Issue56

K. Fawzy et al, Frattura ed Integrità Strutturale, 56 (2021) 123-136; DOI: 10.3221/IGF-ESIS.56.10

Strengthening schemes

Beam No.

Type of strengthening

Control beam

B 00

B 01

One layer with length 1700 mm

two layers with length 1700 & 1400 mm

B 02

three layers with length 1700 & 1400 & 1100 mm

B 03

One layer and on sides above bottom edge by 20 mm with length 1700 mm

B 04

B 05

One layer and 6 U shapes

B 06

two layers and 6 U shape

B 07

Three layers and 6-U shape

One layer with length 1700 mm with lower longitudinal reinforcement 16 mm diameter One layer with length 1700 mm with lower longitudinal reinforcement 12 mm diameter

B 08

B 09

Table 4. Strengthening scheme.

Deflection and failure modes The mechanisms of failure can be categorized in global failure and local failure [13-15].  global failure involves compression failure of concrete in bending before or after yielding of steel, rupture of FRP layer in tension, and shear failure of concrete.

127