Improvement of burst capacity model for pipelines containing surface cracks and its implication for reliability analysis

被引：0
作者：
Sun H. [1 ]
Zhou W. [1 ]
机构：
[1] Department of Civil and Environmental Engineering, The University of Western Ontario, London, N6A 5B9, ON
来源：
Journal of Infrastructure Intelligence and Resilience | 2023年 / 2卷 / 03期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Burst capacity; Full-scale tests; Gaussian process regression; Pipeline; Probability of burst; Surface crack;
D O I：
10.1016/j.iintel.2023.100043
中图分类号：
学科分类号：
摘要：
This paper presents the improvement of a widely used burst capacity model for steel oil and gas pipelines that contain longitudinal external surface cracks, namely the CorLAS model, through the addition of a correction factor that is quantified by the Gaussian process regression (GPR). The correction factor is assumed to depend on four non-dimensional input features that characterize both the crack geometry and pipe material properties. A database consisting of 212 full-scale burst tests of pipe specimens that contain longitudinal surface cracks is established based on the open literature, which is employed to train the GPR model and evaluate its performance. It is shown that GPR is highly effective in improving the accuracy of the CorLAS model predictions. The improvement is further shown to have a marked effect on the time-dependent probability of burst of pipelines containing growing surface cracks through two hypothetical pipeline examples: when employing the CorLAS model, the probabilities of burst are significantly higher, exceeding those obtained using the improved CorLAS model by more than one order of magnitude. © 2023 The Author(s)
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