Fire Resistance Performance Evaluation of Structures Damaged by Earthquake
Year: 2026
Type: article
Abstract: This study presents a sequential numerical framework to evaluate the fire- resistance performance of earthquake-damaged structures under fire-following earthquake conditions. A nonlinear seismic analysis is conducted to determine the post-earthquake damage states of the structure, including residual deformation and stress redistribution. Subsequently, a thermal stress analysis is performed by directly transferring the damaged structural state as an initial condition for the realistic assessment of structural behavior under fire exposure. The numerical results are utilized to investigate the degradation in fire resistance caused by prior seismic damage; a fragility analysis is conducted to quantify the probability of exceeding fire-resistance limit states. The results confirm that earthquake-induced damage significantly reduce the fire resistance performance of the structures, even under identical fire exposure conditions. The fire resistance of protected steel structures may be overestimated if seismic damage is not considered.
Source: Fire science and engineering
Author: Hee-Du Lee
Institution: Pukyong National University
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
Funder: Pukyong National University
OpenAlex ID: W7160175409