Abstract : The fire, caused by a short circuit, burned for about 15–30 minutes in a jewellery shop in Jodhpur. Rajasthan India. The fire brigade arrived 30 minutes later at the scene and brought the situation under control. After the fire, this case was carried out under the supervision of senior professors from MBM University Jodhpur along with research scholars. This study evaluates the residual strength of fire-damaged reinforced concrete structures using an analytical approach based on heat transfer principles, as outlined in Eurocode and ISO 834 standards. The time-temperature curve derived from the fire exposure equation demonstrates a temperature rise from 20°C to approximately 1455°C, highlighting the thermal effects on structural components. Simulation techniques and Rapid Visual Screening (RVS) methods were used to assess post-fire residual strength, revealing notable variations. The comparative analysis indicates that RVS generally predicts higher strength than simulation by Abaqus, except for components C3 and S1, where simulation results suggest greater residual strength. The largest deviation (+12.5 MPa) occurs in B1, where RVS significantly overestimates strength, while the most negative difference (-10.5 MPa) is found in S1, implying that RVS underestimates strength in certain cases. The correlation between temperature exposure and strength reduction emphasizes the need for integrated assessment methods. The findings underscore the necessity of combining RVS with simulation-based techniques for accurate post-fire structural evaluation. This approach enhances the reliability of damage assessment and informs effective repair, retrofitting, and rehabilitation strategies for fire-affected buildings..
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