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首页> 外文会议>International offshore and polar engineering conference;ISOPE-2009 >Bending Capacity and Seismic Integrity of X65 ERW Line Pipe
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Bending Capacity and Seismic Integrity of X65 ERW Line Pipe

机译：X65 ERW管线管的抗弯能力和抗震完整性

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In this paper, critical compressive strains of X65 ERW pipes arediscussed. Three bending tests using X65 electric resistance weldedsteel pipes (hereinafter ERW pipes) were conducted to investigate theirbending capacity. The outside diameter, wall thickness were 20 inch(508 mm) and 15.7 mm, respectively. The length of the test pipes was3.8 m. The average Y/T ratio was 88%. The welding seam top andbottom of the pipe (tension and compression side of the bending, each)and pressurized to hoop stress of 40, 60, and 66% SMYS. Andlongitudinal stress was generated in the pipe as both end caps werepressurized. And pipes were bent before the pipe crack or the limitationof the apparatus.In these experiments, the bending capacity and the welding seamdeformation at ultimate state of the specimens are discussed. Bendingcapacities of these pipes are estimated with average critical compressivestrain at the peak moment. The bending tests of the pipes clarified thatthe 2D average critical compressive strains were 5.43%, 4.01% and6.16%, respectively. In the ultimate state, all specimens buckled withwrinkling at the center of the pipe's compression side and one of thesepipes burst at the center of the pipe's tension side. But even in theseultimate states, any damages were not found at the bead of ERW.
机译：本文讨论了X65 ERW管道的临界压缩应变。使用X65电阻焊钢管（以下称为ERW管）进行了三个弯曲试验，以研究其弯曲能力。外径，壁厚分别为20英寸（508毫米）和15.7毫米。试管的长度为3.8 m。平均Y / T比为88％。管道的焊缝顶部和底部（弯曲的拉伸和压缩面各一个），并被加压到40％，60％和66％SMYS的环向应力。当两个端盖都受压时，在管道中产生了纵向应力。在试管破裂或设备受限之前先对试管进行弯曲。在这些实验中，讨论了试件在极限状态下的弯曲能力和焊缝变形。用峰值时刻的平均临界压缩应变估算这些管道的弯曲能力。管道的弯曲试验表明，二维平均临界压缩应变分别为5.43％，4.01％和6.16％。在极限状态下，所有试样在管的受压侧中心皱折弯曲，其中一根管在管的受拉侧中心破裂。但是，即使在这些最终状态下，也没有在ERW磁珠处发现任何损坏。

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