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