JPH06193143A - Column base structure of square steel tube column - Google Patents

Abstract

PURPOSE:To form a weldless base of column, obviate the need for a welding jig, prevent the occurrence of a weld strain, stabilize the quality and reduce the cost. CONSTITUTION:A base plate 16 is joined by means of a bolt by using four angle materials 3 instead of welding. Namely, rise pieces 4 of four angle materials 3 are joined with the respective outer surfaces of four sides of the lower end of a square steel tube column 1. Lateral pieces 5 of the four angle materials 3 are overlapped on the base plate 16 for joining by means of bolts. The base plate 16 is arranged on a foundation 21 and fixed by means of anchor bolts 22. One end of each angle material 3 is protruded from the width of the square steel tube column 1, and the protrusion part is joined with the adjacent angle material 3 through a joint component 11 between the angle materials.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column base structure of a non-welded rectangular steel pipe column.

[0002]

2. Description of the Related Art Conventionally, when fixing a column base of a prismatic steel pipe column, for example, a structure shown in FIG. 4 or 5 has been adopted.
That is, the base plate 30 is attached to the lower end of the rectangular steel pipe column 32.
Welded in advance by welding 33 at the factory,
This is a structure in which the base plate 30 is fastened and fixed to the anchor bolts 35 of the foundation 34. In the example of FIG. 4, a thick central plate is used as the base plate 30, and in the example of FIG. 5, the entire base plate 30 has the same thickness.

[0003]

However, in the above-mentioned conventional structures, the welding process of the base plate 30 is required in all of the factories, and the square steel tube column 32 and the base plate 30 are both large and heavy members. A large amount of time is required for temporary assembly during welding and inspection of welded parts. In addition, the problem of welding distortion occurs. Furthermore, the pillar 32
Since welding is performed on a large-sized member like the one shown above, a large jig is required for temporary assembly, and it takes time to replace the jig when changing the type of pillar, and it is also wide for storing unused jigs. You need a place. Manufacturing costs increase due to these various factors.

An object of the present invention is to provide a column base structure of a prismatic steel pipe column which can be assembled without welding, which eliminates the need for jigs, eliminates welding distortion, stabilizes quality, and lowers manufacturing costs. That is.

[0005]

The column base structure of the rectangular steel pipe column of the present invention is one in which the base plate is bolted using four angle members instead of welding. That is, four upright pieces of an angle member are bolted to each of the four outer surfaces of the lower end of the rectangular steel pipe column. Further, the horizontal pieces of these four angle members are overlaid on the base plate and bolted. This base plate is placed on the foundation and fixed to anchor bolts.

According to a second aspect of the present invention, in the structure of the first aspect, one end of each angle member, which is in the same direction in the circumferential direction of the steel pipe column, is made to project beyond the width of the rectangular steel pipe column, and this projecting portion is adjacent. They are bolted to each other through matching angle materials and angle material joint parts.

[0007]

According to this structure, since the base plate is fixed by using the angle member, the base plate can be joined to the rectangular steel pipe column without welding.

According to the second aspect of the present invention, since the adjacent angle members are bolted to each other via the angle-to-angle member joining component, firm joining can be performed, and thus a rigid joining structure can be obtained. Further, since the structure is such that the angle member and the angle member-to-angle member are joined by bolts, it is possible to absorb a tolerance such as distortion of the cross-sectional shape of the rectangular steel pipe column.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. The column 1 is made of a rectangular steel pipe, and four angle members 3 are bolted to the outer surface of the lower end of the column 1 on the four side. These angle members 3 have a length that protrudes to one side by a certain dimension than the width of the pillar 1. A plurality of bolt insertion holes 6 that are aligned with the respective bolt insertion holes 2 on the lower end side surface of the pillar 1 and the bolt insertion holes 12 of the angle member connecting member 11 are formed on the upright piece 4. An anchor bolt insertion hole 7 and a bolt insertion hole 8 are formed in the lateral piece 5.
These four angle members 3 are formed so that one end of each of the angle members 3 is in the same direction in the circumferential direction of the column 1 and protrudes beyond the width of the column 1.
The high-strength bolt 9 and the nut 1 which are respectively arranged on the four side surfaces at the lower end of each of the vertical pieces 4 and are inserted into the bolt insertion holes 2 and 6.
It is joined to the pillar 1 with 0.

The portion of each angle member 3 that projects beyond the width of the column 1 is bolted to the end of the angle member 3 that is adjacent thereto at a right angle through an angle member connecting member 11 having an L-shaped cross section. That is, one piece of the inter-angle joint member 11 is joined by the high-strength bolt 14 and the nut 15 which are inserted into the bolt insertion holes 12 and 6, and the other one piece is formed between the bolt insertion hole 13 and the angle member 3. The high strength bolt 9 and the nut 10 which are inserted into the bolt insertion hole 6 of the upright piece 4 and the bolt insertion hole 2 of the pillar 1 from the inside of the pillar 1 together with the angle member 3 together with the pillar 1
To be joined to. In the bolt joining of the angle member 3 and the angle-to-angle member 11 to be bolted, the vertical degree of the pillar 1 with respect to the horizontal piece 5 of the angle member 3 is checked in advance and then the main tightening is performed.

The base plate 16 is bolted to the four angle members 3 bolted to the pillar 1 in this manner.
The base plate 16 is a rectangular plate, and the anchor bolt insertion hole 17 and the bolt insertion hole 18 are formed along the respective sides.
Is formed. The horizontal pieces 5 of the four angle members 3 are superposed on the base plate 16, and the base plate 16 is joined to the angle member 3 by the high-strength bolts 19 and nuts 20 inserted through the bolt insertion holes 8 and 18. It Also in the joining of the base plate 16 to the angle member 3, final fastening is performed after confirming the verticality of the column 1 with respect to the base plate 16 in a state where the post is temporarily fastened. The bolts 9, 14 and 19 can be ordinary torcia bolts because the bolts are not hindered from being inserted during the joining work.

The base plate 16 is arranged on the foundation 21, and together with the angle member 3, the anchor bolt 22 of the foundation 21.
And tighten the nut 23 to secure. The work procedure at this time is as follows. That is, as shown in FIG. 3 (C), a bun-shaped mortar stand 24 is placed on the concrete upper surface 21b of the foundation 21, the base plate 16 is placed on the mortar stand 24, the pillar 1 is erected, and the nuts 23 are screwed to the anchor bolts 22. To do. Then, non-shrinkable mortar or the like is poured to form the top mortar portion 21a. Instead of using the mortar base 24, a level nut (not shown) is screwed on the anchor bolt 29, and the base plate 16 is mounted on the level nut.
It is also possible to form a gap for filling the mortar portion 21a between the base plate 16 and the concrete upper surface 21b of the foundation 21 by mounting.

According to this column base structure, since the base plate 16 is fixed by using the angle member 3, the base plate 16 can be joined to the rectangular steel pipe column 1 without welding. Further, since the adjacent angle members 3, 3 are bolt-bonded to each other via the angle member-to-angle member 11, a rigid joint can be achieved and a rigid joint structure can be obtained. Further, since the structure is such that the angle member 3 and the angle-to-angle member 11 are joined by bolts, it is possible to absorb a tolerance such as distortion of the cross-sectional shape of the column 1.

Since the column base structure can be formed without welding as described above, a large jig for welding is not required and there is no problem of welding distortion. Moreover, since it is bolted, the tolerance of the rectangular steel pipe column 1 can be absorbed and the quality is stabilized. Further, the manufacturing time can be shortened and the manufacturing cost can be reduced. A nut projects from the lower surface of the base plate 16 and is embedded in the top mortar portion 21a, so that it effectively acts on the shearing force of the column base.

In the above embodiment, each angle member 3 has a length projecting from the width of the pillar 1, and the angle member-to-angle member 1 is joined.
However, the angle member 3 may be omitted, and the angle member 3 may be adjusted to the width dimension of the column 1 instead of the length protruding from the width of the column 1.

[0016]

The column base structure of the rectangular steel pipe column of the present invention has 4
Since each vertical piece of angle material is bolted to each of the four sides of the square steel pipe column and the horizontal piece of these angle materials is bolted to the base plate, welding work is not required to join the base plate, and the manufacturing time is shortened. The cost can be reduced and the quality is stable. Also, a large jig for welding is not necessary.

According to the second aspect of the present invention, one end of each angle member is made to project beyond the width of the rectangular steel pipe column, and the adjacent angle members and the angle member-to-angle joint parts are bolt-bonded to each other. , A rigid joint structure can be used.

[Brief description of drawings]

FIG. 1A is a plan view of an embodiment of the present invention, and FIG.
Is a front view.

FIG. 2 is an exploded perspective view of the embodiment.

FIG. 3 is an explanatory diagram showing an assembling procedure of the embodiment.

FIG. 4 is a front view showing one conventional example.

FIG. 5 is a front view showing another conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Square steel pipe column, 3 ... Angle material, 4 ... Stand piece, 5 ... Horizontal piece, 9 ... High-strength bolt, 11 ... Angle material connection parts, 1
4 ... High-strength bolt, 16 ... Base plate, 21 ... Foundation,
22 ... Anchor bolt

Claims (2)

[Claims] 1. A rectangular steel pipe column has a lower end on four sides, each of which is bolted to a vertical piece of an angle member, and these four horizontal members of the angle member are stacked on a base plate and bolted to each other.
A column base structure of square steel pipe columns in which this base plate is placed on the foundation and fixed to anchor bolts. 2. One end of each of the angle members, which is in the same direction as the circumferential direction of the steel pipe column, is made to project more than the width of the rectangular steel pipe column, and the projecting portion is mutually connected via an adjacent angle member and an angle member joining component. The column base structure of the rectangular steel pipe column according to claim 1, which is bolted to.