Analytical model and stress behavior of consolidated load bearing geotextile tubes

IF 4.7 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL
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Abstract

Accurately predicting stress-strain characteristics is crucial to ensuring the regulated capacity and controlled deformation of the tubes during and after construction. However, research on the shear strength of geotextile tubes under surcharge loading, especially after dewatering, is insufficient. This study proposes an analytical model with a Stress-State Boundary (SSB) and Yield Function to comprehensively describe the stress-strain behavior of Load-Bearing Geotextile Tubes (LGTs). The SSB is designed to predict the initial state of stress in the infill soil prior to load application, while the Yield Function is formulated to express the shear stress path experienced by the LGT before fabric failure. The model considers various factors that affect LGT behavior, including diverse soil mechanical parameters, nonlinear fabric stiffness, initial tension due to self-weight and principal stress axes rotation. Results show that a decrease in Poisson's ratio corresponds to an increase in failure stress. Moreover, it was demonstrated that the axial failure strain can be influenced by the geotextile linear or nonlinear behavior. Notably, the study highlights that tube height and inclination angle significantly affect the geotextile's confining effect. Beyond theoretical contributions, the analytical model serves as a valuable tool for optimizing geotextile tube design and execution, contributing to project success and longevity through enhanced structural stability.

固结承载土工织物管的分析模型和应力行为
准确预测应力-应变特性对于确保土工布管在施工期间和施工后的调节能力和受控变形至关重要。然而,有关土工织物管在附加荷载(尤其是脱水后)作用下的剪切强度的研究尚不充分。本研究提出了一个包含应力状态边界(SSB)和屈服函数的分析模型,以全面描述承重土工织物管(LGT)的应力-应变行为。SSB 用于预测施加荷载前填充土中的初始应力状态,而屈服函数则用于表达 LGT 在织物破坏前所经历的剪应力路径。该模型考虑了影响 LGT 行为的各种因素,包括不同的土壤力学参数、非线性织物刚度、自重引起的初始张力以及主应力轴旋转。结果表明,泊松比的降低对应着破坏应力的增加。此外,研究还表明,轴向破坏应变会受到土工织物线性或非线性行为的影响。值得注意的是,该研究强调了管道高度和倾斜角度对土工织物约束效应的重要影响。除了理论上的贡献之外,该分析模型还是优化土工布管设计和执行的重要工具,通过增强结构稳定性来提高项目的成功率和寿命。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Geotextiles and Geomembranes
Geotextiles and Geomembranes 地学-地球科学综合
CiteScore
9.50
自引率
21.20%
发文量
111
审稿时长
59 days
期刊介绍: The range of products and their applications has expanded rapidly over the last decade with geotextiles and geomembranes being specified world wide. This rapid growth is paralleled by a virtual explosion of technology. Current reference books and even manufacturers' sponsored publications tend to date very quickly and the need for a vehicle to bring together and discuss the growing body of technology now available has become evident. Geotextiles and Geomembranes fills this need and provides a forum for the dissemination of information amongst research workers, designers, users and manufacturers. By providing a growing fund of information the journal increases general awareness, prompts further research and assists in the establishment of international codes and regulations.
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