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1、第34卷第4期公路交通科技Vol．34No．42017年4月JournalofHighwayandTransportationResearchandDevelopmentApr．2017doi:10．3969/j．issn．1002-0268．2017．04．003溫度場(chǎng)對(duì)連續(xù)配筋混凝土路面縱向配筋的影響1,21212王驍帆,應(yīng)正兵,劉朝暉,蘇穎奇,李盛(1.浙江省交通規(guī)劃設(shè)計(jì)研究院,浙江杭州310006;2.長(zhǎng)沙理工大學(xué)公路養(yǎng)護(hù)技術(shù)國(guó)家工程實(shí)驗(yàn)室,湖南長(zhǎng)沙410004)摘要:現(xiàn)行規(guī)范對(duì)連續(xù)配筋混凝土
2、路面(CRCP)進(jìn)行縱向配筋設(shè)計(jì)時(shí),對(duì)溫度場(chǎng)考慮不全面,鋼筋埋深處的最大溫差未考慮板厚和配筋位置的影響,且溫度梯度與材料熱力學(xué)性質(zhì)的關(guān)系也不明確。針對(duì)這些不足,依據(jù)“潭耒高速公路”的結(jié)構(gòu)和相關(guān)氣象數(shù)據(jù),以傳熱學(xué)和熱彈性力學(xué)為基礎(chǔ),用FORTRAN語言定義了熱流和外界溫度的子程序,用ABAQUS模擬了CRCP的高、低溫季節(jié)溫度場(chǎng),并用實(shí)測(cè)溫度對(duì)計(jì)算進(jìn)行驗(yàn)證,分析了板厚、配筋位置和材料熱力學(xué)性質(zhì)對(duì)最大溫差、溫度梯度的影響,計(jì)算了最大溫差的減小對(duì)縱向配筋的影響。主要結(jié)論有:溫度梯度具有周期性;最大溫度梯度隨
3、板厚增加而減小;最大溫差隨鋼筋埋置深度的增加而減小,配筋指標(biāo)隨之減小;混凝土熱傳導(dǎo)率對(duì)正溫度梯度影響明顯。關(guān)鍵詞:道路工程;連續(xù)配筋混凝土路面;有限元;配筋設(shè)計(jì);溫度場(chǎng)中圖分類號(hào):U416．222文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1002-0268(2017)04-0016-09EffectofTemperatureFieldonLongitudinalReinforcementofContinuouslyReinforcedConcretePavement1,21212WANGXiao-fan,YINGZhe
4、ng-bing,LIUZhao-hui,SUYing-qi,LISheng(1.ZhejiangProvincialInstituteofCommunicationsPlanning,DesignandResearch,HangzhouZhejiang310006,China;2.StateEngineeringLaboratoryofHighwayMaintenanceTechnology,ChangshaUniversityofScienceandTechnology,ChangshaHunan4
5、10004,China)Abstract:TemperaturefieldisnotfullyconsideredforthelongitudinalreinforcementdesignofCRCPincurrentspecification.Whilstdeterminingthemaximumtemperaturedropatthedepthofsteels,itignorestheprimaryfactorsinvolvingslabthicknessandthereinforcementpo
6、sition,andtherelationshipbetweentemperaturegradientandthermo-dynamicalpropertiesofpavementmaterialsisnotclearfordesignpurpose.Aimingattheseproblems,thesubroutineofbothheatfluxandambienttemperaturewhichcomefromthestructureofXiangtan-Leiyangexpresswayandr
7、elatedmeteorologicaldataaredefinedintermsoftheoriesofheattransferandthermo-elasticitybyusingFORTRANlanguage.ThetemperaturefieldsofCRCPforbothsummerandwinteraresimulatedbyABAQUS,andthenthecalculatedtemperaturefieldisverifiedbycomparingwiththemeasureddata
8、.Theinfluenceofslabthickness,reinforcementposition,andthermo-dynamicalpropertiesofpavementmaterialsonthemaximumtemperaturedropandthetemperaturegradientarediscussed.Theeffectthatresultsfromthedecreaseinthemaximumtemperaturedropont
