层间作用对水泥混凝土路面结构受力影响分析

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1、分类号U414密级单位代码10618学号03250221毒廑交通名謦硕士学位论文论文题目：层闻作用对水泥混凝土路面结构受力影响分析AffectedbyInterfacialInteraction研究生姓名：周乾导师姓名、职称：杨锡武教授申请学位门类专业名称：论文答辩臼期学位授予单位工学道路与铁道工程答辩委员会主席：吴国雄评阅人：周进J2006年4月摘要ABSTRACTInourcountry,concretepavement’smileageisincreasedveryfast．Butprematuredet

2、eriorationaecrgesinapplication．Heavyandovcrloadisdeemedasthemainreasontocausethedamageofpavement．InordertoknowtheStreSSmechanismofcem．entpavementstructureclearly,theeffectofinterfaceconditionsoncementpavementstructureisanalyzedbyFEAtechniquesinthispaper．Inth

3、ispaper,thecontacttheoryandthemethodofsolvingnonlinearequationsandinterfaceelementarcsummarized．Thefeatllreofcontactingelementandtheselectionofnaturalparametera∞recommended．Baseonthistheory,thelhree—finitemodelinelasticconditionissimulatod，andthee盎06"tofinte

4、rfaceconditionsoncementpavementstmctare’sload吐把ssandtemperaturestressisanalyzed．Tberesultofnumericalanalysisindicatedthat：1．Whentheinterfaceconnectionofcementconcretepavementisincondition，e11hancedgrengthofsemi-rigidbasecourschasevidentlyroletodecreasethestr

5、essthatonthebottomofI'oadslabanddeflectioninthecenterofroadslab．Forexample．ifthemodulusofbasecour∞isenhanced1000Mpa,thestsessthatonthebottomoftheroadslabisminished20percent．andthedeflectionthatinthecenterofrodeslabissmaller5percentthanever．Thishaseconomicben

6、efitindesign．2．Continuumpavementstructureismoresuscepfivetoheavyloadthanslick-disconnectedpavementstructure．neresearchindic眦that．averageamplificationofflexural-tensilestressthatonthehase-cmu'se’sbottomis0。15Mpapertonincontinuumpavementstructure．andO．2Mpapert

7、oninslick-disconnectedpavementstructure．Theinterfaceeffectonconerete-pavcment’sstressshouldbeconsideredinthedesign．3．hthecourseofconstructionandmaintenance．hase-coarseandinterfacehaveeffectonthermalstressofcementconcmtepavement．Socalculationmethodthatcontrol

8、lingStreSSofdi：ying-shrinkageisproposed．Thishasguiding-significancetoconstructionandmaintenanceofconcretepavement．Keywords：CementconcIe她pavement；Interfacialinteraction；Three-dim删onfiniteelement；