文章编号：双层均布荷载作用下混凝土伸臂箱梁剪力滞效应试验研究与分析轮胎胎面与柔性路面摩擦接触的数值分析祝明桥黄晓明1，代琦1，平克磊2（1.湖南科技大学土木工程学院，湘潭411201东南大学交通学院，江苏南京210096；2.南京水利科学研究院，江苏，南京，210029）摘要：通过对大比例双层均布荷载作用下单箱三室混凝土伸臂箱梁在弹性范围内的抗弯性能模型试验研究与分析，探讨了双层均布荷载作用下单箱三室混凝土伸臂箱梁剪力滞效应分布规律，得出了一些有益的结论，为面向双层交通混凝土箱梁设计、应用，提供了试验数据和理论依据。为了深入研究轮胎胎面与路面的抗滑性能，应用有限元软件ANASYS建立了包括橡胶胎面和柔性路面结构的有限元模型。探讨了车辆处于自由滚动和紧急制动过程中在不同轮胎/路面界面摩擦系数下的胎面、路表的变形特性和接触应力分布状态。研究结果表明界面摩擦系数是影响胎面与柔性路面摩擦性能的主要原因，随其值的增加路面弯沉减小，摩擦应力先增加然后保持稳定，但轮胎的磨耗增加，接触压应力增加。适当地丰富路表构造、提高界面摩擦系数能降低路面弯沉，增强紧急制动状态下的抗滑性能；但是当摩擦系数超过某临界值时，随其数值的增大所对应制动状态下的抗滑性能不再提高，且路面压应力明显增加。以上摩擦特性对路表抗滑性能和路面力学响应的研究提供了一定的理论基础。关键词：双层均布荷载道路工程；混凝土伸臂箱梁抗滑；剪力滞效应数值分析；试验研究接触应力；有限元分析界面摩擦系数中图分类号：文献标识码：AExperimentResearchandAnalysisontheShearlageffectofCantileverConcreteBoxGirderunderDouble-deckuniformloadsNumericAnalysisofFrictionContactbetweenTreadandflexiblepavementZHUHUANGXiao-Mming-qiao1,DAIQi1,JIANGKe-lei2(1.Hunanuniversityofscienceandtechnology,Xiangtan411201,ChinaSchoolofTransportation,SoutheastUniversity,NanjingJiangsu210096,China;NanjingHydraulicResearchInstitute,NanjingJiangsu210029,China)Abstract:Throughtheexperimentresearchandanalysisontheflexuralbehaviorwithinelasticrangeofthesingleboxthreeroomscantileverconcreteboxgirdermodelunderlargeproportionofdouble-deckuniformloads,discussedtheshearlageffectdistributionlawofthesingleboxthreeroomscantileverboxgirderunderdouble-deckuniformloads.Someusefulconclusionsaredrawn，providetheexperimentaldataandtheoreticalbasisfordoubledecktrafficconcreteboxgirderdesignandapplication.Forthesakeofresearchingtheskidresistanceconcretelybetweentreadandpavement,afiniteelementanalysismodelincludingrubbertreadandflexiblepavementwasestablishedbyFEMsoftwareANASYSandfrictioncontactproblembetweentreadandflexiblepavementisnumericallyanalyzed.Thedeformationalfeaturesoftreadandsurfaceanddistributionoftangentstressintheconditionsofdifferentinterfacialfrictioncoefficientsbetweentreadandsurfaceunderfreelyrollingandemergentbrakingstateswerediscussed.Theresultsshowthat,theinterfacialfrictioncoefficienttakesthemainresponsibilityforfrictionpropertiesbetweentreadandflexiblepavement;withincreasingoftheinterfacialfrictioncoefficient,thedeflectionofpavementdecreases,frictionstressimprovesfirstlyandthenkeepstability;butbothoftirewearandcontactpressureincreases.Aggrandizingthetextureofpavementandincreasingtheinterfacialfrictioncoefficientbetweentreadandsurfacecanreducethedeflectionofpavementeffectivelyandimprovetheskidresistanceofpavementunderemergentbrakingstateswhichareadvantageoustopavement.Butasthefrictioncoefficientexceedsacertaincriticalvalue,theskidresistancecorrespondingundertheemergentbrakingstatesdoesn’tenhanceanylonger,andthepressureofpavementaugmentsobviouslywhicharedisadvantageoustopavement.Therebythesefrictionpro...