Study on static and dynamic mechanical properties of concreteafter high temperature

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Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (20) : 16-19.

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Study on static and dynamic mechanical properties of concreteafter high temperature

WANG Yu-tao1，LIU Dian-shu1，LI Sheng-lin1，FENG Ya-fei2

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Abstract

Through the high temperature heating system of C30 and C50 two kinds of strength grade of concrete under different temperature conditions of uniform heating and after natural cooling, using Φ 75 mm SHPB experiment device, ultrasonic measurement technology and test press to impact dynamic and static compression test of concrete specimens before and after the high temperature. The experimental results showed that: With the increase of temperature, vertical wave, static compressive strength and elastic modulus are both the decrease of the different degree,the overall trend is consistent.Damage increased with the temperature increasing and the temperature of 400 ℃ and 700 ℃ is the turning point of its obvious change;After different high temperature cooling, the dynamic damage of concrete strength is decreasing but the peak of strain is increasing.Stress-strain curve becomes more smooth and the plastic flow phenomenon, this phenomenon with the rising of temperature is more and more obvious.

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behind high temperature / concrete / SHPB / static mechanics performance / dynamic mechanics performance / damage

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WANG Yu-tao;LIU Dian-shu;LI Sheng-lin;FENG Ya-fei. Study on static and dynamic mechanical properties of concreteafter high temperature[J]. Journal of Vibration and Shock, 2014, 33(20): 16-19