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时间:2020-05-01
《公路平曲线半径可靠性设计理论与方法.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第12卷第6期交通运输工程学报Vo1.12NO.62O12年l2月Journal0fTrafficandTransportationEngineeringDee.2012文章编号:167l一1637(2012)060001-06公路平曲线半径可靠性设计理论与方法游克思。,孙璐,顾文钧(1.东南大学交通学院,江苏南京210096;2.美国天主教大学土木工程系,华盛顿特区20064;3.上海市政工程设计研究总院(集团)有限公司,上海200092)摘要:将车辆运行速度、路面摩擦因数作为随机变量,分别构建了基于质点模型与考虑车
2、辆侧倾作用的侧滑失效功能函数,分析了曲线路段行车安全可靠性。计算了《公路工程技术标准》(JTGB012OO3)中规定的各极限最小半径下发生车辆侧滑的概率,并通过改变路面摩擦因数和车辆运行速度,对比研究了2种不同功能函数下的行车失效概率,提出了公路平曲线半径的可靠性设计流程。研究结果表明:考虑车辆侧倾作用计算的侧滑概率明显高于由质点模型计算出的侧滑概率;在同样道路环境下,卡车发生侧滑的概率会大于轿车;公路平曲线设计将车辆简化为质点,忽略侧倾作用以及车型间差异会导致对卡车行驶安全不利。关键词:道路工程;平曲线半径;可靠性设
3、计;运行速度;路面摩擦因数中图分类号:U412.34文献标志码:AReliabilitydesigntheoryandmethodofhighwayhorizontalcurveradiusY()UKesi,SUNLU~,GUWen—iun'(1.SchoolofTransportation,SoutheastUniversity,Nanjing210096,Jiangsu,China;2.DepartmentofCivilEngineering,TheCatholicUniversityofAmerica,Washi
4、ngtonDC20064USA;3.ShanghaiMunicipalEngineeringDesignInstitute(Group)Co.,Ltd.,Shanghai200092,China)Abstract:Vehiclerunningspeedandpavementfrictioncoefficientwereconsideredasrandomvariables.Twoperformancefunctionsofvehicleskiddingfailuresbasedonqualitypointmodelan
5、dconsideringrollmotionwereproposed,andthesafetyreliabilityofvehiclemovingoncurveroadwasanalyzed.TheskiddingprobabilityofeachhorizontalCUrVewithlimitingminimumradiusrecommendedbyTechnicalStandard0_厂HighwayEngineering(JTGB012003)wascalculated,thefailureprobabiliti
6、esoftwoperformancefunctionswerecomparedbyvaryingpavementfrictioncoefficientandvehiclerunningspeed,andthereliabilitydesignflowofhorizontalcurveradiuswaspresented.Analysisresultindicatesthatskiddingprobabilitycalculatedbytheperformancefunctionconsideringrollmotion
7、islargerthanthatcalculatedbyqualitvpointmodel。andtruckiSmorevulnerabletoskidthancaronthesameroadenvironment.Vehicleissimplifiedasqualitypoint,rollmotionandvehicletypedifferenceareignoredinthehorizontalcurvedesign.theseareadversetotrucksafety.5tabs,6figs,17refs.K
8、eywords:roadengineering;horizontalcurveradius;reliabilitydesign;runningspeed;pavementfrictioncoefficientAuthorresumes:Y()UKe~si(1985一),male,doctoralstudent,+86—258379
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