Strengthening of reinforced concrete beams under combined torsion and bending using carbon fiber reinforced polymer strips

Abstract EN

Externally bonded, CFRP sheets are currently being studied and applied around the world for the repair and strengthening of structural concrete members.

The experimental work includes investigation of four groups of beams.

The first group includes two beams tested under combined torsion and bending (when torsion prevails T / M > 1).

The second group includes two beams tested under pure torsion.

The third group includes two beams tested under combined torsion and bending (when bending prevails T / M < 1).

The fourth group includes two beams tested under pure bending.

Test results were discussed based on torque–twist behavior, bending moment-deflection, beam elongation, failure modes and influence of CFRP on ultimate torque, ultimate bending moment.