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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 vibration impact of the adjacent underground space caused by the subway train inbound and outbound station can not be neglected. Based on the annoyance rate model, the human comfort in the vibration environment can be quantitatively evaluated. Taking a large underground space next to the metro station as an example, based on the Imote2 wireless sensor network platform, the vibration acceleration in the Z direction of the underground space during the subway station in-out stage was measured, the time-frequency response was obtained, and the response characteristic Analysis. Based on the weighted vibration acceleration spectrum, the maximum annoyance rate under different area conditions was calculated, and the conditions for the design of the test area were evaluated. The results show that the vibration response of the adjacent underground space is larger when the train decelerates and stops; the test area should not be designed as Class Ⅰ area with higher human comfort requirements, but can be designed as Ⅱ ~ Ⅳ area; In the process of propagation, the vibration amplification zone, ie, the bounce area of annoyance rate, appears. In actual use, the local rebound area should be circumvented to reduce its adverse effect on human comfort and health.