مشخصات پژوهش

Steel columns are critical vertical load-bearing members in building structures, yet the prediction of their behavior under fire remains challenging due to the complex interaction between thermal degradation, boundary restraints, and potential dynamic effects during instability. Previous studies have not provided a unified approach for evaluating both static and dynamic responses of columns subjected to fire, and the selection of a method that accurately accounts for boundary conditions, material degradation, and axial restraints remains unclear. This thesis addresses this gap by developing a validated numerical modeling framework capable of capturing the coupled thermal–mechanical response of steel columns exposed to fire. By employing advanced finite element techniques and dynamic analysis strategies, the proposed approach enables a comprehensive assessment of load-bearing capacity, buckling mechanisms, and deformation demands, offering new insights for performance-based structural fire engineering and providing a systematic methodology for future research in this field.