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Evaluation of soil-building resonance effect in the urban area of the city of Matera (Italy)
Engineering Geology ( IF 7.4 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.enggeo.2020.105645
M.R. Gallipoli , G. Calamita , N. Tragni , D. Pisapia , M. Lupo , M. Mucciarelli , T.A. Stabile , A. Perrone , L. Amato , F. Izzi , G. La Scaleia , D. Maio , V. Salvia

Abstract This study discusses the effect of buildings vibrations in the urban field in the context of local seismic response studies in order to evaluate the possible occurrence of double resonance effects during strong-motions. The aim is to recognise the interaction effect between near surface geology and all overlying buildings in the urban area of the city of Matera (southern Italy). Single station seismic ambient noise measurements (230) were performed on the main lythologies (134) and on the principal building typologies (96). Soil and building measurements allowed estimating the main frequencies and relative amplitudes of the soil fundamental peaks as well as the first vibrational frequency of buildings. The period-height linear relationship, derived by experimental results, made it possible estimating the fundamental frequency for all the Matera's buildings. Having also estimated the frequencies at each point of the urban soil it was thus possible to obtain a soil-building resonance map in the linear elastic domain. Matera represents an important case study because the first vibration frequency for most of the buildings is quite close to those of the foundation soils. About 21% of buildings show high probability of occurrence of soil-building resonance effect, about 63% of the buildings are characterised by a medium resonance level, while about 16% are at zero or very low level. The proposed approach makes it also possible to identify the areas of the city characterised by these different probabilities of resonance levels.

中文翻译:

意大利马泰拉市城区土建共振效应评价

摘要 本研究在局部地震反应研究的背景下讨论了城市领域中建筑物振动的影响,以评估强震期间可能发生的双共振效应。目的是识别近地表地质与马泰拉市(意大利南部)市区所有上覆建筑物之间的相互作用。对主要岩性 (134) 和主要建筑类型 (96) 进行了单站地震环境噪声测量 (230)。土壤和建筑物测量允许估计土壤基本峰值的主要频率和相对振幅以及建筑物的第一振动频率。由实验结果得出的周期-高度线性关系,使估算所有马泰拉建筑的基频成为可能。还估计了城市土壤每个点的频率,因此可以在线弹性域中获得土壤建筑共振图。Matera 代表了一个重要的案例研究,因为大多数建筑物的第一振动频率非常接近地基土壤的振动频率。大约21%的建筑物表现出高概率发生土体共振效应,大约63%的建筑物具有中等共振水平,而大约16%的建筑物处于零或极低水平。提议的方法还可以识别以这些不同的共振水平概率为特征的城市区域。还估计了城市土壤每个点的频率,因此可以在线弹性域中获得土壤建筑共振图。Matera 代表了一个重要的案例研究,因为大多数建筑物的第一振动频率非常接近地基土壤的振动频率。约21%的建筑物出现土-建筑共振效应的概率较高,约63%的建筑物为中等共振水平,约16%为零或极低水平。提议的方法还可以识别以这些不同的共振水平概率为特征的城市区域。还估计了城市土壤每个点的频率,因此可以在线弹性域中获得土壤建筑共振图。Matera 代表了一个重要的案例研究,因为大多数建筑物的第一振动频率非常接近地基土壤的振动频率。大约21%的建筑物表现出高概率发生土体共振效应,大约63%的建筑物具有中等共振水平,而大约16%的建筑物处于零或极低水平。提议的方法还可以识别以这些不同的共振水平概率为特征的城市区域。Matera 代表了一个重要的案例研究,因为大多数建筑物的第一振动频率非常接近地基土壤的振动频率。约21%的建筑物出现土-建筑共振效应的概率较高,约63%的建筑物为中等共振水平,约16%为零或极低水平。提议的方法还可以识别以这些不同的共振水平概率为特征的城市区域。Matera 代表了一个重要的案例研究,因为大多数建筑物的第一振动频率非常接近地基土壤的振动频率。大约21%的建筑物表现出高概率发生土体共振效应,大约63%的建筑物具有中等共振水平,而大约16%的建筑物处于零或极低水平。提议的方法还可以识别以这些不同的共振水平概率为特征的城市区域。
更新日期:2020-07-01
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