摘要
针对土钉加固边坡未考虑边坡模糊随机性问题,提出考虑土体参数模糊随机性与边坡模糊过渡区间的土钉加固边坡可靠度计算方法。将土体样本试验力学参数随机值转换为模糊随机变量;在模糊随机变量与模糊过渡区间的基础上,建立模糊随机极限状态方程;确定土体参数不同λ-截集上下限及与之对应的边坡滑裂面;推导出仅与土体参数变量相关的土钉加固边坡可靠度计算公式,得到土钉加固边坡模糊随机可靠度。最后与传统蒙特卡洛模拟法计算出的可靠度进行对比得出:应用蒙特卡洛模拟计算出的失效概率为零时,考虑边坡模糊性后边坡失效概率为5.9%,表明考虑边坡模糊性与模糊过渡区间的加固边坡可靠度分析更能反映边坡实际状态。
With regard to the problem of no cosideration of the fuzzy randomness of slopes reinforced by soil nailing,a method for calculating the reliability of soil nailing-reinforced slopes is proposed considering the fuzzy randomness of soil parameters and the fuzzy transition interval of the slopes.Firstly,the random values of mechanical parameters for soil sample tests are converted into the fuzzy random variables.Based on the fuzzy random variables and the fuzzy transition interval,an equation for the fuzzy random limit state is established.The upper and lower limits of theλ-cut set and the corresponding slip surface of slopes are determined.Then,the formula for calculating the reliability of soil nailing-reinforced slopes only related to the soil parameter variables is derived,and the fuzzy random reliability of soil nailing-reinforced slopes is obtained.Finally,the calculated results are compared with those calculated by the traditional Monte Carlo simulation method.It is shown that the reliability analysis of reinforced slopes considering fuzzy transition interval and fuzzy randomness of soil parameters can better reflect the actual state of reinforced slopes.
作者
房光文
朱彦鹏
叶帅华
吴强
FANG Guang-wen;ZHU Yan-peng;YE Shuai-hua;WU Qiang(School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2021年第S01期122-126,共5页
Chinese Journal of Geotechnical Engineering
基金
教育部长江学者和创新团队支持计划项目(IRT_17R51)
国家自然科学基金项目(51978321,51768040)
兰州理工大学红柳优秀青年人才支持计划
关键词
土体参数
土钉
模糊随机性
模糊过渡区间
可靠度
soil parameter
soil nailing
fuzzy randomness
fuzzy transition interval
reliability
作者简介
房光文(1996—),男,博士研究生,主要从事支挡结构方面的研究。E-mail:fangguangwen1996@163.com;通信作者:叶帅华,E-mail:yeshuaihua@163.com
