Experimental analysis of the traffic-induced-vibration on an ancient lodge
Experimental analysis of the traffic-induced-vibration on an ancient lodge
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DOI：
10.1002/stc.2900
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发表时间：
2021-12-02
影响因子：
5.4
通讯作者：
Bartoli, Gianni
中科院分区：
文献类型：
--
作者：
Zini, Giacomo;Betti, Michele;Bartoli, Gianni
地震引起的振动是文物建筑小（通常只是外观）损坏的主要原因之一。重型公共道路运输，往往非常接近这些结构，可能会导致疲劳现象，由于诱导的连续振动，从而损害。即使所有国际标准都同意将速度（用峰值粒子速度（PPV）或峰值粒子分量速度（PCPV）表示）定义为参考损坏指标，从加速度计数据开始计算这些值的标准程序确实是不存在的（或需要更好地指定）。本文考虑到在大多数情况下速度无法直接测量，首先比较了两种最常用方法的效率：梯形规则和长离散傅里叶变换。进行该比较，讨论在SS上进行的实验活动。Annunziata的小屋在佛罗伦萨（意大利），这是特别暴露于交通引起的振动。随后，基于（i）通过加速度计数据进行动态识别;（ii）计算速度（PPV和PCPV）;（iii）分析交通组件效应;以及（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），对交通引起的振动现象进行了系统分析。最后，在1994年进行的动态测试活动的结果进行比较的报告，强调了一致的增加的交通引起的振动上的小屋可能造成的道路不平坦的增加。
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.