Issue 60

N. Hassani et alii, Frattura ed Integrità Strutturale, 60 (2022) 363-379; DOI: 10.3221/IGF-ESIS.60.25

that with the increasing of the number of aging cycles, the load-displacement curves are gradually more inclined. This indicates that material stiffness gradually decreases. As a result, for the same value of load there is a larger value of displacement.

a) Longitudinal measurements

b) Transversal measurements

c) Semi-direct measurements Figure 11: Damage time evolution according to exposure conditions for specimen loaded with 70% of the design strength Rd;

From the 1 st cycle…… to the22 nd cycle

Figure 12: Load-Displacement curve of concrete specimen loaded with 70% of the design strength Rd.

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