澳门澳凼第三大桥斜拉桥地震反应分析.pdf
21卷1期世界地震工程Vol.21,No.1
2005年3月WORLDEARTHQUAKEENGINEERINGMar.,2005
文章编号:(2005)01008106
澳门澳凼第三大桥斜拉桥地震反应分析
龙晓鸿李黎唐家祥
(华中科技大学土木工程与力学学院,湖北武汉430074)
摘要:结合一座澳门澳凼第三大桥斜拉桥的工程设计实例,采用大型有限元分析程序ANSYS,选取空
间BEAM188、BEAM4及SHELL63单元建立动力计算模型,对比研究了主塔墩底在假定固结和考虑桩
土共同工作这两种边界约束处理方式下的动力特性;并选取三条地震波在桥的纵、横向分别进行桥梁
地震作用下的时程分析,给出了主梁和中塔的内力、位移及时程响应。
关键词:斜拉桥;动力特性;时程分析法;地震反应;有限元
中图分类号:TU435文献标识码:A
Seismicresponseanalysisoncablestayedbridgeof
thethirdAodangbridgeinMacao
LONGXiaohongLILiTANGJiaxiang
(SchoolofCivilEngineeringMechanics,HuazhongUniversityofSci.Tech.,Wuhan,Hubei430074,China)
Abstract:Inthispaper,takinganengineeringdesigncaseaboutacablestayedbridgeofthethirdAodangbridge
asanexampleinMacao,thedynamiccalculatingmodelofthecablestayedbridgeiscreatedbythefiniteelement
analysisprogramANSYS.Thedynamiccharacteristicofthecablestayedbridgisdiscussedandiscomparedunder
twodifferentboundaryconditions,thatis,thefixedendisassumedandtheinteractionofpicketsoilisconsidered
forthebottomofthebridgetower.Inaddition,atimehistoryanalysisisconductedforthecablestayedbridgesub
jectedtothreeearthquakewavesinthelongitudinalandthelateraldirection,respectively.Theinternalforce,dis
placementandthetimehistoryresponseofthemainbeamandmidtowerareobtained.
Keywords:cables