鹅城大桥主桥曲杆受力和中墩支座反力分析研究  

Analysis and Research on the Stress of Curved Bars and the Reaction Force at the Middle Pier Supports for the Main Bridge of Echeng Bridge

作　　者：孙兵 曲慧 赵佳男 SUN Bing;QU Hui;ZHAO Jianan

机构地区：[1]华东建筑设计研究院有限公司,上海200232 [2]同济大学建筑设计研究院(集团)有限公司,上海200092

出　　处：《上海公路》2024年第3期47-54,M0005,共9页Shanghai Highways

摘　　要：鹅城大桥位于广东省惠州市,主桥采用50 m+180 m+180 m+50 m=460 m四跨连续斜跨异型系杆拱桥。从景观需求出发,副拱之间通过曲杆进行连接,且为了增加曲杆的面内稳定,增设了曲杆之间的水平索。中墩处中间、鹅塔塔底采用钢塔与钢主梁、钢箱拱固结的形式。中墩梁底沿纵桥向设置2排支座,每排沿横桥向设置3个支座。现研究了曲杆间水平索的不同索力对曲杆和结构的受力影响,从而确定曲杆合理的受力状态,以增加曲杆的面内刚度,改善结构整体受力。此外,也研究了支座竖向刚度和支座反力的影响关系,进而确定了支座型号及特性。通过研究,可为曲杆结构设计和多支座选型布置提供依据。The Echeng Bridge,located in Huizhou City,Guangdong Province,features a 50 m+180 m+180 m+50 m=460 m four span continuous slanted span abnormal-shaped tied-rch bridge.To meet the landscape requirements,the secondary arches are connected by curved bars.In order to enhance the in-plane stability of the curved bars,horizontal cables are added between curved bars.At the middle pier,the base of the Swan Tower is fixed with steel towers,steel main beams,and steel box arches.Two rows of supports are set at the bottom of the middle pier beam along the longitudinal direction of the bridge,and three supports are set in each row along the transverse direction of the bridge.The influence of different cable forces on the internal force of curved bars and structures is studied by adding horizontal cables between curved bars.By analyzing different cable tensions,the reasonable stress state of curved bars is determined to enhance the in-plane stiffness of curved bars and improve the overall stress of the structure.In addition,the relationship between the vertical stiffness of the supports and the reaction force of the supports is examined to confirm the types and characteristics of the supports.This research can provide valuable insights for the design of curved bar structures,the selection and layout of multi-supports.

关 键 词：鹅城大桥 曲杆 水平索 支座刚度 支座反力 

分 类 号：U443.36[建筑科学—桥梁与隧道工程]