Naslov
HVSR of ambient noise in Ston (Croatia) – comparison with theoretical spectra and with the damage distribution after the 1996 Ston-Slano earthquake

Autori
Herak, Marijan ; Allegretti, Ivo ; Herak, Davorka ; Kuk, Krešimir ; Vlado Kuk ; Marić, Krešimir ; Markušić, Snježana ; Stipčević, Josip

Izvornik
Bulletin of Earthquake Engineering (1570-761X) 8 (2010), 3; 483-499

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
ambient noise; soil structure; amplification; microzonation; HVSR

Sažetak
Horizontal-to-vertical spectral ratios (HVSR) of ambient vibrations measured in the ancient town of Ston (Croatia) on 99 locations, are shown to be well matched to the theoretical ones computed for body-waves as well as for the surface waves. This match is poorer for sites on the slopes of nearby hills. The ratios of measured peak horizontal ground acceleration during the damaging earthquake in 1996 (ML = 6.0) and the ones obtained using empirical attenuation laws is approximately equal to the mapped value of the dynamic amplification factor (DAF) determined on the basis of observed HVSR in the vicinity of the accelerometric station. The HVSR of the accelerogram is very similar to the HVSR of the ambient noise. The damage to the building stock in the old town centre caused by the earthquake series of 1996 is closely related to the estimated soil amplification and its fundamental frequency. More measurements in buildings are needed to arrive at confident conclusions about possible soil-structure resonance.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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