摘要
香港汀九大桥是一座结构新颖的三塔四索面双桥面斜拉桥，其动力特性可为大桥的抗风分析提供重要的信息和必要的研究基础．本文首先根据河九大桥的结构特点建立了大桥的三维有限元动力计算模型，其中采用了双三主梁模型来简化桥面系结构；然后采用有限元程序ＳＡＰ８４对大桥的动力特性进行了分析，获得了大桥的自振频率和振型．本文结果与采用未经简化的模型获得的结果吻合较好，说明了本文动力模型的可靠性和实用性．
The Hong Kong Ting Kau Bridge is a cable-stayed bridge with three towers, four cableplanes and two bridge decks. The dynamic behavior of the bridge may provide imPOrtantinformation and essential research basis for the wind-induced vibration analysis of the structure.In this paper, a 3-D finite element model is first established, in which two triple-girder modelshave been adopted to simplify the bridge decks. Free vibration analysis is then carried out by thefinite element program SAP84, and the frequencies and mode shapes of the bridge are obtained.The results agree quite well with those obtained by the unsimplified model. This indicates that themodel established in this paper is reliable and practical.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1999年第11期29-35,共7页
Journal of South China University of Technology(Natural Science Edition)
基金
香港政府路政署及广东省自然科学基金!980634
