Issue 42

W. De Corte et alii, Frattura ed Integrità Strutturale, 42 (2017) 147-160; DOI: 10.3221/IGF-ESIS.42.16

(a) (b) Figure 14 : Debonded surfaces specimen 2-S-C: steel side (a) and concrete side (b) .

F m

τ m

s m

Test specimen

[kN]

[MPa]

[mm]

0-0-0 1-S-0

115 (21) 222 (45) 214 (44) 227 (29) 177 (49) 207 (53) 353 (85)

1.51 (0.28) 2.92 (0.59) 2.82 (0.57) 2.99 (0.38) 2.33 (0.64) 2.73 (0.70) 4.65 (1.12)

0.02 (0.01) 0.05 (0.03) 0.01 (0.01) 0.01 (0.01) 0.02 (0.01) 0.02 (0.02)

1-R-V-a 1-R-H-a 1-R-V-b 1-R-H-b

2-S-c 0.03 (0.01) Table 3 : Results (mean value and STDEV) of push-out tests.

6,00

3,00

[MPa]

1,51 2,92 2,82 2,99 2,33 2,73 4,65

0,00

Mean shear bond stress

Figure 15 : Results of push-out tests (graphical representation).

Tab. 3 and Fig. 15 summarize the mean values and standard deviations (STDEV) of the failure load F , the shear bond stress τ n , and the according maximum relative slip s m for the different push-out specimens. In this, the average shear bond stress is given by Eq. 7.

F

F

n A   

[N/mm 2 ]

(7)

2 200 190  

From the values of Tab. 3 and Fig. 15 it can be concluded that the application of an epoxy adhesive layer improves the shear bond strength between steel plates and concrete. In addition, that test specimens 1-S-0 show a mean bond strength similar

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