欢迎来到天天文库
浏览记录
ID:36506575
大小:454.26 KB
页数:7页
时间:2019-05-11
《层间接触位置和状态对沥青路面力学指标的影响》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第40卷,第5期公路工程Vo1.40,No.52015年10月HighwayEngineeringOct..2015层间接触位置和状态对沥青路面力学指标的影响张争奇,张苛,罗要飞(长安大学特殊地区公路工程教育部重点实验室,陕西西安710064)【摘要】为研究沥青路面层间接触位置和接触状态对路面结构内力学指标的影响,选择典型的高速公路半刚性基层路面结构,利用BISAR3.0软件计算分析不同层间接触位置时的路面力学指标,并探讨不同基面层接触状态下沥青路面力学响应和疲劳寿命的变化规律。结果表明:面层与面层、面层与基层、基层与底基层之间在完全光滑时对拉应力、拉应变、剪应力影响显著,弯沉受层间
2、接触位置的影响变化不大;随着基面层间滑动系数的增加,路面结构内的应力、应变逐渐增大,在完全滑动时下面层底的拉应力、剪应力和拉应变分别是完全连续时的2.93倍、2.45倍和69.36倍;在基面层间滑动系数小于0.6时沥青路面的疲劳寿命降幅较小,随后降幅逐渐增大,当基面层间完全光滑时,疲劳寿命较完全连续时下降44.5%。[关键词]道路工程;沥青路面;层间接触位置;接触状态;力学指标;疲劳寿命[中图分类号]U414.1[文献标识码]A[文章编号】1674—0610(2015)05—0001—06InfluenceofInterlayerContactingSurfaceandConditi
3、ononMechanicalIndexesofAsphaltPavementZHANGZhengqi,ZHANGKe,LUOYaofei(KeyLaboratoryofHighwayEngineeringinSpecialRegionofMinistryofEducation,Chang’anUniversi—ty,Xi’an,Shanxi710064,China)[Abstract]Inordertostudytheinfluenceofinterlayercontactingsurfacesandconditiononme·chanicalindexofasphahpavemen
4、t,thepaperselectedtypicalsemi-rigidbasepavementstructureofex—pressway.ThepavementmechanicalindexesunderdifferentcontactingsurfacewerecalculatedbyBISAR3.0.Thechanginglawsofasphaltpavementmechanicalindexesandfatiguelifeunderdifferentcontac—tingconditionbetweenbaseandsurfacecoursewerediscussed.The
5、resultsshowthat:theinfluenceofsmoothconditionbetweensurfacecourses,surfacecourseandbase,baseandsubbaseontensilestress,tensilestrainandshearstressisprominent.Deflectionisslightlyaffectedbydifferentinterlayercontactingsurface.Thestressandstrainofpavementincreasegraduallywiththeincreasingofsliding
6、coeficientbe-tweenbaseandsurfacecourse.Thetensilestress,shearstressandtensilestrainoffollowinglayerundercompletelyslidingconditionare2.93times,2.45timesand69.36timesoffullycontinuousconditionre—spectively.Decreasingrangeoffatiguelifeissmallwhentheslidingcoeficientbetweenbaseandsurfacecourseisle
7、ssthan0.6.thendecreasingrangeincreases.Whenthebaseandsurfacecourseareincom.pletelysmooth.thefatiguelifedeclines44.5%.[Keywords]roadengineering;asphaltpavement;interlayercontactingsurface;contactingcondi—tion;mechanicalindex;fatigu
此文档下载收益归作者所有