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| Analysis of steel tube collapse under bending or tensile loading |
| Received:September 24, 2019 Revised:November 11, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20190924002 |
| KeyWord:marine pipelines collapse analysis numerical simulation bending load tensile load |
| Author | Institution |
| 陈国龙 |
中石化石油工程设计有限公司, 山东 |
| 冯春健 |
中石化石油工程设计有限公司, 山东 |
| 李涛 |
大连理工大学 海洋科学与技术学院, 盘锦 |
| 卢青针 |
大连理工大学 海洋科学与技术学院, 盘锦 |
| 崔樱华 |
大连理工大学 海洋科学与技术学院, 盘锦 |
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| Abstract: |
| Steel pipes are widely used in offshore oil and gas resources development.They are generally designed according to the load when in service.The design theory is quite mature.However,in some installation conditions,the tensile and bending loads are of the same order of magnitude.In this paper,the anti-collapse performance of a steel pipe under tensile and bending loads is studied.Its finite element model was established based on the commercial software ABAQUS,and the correctness of the finite element model was verified by the steel tube collapse experiment with bending load collapse,and then the influence of tensile and bending loads on the crushing performance of the pipe against external pressure was discussed by using the verified numerical model.The results show that the bending load is an important factor that affects the collapse performance,and the increase of bending load will decrease the ultimate collapse value significantly.The tensile load has a certain effect on the collapse behavior of the pipeline,but the effect is very small under the joint action of both,the ultimate collapse value first increases and then decreases with the increase of bending load,and the position of the extreme value is related to the size of tensile load and bending load.Therefore,the influence of bending load on collapse should be mainly considered in the compressive collapse design,while the influence of tensile load can be ignored.This work can provide guide to the installation of Marine pipeline |
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