摘要
佛山富龙西江特大桥主桥为(69+176+580+176+69)m双塔双索面混合梁斜拉桥,全宽41.4 m(含风嘴)。该桥采用半飘浮体系,桥塔下横梁设置竖向支座及横向抗风支座,塔梁间设置纵向阻尼器。桥塔采用融入佛山文化性与地域性特征的“白鹭”形桥塔。主梁采用混合梁,边跨为混凝土箱梁;中跨为超高性能混凝土(UHPC)组合梁,由高3.1 m的槽形钢主梁和带PBL剪力键的UHPC组合桥面板构成。斜拉索采用∅7 mm锌铝合金镀层平行钢丝斜拉索,标准抗拉强度1770 MPa。桥塔墩采用钻孔灌注桩基础,辅助墩和过渡墩均采用分幅式板式墩。建立该桥的空间有限元模型进行静、动力分析,结果表明:该桥整体静力性能、抗风及抗震性能均符合规范要求。
The main bridge of Fulong Xijiang River Bridge in Foshan,which is a two-pylon hybrid girder cable-stayed bridge,is arranged in five spans of 69,176,580,176,and 69 m,with a total deck width of 41.4 m(including wind fairings).The bridge belongs to a semi-floating system,where there are vertical bearings and wind bearings installed on the lower crossbeams of the two pylons,as well as longitudinal dampers installed between the pylons and the superstructure.The pylons resemble"egrets"that are a typical cultural and local symbol of Foshan.The side spans consist of concrete box girders,while the main span is comprised of 3.1 m-deep steel trough girders and UHPC panels,with the two connected by PBL connectors.The stay cables,which are composed of Zn-Al alloy coated parallel steel wires of 7 mm diameter,with a nominal tensile strength of 1770 MPa,are fanned out in double cable planes.The pylons are supported by bored pile foundations,while the auxiliary and transition piers are separated sheet piers.A spatial finite element model of the bridge was developed for static and dynamic analysis.The results demonstrate that the overall static performance,wind resistance and seismic responses of the bridge meet the code requirements.
作者
李兵
姚云龙
郭立成
洪宝宁
LI Bing;YAO Yunlong;GUO Licheng;HONG Baoning(Foshan Transportation Investment Group Co.,Ltd.,Foshan 528041,China;College of Civil Engineering and Transportation,Hohai University,Nanjing 210098,China)
出处
《桥梁建设》
EI
CSCD
北大核心
2023年第6期127-134,共8页
Bridge Construction
关键词
斜拉桥
半飘浮体系
桥塔
UHPC桥面板
静动力分析
桥梁设计
cable-stayed bridge
semi-floating system
pylon
UHPC deck panel
static and dynamic analysis
bridge design
