摘要
研究目的:虎跳门特大桥主桥是广珠铁路工程中的一个重大项目,主拱采用两管平行单管提篮内倾三肢桁架拱的新型结构。通过对拱肋内倾角、提篮内倾单管空间位置、不同类型横撑、拱肋截面等稳定性能影响因素研究,为该类型拱桥的优化设计提供技术支持,供今后类似工程参考。研究结论:提篮内倾单管内倾角度的增大有利于提高拱桥的稳定性能;单管空间位置对拱桥稳定性影响很小;拱脚处设置"K"撑对提高结构的稳定性非常必要;"米"撑、"K"撑对横向稳定性能的影响差别不大;增大拱肋截面对提高拱肋的横向稳定性影响很小。
Research purposes： The main bridge of HuTiaomen River Bridge is one of the major projects of the Guangzhou -Zhuhai Railway;Main arch is a new structure of truss- arch with three tubes included parallel two -tubes and basket handle inclination of one - tube. Various influence factors were studied, including inclination of the arch ribs, spatial position of the basket handle one - tube, different types of crossbars and cross - sections of the arch ribs, thus making a optimal design and providing reference to the similar works in future. Research conclusions： The augmentation of the basket handle inclination of one - tube＇ s sloping angle is beneficial to improve the stability of the arch bridge, while the spatial position of one - tube has little effects on it. Besides, the design of K - type crossbar at the impost of arch is very necessary, which greatly improve the stability of whole bridge structure. However, there is no marked distinction on the structural stability between 米 - type crossbar and K - type crossbar. Increasing the cross - section of arch ribs has little effects on improving their transversal stability.
出处
《铁道工程学报》
EI
北大核心
2012年第6期50-54,共5页
Journal of Railway Engineering Society
关键词
单管提篮内倾
稳定性能
三肢
桁架拱
横撑
basket handle inclination of one - tube
three tubes
truss arch
stability
crossbar
