Burning Influence on Load Capacity of Steel -Reinforced Concrete (SRC) Column

This paper presents an experimental study on the influence of real fire flame on the Load Capacity of Steel-Reinforced Concrete (SRC) Columns. A ten reduced scale SRC column specimens have the same dimensions and the same reinforcement were tested. But with different temperature levels (25,350, 550 and 750 ?C), a compressive strength of concrete (30.29MPa and 40.41MPa) named series C1 and C2 correspondingly, and eccentricity (0, and 40mm). After curing and at age more than 28 days seven specimens were exposed to fire flame from 4 sides for a one-hour time period, then cool down to ambient temperature naturally, after that they have been tested with three unburned columns (control specimens) to failure under loading. The results illustrated a significant reduction in the ultimate load for all column specimens after fire flame exposure. The residual ultimate load at a temperature levels of (350,550, and 750 ?C) for concentric loading was (91.6%,78.5%, and 57.4%) for series C1 and (85.3%,73.4%, and 53.5%) for series C2 respectively, whereas residual ultimate load at a temperature of (550 ?C) and eccentrically loaded at (e = 40mm) was (74.1%) for series C1.