Reinforced constraint type rectangular concrete-filled steel tube column and construction method

Abstract

The invention provides a reinforced constraint type rectangular concrete-filled steel tube column and a construction method. The reinforced constraint type rectangular concrete-filled steel tube column is composed of L-shaped steel plates, constraint rods, locking rods, inner supporting rods and concrete, wherein the constraint rods, the locking rods and the inner supporting rods are all steel components; the two L-shaped steel plates are spliced to form a rectangular steel tube; the constraint rods are welded to the two inner side faces of the L-shaped steel plates; the heights of the constraint rods on the two L-shaped steel plates are different; the constraint rods do not collide with one another; and when the two L-shaped steel plates are spliced to form the rectangular steel tube, a circular hole channel is formed between the two sets of constraint rods at the same horizontal position, the locking rods are located in the circular hole channel formed by the constraint rods, the inner supporting rods are located in hole channels of the locking rods, and the rectangular steel tube formed by the L-shaped steel plates is filled with the concrete. In the construction process, the inner supporting rods penetrate into the hole channels of the locking rods through traction rods, and the inner supporting rods open the locking rods to apply pretension force to the constraint rods. The reinforced constraint type rectangular concrete-filled steel tube column has the advantages of being good in stress performance, high in bearing capacity, convenient to construct and the like, and economic benefits are good.

Description

technical field [0001] The invention relates to the field of composite structures in building structures. Background technique [0002] Concrete-filled steel tube columns have the advantages of high bearing capacity and good seismic performance, and can give full play to the advantages of steel tubes and concrete. The joint structure of the rectangular steel tube concrete column is simple and convenient for construction, but the rectangular steel tube has weak constraints on the internal concrete, and the midpoint of the long side has the weakest constraint, which cannot play a good role in restraint, and has an impact on the internal concrete compressive strength Compared with the circular concrete-filled steel tube column with the same steel content, its bearing capacity is smaller. In order to improve the bearing capacity of rectangular concrete filled steel tube columns, it is necessary to strengthen the confinement effect of the steel tubes on the internal concrete. ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the rectangular concrete-filled steel tube column has weak constraints on the internal concrete and low bearing capacity, the invention discloses a reinforced-constrained rectangular concrete-filled steel tube column and a construction method, which has the advantages of simple structure, high bearing capacity and convenient construction.

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