Issue 60

A.-A. A. A. Graf et al., Frattura ed Integrità Strutturale, 60 (2022) 310-330; DOI: 10.3221/IGF-ESIS.60.22

ESS, 262-2/2015, and ISO 6935-2/2007, were done for the reinforcement steel bars as shown in Fig. 4. For each diameter, three samples were tested. The average results for main reinforcement steel and stirrup bars are given in Tab. 2.

% Maximum of elongation

Steel/Property.

Yield strength, MPa Tensile strength, MPa

Main steel, Grade 550

550 240

700 350

15

Confinement steel, Grade 240

25 Table 2: Tension test results for main reinforcement steel and stirrup bars.

(a) Control Beam

(b) CFRPs confinement in compression zone

(c) Steel fiber 1.0% V f in compression zone Figure 1: Experimental specimen schematics and dimensions; (a) control beams, (b) CFRPs confinement in compression zone and (c) steel fiber 1.0% V f in compression zone .

Figure 2: Cross section dimensions and steel bars distribution for control beams; C1, C2, C3, and C4 .

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