Optimization of frequency domain impedances for time-domain response analyses of building structures with rigid shallow foundations

The effects of dynamic soil–structure interaction (SSI) have been extensively studied in the last few decades, and proper analysis for linear elastic case frequency domain has established successfully. However, SSI is rarely considered design building structures, instead, buildings are frequently analyzed using a rigid base assumption quasi-static loading conditions that ignore its nature. Acknowledging these shortcomings, National Institute Standards Technology (NIST) published 2012 set recommendations on time-domain analyses structures compatible with standard finite element packages consideration engineering design. so-called NIST GCR 12-917-21 report introduced major simplification to enable tools be implemented time analyses. That is, replacing frequency-dependent soil impedance functions by single-valued read at flexible-base structure frequency; This work seeks quantify accuracy this considering fully coupled two-dimensional (2D) models (FEM) as reference. Using Bayesian approach based ensemble Kalman inversion (EnKI) range numerical simulations soil–foundation–building interaction, we estimate optimal can used analyses; evaluate improvement corresponding offers relative full FEM results when compared performed accordance outlined above.