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ID:37349831
大小:5.51 MB
页数:70页
时间:2019-05-22
《沥青混合料疲劳损伤机理研究》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、重庆交通大学硕士学位论文沥青混合料疲劳损伤机理研究姓名:高爽申请学位级别:硕士专业:道路与铁道工程指导教师:朱洪洲20080401ABSTRACTFatiguecrackingisoneofmaindestructionformsofasphaltpavement.ResearchonfatigueperformanceofasphaltmixtureCanimprovetheanti-fatigueperformanceofasphaltmixtureandprolongtheservicelifeofasphaltpavement.Thephenomenologicalfa
2、tiguemodelismainlyusedtostudyasphaltmixturefatigueperformancebothindoorandabroad.Fatiguelifeisoftendifferentunderdifferenttestmethodsandtestconditionsforthesameasphaltmixture,whichwillaffecttheobjectivityofevaluation.Basedontheasphaltbeambendingfatigueexperimentsandthetheoryofasphaltfatigued
3、amage,thefatiguemechanismofasphaltmixtureWasexploredpreliminary,TheintrinsiclinkWasfoundbetweendifferenttestingmethods.Firstly,experimentsofconstantstressandstrainbeambendingfatigueunderdifferentconditionsforAC13,AC20,ATB25asphaltmixturewerecarriedon.Fatigueequationsofstress-fatiguelifeandst
4、rain—fatiguelifewereestablished.Andanalysisoftheimpactontheasphaltmixturefatiguelifeunderdifferentexperimenttemperatureandloadfrequency.Then,theflexibledamageparameterWasdefined,thefatigueevolutionregulationofasphaltmixtureintheprocessofdifferentfatigueexperimentsWasanalyzed.Itwasconsideredt
5、hattheasphaltmixturehasthefailureprocessfrommovingphase,stabilephasetoacceleratephase.FatigueprocessofasphaltmixturefromthepointoffatiguedamageWasanalyzedandnewfailurecriterionwasdefined.Finally,bytheoryanalysisandfatigueexperiments,thefatiguedamageequationofasphaltmixture,whichwasirrespecti
6、vewiththeexperimentconditionssuchasloadingcontrolmode,experimenttemperature,experimentloadingfrequencyandSOon,Wasestablished.KEYWORDS:asphaltmixture;fatiguelife;failurecriterion;mechanism;cumulativedamage;fatiguemodel重庆交通大学学位论文原创性声明本人郑重声明:所呈交的学位论文,是本人在导师的指导下,独立进行研究工作所取得的成果。除文中已经注明引用的内容外,本论文不
7、包含任何其他个人或集体已经发表或撰写过的作品成果。对本文的研究做出重要贡献的个人和集体,均已在文中以明确方式标明。本人完全意识到本声明的法律结果由本人承担。⋯一虢黟日期:脚年少月沙日重庆交通大学学位论文版权使用授权书本学位论文作者完全了解学校有关保留、使用学位论文的规定,同意学校保留并向国家有关部门或机构送交论文的复印件和电子版,允许论文被查阅和借阅。本人授权重庆交通大学可以将本学位论文的全部内容编入有关数据库进行检索,可以采用影印、缩印或扫描等复制手段保存和汇编本学位论文。糊⋯躲高疹日期:
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