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.
出处
《低温建筑技术》
2017年第2期49-51,共3页
Low Temperature Architecture Technology
关键词
中承式拱桥
内倾角
受力特性
稳定
half through arch bridge
internal inclination angle
stress characteristics
stability
