应用超声波技术进行混凝土结构健康监测研究

摘要

The structure Health Monitoring (SHM) of the concrete structures can detect the deterioration before the fatal failure occurs.The main aim of SHM is to evaluate the existing structure to give advice for engineers to take actions to repair the deteriorated members.Many literature have simulated proper models to analyze the crack of concrete and the corrosion of stainless steel which is embedded in concrete.Also some experiments have been made to verify the robustness of the certain approaches to evaluate the Reinforced Concrete(RC) structure.However,in order to improve the accuracy and efficiency of the detection,methods must be investigated further.Proper ultrasonic waves are selected in the frequency domain.In this review,the advantages and the disadvantages,the applications of conventional detection methods are discussed by summarizing literature.Finally,this paper proposed some advice for the future research in detecting reinforced concrete structures with means of ultrasonic guided waves.%混凝土结构的健康监测可以在结构失效之前及时诊断结构损伤,并根据结构损伤具体状况向工程人员提出修复意见,避免人员伤亡和经济损失.很多重要的文献已经对混凝土结构中裂缝、钢筋锈蚀等问题进行数值分析、理论分析和实验研究,得到了很多规律性的结论,对工程应用具有一定的参考价值.但对大尺度的混凝土结构和精确度要求高的关键部位的结构损伤诊断还有待改进.其中利用特定频率域的超声波信号,对大型混凝土结构的关键部位进行健康检测,是混凝土结构健康监测的主要发展趋势.对超声波检测混凝土结构的检测方法、优点和不足、应用范围、使用情况等进行文献调研总结,为以后相关课题研究提供建议.