Location

Arlington, Virginia

Session Start Date

8-11-2008

Session End Date

8-16-2008

Abstract

Blasting test studies have one drawback with regard to earthquake studies; they are concerned with vibrations of much smaller amplitude than those normally encountered in earthquakes. Consequently, blasting studies can be used to calibrate dam behavior in a linear elastic range. Accuracy of numerical models should be improved by full scale tests and in situ earthquake records. In this research, first of all a short review of different classical and modern signal processing methods is presented. As it is known, classical signal processing methods, such as FFT and PSD, have many limitations in non- stationary random vibration analysis. Blasting records are known to be one of the non – stationary signals in both intensity and frequency content. Blasting test records of Masjed Soleyman, the highest embankment dam in Iran, are processed in time – frequency domain by classical and TFD method. TFD method leads to better and more accurate system identification based on real available records in earth dam. Using this powerful and modern signal processing technique, frequency contents of blasting spectra are conducted and processing of the signal in both time and frequency domain can be performed. Also obtained results based on classical and TFD method are compared with each other and benefits of this method are discussed and described.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Sixth Conference

Publisher

Missouri University of Science and Technology

Publication Date

8-11-2008

Document Version

Final Version

Rights

© 2008 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Aug 11th, 12:00 AM Aug 16th, 12:00 AM

Using New Signal Processing Techniques in Analyzing Masjed Soleyman Embankment Dam's Explosion Records

Arlington, Virginia

Blasting test studies have one drawback with regard to earthquake studies; they are concerned with vibrations of much smaller amplitude than those normally encountered in earthquakes. Consequently, blasting studies can be used to calibrate dam behavior in a linear elastic range. Accuracy of numerical models should be improved by full scale tests and in situ earthquake records. In this research, first of all a short review of different classical and modern signal processing methods is presented. As it is known, classical signal processing methods, such as FFT and PSD, have many limitations in non- stationary random vibration analysis. Blasting records are known to be one of the non – stationary signals in both intensity and frequency content. Blasting test records of Masjed Soleyman, the highest embankment dam in Iran, are processed in time – frequency domain by classical and TFD method. TFD method leads to better and more accurate system identification based on real available records in earth dam. Using this powerful and modern signal processing technique, frequency contents of blasting spectra are conducted and processing of the signal in both time and frequency domain can be performed. Also obtained results based on classical and TFD method are compared with each other and benefits of this method are discussed and described.