防灾减灾工程学报2018，Vol.38Issue(1)：56-64,9.DOI:10.13409/j.cnki.jdpme.2018.01.008
基于NORTA相关随机数的岩质边坡可靠性仿真评估
Reliability Simulation Analysis of Rock Slope in Terms of NORTA Correlation Random Number
摘要
Abstract
A reasonable representation of stochastic uncertainties is a key part in the reliability assessment of rock slope.Normal To Anything (NORTA) is a rapid generation algorithm of multidimensional random vector with any marginal and feasible correlation matrix.Taking the reliability of the Sau Mau Ping rock slope stability as an example,NORTA was applied to generate correlated random numbers with specified marginal and correlation coefficients.Then,the instability probability of the Sau Mau Ping rock slope was estimated for typical cases using the Monte Carlo Simulation (MCS) procedure.The limitations of the approach,the randomness of the simulation results and the estimation approach for sample size based on the control of variation coefficient were also discussed.Results showed a remarkable difference of the instability probability between the natural case considering the dependency and the case ignoring the dependency for the Sau Mau Ping rock slope.In addition,with the increase of the algebraic value of correlation coefficients between cohesion and frication angle or/and between tension crack depth and degree of filling water,the instability probability of the Sau Mau Ping rock slope increased gradually as well.关键词
秀茂坪岩坡/NORTA/可靠性评估/相关随机数Key words
Sau Mau Ping rock slope/NORTA/reliability assessment/correlation random number分类
建筑与水利引用本文复制引用
周生通,孙元元..基于NORTA相关随机数的岩质边坡可靠性仿真评估[J].防灾减灾工程学报,2018,38(1):56-64,9.基金项目
华东交通大学校立科研基金载运工具与装备教育部重点实验室资助项目(15JD06)、国家自然科学基金项目(51505146)、江西省自然科学基金项目(20161BAB216135)资助 （15JD06）
