JPH04185851A - Beam for structure - Google Patents

Abstract

PURPOSE:To improve the efficiency of work by arranging a pair of jointing pieces to be projected in the central axis direction from both the end sections of beams, and by providing the jointing pieces, with flanges having a plurality of bolt holes, to joint the beams and columns to each other, and the beams to each other. CONSTITUTION:Beams 10 consisting of H-shape steels are provided with a pair of jointing pieces 12, and the respective jointing pieces 1.2 are provided with flanges 13b having a plurality of bolt holes 16, and webs 13a having a plurality of nut holes 18. After that, the upper side end section of a lower side column 14 is provided with a cross-shaped web 38 and a jointing plate 40, and the lower side end section of the upper side column 14 is provided with a cross- shaped web 42 and a jointing plate 44. Then, the jointing plates 32 of jointing construction 24 are mounted on the jointing plate 40 of the lower side column 14, and the jointing plate 44 of the upper side column 14 is mounted on the jointing plates 32, and the beams 10 are jointed to each other with the jointing pieces 12. As a result, the beams can be jointed to the columns even from any directions.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to beams for buildings, and particularly to beams for so-called brevity buildings, in which members are processed in a factory and installed on site.

(Conventional technology) In prefabricated buildings, beams are not only connected to columns, but also to other beams, but the connection structure between beams and columns is different from that between beams. The beams are formed to have different joining structures depending on whether the mating member to be joined is a column or a beam. As a result, the beams have a large number of sleeves, which hinders mass production through prefabrication.

(Problem to be solved by the invention) In order to reduce the number of types of beams as much as possible, it is necessary to create a structure in which the beam-to-column joint structure can also be used for beam-to-beam joints.
Or conversely, the beam-to-beam joint structure may also be used for beam-to-column joints. But even after doing this.

Since the beam has a right and left side, there is no freedom in placing the beam.
When multiple beams are joined to a column or beam, the order of joining may be fixed, which poses problems such as many operational constraints.

Therefore, an object of the present invention is to improve the joint structure between beams and columns,
To provide a beam for buildings that can be used for a beam-to-beam joint structure, which can increase the degree of freedom in the arrangement of beams, and can improve work efficiency by eliminating the order of joining. be.

(Means for Solving the Problems) The present invention provides a beam of a building having a rectangular shape in a plan view, the central axis passing through the center of the short side in the plan view and extending along the long side, and the beam having a rectangular shape in plan view. A pair of joints that are arranged substantially point-symmetrically with respect to the intersection with an axis that passes through the center of the long side in the view and extends orthogonally to the central axis, and that protrudes from both ends of the beam in the direction of the central axis. piece, each of the joining pieces has a plurality of webs arranged at intervals from the central axis in a plan view and extending in the direction of the central axis, and a plurality of webs extending in a direction perpendicular to the web and away from the central axis. a flange having a bolt hole, the web having a head of a bolt passed through the bolt hole of the flange of another beam disposed orthogonally to the beam, or a nut screwed into the bolt. with acceptable pores.

(Operations and Effects) The beam is joined to a column or another beam by a pair of joining pieces provided at both ends of the beam. When attempting to join a beam to a column or another beam, there is no distinction between right and left beams, as the pair of joining pieces are essentially point symmetrical.
Beams can be easily brought to the joint.

When a beam is to be joined to a column, the holes in the web can accept the heads of bolts or nuts screwed into bolts that are passed through bolt holes in said flange of another beam arranged orthogonally. Because of this, there is no order in which beams can be joined, and any beam can be joined.

Because the web of the joining piece is arranged at a distance from the central axis in plan view, and the flange is orthogonal to the web, the web has a cross-like shape in plan view as a column joining structure. The thickness of the joint is substantially equal to 2 of the distance from the central axis of the web.
Can adopt cruciform web which is double. Each of the four pieces making up the cruciform web is provided with bolt holes that match the bolt holes in said flange of the joining piece. In this way, it is possible to use a simple column joint structure, and in addition,
Beams can be connected to column joint structures from any direction.

When a beam is to be joined to another beam, a bolt hole that matches the bolt hole of the flange of the joining piece may be provided at a predetermined location on the other beam.

(Example) The beam 10 shown in FIG. 1 is for a brevity building and is formed of H-beam steel that has a rectangular shape when viewed from two planes. The beam 10 has a vertical web lla and 2
The two flanges flb are arranged horizontally. The beam 10 includes a pair of joining pieces 12 (only one of which is shown in FIG. 1).

The pair of joint pieces 12 are arranged at the intersection of a central axis that passes through the center of the short side in plan view and extends along the long side, and an axis that passes through the center of the long side in plan view and extends orthogonally to the central axis. The beams are arranged substantially point-symmetrically with respect to each other, and protrude from both ends of the beam in the direction of the central axis.

To explain based on FIG. 2, which shows the joint portion between the beam and the column in a horizontal cross-sectional state, the pair of joint pieces 12 have a short side 11c.
Substantially point-symmetrical with respect to the intersection of a central axis C that passes through the center of the long side lid and extends along the long side lid, and an axis (not shown) that passes through the center of the long side lid and extends orthogonally to the central axis C. Therefore, the beam 10 on the left side of the column 14
The joining piece at the left end has the same shape as the joining piece 12 at the left end of the beam 10 on the right side of the column 14. Each joining piece 12 projects from the end of the beam 10 in the direction of the central axis C.

Each joining piece 12 includes a web 13a that is arranged at a distance G from the central axis C in plan view and extends in the direction of the central axis C, and a plurality of webs 13a that extend in a direction perpendicular to the web 13a and away from the central axis C. A flange 13b having a bolt hole 16 is provided.

In the illustrated embodiment, the web 13a is the web l of the beam 10.
A portion thereof is welded to the beam 10, and the remaining portion protrudes from the end of the beam 10. The web 13a has a hole 18 capable of receiving a bolt head or a nut screwed into a bolt hole 16 of a flange 13b of another beam 10 arranged orthogonally to the beam 10.

Explaining based on FIG. 2, for example, a beam placed perpendicular to the beam 10 on the left side of the column 14 is
4, the hole 18 of the web 13a of the joining piece provided on the left beam 10 is located below the flange 13b of the joining piece 12 provided on the beam 10 located below the column 14.
Also, the head of the bolt passed through the bolt hole 16 of. can accept Natsuto.

That is, as shown in FIG.
can accept the head of a bolt 20 for joining the flange 13b to the column joining structure 24, or a nut 22 screwed into the bolt 20. As shown in the figure, when the washer 26 is interposed, the hole 18 of the web 13a
is a hole larger than the washer 26 and nut 22.

In this specification, it is to this effect that the holes in the web are capable of receiving bolt heads or nuts.

In the embodiment shown in FIG. 4, the pillar 14 is made of a rectangular steel pipe, and is provided with a joint structure 24 at the joint location with the beam 10.

The joining structure 24 includes a web 30 having a cross shape in plan view, and joining plates 32 welded to the upper and lower ends of the web 30, respectively.

The thickness of the four pieces 31 of the web 30 is substantially twice the distance G of the joining piece 12 of the beam 10 from the central axis C of the web 13a. Therefore, as shown in the figure, when the beam 10 is formed of H-beam steel and arranged so that its web 11a is vertical, the thickness of the web piece 31 of the joint structure 24 is equal to the thickness of the web lla of the beam 10. be equal.

Each of the four pieces 31 constituting the cross-shaped web 30 is provided with a bolt hole that matches the bolt hole 16 of the flange 13b of the joining piece 12. As shown in FIG. 1, there are four bolt holes 16 in the flange 13b of the joining piece 12, but there are two bolt holes 34 in one piece 31 of the web 30 shown in FIG. There are also two bolt holes 36 provided in another piece 31 perpendicular to the piece 31. but,
Each phase is different.

This is to avoid the bolt for joining one beam to the joint structure 24 from interfering with the bolt for joining another beam perpendicular to the one beam to the joint structure 24, and in particular , is effective when the horizontal length of the flange 13b cannot be sufficiently counted. For example, joining structure 2
The two bolt holes 34 of one piece 31 of the web of No. 4 are connected to the bottom bolt holes 16 of the flange 13b of the joining piece 12.
and the second bolt hole 16 from the top, and align the two bolt holes 36 of another piece 31 perpendicular to the piece 31 with the top bolt hole 16 of the flange 13b of the joining piece 12.
and the second bolt hole 16 from the bottom. By doing this, when two mutually orthogonal beams 10 are joined to the joint structure 24, no bolts interfere with each other because there is no other bolt in the horizontal direction of one bolt.

The upper end of the lower column 14 is provided with a cruciform web 38 and an abutment plate 40, while the lower end of the upper column 14 is provided with a cruciform web 42 and an abutment plate 44. Then, the bonding plate 32 below the bonding structure 24 is placed on the bonding plate 40 of the lower column 14, and the bonding plate 44 of the upper column 14 is placed on the bonding plate 32 above the bonding structure 24.
I'll put it on. The opposing joining plates are joined by bolts and nuts. In this case, in order to firmly position the beam 10 in the horizontal direction, a plate 46 is protruded from the beam 10, and this plate 46, the joint plate 32 of the joint structure 24, and the joint plate 40 of the lower column are aligned. It is preferable to join with bolts. In the illustrated embodiment, the plate 46 is integral with the joining piece 12.

By providing the joint structure 24 having a cross-shaped web in a plan view on the pillar 14, as shown in FIG. 14. In this case, since the web 13a of the joint piece 12 has a hole 18 that can receive the bolt head or nut, all the beams 10 are connected to the joint structure 24 no matter which direction the beam is joined. can.

For example, the beam 10 on the left side is first connected to the web 3 of the joint structure.
0, the head or nut of the bolt for that purpose overhangs the joint between the joint piece 12 of the -L side beam and the web 30, but these are connected to the joint piece 12 of the upper beam.
In order to enter the hole 18 of the web 13a, the web 30 can be brought into contact with the flange 13b of the joint piece of the upper beam.

Note that the above-described joining structure 24 can be used even when the beam 10 is joined to the column 14 from three directions or two directions.

As shown in FIG. 5, when a beam 10 is to be joined to another beam 50, a joining piece 1 is
A bolt hole 52 is provided which matches the bolt hole 16 of the second flange 13b.

The bolt holes 52 provided in the beam 50 are aligned with every other bolt hole among the four bolt holes 16 in the flange 13b.

When attempting to join two beams 10 to the beam 50 on opposite sides of the beam 50, the bolt holes 52 provided in the beam 50 are
When the bolt holes 52 of each row are aligned with the bolt holes 16 of the flange 13b of the joint piece 12 of one beam, the two beams 10 are aligned in a straight line.
The interval between the two rows of bolt holes 52 is determined. In this case as well, the two beams 10 can be independently joined without regard to other beams.

Of course, the beam 50 can also be constructed according to the invention.

When the pillar 14 is provided with the joint structure 24 and the beam 50 is made of H-shaped steel as in the embodiment described above, the following functions and effects can be obtained.

When trying to join the beam 10 to the column 14 or the beam 50,
Bolts and nuts can be tightened while the joint piece 12 is temporarily placed on the joint plate 32 under the column joint structure 24 or on the flange 51 on the lower side of the beam 50. As a result, it is possible to avoid tightening while suspended by a crane or tightening while supporting by hand, making construction easier.

Even if a bolt breaks or comes off due to an accident during construction or after the building is completed, the joint piece remains on the joint plate or flange, so it is safe. .

This also means that the loads on the bolts can be reduced, since the loads can be distributed to the flanges of the joining plates or beams.

When the pillar 14 includes the joining structure 14, the lower pillar 14
There is no need to form the pillar 14 on the -E side as a so-called through pillar. That is, since the length of the pillar can be set for each floor, it becomes easy to carry and handle.

In addition, the pillars do not have to be in the same position on the first and second floors, providing a greater degree of freedom in plan planning.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a part of the beam according to the present invention, FIG. 2 is a horizontal sectional view of the joint between the beam and the column, and FIG.
FIG. 4 is an enlarged sectional view of three parts in the figure, FIG. 4 is a perspective view showing a state in which a beam and a column are joined, and FIG. 5 is a perspective view showing a state in which a beam and a beam are joined. 10.50: Beam, 12: Joint piece, 13a: Web, 13b = Flange, 14: Column, 16
: Bolt hole, 18: Hole, 24: Joint structure, 30: Cross-shaped web.

Claims (1)

[Claims] A beam of a building having a rectangular shape in plan view, with a central axis passing through the center of the short side in plan view and extending along the long side, and a beam passing through the center of the long side in plan view and extending along the central axis. A pair of joint pieces are arranged substantially point-symmetrically with respect to the intersection with an axis extending orthogonally, and project from both ends of the beam in the direction of the central axis, and each joint piece has a a web spaced apart from the central axis and extending in the direction of the central axis; and a flange having a plurality of bolt holes extending perpendicularly to the web in a direction away from the central axis; A beam of a building having a hole capable of receiving a head of a bolt passed through a bolt hole of the flange of another beam arranged orthogonally to the beam or a nut screwed into the bolt.