Device for reinforcing concrete beam slab by pretension carbon fiber plate and construction method

Abstract

The invention discloses a device for reinforcing a concrete beam slab by a pretension carbon fiber plate and a construction method, and is characterized in that: a fixed end rabbet and a tension end rabbet are formed on two ends, which are close to the end positions, on the bottom surface of the concrete beam slab respectively; a fixed end anchor device and a tension end base steel plate are fixedly arranged in the fixed end rabbet and tension end rabbet respectively through bolts; a tension end fixing anchor device, a jacking bracket and a tension clamp are arranged on the tension end base steel plate along the carbon fiber plate; the tension clamp is movable on the tension end base steel plate in the tension direction; the jacking bracket is pressed against the tension clamp in the tension direction of the carbon fiber plate; the fixed end of the carbon fiber plate is clamped in the fixed end anchor device; and the carbon fiber plate passes through a tension end anchor device and the jacking bracket and is clamped in the tension clamp. The invention can effectively reduce the construction period.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a device and a construction method for reinforcing concrete beam slabs by pretensioning carbon fiber slabs. Background technique [0002] In order to reinforce the concrete flexural members of the old building, to eliminate potential safety hazards and prolong the service life, the existing technology is to paste carbon fiber sheets with high strength and small self-weight on the tensile surface of concrete beams and slabs. In order to improve the strength of the carbon fiber sheet, it is necessary to pre-tension the sheet to reinforce the concrete beam and slab with the prestressed carbon fiber sheet, which can effectively improve the flexural bearing capacity and stiffness of the component. Among the various pre-tensioning methods at present, the beam-on-beam tensioning method requires less equipment and is light, but the existing several types of equipment are either too l...

Images