عنوان البحث(Papers / Research Title)
athematical Models for Prediction of Some Mechanical Properties of Concrete Exposed to Burning
الناشر \ المحرر \ الكاتب (Author / Editor / Publisher)
سيف صلاح مهدي القزويني
Citation Information
سيف,صلاح,مهدي,القزويني ,athematical Models for Prediction of Some Mechanical Properties of Concrete Exposed to Burning , Time 5/21/2011 6:01:30 PM : كلية الهندسة
وصف الابستركت (Abstract)
some mechanical properties of high strength concrete under the effect of fire flame exposure is presented.
الوصف الكامل (Full Abstract)
Abstract In this study, some mechanical properties of high strength concrete under the effect of fire flame exposure is presented. The concrete specimens were subjected to fire flame temperatures ranging from ( 20-850 °C) at different ages of 30 , 60 and 90 days. Three temperature levels of 400°C , 600°C and 850°C were chosen of exposure duration of 2.0 hours. After burning, the concrete specimens were quenched in a water tank to provide the maximum shock due to sudden cooling. The test results showed that the density, compressive strength, tensile and flexural strength decreases when the fire flame temperatures were increased. mathematical models were proposed to predict the compressive strength, splitting tensile strength and flexural strength of concrete after exposure to fire flame. These models made by statistical program called (DATA FIT 9.0.59, 2009). Introduction In the structural design of buildings, in addition to the normal gravity and lateral loads, it is in many cases necessary to design the structure to safely resist exposure to fire. However it is usually necessary to guard against structural collapse for a given period of time Shetty ( 1988) . Several investigations have shown that the deterioration in the compressive strength of concrete under high temperature exposure. There are indeed rare researches about temperature gradient and exposure time of the concrete indirect contact with the fire flames. In this study there is an attempt to investigate the effect of temperature gradient and exposure of high strength concrete to fire flames on compressive strength, tensile strength and flexural strength of high strength concrete
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