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时间:2020-03-27
《半刚性基层沥青路面车辙特性分析.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28卷第6期2011年6月公路交通科技JournalofHighwayandTransportationResearchandDevelopmentVoL28No.6Jun.201l文章编号:1002—0268(2011)06—0014—05半刚性基层沥青路面车辙特性分析胡萌1,张久鹏2,黄晓明1(1.东南大学交通学院,江苏南京210096;2.长安大学公路学院,陕西西安710064)摘要:针对半刚性沥青路面的车辙特性,利用有限元软件ABAQUS模拟分析了连续变温温度场下不同路面结构车辙发展规律、沥青面层不同结构层的车辙比例及路面车辙与沥青层厚度的关系。结果表明:路面车辙的发展规律与
2、沥青混合料永久变形规律相似,同样表现出3阶段特性,同样并不存在严格意义上的等速阶段,只是在荷载作用次数的某一范围内,车辙发展速率基本保持恒定;不同结构组合的沥青路面车辙发展规律大致相同,即荷载作用初期车辙发展较快,随后车辙发展进入稳定增长阶段,但是荷载作用末期,车辙有可能加速发展,进入破坏阶段;中面层车辙所占比例远高于其他面层,应该重视提高中面层沥青混合料的抗车辙能力;对于半刚性沥青路面结构,路表车辙并非随厚度的增大成直线上升,其增幅随厚度的增大而逐渐变缓。关键词:道路工程;车辙特性;有限元;沥青路面;车辙比例;沥青层厚度中图分类号:13416.2心文献标识码:AAnalysisofR
3、uttingCharacteristicsofSemi—rigidBaseAsphaltPavementHUMeng‘,ZHANGJiupen92,HUANGXiaomin91(1.SchoolofTransportation,SoutheastUniversity,NanjingJiangsu210096,China;2.SchoolofHighway,Chang'anUniversity,Xi’anShaanxi710064,China)Abstract:Ruttingdevelopmentregularitiesofdifferentpavementstructures,rutt
4、ingproportionofdifferentasphaltlayersofsurfacecourseandtherelationshipbetweenruttingandasphaltlayerthicknesswereanalyzedwithfiniteelementsoftwareABAQUStostudyruttingcharacteristicsofsemi—rigidasphaltpavement.Theresultsshowthat(1)Ruttingdevelopmentissimilartothepermanentdeformationofasphaltmixtur
5、es.Italsorepresentsthreephrasesanddoesnotrepresenttheconstantspeedphrasepropedy.Ruttingdevelopmentspeedalmostremainsconstantonlyinacertainrangeofloadingcycles.(2)Ruttingdevelopmentregularitiesofdifferentpavementstructuresaresimilar,thatis,theinitialruttingdevelopsquickly,andruttingdevelopsstably
6、later,butruttingwillenterthedamagestagespeedilyattheend.(3)Ruttingproportionofintermediatelayerismuchhigherthantheotherlayers,andgreatattentionshouldbepaidtoimprovingruttingresistanceofasphaltmixtureatintermediatelayer.(4)Forsemi-rigidasphaltpavementstructure,therelationbetweenruttingandasphaltl
7、ayerthicknessisnotlinear,whereasruttingincreasegraduallyslowsdownwithincreasingthickness.Keywords:roadengineering;ruttingcharacteristic;finiteelement;asphaltpavement;ruttingproportion,asphaltlayerthickness。引言兰兰?霉萎塞蔫塞孟暮萋萎耋雾喜耋
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