PSI - Issue 44

Paolo Zampieri et al. / Procedia Structural Integrity 44 (2023) 926–933 Zampieri et al./ Structural Integrity Procedia 00 (2022) 000–000

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Fig. 4. Measurements layout, Front B.

Eight strain gauges (SG) were used in the strengthened arch, in addition to the instrumentation described, suited in the reinforcement grid for measuring the local deformation in the center of the CFRCM strip. 4. Tests results 4.1. Unstrengthened arch (U1)

Fig. 5. Deformed shape of the unstrengthened arch.

The experimental test performed on the unstrengthened arch exhibits a peak load of 32 kN. The main collapse mechanism referred to the load peak occurs with the formation of 4 cracking hinges. In the post-peak phase, the mechanism remains the same until the vertical displacement imposed by the actuator reaches the value of 5 mm. After this point, the mechanism evolves into a 3 cracking hinges and a joint shear-sliding failure. The shear-sliding failure