17 Figure 7. The continuous curves indicate the total load in the DEM models, while the bars show the amplitudes of AE events. Both axis were normalized to the maximum value. (a) Uniaxial compression test, (b) Three points bending test. Figure 8. Histograms of the number of AE events and evolution with time of the accumulated number of AE events (thich line) and loas evolution (thin line) for: (a) Uniaxial compression test, (b) Three points bending test. 5. CONCLUSIONS In this work, two experimental tests carried out on concrete specimens loaded up to failure are analyzed. One was a prismatic specimen subjected to uniaxial compressive loading, the other was a pre-cracked beam subjected to the three point bending test. For both examples experimental and numerical results are presented. The numerical simulations were performed using a version of the truss-like Discrete Element Method (DEM). During the tests, the Acoustic Emission (AE) technique was used to monitor the damage process taking place in the specimens. The numerical and experimental results obtained in the two examples are compared, and their intrinsic differences are identified. (a) (b) (a) (b)
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