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1、第33卷第5期公路交通科技Vol．33No．52016年5月JournalofHighwayandTransportationResearchandDevelopmentMay2016doi:10．3969/j．issn．1002-0268．2016．05．010行車荷載引起橋梁振動(dòng)對(duì)新老混凝土黏結(jié)性能影響121魏建軍,付智,張金喜(1.北京工業(yè)大學(xué)交通工程重點(diǎn)實(shí)驗(yàn)室,北京100124;2.交通運(yùn)輸部公路科學(xué)研究院,北京100088)摘要:為了確定在混凝土早齡期時(shí)受到行車荷載引起橋梁振動(dòng)對(duì)新老混凝
2、土黏結(jié)面抗拉性能的影響,采用峰值振動(dòng)加速度為0．08g,0．16g,0．32g,3種振動(dòng)能量,分別模擬輕、中、重3種交通狀態(tài)引起的橋梁振動(dòng),對(duì)處于早齡期的新老混凝土黏結(jié)面進(jìn)行振動(dòng)試驗(yàn)。試驗(yàn)結(jié)果表明:振動(dòng)發(fā)生在初凝前,3種形式的交通(輕、中、重)引起的振動(dòng)對(duì)新老混凝土黏結(jié)面早期抗拉強(qiáng)度有增加作用。振動(dòng)發(fā)生在初凝至終凝階段,輕交通引起振動(dòng)對(duì)新老混凝土黏結(jié)面的強(qiáng)度影響不明顯;中等和重交通會(huì)造成黏結(jié)面早期抗拉強(qiáng)度(7d以前)下降。振動(dòng)發(fā)生在終凝后,輕交通引起的振動(dòng)對(duì)新老混凝土黏結(jié)面的強(qiáng)度影響不明顯;中等交
3、通的振動(dòng)會(huì)造成黏結(jié)面早期強(qiáng)度的下降;重載交通會(huì)造成黏結(jié)面的強(qiáng)度整體下降。關(guān)鍵詞:道路工程;橋梁修復(fù)混凝土;試驗(yàn)研究;新老混凝土黏結(jié)性;行車荷載引起的振動(dòng)中圖分類號(hào):U443．33文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1002-0268(2016)05-0061-05EffectofTrafficLoadInducedBridgeVibrationonAdherenceofNewandOldConcrete121WEIJian-jun,FUZhi,ZHANGJin-xi(1.KeyLaboratoryofTraf
4、ficEngineering,BeijingUniversityofTechnology,Beijing100124,China;2.ResearchInstituteofHighway,MinistryofTransport,Beijing100088,China)Abstract:Inordertotestifytheeffectoftrafficvibrationinducedbridgevibrationonthetensilepropertyoftheadherenceofnewando
5、ldconcreteduringearlyageofconcrete,avibrationtestonsuchadherenceisconducted.Inthetest,thevibrationenergywhosepeakaccelerationvaluesare0．08g,0．16gand0．32gareusedtosimulatethebridgevibrationsinducedbylight,middleandheavytrafficrespectively.Thetestresult
6、showsthat(1)whenvibrationsoccurredbeforeconcreteinitialsetting,allthe3levelsoftrafficinducedvibrationcanenhancetheearlyagebondstrengthofnewandoldconcrete;(2)whenvibrationsoccurredbetweeninitialsettingandfinalsetting,lighttrafficinducedvibrationhaslitt
7、leeffectonthebondstrength,middleandheavytrafficinducedvibrationscandecreasetheearlyage(before7d)bondstrength;(3)astotheadherenceofnewandoldconcretewhenvibrationoccurredafterconcretefinialsetting,lighttrafficinducedvibrationhaslittleeffectonthebondstre
8、ngthofnewandoldconcrete,itsearlyagebondstrengthdescendsundermiddletrafficinducedvibration,anditsbondstrengthdropslargelywithheavytrafficinducedvibration.Keywords:roadengineering;bridgerepairconcrete;experimentalstudy;adherenceofnewandoldconcre
