重载作用下自平衡拱桥下部结构分析与设计  

Mechanical Analysis and Design of Substructure of Self-balancing Arch Bridge under Heavy Load

作　　者：王义[1] 梁诏斌[1] 韦春陆[1] 江闪闪 WANG Yi;LIANG Zhao-bin;WEI Chun-lu;JIANG Shan-shan(Nanjing Municipal Design and Research Institute Co.Ltd.,Nanjing 210000,China)

机构地区：[1]南京市市政设计研究院有限责任公司,南京市210000

出　　处：《公路》2020年第11期154-158,共5页Highway

摘　　要：自平衡拱桥形式优美,可实现小矢跨比条件下的大跨度布置,在缺乏可靠岩体基础的平原地区较为适用。出于建设城市景观桥的要求,城市桥梁的上部建筑使用这种桥型也越来越普遍。城市桥梁在设计中需要考虑上部重载的影响。自平衡拱桥上下部结构为一整体,结构内部外部均为高次超静定形式,桥梁上部重载对桥梁上部结构和下部结构产生的效应较为复杂。结合某自平衡拱桥,针对结构特点,分析了该桥在大型桥面建筑重载作用下的结构状况,着重分析了下部结构的力学反应并进行了优化设计,最后总结了改型桥梁下部结构的力学特点。研究结果对类似桥型的结构设计具有一定的指导意义。The self-balancing arch bridge has a beautiful form,which can realize the layout of large span under the condition of small rise span ratio.It is more suitable for the plain area lacking the foundation of reliable rock mass.With the requirements of building urban landscapes,the superstructure of urban bridges are becoming more and more common,and the influence of upper heavy loads needs to be considered in the design of urban bridges.The superstructure and substructure of the self-balancing arch bridge is as a whole and the internal and external parts of the structure are all in high-order statically indeterminate forms.The effects of heavy loads on the superstructure and substructure of the bridge are complex.Based on the structural characteristics of the self-balancing arch bridge,in this paper the structural condition of the bridge under the heavy load of large deck construction;the mechanical reaction of the lower substructure is emphatically analyzed and carried on the optimization design.Finally,the mechanical characteristics of the modified bridge substructure are summarized,which has certain guiding significance for the structural design of similar bridges.

关 键 词：自平衡拱桥 重载 下部结构 设计技术 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]