Estimation of reinforced concrete seismic resistance bearing systems exposed to fire

7th International Symposium Actual Problems of Computational Simulation in Civil Engineering

土木建筑工程;计算机科学

Avetisyan, L.A.^1 ; Chapidze, O.D.^1

National Research Moscow State University of Civil Engineering Moscow, Yaroslavskoye Shosse, 26, 129337, Russia^1

关键词: Calculation results;    Horizontal movements;    Multistorey buildings;    Natural oscillation;    Reinforced concrete frame buildings;    Reinforced concrete frames;    Seismic resistance;    Stress strain state;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/456/1/012035/pdf
DOI  :  10.1088/1757-899X/456/1/012035

来源: IOP

【 摘 要 】

The article presents the calculation results for a 12-storey reinforced concrete frame building, which is exposed to fire effects. The results of building calculations are given for different combinations of operating and special loads. The analysis shows that the seismic effect during fire impacts changes the building frame's Stress-strain state: it leads to a change in the dynamic strength and deformation characteristics of the bearing elements of the building, bearing elements, and the fire resistance of the structure is reduced. The reinforced concrete frame calculation of a multi-storey building for seismic load showed that the maximum deformation was: along the X axis, 32.852 mm, along the Y axis - 36.762 mm. According to a building analysis for seismic load (9 degrees intensity) simultaneous with fire impacts, the frequencies of the building's natural oscillations increase by 13.8%. Horizontal movements increase by 1.65 times.