混凝土损伤的超声检测试验研究

TEST RESEARCH ON ULTRASONIC TESTING OF CONCRETE DAMAGE

从损伤力学的角度对混凝土早期受损及其后期强度进行理论分析,并用超声检测技术进行混凝土损伤试验,提出了混凝土损伤的临界声速比。当声速比大于临界值时,混凝土后期的强度可以满足设计要求;当声速比小于临界值时,其后期强度同比下降很大,不能满足结构设计的要求。为混凝土损伤研究提供了一种新的途径。

The early damage and strength of concrete were analyzed based on damage mechanics. Ultrasonic testing was carried out in concrete damage test and the critical value of sound velocity of early damage concrete was given. When sound velocity ratio was bigger than critical value, the later concrete strength could meet the needs of design. When sound velocity ratio was smaller than critical value, the later concrete strength could not meet the needs of design. A method was offered for the study of concrete damage.