Aplicación de la técnica H/V en distintos emplazamientos a partir de la medición de vibraciones ambientales y de sismos

Revista Geologica de America Central

Schmidt-Díaz, Víctor¹ 

[1] Universidad de Costa Rica, San Pedro de Montes de Oca, CR

关键词: Spectral ratio;    ambiet vibration;    earthquakes;    fundaental period;    soils.;   

DOI  :  10.15517/rgac.v54i0.23282

学科分类：地质学

来源: Universidad de Costa Rica * Editorial

【 摘 要 】

Four techniques to identify the fundamental frequency (f0) for 26 different sites were applied. These techniques correspond to spectral ratios based on the recording of: ambient vibration using an accelerograph (denominated VAA), ambient vibration using a seismograph (VAS), total seismic records (ST) and a time window of 5 s staring at S waves arrives in the seismic records (SOS). Better results were achieved when VAA was applied during the day (at 8 am and 3 pm). When VAA at 3 pm was compared to VAS at day time, it was observed that in the 58% of the analyzed cases the shapes and amplitudes of the spectral ratios were different, which means that VAA is not an appropriated technique to identify f0 based on that the results from VAS are the correct ones. It is affirmed based on its similarity to ST and SOS techniques in a 75% of the studied cases. These last two techniques are better justified in both mathematical and physical fundaments.

【 授权许可】

Unknown