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1、橋梁建設(shè)2012年第42卷第3期(總第213期)BridgeConstruction，Vo1．42，No．3，2012(TotallyNo．213)57文章編號(hào)：1003—4722(2012)03—0057—06-_．】同tj墩大跨連續(xù)剛構(gòu)橋施工控制參數(shù)敏感性分析馬顯紅，余毅(1．貴州高速公路開發(fā)總公司，貴州貴陽550004；2．中鐵大橋局集團(tuán)武漢橋科院有限公司，湖北武漢430034)摘要：為研究高墩大跨連續(xù)剛構(gòu)橋施工控制參數(shù)的敏感性，以貴州烏江特大橋?yàn)槔捎肕IDASCivil軟件建立該橋三維有限元模型，計(jì)算施工監(jiān)控過程中各主要參數(shù)的取值對(duì)結(jié)構(gòu)線形和內(nèi)力的影響。計(jì)算分析結(jié)果
2、表明，混凝土節(jié)段重量、收縮徐變、溫度荷載等參數(shù)對(duì)該橋施工控制精度有顯著影響，混凝土彈性模量參數(shù)的影響比較明顯，預(yù)應(yīng)力參數(shù)敏感程度相對(duì)較低。在施工控制過程中，應(yīng)及時(shí)收集節(jié)段混凝土容重、彈性模量等參數(shù)，根據(jù)實(shí)際施工時(shí)間歷程考慮收縮徐變效應(yīng)的影響，并對(duì)計(jì)算模型加以修正；在設(shè)置預(yù)拱度和監(jiān)測(cè)數(shù)據(jù)測(cè)量時(shí)，要充分考慮到溫度對(duì)橋梁的線形及應(yīng)力的影響。關(guān)鍵詞：連續(xù)剛構(gòu)橋；施工控制；參數(shù)；敏感性分析；有限元法；容重；彈性模量中圖分類號(hào)：U448．23文獻(xiàn)標(biāo)志碼：AAnalysisofParameterSensitivityofConstructionControlofHigh—RisePieran
3、dLongSpanContinuousRigid—FrameBridgeMAXian-hong，YUI1／(1．GuizhouExpresswayDevelopmentCorporation，Guiyang550004，China；2．BridgeScienceResearchInstituteLtd．，ChinaRailwayMajorBridgeEngineeringGroup，Wuhan430034，China)Abstract：Tostudytheparametersensitivityofconstructioncontrolofthehigh—risepierand
4、longspancontinuousrigid—framebridge．a(chǎn)WujiangRiverBridgeinGuizhouwascitedasanex—ample，thesoftwareMIDASCivilwasusedtosetupthethree—dimensionalfiniteelementmodelforthewholebridgeofthebridgeandtheinfluencesoftheselectedvaluesofallprincipalparame—tersintheprocessoftheconstructioncontrolonthegeome
5、tricshapeandinternalforcesofthestructurewerecalculatedandanalyzed．Theresultsofthecalculationandanalysisshowthattheparametersliketheweight，shrinkage，creepandtemperatureloadoftheconcretesegmentshavesignificantinfluenceontheaccuracyoftheconstructioncontrol，theinfluenceoftheparameteroftheconcret
6、eelasticmodulusisobviousandthedegreeofparametersensitivityoftheprestressingisrelativelylow．Intheprocessoftheconstructioncontrol，theparametersoftheunitweightandelasticmodulusoftheconcreteshouldbetimelycollectedandthemodelshouldbecorresponding—lyupdatedinaccordancewiththeconstructiontimehistor
7、yandinconsiderationoftheinfluenceoftheshrinkageandcreep．Whentheprecamberissetandthemonitoringdataaremeasured，theinfluenceoftemperaturesonthegeometricshapeandstressofthebridgeshouldbefullytakenin—toaccount．Keywords：continuousrigid—framebridge；constr
