异型系杆拱桥关键设计参数分析  

Analysis on Key Design Parameters of Special-shaped Bowstring Arch Bridge

作　　者：刘鹏 LIU Peng

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海市200092

出　　处：《城市道桥与防洪》2022年第8期68-71,M0010,共5页Urban Roads Bridges & Flood Control

摘　　要：与常规的系杆拱桥结构布置形式不同,异型系杆拱桥吊杆采用放射型斜吊杆,斜吊杆集中锚固在拱顶,梁部重量通过斜吊杆非均匀作用在主拱上,主拱受力与常规拱桥有异。以某座位于城市核心区的异型系杆拱桥为例,对该桥的矢跨比、主拱刚度及纵、横梁布置形式等参数进行设计分析,研究该类型系杆拱桥的受力机制和设计特点,明确了该类型桥梁关键设计参数的取值原则,可为同类型桥梁结构体系设计提供参考。Different from the conventional structural layout of bowstring arch bridge, the boom of the special-shaped bowstring arch bridge is a radial inclined boom. The inclined booms are centralized and anchored at the top of arch. The weight of the beam is acted on the main arch unevenly by the inclined boom. The stress of the main arch is different from that of the conventional arch bridge. Taking a special-shaped bowstring arch bridge located in the urban core as an example, the rise-span ratio, main arch stiffness, longitudinal and transverse beam layouts and the other parameters of the bridge are designed and analyzed. The stress mechanism and design features of this type of bowstring arch bridge are studied.The value principle of the key design parameters of this type of bridge is clarified, which can provide a reference for the design of the similar bridge structure systems.

关 键 词：异型系杆拱桥 关键设计参数 矢跨比 主拱刚度 纵、横梁布置形式 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]