Assessment of the Effects of Soil-Structure Interaction on Steel Moment Frames Retrofitted with TADAS Yielding Dampers

Articles in Press

Document Type : Research Article

Authors

1 Shahid Rajaee Teacher Training University

2 Faculty of Civil Engineering, Tarbiat Debir Shahid Rajaee University, Tehran, Iran

3 Department of Geotechnical Engineering and Water Engineering, Shahid Rajaee Teacher Training University

10.22060/ceej.2025.23580.8185

Abstract

Yielding dampers are a common passive control system used to improve structural seismic performance. However, soil flexibility and energy dissipation within the soil-structure system can influence the performance of these dampers under seismic loading. This study examines the combined effects of soil-structure interaction (SSI) and yielding dampers on 3- and 9-story steel moment frames subjected to three soil conditions and two seismic hazard levels. Nonlinear time history dynamic analysis assesses the effectiveness of these systems using seismic performance criteria like fundamental period, relative displacement, absolute acceleration, and base shear.

Results show that adding TADAS yielding dampers reduces the fundamental period in both short- and mid-rise frames. However, incorporating SSI increases the fundamental period in both cases. With dampers, acceleration in middle and upper stories increases more significantly than in lower stories at both hazard levels. SSI intensifies this increase at the Maximum Considered Earthquake (MCE) level but slightly moderates it at the Design Basis Earthquake (DBE) level. Conversely, SSI significantly increases story drift in lower stories of both frames at both hazard levels, unlike in upper stories. Adding dampers reduces base shear in both frames at both hazard levels, and SSI amplifies this reduction, especially in the 9-story frame.

Keywords

Main Subjects

Amirkabir Journal of Civil Engineering

Articles in Press, Accepted Manuscript
Available Online from 16 June 2025

Files

Share

How to cite

Statistics