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超星·期于 刘用男 GaH高善R然路热木ooG 文章编号:1674-8247(2018)01-0006-04 分项系数与目标可靠指标的关系及其应用 罗一农王占盛郭海强 (中铁二院工程集团有限责任公司。成都610031) W出4释辈口,降整红华工母乡·客程2专接时多6用条梦红g,4月肝当出¥:证4 分项系数和目标 可靠性设计 州可指 时应关系 指导规范 论,1 系数 给出适用条正 3)工程设计规 可给出对应的目标可靠指标:(4)在实际工程设计中,建议特殊设计采用可靠指标进行设 关键词:可靠性设计标准(规范):可靠指标:分项系数:铁路工程 中图分类号:U213.152 文献标志码:A Relationship between Partial Factor and Reliability Index and Its Application LUO Yinong WANG Zhansheng GUO Haiqiang (China Railway Eryuan Engineering Croup Co .Ld. Chengdu 610031,China) Abstract:Based on the concepts and math meanings of reliability index and partial factor,the relationship between reliability index and partial safety factor is analyzed.and applications of them in engineering design are concluded.It is necessary to clarify the relationship between reliability index and partial safety factor in Unified Standard for Reliability Design of Engine ring Structures (the first level)and Unified Standard for Reliability Design of Railway Engin nd level) aswell asthe functions of them in design ode state safety factor are positively correlated under certain conditions:(2)Application conditions should be given for caleulation formula of reliability index and partial factor in the unified standard of reliable design to eliminate errors due to correlation:(3)Partial factor should be given for engineering design code.and corres onding reliability index can be given;(4)In the actual engineering design,it is better to adopt reliability index for irregular design,By contrast,it is er to adopt partial I design. Key words:reliability design standard code);reliability index;partial factor;railway engineering 自2010年以来,中国铁路部门大力开展铁道工程专业基于概率论的极限状态设计研究,实现设计标准 收稿日期:20170502 :中铁二院院计 018.91):6-9 6 2018年 2月 第 9卷 第 1期 高 速 铁 路 技 术 HIGHSPEEDRAILWAYTECHNOLOGY No.1,Vol.9 Feb.2018 收稿日期:2017-05-02 作者简介:罗一农(1964-),女,教授级高级工程师。 基金项目:中铁二院院计划(kyy2016060(16-17)) 引文格式:罗一农,王占盛,郭海强.分项系数与目标可靠指标的关系及其应用[J].高速铁路技术,2018,9(1):6-9. LUOYinong,WANGZhansheng,GUOHaiqiang.RelationshipbetweenPartialFactorandReliabilityIndexandItsApplication[J].HighSpeed RailwayTechnology,2018,9(1):6-9. 文章编号:1674—8247(2018)01—0006—04 分项系数与目标可靠指标的关系及其应用 罗一农 王占盛 郭海强 (中铁二院工程集团有限责任公司, 成都 610031) 摘 要:本文从可靠指标与分项系数的概念和数学含义出发,分析了分项系数与可靠指标的关系;归纳总结 了分项系数和目标可靠指标在工程设计中的应用;提出了在《工程结构可靠性设计统一标准》(第一层次标 准)和《铁路工程结构可靠性设计统一标准》(第二层次标准)中应明确分项系数和可靠指标的对应关系,以及 在结构或构件的极限状态设计规范(第三层次规范)中分项系数和目标可靠指标的作用,以指导规范的编制 和工程设计。研究的结论:(1)分项系数与可靠指标正相关应满足一定的条件;(2)可靠性设计统一标准中可 靠指标和分项系数计算公式应给出适用条件并补充完善,才能消除由于相关性带来的误差;(3)工程设计规 范应给出分项系数,可给出对应的目标可靠指标;(4)在实际工程设计中,建议特殊设计采用可靠指标进行设 计,常规设计采用分项系数进行设计。 关键词:可靠性设计标准(规范);可靠指标;分项系数;铁路工程 中图分类号:U213.152 文献标志码:A RelationshipbetweenPartialFactorandReliabilityIndex andItsApplication LUOYinong WANGZhansheng GUOHaiqiang (ChinaRailwayEryuanEngineeringGroupCo.,Ltd.,Chengdu 610031,China) Abstract:Basedontheconceptsandmathmeaningsofreliabilityindexandpartialfactor,therelationshipbetween reliabilityindexandpartialsafetyfactorisanalyzed,andapplicationsoftheminengineeringdesignareconcluded.Itis necessarytoclarifytherelationshipbetweenreliabilityindexandpartialsafetyfactorinUnifiedStandardforReliability DesignofEngineeringStructures(thefirstlevel)andUnifiedStandardforReliabilityDesignofRailwayEngineering (thesecondlevel),aswellasthefunctionsofthemindesigncodeofultimatestateofstructuresorcomponents(the thirdlevel)toguidethecompilationofcodesandengineeringdesign.Studyresult:(1)Reliabilityindexandpartial safetyfactorarepositivelycorrelatedundercertainconditions;(2)Applicationconditionsshouldbegivenforcalculation formulaofreliabilityindexandpartialfactorintheunifiedstandardofreliabledesigntoeliminateerrorsdueto correlation;(3)Partialfactorshouldbegivenforengineeringdesigncode,andcorrespondingreliabilityindexcanbe given;(4)Intheactualengineeringdesign,itisbettertoadoptreliabilityindexforirregulardesign,Bycontrast,itis bettertoadoptpartialfactorforconventionaldesign. Keywords:reliabilitydesignstandard(code);reliabilityindex;partialfactor;railwayengineering 自 2010年以来,中国铁路部门大力开展铁道工程 专业基于概率论的极限状态设计研究,实现设计标准 ChaoXing
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