Method for carrying out shear-resistant reinforcement on beam with floor slab

Abstract

The invention belongs to the technical field of seismic reinforcement and discloses a method for carrying out shear-resistant reinforcement on a beam with a floor slab. The beam with the floor slab comprises a beam, a wall or a column arranged at the end of the beam and the floor slab vertically connected with the beam, the wall or the column. The composite mortar reinforced by CFRP net is used for reinforcing a connecting beam section of the beam with the floor slab which is easy to be sheared and damaged. The CFRP net U-shaped surrounding beam web plate is used, CFRP net lines vertical to the axis of the connecting beam cooperate with original beam stirrups to bear seismic shearing force, CFRP net lines parallel to the axis of the connecting beam play a role in "forming a net" or 'distributing ribs', so that shearing-resistant net lines are stressed more uniformly, steel plates and bolts embedded in the upper end of the beam web plate can firmly fix the shearing-resistant CFRP net, the composite mortar cooperates with concrete to resist shearing, and the CFRP net U-shaped surrounding beam web plate plays a role in resisting compression shearing, bonding, protecting, slope findingand filling and repairing on concrete cracks, and a high-performance cement composite mortar reinforcing layer reinforced by the CFRP net can effectively guarantee the shearing-resistant bearing capacity of a reinforced beam.

Description

technical field [0001] The invention relates to the field of anti-seismic reinforcement, in particular to a method for performing shear reinforcement on beams with floor slabs. Background technique [0002] Coupling beams in the reinforced concrete short-limb shear wall structure system designed according to my country's existing codes, frame beams in the cast-in-place frame structure system, independent simply supported beams, and reinforced concrete bridges, such with slabs or flanges Beams, due to the influence of design and construction or other factors, may cause insufficient shear stirrups, and are prone to shear failure under horizontal earthquake or wind loads, such as figure 1 shown. [0003] For reinforced concrete beams with slabs or flanges, since the slabs or flanges are integrally cast in-situ with the web, the shear reinforcement layer can only be arranged in the web area, and the reinforcement layer cannot be made into a " Closed enclosure”, the anti-strippi...

AI Technical Summary

Problems solved by technology

[0004] The traditional shear reinforcement methods of reinforced concrete beams mostly use carbon fiber cloth, carbon fiber plate, steel plate or section steel as the reinforcement layer. Structural adhesives are not resistant to high temperatures and are prone to aging. Inconsistency with inorganic concrete due to their material properties can easily lead to incompatibility on the bonding interface, so that the reliability and durability of reinforcement cannot be guaranteed, and the process is complicated, and the construction quality is not easy to guarantee

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