Reinforcing method and structure for improving axial compression performance of concrete column

Abstract

The invention provides a reinforcing method and structure for improving the axial compression performance of a concrete column. The method comprises the following steps: conducting on-site lofting; treating the surface of a concrete member, and removing a plaster layer cushion layer or other decoration surface layers; polishing a loose layer and greasy dirt on the surface of the concrete member until a new concrete interface is completely exposed, cleaning floating ash on the surface, and keeping the surface dry and flat; if a segment difference or corner part exists, plastering a smooth curve; conducting rust removal and roughening treatment on the bonding faces of U-shaped hoop plates; after calibration, conducting butt welding on two U-shaped hoop plate units, and forming an annular hoop plate on the outer side of the concrete member; sealing each annular hoop plate area, and pouring modified epoxy resin slurry; and finally, conducting curing at normal temperature. The axial compression performance of the concrete column can be well improved, construction is easy and convenient, the technical requirement is low, economical efficiency and applicability are high, and meanwhile, the deformability and durability of the concrete member can be effectively improved.

Description

【Technical field】 [0001] The invention relates to the field of building reinforcement engineering, in particular to a reinforcement method and structure for improving the axial compression performance of concrete columns. 【Background technique】 [0002] Concrete structure is a structural form that is widely used. Part of the concrete structure is cracked or even damaged due to various uncertain factors during use, such as improper construction or insufficient design considerations; occurrences such as floods, wind disasters and earthquakes, etc. catastrophic event. In addition, with the long-term service of the structure, the mechanical performance of the concrete material will gradually decrease during use, and deterioration and damage will occur. When it continues to be used beyond the design service life, its reliability will be difficult to meet the requirements of structural safety. Therefore, it is very important to take reasonable and reliable reinforcement measures ...

AI Technical Summary

Problems solved by technology

Enlarged section reinforcement method can indirectly improve the axial compression performance of concrete columns. Its process is simple, it has mature design and construction experience, the reinforcement cost is low, and it can effectively improve the bearing capacity and stiffness of components. Long, takes up a lot of building space, will increase the weight of the structure, and at the same time affect the use and appearance of the building

The axial compression performance of column concrete is improved by the method of hoop-adhesive carbon fiber composite reinforcement, and the column needs to be arc-shaped before reinforcement, which has poor applicability.

The external steel reinforcement method is widely applicable to concrete beam-column members, which can effectively improve the bearing capacity and stiffness of the members without increasing the cross-sectional size of the members, but this method consumes a large amount of steel, the cost of reinforcement is high, and the economy is poor , and the calculation method for improving the axial compression performance is not given in the specification

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