Numerical advanced analysis of steel-concrete composite beams and columns under fire

It is well known that high temperature causes changes in physical properties and mechanical strength of materials. In both steel and concrete, material properties deteriorate during the exposure to fire, and a steel, RC or composite structure load capacity and stiffness are reduced significantly as a consequence. The use of computational models as methodology of analysis/design has as advantage of capturing the strength and stability of the structural system and its members directly. This work shows the efficiency of the CS-ASA/FSA FE code in the analysis of insulated steel-concrete composite structural elements, such as beams and columns, in a fire situation. This approach performs the inelastic second-order analysis of composite structures under fire considering the refined plastic hinge method coupled to the strain compatibility method. Several composite structures in fire situation are analyzed using the developed tool.