PSI - Issue 62

Francesco Bencardino et al. / Procedia Structural Integrity 62 (2024) 972–982 Bencardino/ Structural Integrity Procedia 00 (2019) 000 – 000

979

8

longitudinal axis of the beam. The arrangement of the reinforcement around the section toke place in a U-shaped scheme. In order to achieve a safety factor = 1.08 corresponding to a resistant shear of 656.5 kN, a first ply of carbon fabric needed to by applied in 45°-orientation at the ends of the beam in addition to a second one with 90°-orientation. The latter was adopted also for the rest of the beam. Moreover, 1 ply 90°-orientation was necessary along the entire span of the edge ’ s beams, plus a further one at the ends where the shear action was maximized. TRAVE INTERNA: Rinforzo a Flessione Applicare in sequenza:

N. 3 lamine affiancate di lunghezza 7,50 m(1° strato) N. 3 lamine affiancate di lunghezza 5,00 m (2° strato)

1° strato: N 3 affiancate Kimitech Plate 120x1,4 1 st ply of CFRP-plates

2° strato: N 3 affiancate Kimitech Plate 120x1,4 2 nd ply of CFRP-plates

4075

5000

4075

2825

7500

2825

13150 mm

Fig. 7. Sketch of the bending strengthening with CFRP-plates (dimensions in mm).

Internal beam: shear strengthening CFRP-installation order: A , B , C The A-configuration is a “ U ” -shape achieved by coupling two “ L ” from both sides

a)

Edge beam: shear strengthening CFRP-installation order: B , C

b) Fig. 8. Sketch of the shear strengthening with CFRP-sheets: a) internal and b) edge beam (dimensions in mm).