摘要
大跨度钢结构能为高铁车站带来较大的站内空间,但在长期高速列车振动荷载作用下,较柔的大跨度焊接钢结构的振动疲劳问题却不容忽视。则针对某客运专线"桥建合一"火车站,建立其整体有限元模型,计算分析了大跨度钢结构主拱V撑、网壳、下弦节点、柱角铸钢点以及主拱的动力响应,得到了不同部位最大Mises等效应力。计算分析表明:高速列车振动荷载对大跨度钢结构强度的影响可忽略不计,但长期疲劳问题不容忽视。
Large- span steel structure can provide large internal space for railway station. But the long- term vibrationinduced fatigue problem cannot be neglected for welded flexible large-span steel structure. In this paper, the finite elementmodel for a passenger- line railway station of large- span steel structure is established. The dynamic responses of thecomponents of the structure, such as V-support, lattice shell, the joint of lower chords, cast steel joint at the corner of columnand main arch, are analyzed. The maximum equivalent stress of each component is obtained. The computation results showthat the vibration load induced by high speed train has little influence on the strength of large-span steel structure. But thelong-term fatigue problem must be considered.
出处
《噪声与振动控制》
CSCD
2014年第6期144-147,共4页
Noise and Vibration Control
关键词
振动与波
高速列车
等效应力
大跨度钢结构
vibration and wave
high-speed train
equivalent stress
large-span steel structure
