Robust geotechnical design of soil-pile foundation system considering multiple failure modes

中国安全科学学报 Pub Date : 2020-06-28 DOI:10.16265/J.CNKI.ISSN1003-3033.2020.06.004

Du Xiuli, Cao Xiuxiu, Zhong Zilan, Hou Benwei, Wang Wei

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Abstract

In order to address uncertainties of geotechnical parameters and loads in pile foundation designꎬ firstlyꎬ a RGD method considering multiple failure modes was proposed. Four typical failure modesꎬ vertical ultimate limit state (ULS)ꎬ vertical serviceability limit state (SLS)ꎬ horizontal strength failure and horizontal deformation failure were analyzed. Thenꎬ Monte Carlo simulation (MCS) and point estimate method (PEM) nesting were adopted to compute mean value and standard deviation of failure probability for soil ̄pile foundation systemꎬ and the latter was used as an indicator to measure robustness. Finallyꎬ optimal design of soil ̄pile foundation system was finalized with robustness and cost as objectives. The results show that piles with different geometries have different dominant failure modes. With the increase of geometriesꎬ key failure mode changes from horizontal strength failure to vertical SLSꎬ which has significant influence on gradient of of system' failure probability. 中国安全科学学报 China Safety Science Journal 第30卷 2020年

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考虑多种破坏模式的桩土基础体系的鲁棒性设计

为了解决桩基设计中岩土参数和荷载的不确定性ꎬ首先ꎬ提出了一种考虑多破坏模式的RGD方法。然后采用ꎬ蒙特卡罗模拟(MCS)和点估计法(PEM)嵌套计算土桩基础系统失效概率的均值和标准差ꎬ，并将后者作为鲁棒性的衡量指标。最后以鲁棒性和成本为目标，完成了ꎬ土桩基础体系的优化设计。结果表明，不同几何形状的桩具有不同的主导破坏模式。《中国安全科学学报》第30期2020年版

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来源期刊

中国安全科学学报

CiteScore

1.30

自引率

0.00%

发文量

8733

期刊介绍： China Safety Science Journal is administered by China Association for Science and Technology and sponsored by China Occupational Safety and Health Association (formerly China Society of Science and Technology for Labor Protection). It was first published on January 20, 1991 and was approved for public distribution at home and abroad. China Safety Science Journal (CN 11-2865/X ISSN 1003-3033 CODEN ZAKXAM) is a monthly magazine, 12 issues a year, large 16 folo, the domestic price of each book is 40.00 yuan, the annual price is 480.00 yuan. Mailing code 82-454. Honors: Scopus database includes journals in the field of safety science of high-quality scientific journals classification catalog T1 level National Chinese core journals China Science and technology core journals CSCD journals The United States "Chemical Abstracts" search included the United States "Cambridge Scientific Abstracts: Materials Information" search included