JPH06229067A - Reinforcing structure of steel square column - Google Patents

Abstract

PURPOSE:To reduce material cost by welding a reinforcing plate at least to one of a pair of opposite internal or external sides of a steel square column against an external force acting from a horizontal direction. CONSTITUTION:Reinforcing steel plates 3 are welded and fixed to a pair of opposite external sides 2 of a steel square column 1 having square cross section, against an external force X acting on the column 1 from a horizontal direction. Thereafter, reinforcing steel plates 13 are welded and fixed to a pair of the opposite internal sides 12 of the column 11, thereby applying a necessary reinforcement against the external force X, and doing without any useless reinforcement against an external force Y. According to this construction, an unnecessary reinforcement can be eliminated and a weight increase or the like can be restrained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure for a rectangular steel column used as a long column of a building structure such as a unit building.

[0002]

2. Description of the Related Art In a building structure of a unit building, a rectangular steel column having a square cross section is often used as a long column.

Generally, this type of long column is not only subjected to a static compressive load in the axial direction but also a dynamic buckling load. Therefore, the buckling strength must be taken into consideration in the design.

This buckling strength can be determined from the moment of inertia of area and the cross-sectional area of the long column. Based on this structural mechanics theory, the above-mentioned long pillar is a square cross section.

By the way, since the form and scale of a building are individual, additional reinforcement is often required in addition to the basic reinforcement structure. In such a case, the wall thickness of the square steel column is calculated based on the maximum load that acts on the long column in the horizontal direction, and the square steel column having a uniform wall thickness is adopted.
In addition, as a supplementary reinforcement of the connecting portion of the square steel columns, for example, the means shown in Japanese Utility Model Publication No. 59-43531 may be taken.

[0006]

However, in the above-mentioned reinforcing structure, since the wall thickness of the square steel column is increased uniformly, even the portion located in the direction not requiring the reinforcement is reinforced. As a result, the weight of the building structure and the cost of members may increase.

The present invention was created in consideration of such a situation, and by appropriately reinforcing the structure according to the form and scale of the building, unnecessary increase of the weight of the building structure and increase of the material cost are realized. It is an object of the present invention to provide a reinforcing structure for rectangular steel columns that can suppress the increase.

[0008]

In order to achieve the above object, the reinforcing structure for a rectangular steel column of the present invention is a rectangular column having a square cross section and can be attached to a column portion of a building structure. A reinforcing plate is welded and fixed to at least one set of a pair of outer peripheral surfaces or inner peripheral surfaces facing each other of the prismatic steel column, and reinforcement against external force acting on the prismatic steel column from a horizontal direction. It is characterized by having done.

[0009]

According to the reinforcing structure of the rectangular steel column of the present invention, when additional reinforcement is required, a new strength calculation is performed to calculate the wall thickness and size of the reinforcing plate. Then, the reinforcing plate is welded and fixed to at least one set of a pair of outer peripheral surfaces or inner peripheral surfaces of the rectangular steel column facing each other. by this,
While necessary reinforcement is applied to the external force acting on the rectangular steel column from the horizontal direction, unnecessary reinforcement can be eliminated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the reinforcing structure for a square steel column of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention, in which reference numeral 1 denotes a rectangular steel column as a long column having a square cross section.
The square steel column 1 has a wall thickness of 4.5 mm and an outer dimension of 100.
It is standardized to × 100 mm.

External forces X and Y are applied to the rectangular steel column 1 in directions orthogonal to each other from the horizontal direction, but the deformation of the rectangular steel column 1 due to the external force Y is negligible.

On the other hand, it is assumed that the external force X has a sufficient risk of causing flexural deformation of the rectangular steel column 1.

In this case, the pair of outer peripheral surfaces 2 and 2 (outer peripheral surfaces orthogonal to the external force X) of the rectangular steel column 1 facing each other have a wall thickness of 4.
The reinforcing plates 3 and 3 having a width of 5 mm and a width of 100 mm are fixed by welding.

In this way, when the external force X acts on the rectangular steel column 1 from the horizontal direction, and when it is necessary to additionally reinforce the rectangular steel column 1, a new strength calculation is performed and the reinforcing plate is added. Calculate the wall thickness and size of 3 as above. Then, the reinforcing plate 3 is welded and fixed to the pair of outer peripheral surfaces 2 and 2 of the rectangular steel column 1 facing each other, whereby necessary reinforcement against the external force X is made, while unnecessary reinforcement on the external force Y side is not required. I'm done.

FIG. 2 shows a second embodiment of the present invention, in which 11 is a square steel column. The dimensions of the rectangular steel column 11 are also standardized to have a wall thickness of 4.5 mm and an outer dimension of 100 × 100 mm.

External forces X and Y are applied to the square steel column 11 in directions orthogonal to each other from the horizontal direction. However, as in the first embodiment, the deformation of the square steel column 11 due to the external force Y is negligible. To do.

On the other hand, it is assumed that the external force X has a sufficient risk of causing flexural deformation of the rectangular steel column 11 and promoting its buckling.

In this case, the reinforcing plates 13 and 13 having a thickness of 4.5 mm and a width of 91 mm are welded to the pair of inner peripheral surfaces 12 and 12 (inner peripheral surfaces orthogonal to the external force X) of the square steel column 11 which face each other. Fix it.

As described above, the reinforcing plate 13 is welded and fixed to the pair of inner peripheral surfaces 12, 12 of the rectangular steel column 11 which face each other, thereby providing necessary reinforcement against the external force X, while eliminating the need for the external force Y side. No need to reinforce.

The present invention is not limited to this embodiment but can be widely applied to structures other than building structures (bridges, incidental equipment, etc.). Moreover, you may make it weld-fix a reinforcing plate to each of a pair of outer peripheral surface and inner peripheral surface which face each other of a square steel column.

[0022]

As described above, according to the present invention, a rectangular column having a rectangular cross section is reinforced to reinforce the rectangular steel column attached to the column portion of the building structure. A reinforcing plate is welded and fixed to at least one set of a pair of outer peripheral surfaces or inner peripheral surfaces facing each other of the column, and the rectangular steel column is reinforced against external force acting from the horizontal direction. If reinforcement is required, calculate the new strength and calculate the wall thickness and dimensions of the reinforcement plate. Then, the reinforcing plate is welded and fixed to at least one set of a pair of outer peripheral surfaces or inner peripheral surfaces of the rectangular steel column facing each other. This provides an effect that necessary reinforcement can be eliminated while external reinforcement that is applied to the rectangular steel column from the horizontal direction is required.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a rectangular steel column showing a first embodiment of the present invention.

FIG. 2 is a transverse sectional view of a rectangular steel column showing a second embodiment of the present invention.

[Explanation of symbols]

 1, 11 Square steel column (long pillar), 2, 2 A pair of outer peripheral surfaces facing each other, 12, 12 A pair of inner peripheral surfaces facing each other, 3, 13 Reinforcing plate, X External force acting from horizontal direction, Y Horizontal External force acting from the direction.

Claims (1)

[Claims] 1. A rectangular column having a rectangular cross section for reinforcing a rectangular steel column attached to a column portion of a building structure, the pair of rectangular prisms having an outer peripheral surface or an inner periphery facing each other. A reinforcing structure for a rectangular steel column, wherein a reinforcing plate is welded and fixed to at least one set of the surfaces to reinforce the rectangular steel column against an external force acting in a horizontal direction.