資源描述：
《高墩小半徑曲線梁橋支點(diǎn)預(yù)偏心時(shí)力學(xué)性能分析》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、第31卷第2期工程抗震與加固改造Vol.31,No122009年4月EarthquakeResistantEngineeringandRetrofittingApr.2009[文章編號(hào)]100228412(2009)0220009207高墩小半徑曲線梁橋支點(diǎn)預(yù)偏心時(shí)力學(xué)性能分析1121滕 軍,胡 渝,郭時(shí)安,吳紅軍(11哈爾濱工業(yè)大學(xué)深圳研究生院,廣東深圳518055;21深圳市交通局,廣東深圳518055)[摘 要] 高墩小半徑曲線梁橋是具有復(fù)雜力學(xué)性能的空間結(jié)構(gòu)體系。為探尋高墩小半徑曲線梁橋的合理支承形式,以此來保證高墩小半徑曲線梁橋的安全,需要確保采用合理的支點(diǎn)預(yù)偏心。本文采用有
2、限元方法分析了曲線梁橋主要力學(xué)性能隨支點(diǎn)預(yù)偏心的變化規(guī)律,研究了曲率半徑及墩高對(duì)曲線梁橋支點(diǎn)預(yù)偏心前后力學(xué)性能的影響,探討了高墩和小半徑皆為曲線梁橋受力不利因素的原因。研究了支點(diǎn)預(yù)偏心方法減小高墩小半徑曲線梁橋主梁的扭矩、扭轉(zhuǎn)變形、墩頂彎矩、水平位移以及兩端雙支座豎向反力差的性能。研究結(jié)果表明:合理的支點(diǎn)預(yù)偏心方法可以減小曲線梁橋結(jié)構(gòu)的內(nèi)力、變形以及支座反力。高墩和小半徑皆為曲線梁橋的不利因素,對(duì)高墩小半徑曲線梁橋設(shè)置支點(diǎn)預(yù)偏心至關(guān)重要。[關(guān)鍵詞] 高墩;小半徑;曲線梁橋;支點(diǎn)預(yù)偏心;力學(xué)性能分析[中圖分類號(hào)]U448121[文獻(xiàn)標(biāo)識(shí)碼]AMechanicalCharacteristi
3、csAnalysisofSmallRadiusCurveBeamBridgewithPivotsPre2eccentricitywithHighPiers1121TengJun,HuYu,GuoShi2an,WuHong2jun(1.HarbinInstituteofTechnologyShenzhenGraduateSchool,Shenzhen518055,China;2.ShenzhenCommunicationBureau,Shenzhen518055,China)Abstract:Smallradiuscurvebeambridgewithhighpiersisaspatia
4、lstructuresystemwithcomplexmechanicalperformance.Inordertoresearchthereasonableformofbearingforthesafetyofthecongenerbridge,thereasonablepre2eccentricityofpivotswouldbeadopted.Inthispaper,therulesofthemechanicalcharacteristicsofcurvebeambridgewithpre2eccentricityofpivotsarestudiedwithfiniteeleme
5、ntmethod,theeffectoftheradiusandthatoftheheightofpiersonthemechanicalcharacteristicsofcurvebeambridgewithpivotspre2eccentricityarestudiedinthispaperaswell.ThereasonsforSmallradiusandhighpiersarebothdisadvantagesformechanicalcharacteristicsofcurvebeambridgearediscussedindetails.Moreover,theproper
6、tiesofthemethodofpivotspre2eccentricitytoreducethetorsionandtorsiondeformationofthebeam,themomentandhorizontaldisplacementofthepiersatthetopandthedifferenceofverticalreactionforceofthetwobearingsatthetwoendsarestudied.Theresultofresearchshows:thereasonablepre2eccentricityofpivotscanreducetheinte
7、rnalforceanddeformationandreactionforceofthecurvebeambridgestructure.Smallradiusandhighpiersarebothdisadvantagesformechanicalcharacteristics,itissoimportanttosetpre2eccentricityofpivotsforsmallradiuscurvedbeambridgewithhighp
