大跨度钢结构楼盖的消能减振设计

Vibration Energy Dissipation Design of the Large-span Floor Structure

文章介绍了某火车站高架候车大厅大跨度钢结构楼盖的消能减震设计。在楼盖指定钢梁的跨中安置TMD-粘滞流体阻尼器消能减振装置,消能减振装置包括TMD和粘滞阻尼器两部分,每个TMD由一个质量块和4个弹簧减振器组成,粘滞阻尼器选用无刚度的速度线性相关型阻尼器。分析计算表明,安装减振装置后,有效地削减了该楼盖的共振响应,所有工况平均减振为49%,在共振工况下减振率达80%以上,减振效果良好。

This paper presented vibration energy dissipation design of the large-span floor structure.TMD system and fluid viscous dampers were installed in the middle span of steel beam located.A TMD system includes a mass of metal and 4 spring dampers.The fluid viscous damper is a kind of velocity related damper without rigidity.The dynamical analysis and computation results prove that the vibration energy dissipation can effectively reduce the resonance response of the large-span floor structure.All cases of the mean ratio of vibration energy dissipation come up to 49%,and the resonance cases of the ratio of it exceed 80 %.