多振源激励下武汉站振动实测与舒适度研究

Vibration Measurement and Comfort Study of Wuhan Railway Station Under Multi⁃vibration Sources

为了研究综合交通枢纽中地铁、高铁和行人等振源单独作用和共同作用下楼板的振动响应问题,以武汉站为例,对其站厅层开展现场振动实验测试,并结合标准JGJ/T 170—2009对站厅层进行了振动舒适度评价。时域分析结果表明:列车产生的振动传递到站厅层,会在各个结构柱处产生一定的放大;振源数目对水平方向加速度的影响大于对竖向加速度的影响;站厅层一跨内的振动传递特性可近似用二次函数递减推算。频域分析结果表明:站厅层的振动频率均集中在0~100 Hz;随着测点距离的变化,高频成分发生明显衰减,但10~20 Hz处的低频成分并没有随着距离的增加而出现明显的衰减。振动舒适度评价表明:武汉站站厅层的振动舒适度符合规范要求,但长期处在振动的环境中,会对工作人员的身心产生一些影响。该研究对新建综合交通枢纽的设计和在役交通枢纽的正常运行维护具有一定的指导意义。

To investigate the floor slab′s vibration response to individual and combined actions of vibration sources,such as those from subway,high-speed trains,and pedestrians within the terminal,Taking Wuhan Railway Station as an example,on-site vibration measurements of the station hall floor are conducted;Combined with the standard JGJ/T 170—2009,the vibration comfort of the station hall floor is evaluated.The conclusions are as follows:(1)Time domain analysis:the vibration generated by the train is amplified at each structural column when it is transmitted to the station hall floor;The influence of the number of vibration sources on the horizontal acceleration is greater than that on the vertical acceleration;The vibration transmission characteristics in one span of the station hall floor can be approximately calculated by the decline of quadratic function.(2)Frequency domain analysis:the vibration frequencies of the station hall floor are concentrated in 0~100 Hz;With the change of the distance between the measuring points,the high-frequency components attenuate obviously,but the low-frequency components at 10~20 Hz do not attenuate obviously with the increase of the distance.(3)Vibration comfort evaluation:the vibration comfort of the hall floor of Wuhan station meets the specification requirements,but for the personnel working in Wuhan station,long-term exposure to the vibration environment will still have some impact on their body and mind.The study has certain guiding significance for the design of new comprehensive transportation hubs and the normal operation and maintenance of existing transportation terminal.