Performance of parking steel column damaged by fire

Abstract

Purpose The primary purpose of this research was to expand the knowledge base regarding the behavior of steel columns during exposure to fire. This paper presents the numerical study of the effect of heat on the performance of parking steel column in a seven-story steel building under cyclic loading. Design/methodology/approach In this research, the forces and deformations developed during a fire are estimated by using detailed 3D finite-element models. The analyses are in the form of a coupled thermo-mechanical analysis in two types of loading: concurrent loading (fire and cyclic loading) and non-concurrent loading (first fire and then cyclically), and the analyses have been conducted in both states of the fire loading with cooling and without cooling using the ABAQUS software. Further, it was investigated whether, during the fire loading, the specimen was protected by a 3-cm-thick concrete coating and how much it changes the seismic performance. After verification of the specimen with the experimental test results, the column model was investigated under different loading conditions. Findings The result of analyses indicates that the effect of thermal damage on the performance of steel columns, when cooling is happening late, is more than the state in which cooling occurs immediately after the fire. In this paper, thermal–seismic performance of parking steel columns has been specified and the effect of the fire damage has been investigated for the protected steel by concrete coating and to the non-protected steel, under both cooling and non-cooling states. Originality/value This study led to recommendations based on the findings and suggestions for additional work to support performance-based fire engineering. It is clear that predicting force and deformation on steel column during fire is complex and it is affected by many variables. Here in this paper, those variables are examined and proper results have been achieved.

Performance of steel-plate shear wall at high temperature

“…Aftershocks and main earthquake can occur with intervals of minutes or hours or even days where the consecutive occurrence of these incidents (earthquake and fire) can cause an early collapse of the structure damaged during the former fire. Indeed, the fire-induced high heat results in a decrease in the yield stress, elasticity modulus, strength and stiffness of the steel structure (Masoumi and Farajpourbonab, 2018; Rackauskaite et al , 2019), and finally, lowering the seismic performance of the steel structure (Tariq et al , 2019; Shan et al , 2019; Qin and Mahmoud, 2019; Tang et al , 2019). In recent years, various types of resistant systems (e.g.…”

“…Fire-induced high heat can severely reduce yield stress and elasticity modulus of steel (CEN, 2005), leading to a decrease in strength, stiffness and, consequently, the seismic performance of steel structures (Masoumi and Farajpourbonab, 2018; Qin and Mahmoud, 2019; Mahmoud et al , 2016). To reach these desired characteristics, the thin infill plate should be designed so that it undergoes buckling before the demolition (yield or buckling) of other peripheral boundary components and is yielded by further structure drift.…”