Interaction Model for Unprotected Concrete Filled Steel Columns Under Standard Fire Conditions

摘要: This paper extends the Rankine method to analyses of reinforced concrete filled steel (RCFS) columns and plain (PCFS) at elevated temperature. The advantage this approach is that it gives structural engineers a physical feel adequacy column in terms its plastic squashing capacity elastic buckling capacity. hinges on concept modified coefficient, which equally applicable for both axially eccentrically loaded columns. A novel feature fire resistance expressed ambient mean agreement between predictions test results RCFS (61 columns) PCFS (95 satisfactory. includes worked example illustrate flexibility approach, also comments accuracy when applied other types such as or