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Evaluation of Fatigue Damage of Concrete using Impact Echo Method

Char Ai, Tan (2004) Evaluation of Fatigue Damage of Concrete using Impact Echo Method. Universiti Teknologi Petronas. (Unpublished)

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Abstract

The impact echo technique is traditionally used to determine position of defects within concrete structures. Impact echo technique is non-destructive, non-intrusive, and cost and time efficient. In this paper, application of impact echo in assessing crack development n concrete structures subjected to cyclic load is discussed. Research work is carried out by performing impact echo test on concrete plain beam 150mm x 150mm x 750mm subjected to cyclic load. Mechanical stress wave is generated by striking the concrete surface with 7mm diameter steel ball. The reflected stress wave is then detected by accelerometer and displayed result in the form of amplitude-frequency waveform on the screen of an oscilloscope. The waveform recorded at certain interval of cyclic loading is analysed to estimate the crack development in concrete. It is found that impact echo result has a strong correlation with the concrete fatigue life. There is also a great potential of using Impact echo method to predict the remaining service life of a concrete structure subjected to cyclic load. However many parameters can affect the accuracy of impact echo result, more research need to be done and many conditions need to be taken into consideration when implementing this method in predicting the remaining service life of concrete structure.

Item Type: Final Year Project
Academic Subject : Academic Department - Civil Engineering - Structures, materials and construction
Subject: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Engineering > Civil
Depositing User: Users 2053 not found.
Date Deposited: 30 Sep 2013 16:55
Last Modified: 25 Jan 2017 09:46
URI: http://utpedia.utp.edu.my/id/eprint/7848

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