Reinforcing structure and method of reinforced concrete column with rectangular section and axial pressure

Abstract

The invention discloses a reinforcing structure and method of a reinforced concrete column with a rectangular section and axial pressure. The method mainly comprises the three stages of pre-loading ofthe reinforced concrete column, arch cambering of steel plates and unfolding of the steel plates. Firstly, the rectangular concrete column is pre-loaded; secondly, two pairs of angle iron are arranged at the column top and the column bottom respectively, reinforced steel bars are placed at the two sides of the middle portion of the column respectively and located between concrete and the steel plates, then the two rectangular steel plates are fixed to the two sides of the concrete column through stainless steel bolts, and thus arch cambering of steel plates is achieved. Finally, bolts are symmetrically arranged in the length direction of the column, are screwed up according to a certain sequence, the steel plates are gradually unfolded, the steel plates and the reinforced concrete columnform an effective combination, and joint stress is achieved. By means of the reinforcing structure and method, the problem that during reinforcing of an existing rectangular concrete column, stress between the concrete and the steel plates in the load-bearing reinforced concrete column is lagged can be effectively solved, and reinforcing of the corners of the concrete column is also enhanced at the same time.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to a reinforcement structure and method for a rectangular section axially compressed reinforced concrete column. Background technique [0002] In recent decades, the existing buildings, bridges and a large number of infrastructures are often in disrepair due to the harsh service environment, resulting in relatively large economic losses. Since the column is the main vertical load-bearing member in the existing concrete structure, since the end of the last century, a large number of researchers at home and abroad have carried out experiments and theoretical studies on the reinforcement of reinforced concrete columns with steel plates, and there have been relatively mature reinforcement methods. technical means. However, studies on steel plate reinforced concrete columns often focus on the mechanical properties of steel plate reinforced reinforced concrete columns, and seldom ...

AI Technical Summary

Problems solved by technology

However, studies on steel plate reinforced concrete columns often focus on the mechanical properties of steel plate reinforced reinforced concrete columns, and seldom examine the reinforcement effect of loaded reinforced concrete columns.

At the same time, it is difficult to effectively strengthen the corners of rectangular cross-section reinforced concrete columns with carbon fiber composite materials.

In addition, in the loaded reinforced concrete column, there is a stress hysteresis effect between the concrete and the steel plate, resulting in problems such as low reinforcement efficiency and inconspicuous reinforcement effect, which have rarely been reported in previous studies

Therefore, these series of technical problems set a great obstacle for the wide application of reinforced concrete columns reinforced with steel plates in the field of structural reinforcement.

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