超声波法检测混凝土工作应力状态试验研究

摘要

The work stress of concrete is one of the most important factors on evaluating the concrete structure's safety in service.The influence of curing age and specimen size on the ultrasonic wave velocity is studied by ultrasonic testing of the concrete specimens in uniaxial compression.Based on the experiment,the relative velocity coefficient and stress of the concrete damage coefficient are defined,the relationship formula between concrete work stress and ultrasonic velocity is derived,and two kinds of evaluation methods of concrete working stress are concluded.It provides a reference for the detection of working stress of concrete structure.%混凝土结构的工作应力是评价在役结构安全性的最重要的指标之一.本文通过混凝土试件单向轴压超声波检测试验,研究了养护龄期及试件尺寸对超声波传播速度的影响.在试验的基础上,定义了相对波速系数和混凝土应力损伤系数,得出了混凝土工作应力和超声波波速关系的公式,提出两种评价混凝土工作应力的方法,为混凝土结构工作应力的检测提供参考.