Monitoring Damage in PC Slabs by Modal and Ultrasonic Tests

Authors

  • Sitthinon Kaewsawang Kasetsart University
  • Wacharaphon Chaisiriniran Kasetsart University
  • Poohrid Kaewngam Kasetsart University
  • Piya Chotickai Kasetsart University

DOI:

https://doi.org/10.4186/ej.2023.27.2.17

Keywords:

damage detection, damping, natural frequency, nondestructive test, prestressed concrete, ultrasonic, pulse velocity

Abstract

The effectiveness of modal and ultrasonic tests for monitoring the damage in precast prestressed concrete slabs was experimentally investigated. Four slabs with two different span lengths and corresponding modes of failure (interfacial shear and flexural failures) were subjected to loading steps until failure. The variations in fundamental natural frequency, damping ratio, ultrasonic pulse velocity (UPV), and ultrasonic wave attenuation in relation to the damage severity and failure mode were investigated and compared. It was observed that the natural frequency was sensitive to flexural crack development. A significant change in the damping ratio was obtained in the slabs with moderate damage. The UPV was not affected by a moderate degree of interfacial shear damage and a low degree of flexural damage; however, it was strongly related to the progression of flexural damage at the severe stage. Among the various indexes, ultrasonic wave attenuation was most sensitive to the development of damage. The method could detect interfacial-shear and flexural cracks at an early stage.

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Author Biographies

Sitthinon Kaewsawang
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Department of Civil Engineering, Kasetsart University, 50 Ngam Wong Wan Rd., Lat Yao, Chatuchak, Bangkok, 10900, Thailand

Wacharaphon Chaisiriniran
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Department of Civil Engineering, Kasetsart University, 50 Ngam Wong Wan Rd., Lat Yao, Chatuchak, Bangkok, 10900, Thailand

Poohrid Kaewngam
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Department of Civil Engineering, Kasetsart University, 50 Ngam Wong Wan Rd., Lat Yao, Chatuchak, Bangkok, 10900, Thailand

Piya Chotickai
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Department of Civil Engineering, Kasetsart University, 50 Ngam Wong Wan Rd., Lat Yao, Chatuchak, Bangkok, 10900, Thailand

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Published In
Vol 27 No 2, Feb 28, 2023
How to Cite
[1]
S. Kaewsawang, W. Chaisiriniran, P. Kaewngam, and P. Chotickai, “Monitoring Damage in PC Slabs by Modal and Ultrasonic Tests”, Eng. J., vol. 27, no. 2, pp. 17-27, Feb. 2023.
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