Numerical Simulation for Predicting Fire Behavior of Axially Loaded Circular Concrete Filled Steel Tubular Columns

Abstract:

The present study investigates the behavior of axial loaded circular concrete filled hollow steel section (CFHSS) columns. A nonlinear finite element model using ABAQUS program was developed to investigate the fire behavior of the inspected columns from previous fire tests. The study variables include column dimensions, steel section wall thickness, concrete strength, concrete types (plain or reinforced), and fire protection thickness. The comparison indicated that the results obtained from the model were within acceptable limit of accuracy of 15%. A sensitivity study was carried out to investigate the influence of the output of the numerical model including the Poisson’s ratio of concrete, thermal conductance at the steel-concrete interface, frictional contact at steel-concrete interface, and imperfection buckling of columns. Based on the sensitivity analysis, several modelling suggestions were given in this paper which will be beneficial for further study.

• Periodical: Applied Mechanics and Materials (Volumes 752-753)
• Pages: 507-512
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.752-753.507
• Online since: April 2015
• Authors: Ahmad Nurfaidhi Rizalman*, Mahmood Md Tahir, Shahrin Mohammad, Arizu Sulaiman
• Keywords: Concrete Filled Hollow Steel Section Columns, Finite Element Analysis (FEA), Fire Resistance Rating

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