摘要：Submarine pipelines are often operated under conditions of high temperature and high pressure, which may induce considerable axial compressive force. If the lateral movement is constrained, for instance, burying pipe or dumping gravel, upheaval budding may happen. Pipe-soil interaction affects the upheaval buckling behavior of submarine pipelines. However, pipe-soil interaction models currently existing fail to reflect the drop process of uplift resistance when the vertical displacement is over mobilization distance. To solve this problem, a new nonlinear pipe-soil interaction model is presented and the governing differential equation of an imperfect pipeline on soft foundation is deduced. The solution to the governing differential equation is proposed based on nonlinear perturbation expansions. The effect of soil conditions, burial depth and initial imperfections on critical force as well Is localization pattern of upheaval buckling are discussed. Results show that the capacity of pipeline against thermal buckling increases with the burial depth or maximum uplift resistance and decreases with the OOS of pipeline or mobilization distance. Critical buckling force is almost unaffected by pipe-soil interaction form, but the post-buckling response depends on pipe-soil interaction forms. The pipe-soil interaction model can be used not only in pre-buckling design but also in post-buckling control.

关键字：Submarine pipeline Upheaval buckling Nonlinear pipe-soil interaction Perturbation

ISSN号：0029-8018

卷、期、页：卷: 132 页: 92-100

发表日期：2017-03-01

影响因子：0.000000

收录情况：SCI（科学引文索引印刷版）,ESI（基本科学指标数据库）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：Ocean Engineering

参与作者：Estefen, Segen F.

通讯作者：张新虎,赵昱,陈浩然

第一作者：王莹莹,段梦兰

论文类型：期刊论文

论文概要：王莹莹,张新虎,赵昱,陈浩然,段梦兰,Estefen, Segen F.，Perturbation analysis for upheaval buckling of imperfect buried pipelines based on nonlinear pipe-soil interaction，Ocean Engineering，2017，卷: 132 页: 92-100

论文题目：Perturbation analysis for upheaval buckling of imperfect buried pipelines based on nonlinear pipe-soil interaction