武汉火车站大跨度楼面结构振动舒适度研究

Study on vibration comfort of long-span floor structure of Wuhan railway station under walk and jump excitation

武汉火车站楼面结构具有平面尺寸大、跨度大、支撑构件复杂、楼面形状不规则、荷载大、梁高受限制等特点。这些特点导致楼面结构竖向自振频率较低,在人的行走和跳跃激励下有可能产生较大的动力响应,从而引起楼面人员的不舒适。对历史上楼面振动舒适度的评价标准进行了归纳总结,并提出适合楼面结构的舒适度评价标准;对武汉火车站大跨度楼面结构在行走和跳跃激励下引起结构的振动加速度进行了计算,并进行了相应的舒适度评价,结果表明,在人的行走和跳跃下不会引起楼面人员的不舒适。

The floor structure of Wuhan railway station has the characteristics of big area, long span, complex support component, irregular shape of floor, heavy loads and restriction of beam height, which made the vertical frequency of floor lower and dynamic response heavier under walking and jumping which made people on floor uncomfortable. This paper has studied the domestic and foreign floor vibration comfort criterion, and then the evaluation index of vibration comfort of long-span floor systems has been proposed. The peak acceleration of long-span floor structure of Wuhan railway station under walking and jumping where is low frequency is calculated and the floor comfort has been evaluated. It is proved that the floor of Wuhan railway station under walking and jumping does not make people uncomfortable.