000011282 001__ 11282
000011282 005__ 20141205155855.0
000011282 04107 $$aeng
000011282 046__ $$k2008-10-12
000011282 100__ $$aPando, Miguel A.
000011282 24500 $$aComparison of Site Fundamental Period Estimates Using Weak-Motion Earthquakes and Microtremors

000011282 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011282 260__ $$b
000011282 506__ $$arestricted
000011282 520__ $$2eng$$aThis paper presents a comparison of the site period estimated with different techniques which use weak motion measurements recorded at seismic stations in Mayagüez, Puerto Rico. The stations are located in sites with soil profiles ranging from NEHRP classes B to E. The literature reports different degrees of success when estimating site periods based on low-intensity earthquakes and microtremor measurements. Some of the issues reported are related to effects due to differences in the seismic source, travel path, etc. This paper compares the dominant site periods computed using three well known methods, namely the Fourier amplitude spectra, the Fourier spectral ratios between the spectra at the site and at a reference station, and the spectral ratios between the horizontal and the vertical components of ambient vibrations (i.e., the Nakamura's technique). The paper also presents site period estimates based on two new techniques. The first approach proposed by Montejo and Suarez (2006) consists in the application of the wavelet transform to strong motion accelerograms. This paper applies for the first time this new technique to weak-motion earthquakes. The other new approach, proposed by Cano (2008), is based on random vibration theory applied to ambient vibrations. The paper evaluates the applicability of the different techniques for various site conditions and weak motion earthquakes with different amplitude and frequency content and ambient vibration signals recorded at strong motion stations located in Mayagüez, Puerto Rico. The results show that weak-motion measurements can be used to estimate the dominant period of sites with acceptable reliability.

000011282 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011282 653__ $$aH/V spectral ratios, microtremors, Nakamura technique, site periods, weak motions

000011282 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011282 720__ $$aPando, Miguel A.$$iCano, Leonardo$$iSuárez, Luis E.$$iRitta, Raul$$iMontejo, Luis A.
000011282 8560_ $$ffischerc@itam.cas.cz
000011282 8564_ $$s704398$$uhttps://invenio.itam.cas.cz/record/11282/files/02-0142.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 02-0142.
000011282 962__ $$r9324
000011282 980__ $$aPAPER