Nonlinear Seismic Analysis of Layered Soils using Hybrid Frequency-time Domain Approach Considering Multidirectional Seismic Loading
نویسندگان
1 Department of Mechanical Engineering, Mechanical Engineering Faculty, Empress Catherine II Saint Petersburg Mining University, Saint-Petersburg, Russia
2 Department of Mechanical Engineering, Mechanical Engineering Faculty, Empress Catherine II Saint Petersburg Mining University, Saint-Petersburg, Russia
3 Department of Mechanical Engineering,Mechanical Engineering Faculty, Empress Catherine II Saint Petersburg Mining University, Saint-Petersburg, Russia
4 Department of Mechanical Engineering, Mechanical Engineering Faculty, Empress Catherine II Saint Petersburg Mining University, Saint-Petersburg, Russia
doi
10.5829/ije.2026.39.11b.16چکیده
This study considers the effects of multidirectional (horizontal and vertical) loading on ground response analysis using a simple and practical approach and applying the Hybrid Frequency-Time Domain (HFTD) method. In this process, by employing a matrix method, applying Snell's law, and utilizing the P-wave and S-wave velocities of the bedrock and soil layers, the effects of both horizontal and vertical earthquake motion, fault-to-site distance, and the angle of wave incidence on the bedrock are simultaneously considered. A computer program is developed in MATLAB to validate the proposed method. Two reference sites were selected and analyzed, Gilroy and Turkey Flat, subjected to the Loma Prieta and Parkfield earthquakes, respectively, using the proposed method and the DEEPSOIL software. The results obtained from the proposed method were in good agreement with the field observations and the DEEPSOIL software. Furthermore, the investigations revealed that the presence of groundwater and the effects of the wave incidence angle are among the influential parameters on the proposed method's horizontal and vertical responses.
