Fire Endurance of Simply - Supported Prestressed Concrete Slabs

Fuzzy logic model for prediction of mechanical properties of lightweight concrete exposed to high temperature

“…The effects of high temperature on the mechanical properties of concrete have been investigated since the middle of the 20th century [7][8][9][10][11][12][13][14]. The fire resistance capacity of concrete is complicated because not only is concrete a composite material with components having different thermal characteristics, it also has properties that depend on moisture and porosity [12].…”

Structural Fire Protection

“…The tensile strength of the concrete and steel near the bottom of the slab will decrease as the temperature increases. When the strength of the steel at elevated temperature reduces to that of the stress in the steel, flexural collapse will occur (Gustaferro and Selvaggio 1967). The nominal moment strength will be constant throughout the length:…”

“…More information is given in Fire Technology (Harmathy 1965), in which the author introduced ten general rules for fire resistance. More information is also given in other sources, where the basis of several of the extension rules given below can be found , Abrams and Gustaferro 1969, Gustaferro and Selvaggio 1967.…”

Fire Resistance of Post-Tensioned Structures

“…Such behavior has been clearly demonstrated in prestressed as well as reinforced concrete members. 2 It is apparent from the above description that the steel temperature at which collapse occurs depends on (1) the stress in the steel, and (2) the type of steel.…”