Authors:
Raneen Aldarf; Muneeb Al-Allaf; Abdulrazak Salem; Hani Meree; Falah Mubark;
Abstract:
This study investigated the behavior of two-way reinforced concrete slabs exposed to direct fire. The slabs were exposed to fire for one hour in a gas furnace. The flame spread area was varied by increasing the number of fire sources from three to six. The slabs were cooled in two different ways: gradual cooling and sudden cooling. The results showed that the flame spread area had a significant effect on the load-carrying capacity and deflection of the slabs. The load-carrying capacity decreased by 20.68% with gradual cooling and 33.78% with sudden cooling when the flame spread area was increased. The deflection at failure increased by 26.26% with gradual cooling and 33.78% with sudden cooling when the flame spread area was increased.
Keywords:
Reinforced solid concrete slabs; Direct fire flame; Thermal flames; Cooling method.