Issue 49

E.U.L. Palechor et alii, Frattura ed Integrità Strutturale, 49 (2019) 614-629; DOI: 10.3221/IGF-ESIS.49.56 616 Steel Beam -102 X 11,4 h (cm) h 0 (cm) t f (cm) t 0 (cm) c (cm) b (cm) Area (cm 2 ) I x (cm 4 ) E (MPa) 10.16 8.68 0.74 0.483 1.59 6.76 14.50 252 200 Table 1: Geometric and beam characteristics nominal values. (a) Additional Mass (b) Additional Mass (c) Steel plate to add mass. Figure 1 : Additional mass on the beam. The additional mass system allows the fixing of a different weights depending on the number of steel plates used. Additional masses are adequately positioned at nodes previously defined in the discretization. The steel plate must be tight to fixation avoid inappropriate movements and trepidations of the added masses that could influence the results. E XPERIMENTAL T ESTS C HARACTERISTICS Location of damages n the following beam specimens, induced damages simulate the effect of beam cross section deteriorations. It is known that fatigue or corrosion deteriorations are rough processes with resulting irregular loss of cross section. In the experimental tests, deteriorations are ideally thought of to be equivalent to damages caused by fatigue deterioration or corrosion of beams [8]. A set of one or more cracks is considered to be a damage. In practice, the simulated damage may be thought of as an equivalent deterioration of the steel beam cross section. Such damages were made with a circular saw of 3mm thick (Fig. 2). The depth and width of the cuts were made according to the damage cases set forth in Figs. 3 and 4. a) Circular saw b) Damage-1:Three-notches c) Damage-2:one-notch Figure 2 : Damage simulations, a) Circular saw, b) Damage-1, c) Damage-2. I