声发射与超声波联合测试混凝土构件损伤量试验研究

Experiment research on measurement of concrete damage quantity based on technology with acoustic emission and ultrasonic combined

依据损伤力学理论推导声发射和超声波技术联合测试混凝土试件损伤量的可行性。制作C60混凝土试件,采取加速腐蚀与浸烘循环结合的方法使混凝土试件腐蚀劣化,测试试件超声波速和声发射参数,计算混凝土的损伤量并与实测试件的损伤量进行比对。结果表明:采用声发射和超声波联合技术可以获得混凝土的损伤量,但需要继续优化参数的取值使之与实测值吻合。

The feasibility of concrete damage amount measured by acoustic emission and ultrasonic combined based on damage mechanics theory was deduced.The concrete specimen of C60 were made,with the methods of accelerated corrosion and sock drying cycle to obtain the specimen degradation.The parameters of acoustic emission and ultrasonic were tested,and the damage amount of concrete were calculated compared with the actual concrete specimen.The results show it is possible to obtain the concrete damage amount,but to continue to optimization of parameters according with the exact data.