Influence of anchorage on the behavior of CFRP RC beams in flexure

الملخص EN

This research study involves experimental and theoretical investigations of the behavior of flexural debonding of carbon fiber reinforced polymer (CFRP) laminates with steel anchorages.

A total of nine reinforced concrete beam specimens with cross section of (150mm width by 250mm height and 2000mm length) were investigated in this study to observe the flexural strength of each one.

Eight beam specimens were strengthened with CFRP laminates and one beam specimen was tested without strengthening.

The experimental results showed that the use of CFRP strips as external strengthening has significant positive effect on ultimate loads, crack patterns and deflections.

The percent of increasing of the ultimate load capacity can be increased by about 65% when using two layers of CFRP strips instead of one layer.

The ultimate load is increased by about 118% for the beams strengthened with bonded CFRP and external anchorage with respect to the reference beam.

Three-dimensional nonlinear finite element analysis (i.e.

ANSYS - version 9.0 computer program ) is used to investigate the performance of reinforced concrete beams strengthened with CFRP.

The comparison between the numerical and the experimental results asserted that good validity of the numerical analysis and the methodology developed in this study.