Akademik Veri Yönetim Sistemi
3rd International Civil Engineering & Architecture Conference (ICEARC'23), Trabzon, Türkiye, 12 - 14 Ekim 2023, cilt.1, ss.1032-1038
Purpose: The aim of this study was to determine the behavior
of a multi-story steel structure under a potential fire scenario using
thermo-mechanical analysis. The displacements, drift ratios, and strain
distributions along the columns within the structure were obtained at the peak temperature
of the fire. Study design/methodology/approach: A multi-story structure model with
a high probability of fire occurrence was selected for the study, and the
OpenSees framework was used to prepare the structural geometry. Initially, a
static analysis was conducted under the self-weight of the structure and live
loads (cars), followed by a dynamic pseudo-static analysis under thermal
loading. The fire edition of OpenSees (OpenSees for fire) was used to distribute
the fire load to the structure. The materials were characterized as a temperaturedependent
steel material class <Steel01Thermal>, which has a bilinear stress-strain
relationship.
Findings: Based on the analysis results, the highest
displacements occured on the 1st floor, where the temperature was also the
highest. Similarly, the drifts reached significantly high values at points
where the temperature exceeded 900°C. In conclusion, it is impossible to
maintain the stability of structures during such fire events.
Originality/value: The findings of this study can potentially enhance
the fire design of multi-story structures. Furthermore, understanding how
multi-story steel structures would behave in an actual fire scenario will provide
insights into the regions within the structure where the most significant
damage might occur. Investigating how the behavior changes in multi-story
structures under various fire scenarios would be beneficial for future
research.