CCTV新台址主楼施工过程结构内力和变形分析-刘学武

CCTV刘学武郭彦林张庆林刘禄宇(100084):CCTV,,,,CCTV,,,:CCTVANALYSISOFINTERNALFORCEANDDEFORMATIONFORTHENEWCCTVHEADQUARTERSDURINGTHECONSTRUCTIONPROCESSLiuXuewuGuoYanlinZhangQinglinLiuLuyu(DepartmentofCivilEngineering,TsinghuaUniversityBeijing100084)Abstract:ThenewCCTVheadquartersconsistsoftwotowersleaning6offverticalinbothdirections,atremendous14-story-highcantileverjoiningtwoleaningtowersatthetopanda9-story-highpodiumatthebottom.Differentconstructionprocedureswillleadtodifferentinternalforceanddeformationdistributionduringtheconstructionprocessinthiscomplexsteelstructure.Theywillbelockedwithinthestructureandhavetobeconsideredinthestructuraldesign.Itisevidentthatthereisagreatdifferenceininternalforceanddeformationdistributionbetweenaccordingtodesignmodelonetimeloadingandaccordingtostep-by-stepconstructionprocess.Anditisnecessarytotakereasonableconstructionproceduresandmeasurestoguaranteetheinternalforceanddeformationoftheconstruction-completedstructuretomeettherequirementgivenbydesigners.ItispresentedtheinternalforceanddeformationanalysisoftheCCTVnewheadquartersduringtheconstructionprocessbyemployingnonlinearfiniteelementmethod,andtheinternalforceanddeformationdistributionlockedinthestructureisdetermined.Lotsofnumericalresultshavebeenobtainedasguidelinesfortheerectionandconstructionoftheproject.Keywords:newCCTVheadquartersconstructionprocessinternalforcedeformation:19775E-mail:[e-mail]:2007-05-28,,1996CCTVCCTV,,,,,,,,,,,,,,,,,,22IndustrialConstructionVol37,No9,2007工业建筑2007年第37卷第9期,,,,,,,,,[1],,,,,[2,3]ANSYSCCTV,,,1CCTV93(5249)14L,,47m2,125t,6,234m194m1622m(37),67165m75165m,56m,148t,3738-,1355m,,,,SRC,SRC,2,,,,,,,,,,14,,:(1),,,:,,,;:,,:(1),L,L,:,,;:L,L,L,,,,1Fig.1Scheme1andscheme2:(23CCTV新台址主楼施工过程结构内力和变形分析刘学武,等2),,:,,;:,,,,,,,,,,,a-;b-;c-2Fig.2Theerectionofthecantileverinscheme3,(),,,,,(),33Fig.3Positionofdelaymembersinthestructure3,ANSYS,,,,,,,:1)Ke:Ked=Ke(1),=10-n,,Ped=0,;Ked;Ped2),,,:KT=Keb+Ked(2),Keb:P=Peb(3),Peb:KTu=P(4),,,3),,,Keb,P4,,,,24工业建筑2007年第37卷第9期,(),(),[3]4CCTV3:,,,,,:,,,,:[3],,,[4],,4([3]10)4Fig.4Partalnodalnumbersofthestructure,,,,,,,,,,,,,(5),5Fig.5Deformationtrendofthestructureduringtheconstructionprocess516,F022,,1,:1)1,,,,,,,1,,2)3,1,,,3,3)24,,,,4)21661结构施工成型内力分析,25CCTV新台址主楼施工过程结构内力和变形分析刘学武,等a-1;b-2;c-3;d-4F02;F10;F22;F35;F4561Fig.6Axialstressofsomemembersontower1duringtheconstructionprocess7,:1);,,2)1,4,2,,;,,,2;13,1,33)21a-1;b-21-1;2-2;3-3;4-4;5-5;6-6;7-7;8-87Fig.7Axialstressofsomemembersontower62结构一次成型内力分析,,,,8,:a-1;b-21-1;2-2;3-3;4-45-5;6-6;7-7;8-88Fig.8Axialstressofsomemembersontower26工业建筑2007年第37卷第9期1),2)1,2,4,1,3;24,3)2163两种成型情况下结构内力对比9,,:1)48,,,,,,26a-1;b-21-1;2-2;3-3;4-45-5;6-6;7-7;8-89Fig.9Axialstressdifferencesofsomemembersontowerbetweentwoanalysismethods2)15(),100MPa3)48(),-65MPa,4)2367,,,-35MPa5)8,,,,6),,,,64延迟构件分析,313:1);2);3)12(F36)236,,,,,1Table1ComparisonofaxialstressamongsomedelayedmembersMPa2(F36)-16781981-8998301-163619904(F36)-12323044-4574551-93678136(F32)-1326849-8052496-146018978(F32)-10428559-3441068-9301631771施工过程中结构变形的变化,,,,,,411~410,:1),,27CCTV新台址主楼施工过程结构内力和变形分析刘学武,等a-1;b-2;c-3;d-41-1,X;2-1,Y;3-1,Z;4-2,X;5-2,Y;6-2,Z;7-3,X;8-3,Y;9-3,Z;10-4,X;11-4,Y;12-4,Z;13-5,X;14-5,Y;15-5,Z;16-6,X;17-6,Y;18-6,Z;19-7,X;20-7,Y;21-7,Z;22-8,X;23-8,Y;24-8,Z;25-9,X;26-9,Y;27-9,Z;28-10,X;29-10,Y;30-10,Z;31-11,X;32-11,Y;33-11,Z;34-12,X;35-12,Y;36-12,Z101Fig.10Deformationoftower1duringtheconstructionprocess,XY,,;Z,1,,,2~42),,,,,X,,;Y,;Z,13,1,243)1XY,Z,,,,4)21,,,(25),XYZ(11)1-X;2-Y;3-Z1125Fig.11Displacementsofnode25inthecantilever72不同成型情况下结构变形的对比1125(25),(2)2,1:;2:,;3:;4:,,,28工业建筑2007年第37卷第9期2Table2Displacementscomparisonofkeyjointsmm15UXUYUZUXUYUZUXUYUZ128211-5-31-222-373-44-266235081-66-59-324-40158-181-4133218-142-67137-110-5499-55-3154-282-115312223-734426681),,,,2)CCTV,,,2468,,3),,4),,1..,2001,34(3):41-462,,..,2006,23(5):83-883,,,.CCTV.,2007,37(9):16-214,,,.:[].:,20065,,.CCTV.,2007,37(9):30-34(92),,,,,,,,,[6],,3),,,41)2);3)4),RCM,,:RCM,,,,,,,,,1.(CCES-01-2004).:,2004:29-322JTGTB07-01-20063..,2002,5(2):147-1544,,..:2005:224-2285,,.RCM.,2006(1):100-1036..,2006,28(5):45-4729CCTV新台址主楼施工过程结构内力和变形分析刘学武,等