Issue 49

E.U.L. Palechor et alii, Frattura ed Integrità Strutturale, 49 (2019) 614-629; DOI: 10.3221/IGF-ESIS.49.56 617 (a) Perspective view of damage positions – Case-1. (b) Lateral view of damages positions –Case-1. Figure 3 : Geometry and position of damages for the beam with 5m span. (a) Perspective view of damage positions –Case-2. (b) Lateral view of damages positions – Case-2. Figure 4 : Geometry and location of damages for the beam with 6m span. The two proposed cases in this paper correspond to beams with different damage positions in beams with spans of 5 m and 6m. The simulated damages are notches symmetrical placed with respect to the steel beam web, and located in the upper and lower flanges of the beams. Case-1: Figs. 3 and 5 show this case, the numbers in Fig. 5 over the Beam-1 and outside it are, respectively, elements and nodes. The beam span is 5 m, Damage-1 is located at 1.5 m to the left support, between nodes 8 and 9. The notches are spaced every 2.5 cm. The position of the second damage, Damage-2 is a notch located at 4.5 m (between nodes 23 and 24) with respect to the same support (Fig. 5). The position of the two damage generated a decrease in the moment of inertia of the cross section (Ix) of 52.2% and 65.6%, respectively. Case-2: length of Beam-2 is 6m and the Damage-1 is located 5 m (nodes 26) from the left support, spaced every 2.5cm. Damage-2 is a notch located at 5.4 m (node 28) in relation to the same support (Fig. 6). The position of the two damage generated a decrease in the moment of inertia of the cross section (Ix) of 65.6%. Figure 5 : Damage positions in Case 1 .