Optimization of Two Soil–Structure Interaction Parameters Using Dynamic Centrifuge Tests and an Analytical Approach

Abstract

The response of the structure subjected to an earthquake load is greatly affected by the properties of the structure and soil so it is very important to accurately determine the characteristics of the structure and soil for analysis. However, studies on the effective profile depth where soil properties are determined, have been conducted in the presence of restricted conditions (i.e., surface foundation, linear soil properties), and without any considerations on damping. In case of the effective height of structure that affects its rocking behavior, it was only theoretically or empirically determined. In addition, most previously published studies on soil–structure interaction (SSI) focused on limited effects and parameters (e.g., rocking behavior, embedment effect, effective profile depth, spring constant, and damping coefficient) and not on comprehensive SSI parameters. Furthermore, no detailed validation procedure has been set in place which made it difficult to validate the SSI parameters. Since the effective height of structure and effective profile depth are the basis of all the input parameters of SSI analysis, it is important to validate and determine them. Therefore, in this study, the procedure used to optimize the two SSI parameters was established based on an analytical approach that considered all the possible SSI parameters that were investigated from conventional codes and studies and physical model tests. As a result of this study, the optimum values of the effective height of the structure and effective profile depth were respectively determined according to (a) the height from the bottom part of the foundation to the center of the mass of the superstructure, and according to (b) the depth at values equal to four times the radius of the foundation.

Effect of Embedded Basement Stories on Seismic Response of Low-Rise Building Frames Considering SSI via Small Shaking Table Tests

“…While Mylonakis et al [16] used the simplified expressions for computing the kinematic response of footings under seismic loading. Later, Kim et al [17] improved two SSI parameters using the dynamic centrifuge tests and analytical approach.…”

Investigation of Small-Scaled Soil Structure Model under Earthquake Loads via Small Shaking Table Tests

“…Both components are generally a ected by the seismic structural response [1,2]. Most of the researchers focus on analytical [3][4][5] and numerical studies [6][7][8][9] more than on experimental investigations [10,11]. Pioneering work was proposed to develop the hybrid numerical method ( nite element method, moving particle simulation) to simulate the complex dynamic behavior of structures [12].…”