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首页> 外文期刊>Applied Mathematical Modelling >Numerical optimization applying trust-region reflective least squares algorithm with constraints to optimize the non-linear creep parameters of soft soil
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Numerical optimization applying trust-region reflective least squares algorithm with constraints to optimize the non-linear creep parameters of soft soil

机译：应用带约束条件的信赖域反射最小二乘算法优化软土非线性蠕变参数的数值优化

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摘要

Determination of the creep model parameters is a challenging task particularly when a non-linear elastic visco-plastic (EVP) model is adopted, mainly due to the limited test duration as well as the assumption of the reference time. Therefore, this paper presents an innovative numerical solution to find the EVP model parameters applying the trust-region reflective least square optimization algorithm. The developed approach involves several available laboratory consolidation test results in the optimization procedure with the adopted commencing time to creep as a unit of time. In this paper, the laboratory results of Ottawa clay were employed to demonstrate the limitation of the recent method to obtain model parameters. Furthermore, the developed method is verified against Skci-Edeby clay in the laboratory conditions. The EVP model parameters are obtained by applying the developed method to the available laboratory consolidation results of clay samples. The analysis results of vertical strains and excess pore water pressures demonstrate that the developed method can be a feasible tool to estimate the settlement properties of clays.
机译：蠕变模型参数的确定是一项艰巨的任务，特别是在采用非线性弹性粘塑性（EVP）模型时，这主要是由于有限的测试持续时间以及假定参考时间。因此，本文提出了一种创新的数值解决方案，即使用信任区域反射最小二乘优化算法来找到EVP模型参数。所开发的方法在优化过程中涉及了几个可用的实验室合并测试结果，并采用了以时间为单位的开始时间。本文利用渥太华粘土的实验室结果证明了最新方法获得模型参数的局限性。此外，在实验室条件下针对Skci-Edeby粘土对开发的方法进行了验证。通过将开发的方法应用于粘土样品的可用实验室固结结果，可以获得EVP模型参数。竖向应变和超孔隙水压力的分析结果表明，所开发的方法可以作为估算粘土沉降特性的可行工具。

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  • 来源
    《Applied Mathematical Modelling》 |2017年第1期|236-256|共21页
  • 作者

    Thu Minh Le; Behzad Fatahi; Hadi Khabbaz; Wenjing Sun;

  • 作者单位

    Centre for Built Infrastructure Research, School of Civil and Environmental Engineering, Faculty of Engineering and IT, University of Technology, Sydney, 15 Broadway, Ultimo, NSW 2007, Australia;

    Centre for Built Infrastructure Research, School of Civil and Environmental Engineering, Faculty of Engineering and IT, University of Technology, Sydney, 15 Broadway, Ultimo, NSW 2007, Australia;

    Centre for Built Infrastructure Research, School of Civil and Environmental Engineering, Faculty of Engineering and IT, University of Technology, Sydney, 15 Broadway, Ultimo, NSW 2007, Australia;

    Department of Civil Engineering, Shanghai University, Shanghai 200072, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Optimization; Creep; Soft clay; Model parameters;

    机译：优化;蠕变;软粘土;型号参数;

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