Partial prefabricated reinforcing structure of existing H-shaped steel column and construction process thereof

Abstract

The invention discloses a partial prefabricated reinforcing structure of an existing H-shaped steel column. The structure comprises the existing H-shaped steel column, prefabricated concrete sections,horizontal pull rods and a grouting material. The plurality of prefabricated concrete sections are stacked one by one in two semi-closed cavities defined by flanges and a web of the existing H-shapedsteel column; the horizontal pull rods are arranged in the longitudinal direction of the existing H-shaped steel column at a certain interval, and the two ends of the horizontal pull rods are respectively welded with the two flanges of the existing H-shaped steel column; a formwork is adopted to wrap the existing H-shaped steel column, and then the grouting material is filled with the gaps between the H-shaped steel column and the prefabricated concrete sections; and after the formwork is removed, partial prefabricated reinforcing columns are formed. The invention further discloses a construction process of the partial prefabricated reinforcing structure of the existing H-shaped steel column. The prefabricated concrete sections are convenient for industrial production and high in construction efficiency; and the grouting material can combine the prefabricated concrete sections and the existing H-shaped steel column into a whole, so that the bearing capacity of an original component isremarkably improved.

Description

technical field [0001] The invention belongs to the field of building structure reinforcement, and in particular relates to a partially prefabricated reinforcement structure with existing H-shaped steel columns and a construction process thereof. Background technique [0002] Steel structure is one of the main building structure forms in our country at present. It has the advantages of light weight, high strength and convenient construction, so it is widely used in various buildings and infrastructures. With the continuous increase of service time, the number of old steel structure buildings and facilities in my country is increasing, and the problem of steel structure reinforcement and repair has become increasingly prominent. In addition, the use and function of steel structures often change. At this time, reasonable reinforcement of existing structures is an important issue that cannot be avoided. [0003] Traditional steel structure reinforcement methods include enlargi...

AI Technical Summary

Problems solved by technology

The above reinforcement methods are either complex in construction, have limited improvement in bearing capacity, or have changed the shape of the building, so there are always various limitations in specific implementation

[0004] Taking the reinforcement of H-shaped steel columns as an example, if the original member is wrapped with reinforced concrete, that is, the H-shaped steel column is reinforced by a certain method of increasing the cross-section, there are disadvantages such as complicated construction, long period, difficulty in wet work on site, and difficult mixing of concrete.

In addition, if the H-shaped steel column is strengthened by locally pasting or welding the plate, there are disadvantages such as easy failure of the structural adhesive, large welding residual stress, and limited increase in the bearing capacity of the column.

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