Reinforcing system and method for T-beam web

Abstract

The invention discloses a reinforcing system and method for a T-beam web. The reinforcing system comprises a plurality of reinforcing units arranged on the T-beam web side by side; each reinforcing unit comprises a tensioning belt, an anchorage device, a base plate and a prestress maintaining mechanism; the two ends of the tensioning belts are fixed to the upper ends of the two side faces of the T-beam web through anchorage devices correspondingly; the base plates are used for being bonded to the position, needing to be reinforced, of the bottom face of the T-beam web, and tensioning belts sleeve the section, corresponding to the bottom face of the T-beam web, of a toggling plate; and the toggling plate is connected with bolts through threaded holes, screw rods of the bolts extend out of the threaded holes and abut against the base plates, so that the base plates are extruded by tightening the bolts, the counter-acting force of the base plates is obtained, and the tensioning belts are stretched and tightened on the toggling plate, so that the tensioning belts generate and maintain a pre-stress state. Pre-pressure can be actively applied, existing cracks can be closed or reduced, prestress can be supplemented through the adjusting bolts in the later period, and the reinforcing system has the advantages of active bearing, easy operation, high reinforcing efficiency and the like.

Description

technical field [0001] The invention relates to the technical field of engineering structure reinforcement. Background technique [0002] The use of fiber reinforced composite materials (Fiber Reinforced Polymer, referred to as FRP) to strengthen concrete structures is currently the most commonly used reinforcement method for concrete structures; in the prior art, FRP embedded anchoring method is usually used when FRP materials are used for shear reinforcement of concrete structures , Hybrid anchoring method, mechanical pipe groove anchoring method, U-shaped hoop. Existing studies have shown that the peeling between FRP material and concrete is the primary factor affecting the effect of FRP reinforcement; the construction process of embedded anchoring method and mechanical pipe groove anchoring method is more likely to cause damage to the lower part of the bridge body. The hybrid anchoring method is suitable for temporary anchoring, but it cannot prevent local stripping dam...

AI Technical Summary

Problems solved by technology

Existing studies have shown that the peeling between FRP material and concrete is the primary factor affecting the effect of FRP reinforcement; the construction process of embedded anchoring method and mechanical pipe groove anchoring method is more likely to cause damage to the lower part of the bridge body

The hybrid anchoring method is suitable for temporary anchoring, but it cannot prevent local stripping damage

The construction of the U-shaped hoop is simple, but it has problems such as early peeling damage, and the traditional anchoring method cannot solve the stress hysteresis of the FRP cloth (the stress of the FRP cloth will only be caused after the deformation of the reinforced structure), the crack suppression effect is not good, and the reinforcement Material strength can not be fully utilized and other issues

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