Empirical site response evaluations: case studies in Israel

Gitterman, Yefim; Zaslavsky, Y.; Shapira, Avi; Shtivelman, V.

doi:10.1016/0267-7261(96)00019-x

Cited by 47 publications

(18 citation statements)

References 13 publications

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“…These sites are located in buildings close to the main streets of the center of Thessaloniki, where peak traffic occurs between 06:00 a.m.-14:00 a.m. GMT (TSILINGIRIDIS et al 2002). This is a strong indication that the noise H/V spectral ratio is influenced by man-made activities during working hours, as has been noted in a number of relevant studies (e.g., FYEN, 1990;GITTERMAN et al 1996;MILANA et al 1996). In addition, BAHAVAR and NORTH (2002) also observed that high-frequency levels are higher during local daytime than at night-time.…”

Section: Diurnal Variation Of the H/v Spectral Ratio Of Ambient Noisementioning

confidence: 60%

Reliability of Ambient Noise Horizontal-to-Vertical Spectral Ratio in Urban Environments: The Case of Thessaloniki City (Northern Greece)

Panou

Theodulidis

Hatzidimitriou

et al. 2005

Pure appl. geophys.

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In the framework of an ambient noise measurement project in the downtown district of the City of Thessaloniki (Northern Greece), several tests and evaluation of noise recordings were performed in selected sites. This data set was processed and compared with previous results for the same sites in terms of horizontal-to-vertical (H/V) spectral ratio obtained from weak and strong motion earthquake data. The recording system used was tested against a reference one. Finally, systematic ambient noise measurements were performed at eight sites in the city's downtown area, to evaluate diurnal and seasonal variations. It was concluded that the recording system used was reliable and the ambient noise H/V spectral ratios were in good agreement with relevant results previously obtained. Diurnal variation of the ambient noise H/V spectral ratio showed that it is preferable to perform measurements during the calm hours of the day, when man-made noise is relatively low. However, no systematic seasonal fluctuation effect on the ambient noise H/V spectral ratio was identified.

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Section: Diurnal Variation Of the H/v Spectral Ratio Of Ambient Noisementioning

confidence: 60%

Reliability of Ambient Noise Horizontal-to-Vertical Spectral Ratio in Urban Environments: The Case of Thessaloniki City (Northern Greece)

Panou

Theodulidis

Hatzidimitriou

et al. 2005

Pure appl. geophys.

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“…Nakamura (1989Nakamura ( , 2000 hypothesized that site response could be estimated from the spectral ratio of horizontal vs. vertical component of noise observed at the same site. Many studies show that the H/V ratio obtained from ambient vibrations coincides with response functions of near surface structures to incident shear wave (Ohmachi et al, 1991;Lermo and Chavez-Garcia, 1994;Zaslavsky et al, 1995;Gitterman et al, 1996;Seekins et al, 1996;Chavez-Garcia and Cuenca, 1998;Konno and Ohmachi 1998;Mucciarelli and Monachesi, 1998;Toshinava et al, 1997;Shapira et al, 2001). Recently, Bonilla et al (1997), Horike et al (2001) and contended that estimates of the frequency of the predominant peak are similar to those obtained from traditional sediment-to-bedrock spectral ratio of earthquake records (Borcherdt, 1970).…”

Section: Introductionmentioning

confidence: 90%

Site Response from Ambient Vibrations in the Towns of Lod and Ramle (Israel) and Earthquake Hazard Assessment

Zaslavsky

Shapira

Gorstein

et al. 2005

Bull Earthquake Eng

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Throughout their long history, the towns of Lod and Ramle have been severely affected by strong earthquakes. The last destructive earthquake occurred on July 11, 1927 and caused the destruction of large parts of these cities, reaching a seismic intensity of VIII-IX on the MSK scale. Such a high intensity from a relatively distant earthquake (about 70 km) of magnitude 6.2 is likely to be the result of local site effects of the sedimentary layers that may have significantly enhanced earthquake ground motions.This study is focused on estimating the seismic hazard to Lod and Ramle by implementing a three-step process: (1) detailed mapping of the characteristics of the H/V spectral ratios from ambient noise, (2) incorporating geological information and well data to construct subsurface models for different sites within the investigated area and (3) estimating the seismic hazard in terms of uniform hazard site-specific accelerations.The horizontal-to-vertical spectral ratios of ambient noise were used to approximate the fundamental resonance frequencies of the subsurface and their associated amplitudes. About 360 sites in Lod and Ramle were instrumented for varying periods. The soil sites exhibits H/V peak amplitudes ranging from 4 to 6 in the frequency range 0.5-2.5 Hz. These data were used to constrain 1-D subsurface models that were developed using geological data and borehole information. H/V spectral ratio observations were checked against theoretical subsurface transfer functions at locations where borehole information is available farther constraint the range of possible V s velocities of the different layers and thus, by means of trial an error it was possible to conclude a systematic spatial distribution of the V s velocity and thickness in the substrata that are also consistent with the spatial distribution of the fundamental resonance frequencies of the soft sediments obtained by means of the H/V spectral ratios, and other geological and geophysical information available at different locations in the study area.The evaluated subsurface models are introduced using the SEEH procedure of Shapira and van Eck [(1993) Natural Hazards 8, 201-205] to assess Uniform Hazard Site-Specific Acceleration Spectra for different zones within the towns of Lod and Ramle. These evaluations are very important for realistic assessment of the vulnerabilities of all types of existing and newly designed structures and for urban and land use planning. 356Y. ZASLAVSKY ET AL.

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“…HVSR measurements obtained from the records of HVSR peak amplitude values (a) and HVSR peak period values (b). experimentally and theoretically at many sites by different researchers Chavez-Garcia 1993, 1994;Lachet and Bard 1994;Field and Jacob 1995;Gitterman et al 1996;Theodulidis et al 1996;Mucciarelli 1998;Konno and Ohmachi 1998;Zaslavsky et al 2000;Fah et al 2001 generally provide a very good estimation of the fundamental frequency (peak frequency or period of HVSR) of the sites in terms of their soil properties. HVSR measurements were recorded using a CMG-6TD model seismograph equipped with three components, which was designed by Güralp Systems.…”

Section: Microtremor Measurements and Data Analysismentioning

confidence: 96%

“…Seismic waves cause a variety of ground and structures. HVSR technique has been used by many other researchers Chavez-Garcia 1993, 1994;Lachet and Bard 1994;Field and Jacob 1995;Gitterman et al 1996;Theodulidis et al 1996;Bard 1998;Konno and Ohmachi 1998;Mucciarelli 1998;Zaslavsky et al 2000;Fah et al 2001;Dikmen and Mirzaoglu 2005;Asten 2006;Bonnefoy-Claudet et al 2006;Hasancebi and Ulusay 2006;Eskişar et al 2013;Asten et al 2014;Akkaya 2015). Although several researchers claimed that the theoretical background of this technique is not clear, there have been many successful experimental studies performed (Nakamura 2008).…”

Section: Introductionmentioning

confidence: 95%

Determining the site effects of 23 October 2011 earthquake (Van province, Turkey) on the rural areas using HVSR microtremor method

et al. 2015

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A magnitude of 7.1 Mw earthquake struck Van city on October 23, 2011. Although, construction practices of all rural housing units are similar in the region, the earthquake caused massive damage to villages located on soft soils in northern region of the city. In this study, the effects of soil conditions on damaged housing units were determined by conducting horizontal to vertical spectral ratios of microtremor (HVSR) measurements. The level of damage in the villages that are settled on lacustrine and stream sediments has verified that the damage correlates well with comparatively high HVSR peak period and HVSR peak amplitude values in the range of 0.2-1.6 s and 4-10, respectively. The HVSR peak period and HVSR peak amplitude levels on rock units are in the range of 0.1-0.2 s and 1.5-2, respectively. It is important to note that hillside effect is found to be another key factor that increased the level of damage to the housing units in some villages.

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Empirical site response evaluations: case studies in Israel

Cited by 47 publications

References 13 publications

Reliability of Ambient Noise Horizontal-to-Vertical Spectral Ratio in Urban Environments: The Case of Thessaloniki City (Northern Greece)

Reliability of Ambient Noise Horizontal-to-Vertical Spectral Ratio in Urban Environments: The Case of Thessaloniki City (Northern Greece)

Site Response from Ambient Vibrations in the Towns of Lod and Ramle (Israel) and Earthquake Hazard Assessment

Determining the site effects of 23 October 2011 earthquake (Van province, Turkey) on the rural areas using HVSR microtremor method

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