Characterization of strong-motion accelerogram for earthquake damage assessment

Sandeep, G S and Prasad, S K (2015) Characterization of strong-motion accelerogram for earthquake damage assessment. In: World Conference on Applied Sciences, Engineering & Technology, 24-26 October 2015,, Kumamoto University, Japan.

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Abstract

Earthquakes are the most damaging and catastrophic natural calamities of all times. Post-earthquake damage assessment has been one of the preliminary steps for the establishment of a proper reconstruction strategy. Also such damage assessments can be used in controlling loss from future earthquakes, developing an efficient warning system. Observations of structural and non-structural damages after severe earthquakes exhibit interdependency between the seismic parameters and the structural response. Earthquake seismograms possess inherent information that can be extracted in the form of seismic parameters by a computer supported analysis. It is widely recognized that characterization of the nature of strong ground-motion from a single parameter and hence to use in correlating the damage is very difficult. Various ground-motion parameters like peak ground acceleration, peak ground velocity, peak ground displacement, Arias intensity, Houser intensity, Energy densities, energy flux etc. can be utilized in the analysis of seismogram to assess the damaging aspects. In the present work, strong-motion accelerograms of four different earthquakes at different stations at ground level have been analyzed and attempt has been made to correlate accelerogram characteristics like PGA, PGV, PGD, AI, SED and HI with corresponding earthquake damage level (Mercalli Intensity scale). For this purpose, all three (East – West, North – South and Up – down) components of strong motion accelerograms from different sites at ground level have been considered. It has been inferred that MM Intensity and hence the severity of damage is directly proportional to ground-motion parameters and use of more number of parameters instead of only Amax or Vmax, can add more precision to the assessment. Such post-earthquake assessments can be utilized in predicting intensities of future earthquakes and so in minimizing damage and losses in future during earthquakes

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Accelerogram, Peak ground acceleration (PGA), Peak ground velocity(PGV), Peak ground displacement(PGD), Arias intensity(AI), Specific energy density(SED), Housner intensity(HI), Damage assessment
Subjects: Engineering > MIT Manipal > Civil Engineering
Depositing User: MIT Library
Date Deposited: 06 Jul 2017 08:52
Last Modified: 06 Jul 2017 08:52
URI: http://eprints.manipal.edu/id/eprint/149267

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