Study on the Fire Resistance Performance of Axially Constrained Steel RPC Concrete Irregular Columns
To investigate the fire resistance performance of axially confined irregular columns made of steel Reactive Powder Concrete(RPC),a thermal-stress sequential coupling model for steel RPC concrete irregular columns under fire was established using the finite element software ABAQUS.The study examines the effects of parameters such as loading angle,load ratio,and eccentricity on their fire resistance performance.Results show that within a certain range of loading angles,the fire resistance performance of steel RPC concrete irregular columns increases with the loading angle.Additionally,the load ratio and eccentricity are significant factors affecting the fire resistance performance,with an increase leading to a decrease in the fire resistance limit of the components.The fire resistance performance of steel RPC concrete irregular columns is increasingly influenced by factors such as eccentricity,loading angle,and load ratio,ultimately resulting in brittle failure,with axial deformation exhibiting three stages of essentially constant,slow decline,and linear decline.These findings can provide a theoretical basis for the fire design of such structures.
Steel concrete Irregular ColumnsAxial confinementFire resistance performanceTemperature fieldFinite element method
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