Reinforcing method of concrete structure beam column nodes

Abstract

The invention relates to a reinforcing method of concrete structure beam column nodes, in particular to a method aiming at reinforcing beam column nodes in which both space structure and stress are complex. The reinforcing method of the concrete structure beam column nodes comprises the following steps: chopped fiber, concrete and water are mixed and stirred into a mixture and accelerator is added on a nozzle of an injection machine and injected to the beam column nodes. Alternatively, the reinforcing method of the concrete structure beam column nodes can comprise the following steps: chopped fiber reinforce plastic (FRP) fiber, epoxy resin and additive are mixed and stirred into a mixture and the mixture is injected to the beam column nodes by the injection machine to reinforce the nodes. The reinforcing method of the concrete structure beam column nodes can reinforce the beam column nodes which is complex in space structure without being affected by shape and scale of construction elements; intensity of an injection layer is high, and toughness is good; rebound rate of dry materials in the construction process is low, construction time is greatly shortened, loss of the dry materials is reduced, and environment is not polluted; no external template is needed to arrange in construction, anchorage and erecting reinforcement fabric is not needed, massive materials are saved, a template arranging procedure is removed, and construction is convenient, simple and rapid. The reinforcing method of the concrete structure beam column nodes can be applied not only to reinforcing beam column nodes but also to rapid repairing after an earthquake.

Description

technical field [0001] The invention relates to a reinforcement method for beam-column joints of concrete structures, in particular to a reinforcement method for beam-column joints with complex spatial structures and stresses. Belongs to the field of civil engineering. Background technique [0002] At present, the reinforced concrete frame structure is the most widely used structural form, and it is also the most widely used seismic structural form in earthquake areas. Improper design, harsh environment, change of use and other reasons will cause insufficient bearing capacity and rigidity of structural components and need to be repaired and strengthened. At the same time, when the frame structure in the earthquake zone is damaged by the earthquake force, it also needs to be repaired and strengthened. Among them, the failure of beam-column joints is an important aspect. Beam-column joints include the joint core area where frame beams and frame columns intersect and the bea...

AI Technical Summary

Problems solved by technology

However, due to its own technological characteristics, it will produce a certain amount of springback during construction, causing loss and polluting the environment.

From the point of view of structure, shotcrete often cannot reach the uniform compactness of well-vibrated concrete when it is formed, and the particularity of the raw material mix ratio required by shotcrete and the quality of shotcrete construction are not easy to control compared with ordinary concrete construction. , resulting in some physical and chemical properties (mainly mechanical strength, impermeability, durability, etc.) of shotcrete showing quality instability, especially the lack and weakening of crack resistance

[0007] The prestressed reinforcement method is a method of reinforcing the component with prestressed tie rods or steel strands outside the component, which can improve the bearing capacity of the component and reduce the control section of the original component without affecting the building space. However, when there are corrosive media, high temperature, and open flames in the use environment, special attention should be paid to protection, and it is not convenient for construction, and anchoring is difficult

[0008] In addition, the compressive strength of materials reinforced by traditional reinforcement methods is high, but the tensile strength is low, which affects the reinforcement effect; the improvement of shear strength and impermeability of beam-column joints by traditional reinforcement methods is not very significant

Especially for beam-column joints with two-way intersecting columns and beams, the effect of traditional reinforcement methods is not obvious, and the construction is more difficult.

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