摘要
为研究钢管混凝土拱桥的动力特性,以黑龙江省哈同公路依兰牡丹江拱桥为例,应用大型有限元软件ANSYS建立了8种结构形式组合的拱桥空间有限元模型。在不同结构形式下,以匀速移动常量力作用在桥面上来模拟车辆对桥梁的强迫振动,得到了跨中截面和拱顶截面的竖向、横向位移以及加速度响应的极值;并得到了拱顶截面和1/4拱肋截面的动内力极值,分析出各种结构形式对桥梁强迫振动特性的影响,为改善大跨度中承式钢管混凝土拱桥的动力性能提供理论依据。
In order to study dynamic behaviors of concrete-filled steel tubular （CFST） arch bridge, taking the engineering of Yilan Mudanjiang bridge in Hatong highway as an example, the bridge space finite-element models of eight structure combined forms are constructed using the large-scale finite-element software Ansys. Under different structure united forms, the bridge forced vibration is simulated by even speed moving constant force imposing on bridge deck. The vertical and horizontal displacement of the section of middle span and vault are got. And the internal force of the section of middle span and 1/4 span are got. The dynamical performances of the structure influenced by different structure types are analyzed, which could provide theoretic reference for the improvement of large span middle-supported concrete-filled steel tubular arch bridge dynamic characteristic.
出处
《现代交通技术》
2008年第3期32-35,共4页
Modern Transportation Technology
关键词
钢管混凝土
拱桥
动力性能
结构形式
concrete-filled steel tubular
arch bridge
dynamic performance
structure type
