| 考虑土体不排水强度非平稳性对条形基础承载力影响的可靠度分析 |
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| 引用本文： | 严柏杨,张京伍,朱德胜,葛彬,舒爽.考虑土体不排水强度非平稳性对条形基础承载力影响的可靠度分析[J].河北工程大学学报,2021,38(1):20-25. |
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| 作者姓名： | 严柏杨 张京伍 朱德胜 葛彬 舒爽 |
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| 作者单位： | 河海大学 岩土力学与堤坝工程教育部重点实验室,江苏 南京210098;东华理工大学 土木与建筑工程学院,江西 南昌330013;扬州大学 建筑科学与工程学院,江苏 扬州225009 |
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| 基金项目： | 江西省桥梁结构重点实验室开放基金资助项目（JXBS202004）；江苏省自然科学基金青年基金资助项目（BK20180934） |
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| 摘 要： | 采用随机有限元方法对考虑土体不排水抗剪强度空间变异性的条形地基承载力进行可靠度分析.使用随机有限元结合蒙特卡罗模拟的方法,分析了不排水抗剪强度的非平稳程度和相关距离对承载力均值和标准差的影响,计算并对比了各种参数组合条件下基础的失效概率和安全系数.结果表明,随着土体不排水抗剪强度非平稳程度的不断提高,基础承载力也不断提...
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| 关 键 词： | 承载力 非平稳 不排水抗剪强度 随机有限元法 |
| 收稿时间： | 2020/11/2 0:00:00 |
Reliability Analysis of the Bearing Capacity of Strip Footings Considering the Non-stationary Characteristic of Soil Undrained Shear Strength |
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| Authors: | YAN Boyang ZHANG Jingwu ZHU Desheng GE Bin and SHU Shuang |
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| Affiliation: | Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing Jiangsu 210098, China,College of Civil and Architectural Engineering, East China University of Technology, Nanchang, Jiangsu 330013, China,College of Civil and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China,Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing Jiangsu 210098, China and Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing Jiangsu 210098, China |
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| Abstract: | Stochastic finite element method was used to analyze the reliability of the bearing capacity of strip footings considering the spatial variability of soil undrained shear strength. The influence of degree of non-stationarity and spatial correlation length on the mean and standard deviation of bearing capacity was analyzed by using stochastic finite element method combined with Monte Carlo simulation method. The failure probability and safety factor of foundation under various parameter combinations were calculated and coMPared. The results show that the bearing capacity of the strip footing increases with the increase of the degree of non-stationarity, and its bearing capacity decreases firstly and then increases with the increase of spatial correlation length. |
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| Keywords: | bearing capacity non-stationarity undrained shear strength random finite element method |
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