الفهرس 
ABSTRACT
High Strength ConcreteOnly 14 pages are availabe for public view
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Abstract
The objective of this study is to investigate the residual load of high strength concrete specimens subjected to high temperature. To achieve this objective, experimental and theoretical study is carried out.
The experimental study presents the results of twenty nine high strength short specimens 10×10×40cm subjected to static loading until failure after exposed to high temperature. Different parameters were considered during this study such as percentage of longitudinal reinforcement, thickness of concrete cover, cooling system and temperature degree.
Also, theoretical program conducted to investigate the reduction in residual compressive capacity of HSC specimens subjected to high temperature. The parameters used in the program are thickness of concrete cover, steel ratio, concrete strength, confinement ratio, and eccentricity of loads.
The analysis of results obtained from the experimental and theoretical program showed that increase in concrete cover improved fire resistance for concrete structures and providing a good protection for the reinforcement steel bars. Also, increasing in steel ratio is very insensitive in increasing fire resistance for concrete structures.
Also, the results showed that the compressive strength of high strength concrete has a little change until 400˚C, however beyond this degree of temperature a higher reduction of the compressive strength in noticed reach to 55% at 800˚C compared with specimens at room temperature. Also, cooling in water decrease the residual strength by 36% compared with cooling at air. Finally, it is achieved close agreement between the experimental results and the results of theoretical model.