| Summary: | 碩士 === 元智大學 === 機械工程學系 === 100 === In recent years, the population continues to increase make the building continue to build more buildings. When building fire happened, it usually caused properties loss, casualties and so on. Reinforced concrete nowadays is a generally of building materials. Reinforced concrete structure will be a large number of beams, columns, floor or wall. Beam structural system to withstand the bending moment and shear component. Therefore, this research is investigation of reinforced concrete beams by the mechanical properties change after fire damage. The mechanical properties include concrete compressive strength, modulus of elasticity, steel yield strength and so on. These mechanical properties due to fire and high temperature erosion cause by the internal strength reduction of reinforced concrete. Strength reduced to a certain extent so that the reinforced concrete will induce destruction. For accurate analysis of reinforced concrete beams after the fire and the situation of high temperature transmitted to internal. This research used the FDS (Fire Dynamics Simulation) which is fire heat flow analysis software simulation heat flow field in the fire. The FDS simulation result of temperature boundary set into PHOENICS which is computational fluid dynamics software for analysis beams internal temperature and mechanical properties, then validation with the literature to conform simulation accuracy. Finally, compute the failure mode of beams to assessment structural strength after fire, and whether it can continue to use.
|
|---|
