Abstract
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.
Highlights
In recent years, with the rapid development of China’s transportation construction industry, many long-span bridges were built
Baptista et al experimentally studied the effect of temperature on the electrical impedance of the piezoelectric sensors used in the Electromechanical Impedance (EMI) technique, and the results showed that the temperature effects were strongly frequency-dependent [76]
With increasing attention dedicated to bridge monitoring, the application of piezoelectric materials is becoming increasingly extensive
Summary
With the rapid development of China’s transportation construction industry, many long-span bridges were built. With recent scientific and technological improvements at the industrial level, bridge construction technology experienced unprecedented progress [1]. Many bridges with a span of over 400 m were built in recent years, including 114 cable-stayed bridges and 109 suspension bridges. 59 cable-stayed bridges and 34 suspension bridges were built in China. More long-span cable-stayed and suspension bridges are under construction or planned for construction. Bridges may suffer from many defects, such as fatigue and brittle fracture, corrosion, instability, and mechanical damage. Bridge construction is extremely complicated and must be subject to strict monitoring. The stresses and displacements generated at the key sections and major control points of a structure are controlled within the scope of the design to ensure the safety and quality of construction
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