Correlation between earthquake damage and seismic site effects: The study case of Lentini and Carlentini, Italy

Panzera, Francesco; Lombardo, Giuseppe; Imposa, Sebastiano; Grassi, Sabrina; Gresta, S.; Catalano, Stefano; Romagnoli, Gino; Tortorici, Giuseppe; Patti, Francesco; Maio, E. Di

doi:10.1016/j.enggeo.2018.04.014

Cited by 39 publications

(15 citation statements)

References 32 publications

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“…North of the fault, the P GVHmod-DF were much smaller than on the south side. Such occurrences of damage to buildings indicate the probable impact of the fault and the seismic site effects on the size and number of cases of damage to buildings [36][37][38]. Table 4 and Figure 9 also show most instances of damage in buildings located at a distance of up to around 1200 m from the Barbara fault.…”

Section: Resultsmentioning

confidence: 94%

The Impact of High-Energy Mining-Induced Tremor in a Fault Zone on Damage to Buildings

et al. 2021

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Seismic energy propagation from the hypocentre of mining-induced tremors usually causes an uneven distribution of the peak ground velocity PGVHmax in tectonically complicated structures, and consequently, an uneven distribution of damage to buildings located on the ground surface. This study aimed to estimate the impact of high-energy mining-induced tremors in fault zones on damage to buildings. In the study, we describe a case of one of the highest-energy mining-induced tremors E = 4.0 · 108 J (local magnitude ML = 3.6) that occurred in the Upper Silesian Coal Basin (USCB), Poland. The hypocentre of the tremor was most probably located in the Barbara fault zone, one of the larger faults in that western part of the USCB. Numerous damaged buildings on the terrain surface were registered, both in the epicentral zone and at a greater distance from the epicentre, mostly from the southern side of the Barbara fault zone. We calculated that the tremor was characterised by a normal slip mechanism associated with the same kind of fault as the Barbara fault. The azimuth of the nodal planes was similar to the west-east direction, which is consistent with the azimuth of the Barbara fault. From the focal mechanism, the greatest propagation of seismic energy occurred in south and west-east directions from the tremor hypocentre towards the surface. It was found that from the northern side of the hanging wall of the Barbara fault, there were 14 instances of damage (19%), and in the southern part of a hanging wall, there were 58 (81%). Therefore, the directionality of seismic energy propagation is aligned with the focal mechanism acting in the Barbara fault. It has also been concluded that a width of the zone of up to about 1200 m along the Barbara fault is the most threatening on the basis of registered building damage in the geological conditions of USCB. The study has shown that in assessing the impact of mining-induced tremors on buildings and the environment, the disturbance of seismic energy propagation by larger faults should be considered.

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Section: Resultsmentioning

confidence: 94%

The Impact of High-Energy Mining-Induced Tremor in a Fault Zone on Damage to Buildings

et al. 2021

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“…Many experiments and theoretical 1D investigations have demonstrated that a strong impedance contrast between the upper layers and the underlying ones (stiffer layers) provides a clear HVSR peak around the fundamental resonance frequency [33][34][35][36][37][38][39]. The HVSR method has become accepted in microzonation studies, since its application and interpretation is straightforward and suitable [40][41][42][43].…”

Section: Horizontal To Vertical Spectral Ratios (Hvsr) Methodsmentioning

confidence: 99%

Ambient Noise Measurements to Constrain the Geological Structure of the Güevéjar Landslide (S Spain)

et al. 2021

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The reactivation of very large landslides may cause severe damage to society. Its prevention and management requires detailed information on the geometry and structure of these landslides, but the use of standard techniques (boreholes) may be prohibitive from an economic point of view. To overcome these difficulties, geophysical techniques are of special interest because they allow for studying very large areas at a reasonable cost. In this paper, we present a case study wherein the analysis of ambient noise allowed us to produce a model of a large landslide near Granada (southern Spain). The geometry and location of the failure zone, as well as the assessment of the state of involved materials, were estimated by combining two available boreholes and different geophysical techniques (downhole tests and the spectral analysis of ambient noise, horizontal to vertical spectral ratios (HVSR) and the frequency-wavenumber (f-k) methods). The results have allowed us to differentiate between values within the landslide mass with respect to those of stable materials, and to perform for the first time a comprehensive geological model of this unstable mass. Differences were also observed within the landslide mass (earth flow vs. slide zones), which are attributed to differences in the degree of alteration and the disturbance of the internal structure of materials constituting the landslide mass. These results show that techniques based on the measurement of ambient noise are of special interest for studying very large, highly remolded landslide masses.

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“…For each zone, we must identify the fundamental sites frequency and recognize the spectral site's response (their transfer function). Therefore, the soils recognition and their response allow the identification of typical behaviors and the adaptation of the structures design spectra, which are imposed by the seismic regulations, in order to take into account the site effects [37][38]. In fact, regulations can only give a lump and simplified values that rarely reflect the soils physical reality.…”

Section: Microzonation Methodologymentioning

confidence: 99%

Nonlinear Deterministic Study of Seismic Microzoning of a City in North of Algeria

Bousbia

Sbartai

2019

Civ Eng J

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This paper presents also an overview of seismic microzonation studies of the city of Mohammadia-Algiers, which are important for a detailed ground movement modeling of urban cities. According to the seismic history of the city, one extraordinary earthquake event has been taken into consideration is Boumerdes earthquake (Algeria, May 21, 2003, magnitude Mw=6.5), that caused a huge damage. Thereby, the variability prediction of the seismic ground movement in a given built-up area, it is considered as an effective tool for planning appropriate urban development and understanding both seismic risk and damage pattern, caused by a strong movement event. We note that the shaking level is mainly described in terms of both maximum ground acceleration and visualized amplification by using response spectra. The study is carried out in two steps: - a detailed mapping of the geology and geotechnical properties of the area - numerical modeling of expected ground motions during earthquakes. A qualitative microzonation of the Mohammadia-Algiers city is presented, and it is discussed by comparing it to the historically reported damage of the 2003 Boumerdes earthquake. Finally, this study deals with the seismic microzonation map development, based on a SIG geological model.

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Correlation between earthquake damage and seismic site effects: The study case of Lentini and Carlentini, Italy

Cited by 39 publications

References 32 publications

The Impact of High-Energy Mining-Induced Tremor in a Fault Zone on Damage to Buildings

The Impact of High-Energy Mining-Induced Tremor in a Fault Zone on Damage to Buildings

Ambient Noise Measurements to Constrain the Geological Structure of the Güevéjar Landslide (S Spain)

Nonlinear Deterministic Study of Seismic Microzoning of a City in North of Algeria

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