地铁列车进出站相邻地下空间振动烦恼率评价

Annoyance Rate Evaluation of Ambient Vibration of Underground Space during Arrival-and-departure of Subway Train

地铁列车进出站引发相邻地下空间振动影响不容忽视，基于烦恼率模型可对该振动环境中人体舒适度做出定量评价。以紧邻地铁车站的某大型地下空间为例，基于Imote2无线传感器网络平台，对地铁列车进出站阶段该地下空间楼层Z向振动加速度进行了实测，获得了时、频响应，并对响应特性做出了分析。基于计权振动加速度谱，计算得到了不同区域条件下的最大烦恼率，据此对测区设计使用条件做出了评价。结果表明：列车减速进站时相邻地下空间振动响应较大；测试区域不宜设计为人体舒适度要求较高的I类区域，但可以设计为Ⅱ～Ⅳ类区域；弹性波在地下空间楼层内传播过程中，出现了振动放大区即烦恼率回弹区，实际使用中，应对该局部回弹区域加以规避，以降低其对人体舒适度及健康的不利影响。

The arrival and departure of subway trains induce ambient vibrations in the adjoining underground spaces, whose negative influence should not be ignored. Using the annoyance rate model, the human comfort under the ambient vibration can be quantitatively evaluated. In this paper, a large underground space adjoining subway station is taken for example, using the Imote2 wireless sensor network platform, to measure the Z-axis vibration acceleration of the floor slab of this underground space during the arrival-and-departure period. The time-history and frequency domain responses are acquired, and their characteristics are also analyzed. Based on the weighted acceleration spectrum, the maximal annoyance rate values, for different region conditions, are calculated. The design and use conditions of the testing zone are accordingly assessed. The re- sults show that the greater vibration responses occur in the adjoining underground space, when the subway train is deceleratingto arrive at the station. In addition, the testing zone should avert to be designed as the first class zone, which requires a higher human comfort, but it can be de- signed as second to the fourth class zones. The vibration amplifier region, namely the rebound region of annoyance rate occurs during the propagation of the elastic waves within the floor slab of the underground space. so as to lower its negative Therefore, in the practical use, influence on human comfort and the rebound region should be averted health.