用张力截断Tresca强度准则评价黏性土中浅埋板锚不排水突破能力

IF 5.5 2区 工程技术 Q1 ENGINEERING, CIVIL
R. Ganesh
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引用次数: 0

摘要

板锚被广泛用于许多海上基础设施的经济系泊系统。以往的研究主要是基于经典的Tresca (CT)强度准则,该准则假设单轴屈服强度在压缩和拉伸下相等。然而,观测到的黏性土的单轴抗拉强度往往远低于其压缩对应的抗拉强度,这强调了在实际工程应用中考虑实际抗拉强度的必要性。本研究利用张力截断Tresca (TT)强度准则,研究了纯黏性土壤中浅埋水平板锚的抗拉强度截断对最终不排水突破能力的潜在影响。分析采用基于水平片上限塑性理论的离散求和法,计算了圆形、方形、矩形、条形等不同形状板锚的不排水突破能力。采用CT和TT强度标准得到的结果对比表明,拉力切断对粘性土中板锚的最终不排水突破能力有显著影响。此外,研究还探讨了典型参数组合下不同锚土界面条件及相关破溃面对锚固破坏的影响。值得注意的是,本研究的结果与现有文献中可用的数值和实验结果一致。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of undrained breakout capacity of shallowly buried plate anchors in cohesive soils using a tension-truncated Tresca strength criterion
Plate anchors are widely used to provide economical mooring systems for many offshore infrastructures. Previous studies examining the undrained breakout capacity of plate anchors in purely cohesive soils were predominantly based on the classical Tresca (CT) strength criterion, which assumes equal uniaxial yield strengths in compression and tension. However, the observed uniaxial tensile strength of cohesive soils is often much lower than its compression counterpart, emphasizing the need to consider realistic tensile strength in practical engineering applications. This research investigates the potential impact of a tensile strength cutoff on the ultimate undrained breakout capacity of shallowly buried horizontal plate anchors in purely cohesive soils, utilizing a tension-truncated Tresca (TT) strength criterion. The analysis employs the discrete sum method based on horizontal slices within the upper bound plasticity theory to calculate the undrained breakout capacity of plate anchors under varying shapes, including circular, square, rectangular, and strip. A comparison of results obtained using both CT and TT strength criteria reveals a significant effect of the tension cutoff on the ultimate undrained breakout capacity of plate anchors in cohesive soils. Additionally, the study explores the influence of different anchor-soil interface conditions and the associated breakout failure surfaces under typical parameter combinations. Remarkably, the results of this study align well with the available numerical and experimental results in the existing literature.
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来源期刊
Ocean Engineering
Ocean Engineering 工程技术-工程:大洋
CiteScore
7.30
自引率
34.00%
发文量
2379
审稿时长
8.1 months
期刊介绍: Ocean Engineering provides a medium for the publication of original research and development work in the field of ocean engineering. Ocean Engineering seeks papers in the following topics.
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