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《Journal of Vibration and Shock》 2013-05
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Experimental research on AFRP confined concrete under repeated impact

LIANG Lei~1,GU Qiang-kang~1,YUAN Lu~2 (1.The Engineering Institute,Air Force Engineering University,Xi'an 710038,China; 2.The 94285 Force of Chinese PLA,Shandong Weifang 261000,China)  
To study the dynamic mechanical properties of Aramid Fiber-reinforced Plastic(AFRP) confined concrete under the impact of repeated dynamic load,usingΦ100mm split hopkinson pressure bar(SHPB),the dynamic mechanical properties of three kinds of concrete with different strength,(C30,C40 and C50),confined with 1 ~3 layers AFRP,were tested under a similar strain rate condition.Through an ultrasonic non-destructive test,the internal damage of concrete specimens was inspected after each impact.The results show that the dynamic peak stress of 1 ~3 layers AFRP confined concrete is insensitive to the number of impact cycles.Its fluctuation is less than 8%and it is shown that AFRP confined concrete is steady;the dynamic peak strain and the damage of inner concrete are increasing with the increase of impact frequency,and the damage factor is in linear relation with the number of impact cycles;AFRP confined concrete keeps the shape as a whole test piece when the damage of inner concrete reaches the utmost limit of common concrete under the same situation.Furthermore,the AFRP confined concrete test piece retains the ability to withstand next impact.
【Fund】: 军队科研项目(KHZ041706)
【CateGory Index】: TU528.572
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