基于压电波动法的混凝土梁裂缝深度与位置监测  

Monitoring of crack depth and location of concrete beam based on piezoelectric wave method

作　　者：熊飞 苏波[1] 王岗 XIONG Fei;SU Bo;WANG Gang(Faculty of Civil Engineering and Mechanics,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]江苏大学土木工程与力学学院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2022年第3期359-365,共7页Journal of Jiangsu University：Natural Science Edition

基　　金：“十二五”国家科技支撑计划项目(2015BAL02B02);江苏大学青年扶持基金资助项目(5621480001)。

摘　　要：为了研究混凝土梁裂缝深度和裂缝位置对压电陶瓷驱动接收效果的影响,首先采用ABAQUS软件,对不同激励源下健康混凝土梁模型的输出信号进行了模拟分析,以确定激励源最优频率,对压电片参数的形状、尺寸和厚度进行优化.然后对健康混凝土梁模型和存在不同深度、位置裂缝的有损伤混凝土梁模型的输出信号特征进行了模拟分析.最后开展了压电波动试验,对健康混凝土梁和有损伤混凝土梁进行了监测分析.研究结果表明:压电陶瓷输出信号强度和小波包能量随着裂缝深度的增加而逐渐减小;贯穿裂缝与发射端传感器距离越近,接收端传感器显示的信号愈强烈,而距离越远,信号衰减程度增大.To investigate the influence of crack depth and position of concrete beams on the driving and receiving effect of piezoelectric ceramics,ABAQUS software was used to simulate the output signals of healthy concrete beam model under different excitation sources.To determine the optimal excitation frequency and optimize the characteristics of piezoelectric sheet of shape,size and thickness,the output signals of healthy concrete beam model and damaged concrete beam models with cracks in different depths and positions were simulated and analyzed.The piezoelectric wave test was carried out to monitor the damaged and healthy concrete beam models.The results show that the output signal strength and wavelet packet energy are decreased with the increasing of crack depth.The closer the distance between penetrating crack and transmitting sensor is,the stronger the signal displayed by the sensor at the receiving end is.On the contrary,the farther the distance is,the larger the signal attenuation becomes.

关 键 词：混凝土梁 裂缝 压电波动法 小波包分析 有限元分析 结构健康检测 

分 类 号：TU528.7[建筑科学—建筑技术科学] TM282[一般工业技术—材料科学与工程]