Vertical Buckling of Offshore Pipelines with Geometrical Imperfection on Soft Seabed

 

Ruowei Shi

College of Civil Engineering and Architecture, Zhejiang University;
No.388, Yuhangtang road, Hangzhou, Zhejiang 310058,China
e-mail:owensrw@163.com

Kuanjun Wang

College of Civil Engineering and Architecture, Zhejiang University;
No.388, Yuhangtang road, Hangzhou, Zhejiang 310058,China
e-mail:steven_9090@163.com

Fan Long

China Railway SIYUAN Survey and Design Group Co., Ltd; No. 745, Heping Avenue, Yangyuan, Wuhan, China;  e-mail:longfan90@163.com

Hongwei Li

College of Hydraulic and Civil Engineering, Tarim University; Aler, Xinjiang, China; e-mail:zjulhw@163.com

 

 ABSTRACT

Conventionally vertical buckling of offshore pipelines caused by thermal load is analyzed by modeling the pipeline as a long heavy beam resting on a rigid seabed. However the seabed may be very soft and uneven, consequently under thermal compressive force the pipeline may penetrate into the seabed so the buckling mode changes. This study is concerned with the effect of seabed resistance on the process of vertical pipeline buckling with perfect geometry and imperfect geometry respectively; we find that the seabed resistance exerts remarkable influence on the phenomenon of vertical pipeline buckling.

Keywords: pipeline; buckling; soft seabed

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