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IJSCER 2025 Vol.14(3): 55-61
DOI: 10.18178/ijscer.2025.14.3.55-61

A Simplified SDOF Model for Loss Estimation Evaluating Seismic Resilience

Joon-Ho Lee1,* and Yu-Seong Kim2
1 Department of Architectural Engineering, Seoul University, Seoul, Republic of Korea
2 Hub Structural Engineering Inc., Seoul, Republic of Korea
Email: joonho.lee.97@gmail.com (J.H.L.); batman0961@gmail.com (Y.S.K.)
*Corresponding author

Manuscript received January 24, 2025; accept May 25, 2025; published August 21, 2025.

Abstract—This study introduces a resilience performance evaluation method for structures, which assesses their ability to recover following an earthquake disaster. The resilience evaluation approach quantifies recovery capacity through a loss estimation model and a recovery evaluation model. The recovery evaluation model considers both repair time and downtime, while the loss estimation model includes not only direct damage to structural and non-structural components but also indirect losses due to functional disruption. To develop an efficient loss estimation model, structural simplification is required. Accordingly, this study proposes an equivalent terminal induction system, applying both Cantilever-Type and Rahmen-Type Single-Degree-of-Freedom (SDOF) models. The evaluation results indicate a slightly conservative estimate compared to the example structure, suggesting that further improvements in hysteresis behavior could be achieved by incorporating a stiffness reduction factor into the SDOF model.

Keywords—resilience based design, seismic fragility analysis, SDOF System, incremental dynamic analysis

Cite: Joon-Ho Lee and Yu-Seong Kim, "A Simplified SDOF Model for Loss Estimation Evaluating Seismic Resilience," International Journal of Structural and Civil Engineering Research, Vol. 14, No. 3, pp. 55-61, 2025.

Copyright © 2025 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).