【摘要】 采用RMT-150岩石力学实验机对标准混凝土试样进行单轴压缩实验,利用KBD5电磁辐射监测仪对试样加载直至破坏全过程的电磁辐射强度和脉冲数进行监测.结果表明:混凝土在受压作用下产生电磁辐射信号,其强度和脉冲数随时间变化呈相近的趋势,随载荷的增大而增强,在主破裂时刻电磁辐射信号急剧增大;混凝土的强度越大,电磁辐射信号越强;加载速率越大,电磁辐射信号也越强.电磁辐射信号能较好地反应试样的受力和变形破坏状态.因此开展混凝土电磁辐射的研究对于工程中混凝土的安全性评价、混凝土强度的预测等具有一定的理论意义和应用前景.更多还原

【Abstract】 RMT- 150 rock mechanics testing machine is adopted to make a uniaxial compression experiment on standard concrete sample,and KBD5 electromagnetic radiation logger is used to monitor the electromagnetic radiation strength and the pulse number in the whole process of sample’s loading until failure.Results show that concrete can produce electromagnetic emission signal in pressure,and a similar tend is produced between the strength and the pulse number of electromagnetic emission as the change of time.Electromagnetic emission signals become stronger with increasing pressures,and it increases sharply in main fracture; the greater strength of concrete,the stronger electromagnetic emission signals are; the higher the loading rate,the stronger electromagnetic emission signals are. The electromagnetic radiation signals can reflect the specimen’s stress,deformation and failure state. Thus the study about concrete electromagnetic radiation has theoretical significance and application prospects for the safety assessment,strength prediction of concrete in the engineering field.更多还原