Análisis espectral de alta resolución para la estimación de la frecuencia fundamental de edificios altos sometidos a terremotos (High-resolution Spectral-analysis for Fundamental Frequency Estimation of High-rise Buildings subjected to Earthquakes)

Carlos Andres Perez Ramirez (, Juan Pablo Amezquita Sanchez (, Martin Valtierra Rodiguez (, David Camarena Martinez (, Aurelio Dominguez Gonzalez (, Jesus Ronney Rivera Guillen (, Omar Chavez Alegria (

1Universidad Autonoma de Queretearo
2Universidad de Guanajuato
3Universidad Autonoma de Queretaro

This paper appears in: Revista IEEE América Latina

Publication Date: Dec. 2015
Volume: 13,   Issue: 12 
ISSN: 1548-0992

Accurate estimation of the fundamental frequency of civil structures is crucial for many applications; in particular, this estimation becomes more important when it helps to avoid or minimize human, economic, and structural damages as the case of the design and analysis of high-rise buildings subjected to earthquakes. Although many techniques have been proposed for this task, several aspects such as accuracy, noise immunity, and suitable time-frequency resolution have not been adequately addressed. In this work, the short-time multiple signal classification (ST-MUSIC), a high-resolution spectral-analysis technique, is proposed to estimate the fundamental frequency of high-rise buildings using vibration signals. The proposal is validated and tested using synthetic signals and real measurements. In the latter, the fundamental frequency of a high-rise building, 1:20 scale model, is estimated before-, during-, and after-seismic excitation through the analysis of the generated vibrations. For comparison purposes, the short-time Fourier transform (STFT), a conventional time-frequency technique, is also used. The obtained results show a high accuracy and noise immunity in the analysis, which makes the proposal a suitable and reliable tool for this task.

Index Terms:
High-rise biuldings, multiple signal classification, time-frequency analysis, vibration analysis, fundamental frequency   

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