PSI - Issue 2_B

F.J Gómez et al. / Procedia Structural Integrity 2 (2016) 2841–2848 Gómez, Martín-Rengel, Ruiz-Hervías, Fathy and Berto/ Structural Integrity Procedia 00 (2016) 000–000

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2. Experimental data Experimental results of three point bending fracture tests have been taken from the literature in order to validate the proposed methodology (Fathy et al 2008). The experiments include two different concretes with design resistance of 25 and 40 MPa. The load vs. displacement data are shown in Fig 1 and the experimental device in Fig 2.

5000

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(a

(b

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P (N)

P (N)

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0 0.2 0.4 0.6 0.8 1 1.2 1.4

0 0.2 0.4 0.6 0.8 1 1.2 1.4

CMOD (mm)

CMOD (mm)

Fig. 1. Experimental load-CMOD curves: (a) Concrete 1; (b) Concrete 2.

Fig. 2. Three point bending experimental device

The three-point bending tests were stable until the end of the test. There exists an initial linear part followed by a maximum load and a load decay until almost zero value. This is produced by a stable crack propagation in the symmetry plane of the specimen. From the experimental results the bilinear softening curve parameters were obtained following the procedure described in (Fathy et al 2008). The results appear in Table 1.