典型文献
System reliability evaluation of long railway subgrade slopes considering discrete instability
文献摘要：
This paper develops a dual-indicator discrete method (DDM) for evaluating the system reliability per-formance of long soil subgrade slopes. First, they are seg-mented into many slope sections using the random finite element method, to ensure each section statistically contains one potential local instability. Then, the k-out-of-n system model is used to describe the relationship between the total number of sections n , the acceptable number of failure sec-tions m , the reliability of sections Rsec , and the system reli-ability Rsys . Finally, m and Rsys are jointly used to assess the system reliability performance. For cases lacking spatial data of soil properties, a simplified DDM is provided in which long subgrade slopes are segmented by the empirical value of section length and Rsec is substituted by that of cross-sections taken from them. The results show that (1) DDM can provide the probability that the actual number of local instabilities does not exceed a desired threshold. (2) Rsys decreases with increasing n or decreasing Rsec ; that is, it is likely to encounter more local instabilities for longer or weaker subgrade slopes. n is negatively related to the hori-zontal scale of fluctuation of soil properties and positively related to the total length of subgrade slopes L . (3) When L is sufficiently large, there is a considerable opportunity to meet local instabilities even if Rsec is large enough.
文献关键词：
中图分类号：
作者姓名：
Wensheng Zhang;Qiang Luo;Tengfei Wang;Qi Wang;Liangwei Jiang;Dehui Kong
作者机构：
School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Department of Civil and Environmental Engineering,Harbin Institute of Technology,Shenzhen 518055,China;MOE Key Laboratory of High-Speed Railway Engineering,Southwest Jiaotong University,Chengdu 610031,China
文献出处：
引用格式：
[1]Wensheng Zhang;Qiang Luo;Tengfei Wang;Qi Wang;Liangwei Jiang;Dehui Kong-.System reliability evaluation of long railway subgrade slopes considering discrete instability)[J].铁道工程科学（英文）,2022(04):482-493
A类：
Rsec,Rsys
B类：
System,reliability,evaluation,railway,subgrade,slopes,considering,discrete,instability,This,paper,develops,dual,indicator,method,DDM,evaluating,system,soil,First,they,are,into,many,sections,using,random,finite,element,ensure,each,statistically,contains,one,potential,local,Then,out,model,used,describe,relationship,between,total,number,acceptable,failure,Finally,jointly,assess,performance,For,cases,lacking,spatial,data,properties,simplified,provided,which,segmented,by,empirical,value,length,substituted,that,cross,taken,from,them,results,show,can,probability,actual,instabilities,does,not,exceed,desired,threshold,decreases,increasing,decreasing,likely,encounter,more,longer,weaker,negatively,related,hori,zontal,scale,fluctuation,positively,When,sufficiently,large,there,considerable,opportunity,meet,even,enough
AB值：
0.497804
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