covered depth-to-diameter ratio is recommended to be 5.