Reinforcement method and structure for improving post-installed anchorage shear bearing capacity of concrete beam

Abstract

The invention discloses a reinforcement method and a structure for improving the post-anchor shear bearing capacity of concrete beams, comprising the following steps: connecting and fixing post-anchor steel beams with concrete beams; making installation holes at floor positions on both sides of the concrete beams; The screw goes through the installation hole of the floor; the steel plate is attached to the bottom of the concrete beam; the steel plate and the concrete beam are fixed by chemical anchor bolts; the U-shaped hoop plate is sleeved on the concrete beam from the lower part of the concrete beam; the screw is connected to the top hoop set on the top of the floor The two sides of the plate and the U-shaped hoop plate are welded; the U-shaped hoop plate and the steel plate at the bottom of the concrete beam are welded and fixed at the bottom of the concrete beam; the invention improves the shear bearing capacity at the anchorage position of the concrete beam and is no longer limited The cross-sectional size and concrete strength of the original structure concrete beams; increase the construction flexibility, avoid the wedge-shaped shear damage of the concrete edge, and effectively avoid the wedge-shaped shear damage of the concrete edge.

Description

technical field [0001] The invention belongs to the field of construction engineering, and in particular relates to a reinforcement method for improving the post-anchored shear bearing capacity of concrete beams. Background technique [0002] Post-anchoring technology is the anchoring of existing concrete structures through related technical means, such as anchor bolt self-locking or chemical bonding. Due to its advantages of convenient construction and flexible layout, post-anchor technology is more and more widely used in house reinforcement and reconstruction. The factors affecting the post-anchored shear bearing capacity mainly include anchor bolt strength, anchorage depth, concrete substrate strength, anchor bolt quantity and arrangement, etc. The shear failure modes of anchor bolts mainly include steel shear failure and concrete failure, wedge-shaped shear failure of concrete edge and concrete shear pry failure. Due to the limited height of the concrete beam and the ...

AI Technical Summary

Problems solved by technology

[0003] 1. The shear bearing capacity is low, limited by the size of the original structural concrete beam section and the strength of the concrete

[0004] 2. This kind of shear failure is brittle failure, not ductile failure

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