| 摘要: |
| 为有效监测钢筋混凝土结构内部钢筋的锈蚀,提出了基于压电陶瓷(PZT)波传播法的钢筋锈蚀监测方法.首先,基于PZT波传播法对变形钢筋进行了试验研究及数值模拟,找出了应力波在无锈蚀钢筋中的传播衰减规律；然后,设计制作了18个钢筋混凝土试件,在埋入每个试件中的钢筋表面相同位置粘贴PZT激励器/传感器；最后,对试件进行电化学快速锈蚀,并在试件锈蚀过程中,对其进行PZT测试,来追踪锈蚀对应力波传播特性的影响.结果表明:钢筋锈蚀严重影响应力波的传播衰减规律,传感器接收到的信号幅值与钢筋锈蚀率之间呈二次函数的关系. |
| 关键词: 监测 压电陶瓷(PZT) 波传播法 钢筋锈蚀 |
| DOI：103969/j.issn1007 9629201601028 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51178305）；天津市应用基础与前沿技术研究计划项目（14JCYBJC21500） |
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| Monitoring Method for Corrosion of Reinforcement in Concrete Based on Wave Propagation Method with PZT |
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ZHU Jinsong, GAO Zhiyu
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School of Civil Engineering, Tianjin University, Tianjin 300072, China
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| Abstract: |
| In order to monitor the corrosion of reinforcement in reinforced concrete structures, a monitoring method based on wave propagation method with piezoelectric ceramic(PZT) was proposed. Firstly, based on PZT wave propagation, experiments and numerical simulation were conducted to investigate and identify the stress wave propagation attenuation law in absence of the corrosion of reinforcement. Secondly, eighteen reinforced concrete specimens were prepared, and PZT actuators/sensors were attached at the same position on the surface of each embedded reinforcement. Finally, fast electrochemical corrosion was applied to these specimens, and the PZT test was carried out to enable the specimen corrosion process to trace the influence of corrosion on the wave propagation characteristics. The results show that the corrosion of reinforcement affects the stress wave propagation attenuation law seriously, and it shows a quadratic function between the amplitude of the wave propagation and the corrosion rate of reinforcement. |
| Key words: monitor piezoelectric ceramic(PZT) wave propagation method corrosion of reinforcement |
