Ultrasonic guided waves for monitoring incipient corrosion in reinforced concrete with top-bar defect

Article Engineering, Mechanical

Corrosion monitoring in steel bars using Laser ultrasonic guided waves and advanced signal processing

Subhra Majhi et al.

Summary: This paper presents an investigation using high power Laser ultrasonic guided waves combined with advanced signal processing to discern corrosion in structural steel bars, highlighting the pros and cons of Laser ultrasonic monitoring compared to traditional piezoelectric systems.

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2021)

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Article Construction & Building Technology

Detection of Top-Bar Effect in Reinforced Concrete Using Guided Ultrasonic Waves

Yikuan Wang et al.

Summary: This study proposed a nondestructive method using ultrasonic shear waves to detect steel-concrete interface debonding caused by the top-bar effect. Experiments were conducted by casting horizontal reinforcements at different heights in a concrete wall to create interfacial defects underneath the top bars, and the results showed that the signal amplitude increased with the height of the bars. Utilizing the increasing difference between the high-frequency component and the excitation frequency of the signal could be a way to monitor the top-bar effect nondestructively.

JOURNAL OF STRUCTURAL ENGINEERING (2021)

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Review Construction & Building Technology