Traffic-induced vibration is one of the main causes of small (often only cosmetic) damages for Heritage buildings. The heavy public road-transport, often very close to these structures, may lead to fatigue phenomena due to induced continuous vibrations and consequently damages. Even if all the International Standards agree to define the velocity—expressed in terms of Peak Particle Velocity (PPV) or Peak Particle Component Velocity (PCPV)—as reference damage indicator, a standard procedure for calculating those values starting from accelerometers data is indeed absent (or needs to be better specified). This paper—taking into account that in most cases velocities cannot be directly measured—first compares the efficiency of two of the most common employed methods: the trapezoidal rule and the long Discrete Fourier Transform. This comparison is performed discussing the experimental activity performed on the SS. Annunziata's lodge in Florence (Italy) which is particularly exposed to traffic-induced vibrations. Subsequently, a systematic analysis of the traffic-induced vibration phenomenon was performed based on (i) dynamic identification by means of accelerometers data; (ii) calculation of the velocities (PPV and PCPV); (iii) analysis of the traffic component effects; and (iv) analysis of the Structure-Soil Interaction (SSI) by using results obtained by means of Falling Weight Tests (FWT). Eventually, a comparison with the results of a previous dynamic test campaign performed in 1994 is reported, underlining a consistent increase of the traffic-induced vibrations on the lodge possibly caused by the increase of the road unevenness.

中文翻译：

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某古木屋交通振动试验分析

交通引起的振动是对遗产建筑造成小的（通常只是外观）损坏的主要原因之一。通常非常靠近这些结构的重型公共道路运输可能会由于诱发的持续振动而导致疲劳现象并因此造成损坏。即使所有国际标准都同意将速度定义为以峰值粒子速度 (PPV) 或峰值粒子分量速度 (PCPV) 表示的速度作为参考损伤指标，但从加速度计数据开始计算这些值的标准程序确实不存在（或需要更好地指定）。本文考虑到在大多数情况下无法直接测量速度，首先比较了两种最常用的方法的效率：梯形规则和长离散傅里叶变换。这种比较是在讨论在 SS 上进行的实验活动时进行的。Annunziata 在佛罗伦萨（意大利）的小屋特别容易受到交通引起的震动。随后，基于（i）通过加速度计数据进行动态识别，对交通引起的振动现象进行了系统分析；(ii) 速度计算（PPV 和 PCPV）；(iii) 交通成分影响分析；(iv) 使用通过落锤试验 (FWT) 获得的结果分析结构-土壤相互作用 (SSI)。最终，报告了与 1994 年进行的先前动态测试活动的结果进行比较，强调了可能由道路不平整度增加引起的交通引起的小屋振动持续增加。