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1、第8卷第2期交通運(yùn)輸工程學(xué)報(bào)Vol.8No.22008年4月JournalofTrafficandTransPortationEngineeringApr.2008文章編號(hào):1671一1637(2008)02一0059一06連續(xù)配筋混凝土路面早期裂縫劉寒冰‘,張?jiān)讫垼?,魏志剛?l.吉林大學(xué)交通學(xué)院,吉林長春13。。22;2.吉林省高等級(jí)公路建設(shè)局,吉林長春13002”摘要:為了準(zhǔn)確計(jì)算連續(xù)配筋混凝土路面早期裂縫的分布和發(fā)展規(guī)律,基于鋼筋混凝土間粘結(jié)滑移的非線性本構(gòu)關(guān)系,采用接觸理論,建立了連續(xù)配筋混凝土路面在溫度變
2、化和混凝土干縮情況下的有限元?jiǎng)偠确匠蹋贸隽擞?jì)算早期裂縫寬度和裂縫間距的有限元解。研究了混凝土抗拉強(qiáng)度、彈性模量的變化、施工季節(jié)、配筋率和鋼筋直徑等因素對(duì)連續(xù)配筋混凝土路面早期裂縫的影響。計(jì)算結(jié)果表明:混凝土抗拉強(qiáng)度與彈性模量隨齡期的變化對(duì)連續(xù)配筋混凝土路面的早期裂縫在澆筑完成后28d內(nèi)影響顯著,隨著齡期的增加逐漸趨于穩(wěn)定,配筋率和配筋方式對(duì)早期裂縫的影響較大,為控制早期裂縫的發(fā)展,采用小直徑多根數(shù)的配筋方式較為合理,且最好在秋季施工。關(guān)鍵詞:道路工程;連續(xù)配筋混凝土路面;早期裂縫;接觸單元;非線性分析中圖分類號(hào):U
3、416.216.2文獻(xiàn)標(biāo)識(shí)碼:AEarlycrackofcontinuouslyreinforcedconcretePavementLiuHan一bing,,Zhangyun一longl,WeiZhi一gangZ(1.SchoolofTransportation,JilinUniversity,Changchun130022,Jilin,China;2.High一ClassHighwayConstructionBureauofJilinProvince,Changchun130021,Jilin,China)Abst
4、ract:Inordertoaccuratelycalculatethedistributionanddevelopmentlawsofearlycrackforcontinuouslyreinforcedconcretepavement(CRCP),thenonlinearbond一sliprelationbetweenreinforcedsteelbarandconcretewasanalyzed,thefiniteelementstiffnessequationofCRCPwasestablishedbyusi
5、ngcontacttheoryunderthecircumstancesoftemperaturechangeanddryshrinkageofconcrete,thefiniteelementsolutionsofcrackwidthandcrackspacewereobtained,andtheeffectsofconcretetensilestrength,elasticmoduluschange,constructionseason,reinforcementratioandsteelbardiametero
6、nearlycrackwerestudied.Calculationresultshowsthatthechangesofconcretetensilestrengthandelasticmodulushaveagreaterimpactonearlycrackwithin28dafterconcretepouringcompletion,theimpactisgraduallystablewiththeincreaseofconcreteage;thereinforcementratioandreinforceme
7、ntmodealsohaveagreatimPactonr一earlycrack,m沮tiplestrandsmall一diameterreinforcementmodeismorereasonableforthecontrolofearlycrack,anditisbetterthatconstructionseasonisautumn.sfigs,11refs.Keywords:roadengineering;continuouslyreinforcedconcretepavement;earlycrack;co
8、ntactelement;nonlinearanalysisAuthorresume:LiuHan一bing(1957一),male,professor,+86一431一85095446,liuhb57@sina.CO丈11。Cn.收稿日期:2007一09一02墓金項(xiàng)目:吉林省交通科技項(xiàng)目(2o04413)作者簡介:劉寒冰(1957一),男,吉