TA682 : Presentation of attenuation relationships for the maximum horizontal and vertical earthquake acceleration (PGA) in earthquakes near fault zones
Thesis > Central Library of Shahrood University > Civil & Architectural Engineering > MSc > 2022
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Abstract
The occurrence of an earthquake has left an impact on different societies throughout human life. The scientific community has always wanted to play its role in reducing the adverse effects of earthquakes and creating appropriate mechanisms. Seismic hazard analysis has provided this possibility by estimating the parameters of strong ground motion. This process is possible by using appropriate and specific attenuation relationships for each region. In the field of attenuation relations for earthquakes near the fault, and especially the vertical component of the maximum acceleration of the earthquake, less has been discussed.The present study presents the attenuation relations of the maximum acceleration reduction of the horizontal and vertical component of the earthquake in earthquakes near the fault with five types of faults, including: normal fault, reverse fault, strike-slip fault, reverse oblique fault and normal oblique fault And then for each of the horizontal component and the vertical component in the area near the fault, a general attenuation relations is introduced, which includes a total of 10 different attenuation relations. To achieve this, a catalog of 1342 index records collected from all over the world has been used. Magnitude parameters (Mw), closest distance to fault rupture plane (Rrup) and shear wave speed (Vs) have been taken into account as variables to obtain the attenuation relationship. The values of fitness, correlation for each of the mentioned attenuation relationship and comparison with other researches show the high accuracy of the results of this research.
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#Keywords: Attenuation Relationship #Gene exxpression Programming (GEP) #Peak Ground Acceleration (PGA) #Near field area #ground-motion prediction equations (GMPEs) #Fault mechanism Keeping place: Central Library of Shahrood University
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