Issue 51

G. Ramaglia et alii, Frattura ed Integrità Strutturale, 51 (2020) 288-312; DOI: 10.3221/IGF-ESIS.51.23 307 ID specimen b [mm] d [mm] h [mm] Type of fiber [-] n l [-] t eq [mm] f mc [MPa] f m0 [MPa] f mc /f mc0 [-] S1 250 250 500 GFRP (type a) 1 0.48 19.29 13.71 1.407 S2 250 250 250 GFRP (type a) 1 0.48 26.23 13.98 1.876 S3 250 250 250 GFRP (type a) 1 0.48 21.21 13.98 1.518 S4 250 250 250 GFRP (type a) 2 0.96 35.18 13.98 2.517 S5 250 250 250 GFRP (type a) 2 0.96 30.52 13.98 2.184 S6 380 383 492 GFRP (type b) 1 0.23 12.03 8.3 1.426 S7 387 375 485 GFRP (type b) 1 0.23 12.79 8.3 1.518 S8 377 380 488 GFRP (type b) 1 0.23 14.15 8.3 1.678 S9 383 378 486 GFRP (type b) 2 0.46 14.52 8.43 1.723 S10 377 378 481 GFRP (type b) 2 0.46 16.01 8.43 1.899 S11 383 374 492 GFRP (type b) 2 0.46 12.64 8.43 1.499 S12 250 248 470 GFRP (type b) 1 0.23 17.65 11.12 1.588 S13 250 249 470 GFRP (type b) 1 0.23 16.27 11.12 1.463 S14 250 247 470 GFRP (type b) 1 0.23 15.94 11.12 1.434 S15 248 247 462 GFRP (type b) 2 0.46 19.10 11.12 1.718 S16 245 248 471 GFRP (type b) 2 0.46 20.57 11.12 1.850 S17 246 251 473 GFRP (type b) 2 0.46 21.45 11.12 1.929 Table 1.B : Geometrical characteristics and experimental results [33]. ID specimen k eff [-] f l,(eq.13) [MPa] f l,eff,(eq.13) [MPa] (f l,eff / f m0 ), (eq.13) [MPa] f l, (eq.18) [MPa] f l,eff, (eq.18) [MPa] (f l,eff / f m0 ), (eq.18) [MPa] S1 0.38 9.830 3.782 0.276 9.830 3.782 0.276 S2 0.38 9.830 3.782 0.271 9.830 3.782 0.271 S3 0.38 9.830 3.782 0.271 9.830 3.782 0.271 S4 0.38 19.661 7.565 0.541 19.661 7.565 0.541 S5 0.38 19.661 7.565 0.541 19.661 7.565 0.541 S6 0.42 1.922 0.799 0.095 1.929 0.802 0.095 S7 0.42 1.902 0.790 0.094 1.932 0.803 0.095 S8 0.42 1.937 0.806 0.096 1.945 0.809 0.096 S9 0.42 3.843 1.598 0.190 3.869 1.609 0.191 S10 0.42 3.894 1.622 0.192 3.899 1.624 0.193 S11 0.42 3.843 1.599 0.190 3.890 1.619 0.192 S12 0.46 2.944 1.342 0.121 2.956 1.347 0.121 S13 0.46 2.944 1.341 0.121 2.950 1.344 0.121 S14 0.46 2.944 1.342 0.121 2.962 1.350 0.121 S15 0.46 5.935 2.709 0.244 5.947 2.715 0.244 S16 0.46 5.935 2.712 0.244 5.972 2.728 0.245 S17 0.46 5.865 2.673 0.240 5.924 2.701 0.243 Table 2.B : Effective confining stress calculated according to Eqns. (13) and (18) for the experimental program, [33].