Investigation and effect of advanced dynamic designs for geotechnical earthquakeengineering applications

The design of geotechnical structures under earthquake loading employs various analytical andnumerical approaches, each with differing complexities. Simplified dynamic analyses often usethe pseudo-static method with seismic actions derived from free-field ground responsesimulations. Equivalent linear or nonlinear models predict site effects by approximating soildynamics. Nonlinear time-domain schemes, including hyperbolic models and incrementalplasticity models, simulate soil behavior under seismic loads. Advanced numerical approaches likeFinite Element Method (FEM) and Finite Difference Method (FDM) enable comprehensivemodeling but increase computational demands. Effective stress-based elasto-plastic soil models,though sophisticated, require precise calibration and specialized data, posing challenges forwidespread adoption. The study focuses on using FEM for seismic analysis of geotechnicalstructures, addressing fully coupled solid–fluid interaction, Rayleigh damping, soil modelcalibration, dynamic boundary conditions, and seismic input scaling strategies. Insights fromrecent research are provided to enhance confidence in using dynamic FE schemes, highlightingthe importance of accurate boundary conditions, effective stress formulations, and robust inputmotion selection for reliable numerical results.

کلیدواژه ها:

Geotechnical structures ، earthquake loading ، numerical methods ، pseudo-static