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Finite element-based reliability assessment of quay walls

机译：基于有限元的码头墙的可靠性评估

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摘要

While reliability methods have already been widely adopted in civil engineering, the efficiency and robustness of finite element-based reliability assessments of quay walls are still fairly low. In this paper, the reliability indices of structural and geotechnical failure modes of two real-life quay walls are determined by coupling probabilistic methods with finite element models, taking into account a large number of stochastic variables. The reliability indices found are within the range of the targets suggested in the design codes presently in use. Nevertheless, neglecting model uncertainty and correlations between stochastic variables leads to an underestimation of the probability of failure. In addition, low sensitivity factors are found for time-independent variables, such as material properties and model uncertainty. Furthermore, the results are used to reflect on the partial factors used in the original design. Important variables, such as the angle of internal friction, are subjected to a sensitivity analysis in order to illuminate their influence on the reliability index. Port authorities and terminal operators might be able to use the findings of this paper to derive more insight into the reliability of their structures and to optimise their service life and functionality, for example by deepening berths or increasing operational loads.
机译：虽然在土木工程中已经被广泛采用可靠性方法，但码头墙的有限元可靠性评估的效率和稳健性仍然相当低。在本文中，通过耦合具有有限元模型的概率方法来确定两个现实码头壁的结构和岩土故障模式的可靠性指标，考虑到大量随机变量。找到的可靠性指数在目前在使用中的设计代码中建议的目标范围内。然而，忽略了随机变量之间的模型不确定性和相关性导致低估失败的可能性。此外，找到低灵敏度因子对时间无关的变量，例如材料属性和模型不确定性。此外，结果用于反映原始设计中使用的部分因素。重要的变量，例如内部摩擦角度，进行灵敏度分析，以照亮它们对可靠性指标的影响。港口当局和终端运营商可能能够使用本文的调查结果来探视其结构的可靠性，并优化其使用寿命和功能，例如通过深化泊位或增加运营负荷。

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  • 来源
    《Georisk》 |2021年第3期|165-181|共17页
  • 作者

    A. A. Roubos; T. Schweckendiek; R. B. J. Brinkgreve; R. D. J. M. Steenbergen; S. N. Jonkman;

  • 作者单位

    Department of Hydraulic Engineering Delft University of Technology Delft Netherlands;

    Department of Hydraulic Engineering Delft University of Technology Delft Netherlands;

    Department of Hydraulic Engineering Delft University of Technology Delft Netherlands;

    Department of Structural Engineering Ghent University Ghent Belgium;

    Department of Hydraulic Engineering Delft University of Technology Delft Netherlands;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Quay wall; reliability; finite elements; partial factors;

    机译：码头墙;可靠性;有限元;部分因素;

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