摘要
通过建立钢管混凝土拱桥有限元模型,详细研究了横撑布置方式对钢管混凝土拱桥动力特性的影响,结果表明:钢管混凝土拱桥主拱面外基频低于面内基频;横撑变化对其面外频率影响较大,但对面内频率几乎无影响;拱顶横撑与1/4跨处横撑对主拱的动力特性影响较大,拱脚横撑对主拱动力特性的影响不明显。
In the light of the finite element model, the influence of different transverse brace arrangements on the dynamic characteristics of CFST arch bridges is studied in the paper. The results show that the hasic modal frequency of out-plane is lower than that of in-plane, and the frequencies of out-plane are seriously influenced by the change in the transverse brace arrangements while the frequencies of in-plane are little in- fluenced; furthermore, the transverse braces at arch crown and 1/4 span have a remarkable effect on the dynamic characteristics of the main arch, but the effect of the transverse braces located at arch springing is not so marked.
出处
《国防交通工程与技术》
2007年第2期43-45,共3页
Traffic Engineering and Technology for National Defence
关键词
钢管混凝土
拱桥
横撑布置
动力特性
CFST
arch bridge
transverse brace arrangement
dynamic characteristics
