Fracture behavior of concrete–concrete interface using acoustic emission technique

Fracture Properties of Concrete–Concrete Interfaces Using Digital Image Correlation

“…Table 4 reports the values of mode I fracture toughness computed for different interfaces. The values obtained by using the RILEM method of Bazant [27] which is based on the size effect law of Bazant [28] are also shown in this table [29]. In addition, the values reported for different interfaces in [30] obtained using the compliance method are also shown.…”

A thermodynamic correlation between damage and fracture as applied to concrete fatigue

“…This constant holds good for different loading, geometry or material properties, as the model already takes into account the effect of these properties. In order to determine the effect of load ratio R on the dual of dissipation potential, we use the experimental results of Shah [16] in which notched three point bend concrete beams of three different sizes namely small, medium and large with depth equal to 76 mm, 152 mm and 304 mm, respectively were subjected to cyclic loading. In Shah's experiments [16], variable amplitude loading was used.…”

“…In order to determine the effect of load ratio R on the dual of dissipation potential, we use the experimental results of Shah [16] in which notched three point bend concrete beams of three different sizes namely small, medium and large with depth equal to 76 mm, 152 mm and 304 mm, respectively were subjected to cyclic loading. In Shah's experiments [16], variable amplitude loading was used. Starting from a P max equal to 500 N and P min equal to 200 N, the experiment was so programmed that after every 500 cycles of loading, P max was increased by 500 N, whereas P min remained at a constant value of 200 N until the end of the experiment.…”

“…Experimental results of Bažant and Xu [15] and Shah [16] are used to determine the unknown constants c 1 and c 2 through a calibration process. The rate of crack propagation as obtained from experiments is equated to rate of crack propagation of the proposed model given by Eq.…”

Monitoring Damage Using Acoustic Emission Source Location and Computational Geometry in Reinforced Concrete Beams

“…The width of the FPZ and damage zone are computed using load, displacement, AE events, and AE energy, and was found to be independent of the size. Additionally, as the difference in compressive strength of concrete on either side of interface increases, the load carrying capacity, number of AE events, AE energy, width of FPZ, and damage zone decrease [36].…”