摘要
以跨径336m的下承式系杆拱桥为背景,对大跨钢系杆拱桥的拱脚节点局部受力进行有限元计算分析。针对拱脚局部受力存在的问题,提出四种构造优化方案并分别进行计算验证。根据验证结果对拱脚节点构造方式、钢板厚度、开洞位置、支座布置等进行优化。对日后类似的结构设计,尤其是拱肋和系梁腹板倾斜、腹板间距较大的系杆拱桥拱脚节点设计,具有一定的参考意义。
Taking a 336-m span through bowstring arch bridge as the background, this paper introduces the finite element calculation analysis on the local stress of arc springing node of long-span steel bowstring arch bridge. Aiming at the problems of local stress of arch springing, this paper four structural optimization schemes, and calculates and verifies these four schemes respectively. Based on the verified results, the construction mode of arch springing node, the steel plate thickness, the holing position and the support layout are optimized. The contents can provide the reference for the design of the similar structures, especially for the design of the arch springing node of the bowstring arch bridges with the inclined arch rib and straining beam web, and larger web spacing.
出处
《城市道桥与防洪》
2019年第6期104-107,M0012,共5页
Urban Roads Bridges & Flood Control
关键词
拱脚节点
大跨径
局部分析
优化
arch springing node
long span
local analysis
optimization
