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http://dx.doi.org/10.12989/gae.2022.30.1.001

Applied 2D equivalent linear program to analyze seismic ground motion: Real case study and parametric investigations  

Soltani, Navid (Department of Civil Engineering, Faculty of Engineering, Ardakan University)
Bagheripour, Mohammad Hossein (Department of Civil Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman)
Publication Information
Geomechanics and Engineering / v.30, no.1, 2022 , pp. 1-10 More about this Journal
Abstract
Seismic ground response evaluation is one of the main issues in geotechnical earthquake engineering. These analyses are subsequently divided into one-, two- and three-dimensional methods, and each of which can perform in time or frequency domain. In this study, a novel approach is proposed to assess the seismic site response using two-dimensional transfer functions in frequency domain analysis. Using the proposed formulation, a program is written in MATLAB environment and then promoted utilizing the equivalent linear approach. The accuracy of the written program is evaluated by comparing the obtained results with those of actual recorded data in the Gilroy region during Loma Prieta (1989) and Coyote Lake (1979) earthquakes. In order to precise comparison, acceleration time histories, Fourier amplitude spectra and acceleration response spectra diagrams of calculated and recorded data are presented. The proposed 2D transfer function diagrams are also obtained using mentioned earthquakes which show the amount of amplification or attenuation of the input motion at different frequencies while passing through the soil layer. The results of the proposed method confirm its accuracy and efficiency to evaluate ground motion during earthquakes using two-dimensional model. Then, studies on irregular topographies are carried out, and diagrams of amplification factors are shown.
Keywords
2D transfer function; irregular topographies; seismic site response;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
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