School of Traffic Engineering, Shenyang Jianzhu University, Shenyang 110168, Liaoning, China.
Sensors (Basel). 2018 Dec 7;18(12):4312. doi: 10.3390/s18124312.
With the rapid development of the world's transportation infrastructure, many long-span bridges were constructed in recent years, especially in China. However, these bridges are easily subjected to various damages due to dynamic loads (such as wind-, earthquake-, and vehicle-induced vibration) or environmental factors (such as corrosion). Therefore, structural health monitoring (SHM) is vital to guarantee the safety of bridges in their service lives. With its wide frequency response range, fast response, simple preparation process, ease of processing, low cost, and other advantages, the piezoelectric transducer is commonly employed for the SHM of bridges. This paper summarizes the application of piezoelectric materials for the SHM of bridges, including the monitoring of the concrete strength, bolt looseness, steel corrosion, and grouting density. For each problem, the application of piezoelectric materials in different research methods is described. The related data processing methods for four types of bridge detection are briefly summarized, and the principles of each method in practical application are listed. Finally, issues to be studied when using piezoelectric materials for monitoring are discussed, and future application prospects and development directions are presented.
随着世界交通基础设施的快速发展，近年来建造了许多大跨度桥梁，尤其是在中国。然而，由于动态荷载（如风、地震和车辆引起的振动）或环境因素（如腐蚀），这些桥梁很容易受到各种损坏。因此，结构健康监测（SHM）对于保证桥梁在使用寿命期间的安全性至关重要。由于压电换能器具有宽频率响应范围、快速响应、简单的制备过程、易于处理、低成本等优点，因此常用于桥梁的 SHM。本文总结了压电材料在桥梁 SHM 中的应用，包括混凝土强度、螺栓松动、钢腐蚀和灌浆密度的监测。对于每个问题，描述了压电材料在不同研究方法中的应用。简要总结了四种类型桥梁检测的相关数据处理方法，并列出了每种方法在实际应用中的原理。最后，讨论了使用压电材料进行监测时需要研究的问题，并提出了未来的应用前景和发展方向。
