平面L形高层建筑的扭转效应分析及对策

21120052StructuralEngineersVol.21,No.1Feb.2005L马升东周德源孙良宏(,200092)平面L形高层建筑结构的刚度中心与质量中心偏离较大,在水平地震作用下平移振动与扭转振动扭耦合分析由于耦合导致扭转效应动力增大的主要因素,并结合工程实例提出减少扭转效应的对策L形平面,高层建筑,耦合,扭转效应TorsionalAnalysisandCountermeasuresforHigh-RiseBuildingswithLShapePlanMAShengdong,ZHOUDeyuan,SUNLianghong(TongjiUniversity,Shanghai200092)AbstractTorsionalandlateralvibrationofahigh-risebuildingwithLshapeplanunderearthquakewillcouplebecauseoflargedistancebetweencenterofstiffnessandcenterofmass.Mainfactorstoenlargethetorsionalresponseinducedbycouplingactionareanalysed.Thecountermeasurestoreducethetorsionalef-fectareprovidedthroughtheexamples.KeywordsLshapeplan,high-risebuilding,couple,torsionaleffect119859,/0,,1[1],L,42%1976,L,,L:();,1(%)L42158152L[2]:[3]Hr/u:Hru=Hru(er,TtTl)(1),e/r,Tt/Tl,e/r,,,,,TtTlKt,Kl,MtMl:TtTl=MtKlKtMl(2)Tt,TlKt,Kl,,,,,TtTl,,Tt/Tl,Wilson[4],1,;1,;50%,,,100%,90%,L1[5],1LL,6)))1:12,2,;2:12,56(JGJ3-2002)L,L/Bmax=2,L,3;3:12,L,5;4:1,16,8;5:2,16,2128;6:3,16,3128EtabsPkpm,22:234#11###211521~6X(%)Y(%)(%)1T1T2T31.0880.01000.01.0590.01000.00.9181000.00.00.9501000.00.00.8610.00.01000.8500.00.01002T1T2T30.81744.144.211.70.85651.034.014.00.79550.050.00.00.81942.058.00.00.6555.45.489.20.6427.07.086.03T1T2T30.87484.01.015.00.842802.018.00.7673.093.83.20.7934.392.23.50.64611.94.983.20.65610.15.084.9X(%)Y(%)(%)4T1T2T31.1640.083.716.31.1261.277.821.00.8311000.00.00.8431000.00.00.7050.01.0990.7450.015855T1T2T31.06247.436.616.01.09245.040.015.01.02842.048.010.01.03440.049.011.00.6972.021.876.20.7348.025.067.06T1T2T31.14472.20.017.81.15465.02.033.00.9471.099.00.01.024089.011.00.59419.23.677.20.57415.02.083.0,,,2L,T1,T2,T3,,,,,T1,T2,T3,,,X,Y,,T1,,564.3.5/TtT10.850,,6,1,4~6,2,314~6L#12#StructuralEngineersVol.21,No.1StudyofDesignMethod,,15%,61~6(:m)3,15(48.80m),7(23.20m),7,1995,7,8,(l/b=3.32.0);1.26,7PK-PMPMSAP,,,9,333X(%)Y(%)(%)T11.5145.437.617.0T21.3142.046.012.0T31.2017.23.679.2T11.429.080.011.0T21.158910.01.0T30.793.019.0788(下转第17页)#13###211Mpa,6MPa;11.6MPa,4MPa;1(:MPa)16.9815.7812.6611.5411.011.69.268.625,,,,[1].MARC.:,2003[2]..:,2003(上接第13页)9:Tt/Tl=0.80,Tt/Tl=0.562,3,7,18%15%,7,10%15%,4L,,,,,[1].1985.,1987;4[2],..,2004;1[3],,..,2000;1[4]EdwardLWilson.ThreeDimensionalStaticandDy-namicAnalysisofStructure.ThirdEdition,Inc.2000[5],,..:,1993[6](JGJ3-2002).:,2002[7],,..,2004#17###211