Damage assessment of the in-service brick masonry structure using acoustic emission technique

Most of the current researches on masonry damage assessment are qualitative rather than quantitative analysis. In this work, two acoustic emission (AE) rate process mathematical models were used to analyze the AE data during the in situ uniaxial compression test. The results showed that there was a linear correlation between AE cumulative events and the damage parameter, and the mathematical model proposed by S. T. Dai was suitable for analyzing the microcrack evolution of brick masonry material. Furthermore, the comparison of the fourth-order polynomial function and the Dai model with respect to the proportional coefficient k further demonstrated the applicability of the Dai model in damage assessment of in-service brick masonry structures.