Fatigue Crack Inspection and Acoustic Emission Characteristics of Precast RC Beam under Repetition Loading

Abstract:

Fatigue crack of the precast reinforced concrete beam under repetition loading is vital to be examined. Reinforced concrete structures exposed to excessive repetition loading could lead to the failure of the structures. In order to examine the active fatigue crack, the reinforced concrete beams were subjected to three-point repetition maximum loading. Eight phases of maximum fatigue loading with sinusoidal wave, frequency of 1 Hz and 5000 cycles for each phase were performed on the reinforced concrete beams. The inspection was carried out with visual observation of the crack pattern and acoustic emission technique for each load phase. The signal strength of acoustic emission was investigated. It is found that the signal strength of acoustic emission and crack pattern of the reinforced concrete beam subjected to repetition loadings showed promising results for structural health monitoring.

• Periodical: Applied Mechanics and Materials (Volumes 773-774)
• Pages: 1022-1026
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.773-774.1022
• Online since: July 2015
• Authors: Md Nor Noorsuhada*, Ibrahim Azmi, Muhamad Bunnori Norazura, Mohd Saman Hamidah, Mat Saliah Soffian Noor, Shahidan Shahiron
• Keywords: Acoustic Emission, Fatigue Crack, Repetition Loading, Signal Strength

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