九曲河提篮拱桥受力特性研究

Research on Behavior of the Jiuqu River X-arch Bridge

以我国京沪高速铁路上第一座提篮拱桥———京沪线九曲河提篮拱桥为背景 ,对提篮拱桥做了比较详尽的受力特性分析 ,对提篮拱桥的两个常见的计算模型做了比较 ,指出了平面模型的合理性 ;同时 ,讨论了横撑的位置和数目对提篮拱桥的稳定性和自振特性的影响 .

Based on the Jiuqu River X-arch bridge in the high-speed railway line running from Beijing to Shanghai,the first of its kind,a detailed behavioral analysis of the Jiuqu River X-arch bridge is carried out.A comparison between two different models often used in the behavioral analysis is made,and as a result,it is concluded that the planar model sometimes is reasonable. In the same time,the effects of the lateral braces in different position and of different numbers on the stabilities of the bridge as well as on its natural frequencies are discussed.