Numerical model for tracing the response of <scp>Ultra?High</scp> performance concrete beams exposed to fire

This paper presents a numerical procedure for evaluating the thermo-mechanical response of Ultra-High Performance Concrete (UHPC) beams exposed to fire. The model is based on macroscopic finite element formulation and utilizes sectional moment-curvature relations trace UHPC from linear elastic stage collapse under combined effects fire structural loading. Fire-induced spalling, temperature-dependent properties concrete steel reinforcement, realistic failure criteria are incorporated into analysis. Specifically, an advanced analysis approach spalling in by considering stresses arising thermal gradients, loading, pore pressure generated section. Comparisons predictions with data resistance experiments show good correlation, indicating proposed can reliably predict response, including extent subjected exposure. applicability undertaking shown conducting case study illustrate influence load level scenario beams.