拱肋倾角对中承式拱桥受力的影响  

STUDY ON THE INFLUENCE OF ARCH RIB INCLINATION ON THE BEARING BEHAVIOR OF LONG SPAN HALF THROUGH ARCH BRIDGE

作　　者：冯希训[1] 熊刚[1] 乔建刚[1] 

机构地区：[1]天津市市政工程设计研究院,天津300051

出　　处：《低温建筑技术》2017年第2期49-51,共3页Low Temperature Architecture Technology

摘　　要：大跨度中承式拱桥的拱肋有垂直拱肋、提篮拱肋及外倾拱肋之分,本文研究了不同的拱肋倾角对中承式拱桥受力特性的影响。拱肋外倾成蝶形拱对拱肋弯矩、稳定性不利,用于大跨度中承式拱桥时经济性较差;拱肋内倾的提篮拱桥,可在一定程度上改善拱桥的静力和稳定性能,分析表明拱肋内倾角在10°左右时最优。The arch rib of long span half through arch bridges can be divided into vertical arch rib, basket arch rib and extroversive arch rib. In this paper the effect of arch rib obliquity on stress characteristics of half through arch bridge is studied. A burrerfly shaped extroversive arch rib is very disadvantageous to arch rib bending moment and stability, when used for long span half through arch bridge the economy is poor. Internal inclined arch rib of basket arch bridges can improve the static force and stable performance of the bridge in a certain extent, analysis shows that when the arch rib angle is about 10° the performance achieves optimal.

关 键 词：中承式拱桥 内倾角 受力特性 稳定 

分 类 号：TU398[建筑科学—结构工程]