Insights into the assessment and interpretation of earthquake-induced liquefaction in sands under different degrees of saturation

IF 10.8 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY
Fausto Molina-Gómez , António Viana da Fonseca , Cristiana Ferreira , Bernardo Caicedo
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引用次数: 0

Abstract

Earthquake-induced liquefaction is a prominent and impactful natural hazard responsible for substantial economic losses worldwide. Hence, engineers and researchers are currently interested in developing methods and techniques to mitigate this destructive phenomenon. Reducing the degree of saturation is a reliable method to improve the liquefaction resistance of sandy soils since it directly influences the pore pressure build-up during seismic action. This paper reviews the mechanisms and assessment of earthquake-induced liquefaction in sandy soils with various degrees of saturation, a crucial parameter for reducing the phenomenon triggering. In addition, it presents novel approaches that delve into interpreting cyclic behaviour with diverse degrees of saturation using stress-based and energy-based approaches. The experimental results compiled and discussed show that, effectively, reducing the degree of saturation holds promise as a viable strategy for enhancing soil liquefaction resistance and mitigating associated risks. Moreover, the interpretation of cyclic behaviour addressed in this paper offers valuable insights into the reliability of interpreting methods to quantify the liquefaction resistance under several degrees of saturation (that may be achieved by desaturation or induced partial saturation techniques), contributing to strategies for resilience against earthquake-induced damages.

对不同饱和度条件下地震诱发的砂土液化的评估和解释的启示
地震引起的液化是一种突出的、有影响的自然灾害,在全世界造成了巨大的经济损失。因此,工程师和研究人员目前正致力于开发缓解这种破坏现象的方法和技术。降低饱和度是提高砂土抗液化能力的可靠方法,因为它直接影响地震作用时孔隙压力的积聚。本文综述了不同饱和度砂土中地震诱发液化的机理和评估,饱和度是降低液化现象触发的关键参数。此外,本文还介绍了一些新颖的方法,利用基于应力和基于能量的方法来解释不同饱和度的循环行为。汇编和讨论的实验结果表明,降低饱和度是增强土壤抗液化能力和降低相关风险的可行策略。此外,本文对周期性行为的解释为解释在几度饱和(可通过去饱和或诱导部分饱和技术实现)情况下量化抗液化能力的方法的可靠性提供了有价值的见解,有助于制定抵御地震引起的破坏的策略。
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
Earth-Science Reviews
Earth-Science Reviews 地学-地球科学综合
CiteScore
21.70
自引率
5.80%
发文量
294
审稿时长
15.1 weeks
期刊介绍: Covering a much wider field than the usual specialist journals, Earth Science Reviews publishes review articles dealing with all aspects of Earth Sciences, and is an important vehicle for allowing readers to see their particular interest related to the Earth Sciences as a whole.
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