Issue 69

M. B. Prince et alii, Frattura ed Integrità Strutturale, 69 (2024) 154-180; DOI: 10.3221/IGF-ESIS.69.12

D ESCRIPTION OF REFERENCE SPECIMENS

T

hree reference specimens from Deng et al. [21] have been selected to validate the proposed finite element modeling strategy with the experimental data. These specimens contain both plain concrete and engineered cementitious composite. Another specimen from Tang and Cheng [12] has been selected to check the performance of the proposed FEM strategy of concrete with confinement. The testing procedure for all reference specimens was almost the same. A universal testing machine provided the pullout load at a specific displacement-controlled rate. Schematic diagrams of the reference specimens are shown in Fig. 1(a)-(b). In the reference experimental program, Eqns. (1)-(2) were used to calculate the bond stress and slip of bonded concrete and reinforcement. The material properties and dimensions of the selected specimens are shown in Tab. 2.

F

(1)

τ =

π dl

a

l f s +s

s=

(2)

2

where, τ is the bond stress, s is the slip, F is the applied load, d is the bar diameter, l a is the bonded length, s l and s f are the slips at the loaded end and the free end, respectively.

(a) (b) Figure 1: Schematic diagram of reference specimens (a) E1R16, C1R20, E1R16-60 [21] (b) C20#8 [12] (the variable L and d B can be found in Tab. 2).

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