JPS62125139A - Columnar body for forming steel bar structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention particularly relates to a column for forming a steel frame structure that constitutes a steel rigid frame consisting of square steel pipe columns and steel beams.

[Prior art]

Conventionally, in order to join a steel beam such as a shaped steel beam to a square steel pipe column H, a joint bracket was fixed to the side of the joint of the square steel pipe column by welding for ease of on-site work, and the steel beam was attached to this joint bracket with a joint bolt. (or by directly bonding a steel beam to the joint surface of a square steel pipe column).

[Problem to be solved by the invention]

By the way, when a steel beam is joined to a square steel pipe column via a bracket, not only the number of parts such as joining brackets and joining bolts increases, but also the amount of work on site increases accordingly.

In this case, the attachment of the joint bracket by welding is mainly done at the factory, so when transporting the joint bracket from the factory to the construction site, the joint bracket gets in the way and transport efficiency is greatly reduced (damage to the joint bracket can occur). In addition, direct welding of steel beams to rectangular pipe columns requires high construction precision, making it difficult to obtain product reliability on construction sites where work tends to be rough.

[Means for solving problems]

This invention was invented in order to solve the above-mentioned problems of the conventional art, and includes attaching a joint metal fitting having a wall thickness greater than that of the square steel pipe column to the joint part where the steel beam of the square steel pipe column is joined. This is a column for forming a steel frame structure, in which a plurality of screw holes for screwing beam joint bolts are formed in the peripheral wall of the joint hardware. Generally, high-strength bolts used for high-strength bolt connections consist of a bolt, a nut, and a washer gusset, but in this invention, a tapped thread is cut on the joining metal instead of the nut, enabling high-strength I-joining. There is. Therefore, it is extremely easy to rigidly connect a square steel pipe column and a steel frame, and the transportation efficiency of the square steel pipe column can be greatly improved. At the same time, the holes for inserting bolts can be selected arbitrarily, so the beam size can be adjusted with one type of joining hardware. There is a responsiveness to Furthermore, since the column of the present invention has no directionality, construction management on site is easy.

[Embodiments of the invention]

The present invention will be described with reference to an illustrated embodiment. A joining metal fitting 3 made of cast steel or the like is attached to a joint portion of a square steel pipe column 2 to which a steel beam 1 made of H-shaped steel, 1-shaped steel, etc. is joined.

A steel beam 1 is joined to this joining hardware 3 by a plurality of beam joining bolts 4.

The joining hardware 3 is fixed to the end faces of the upper and lower parts of the square steel pipe column 1 by butt welding or the like. Further, a plurality of screw holes 5 are formed in the four side peripheral walls of the joining hardware 3, and the beam joining bolts 4 are screwed into the screw holes 5.

In addition, the wall thickness of the joining hardware 3 is thicker than the wall thickness of the square steel pipe column 2 (
It will be done.

The number of beam joint bolts 4 and screw holes 5 and the cross section of the joint metal fittings 3 are designed to resist various stresses acting on the metal fittings.

In addition, when using the cast steel joining hardware 3, it is preferable to use cast steel for welded structures. Furthermore, the metal joint 3 can also be manufactured using a thick-walled square steel pipe, a hot-drawn steel pipe, or the like.

On the other hand, a joint plate 6 that contacts the side surface of the joint hardware 3 is fixed to the end of the steel beam 1 by welding or the like, and a through hole 7 facing the screw hole 5 is formed in the joint plate 6, and the beam joint bolt 4 is inserted into the through hole 7. Here, in order to realize tension bolt connection using high-strength bolts, the connection plate 6
The plate thickness of the beam is thicker than that of the flange web of the beam so that it can resist various stresses acting on the beam end. Furthermore, the fixity of the column-beam joint is ensured by bringing the joining surfaces of the joining plate 6 and the joining hardware 3 into close contact with each other using a beam joining pole l-, that is, a high-strength bolt, into which tension is introduced.

3, 4, and 5 show modified examples of the joint hardware 3. In FIG. 3, vertical stiffeners are installed in the joint hardware 3.
The rigidity of the joint metal fitting 3 is increased by forming the metal fitting 8 to have a substantially cross-shaped cross section. In addition, in Fig. 4, when the width of the steel column and the beam are the same or the column width is smaller than the beam width, the outer diameter of the joint hardware 3 is made slightly larger than the beam width of the steel beam 1, so that the width of the joint hardware can be adjusted. Workability has been improved by adding some extra space to absorb joint errors at the column/beam joints.

Figure 5 shows a metal joint with a solid cross section. According to this, the amount of steel material increases by the amount of solid material, but in the case of small-diameter joint hardware, the rate of increase in the amount of steel material is small and the number of processing steps is small, making it possible to manufacture joint hardware at low cost.

Note that FIGS. 6(a), (b), and (c) show column-beam joints where steel beams are joined in an L-shape, a T-shape, and a cross-shape, respectively.

〔Effect of the invention〕

This invention has the above configuration and can be expected to have the following effects.

■ Since the joining hardware is shaped so that it does not substantially protrude from the side surface of the square steel pipe column, it is not bulky to transport, greatly increasing transportation efficiency, and it is possible to eliminate accidents involving damage to the joining hardware.

■ As shown in Figure 6 (a), (b), and (c), it can be used as a column where steel beams are joined in an L-shape, T-shape, or cross shape. Since there is no problem and the types of pillars can be unified to one type, costs can be reduced through mass production.

■ Connect square steel pipe columns and steel beams using only beam connection bolts t41
Since only one joint can be performed, joining is extremely simple, and labor-saving and shortening of on-site work can be achieved.

■ Also, when using cast steel joints, the difference in size between the upper and lower columns can be easily accommodated since they are cast.

■ When joining, there is no support plate for the beam, so the amount of steel is reduced, and the bolt head does not protrude, so it fits well in terms of design.

[Brief explanation of drawings]

Figure 1 is an exploded side view of the column-beam joint in a steel rigid frame, Figure 2 is a sectional view taken along line A-A in Figure 1, Figure 3 is
FIG. 4 and FIG. 5 are cross-sectional views showing modified examples of joint metal fittings;
In Figures 6 (a), (b), and (c), the steel beams are L-shaped. FIG. 3 is a cross-sectional view of a column joint portion joined in a T-shape and a cross-shape. 1... Steel beam, 2... Square steel pipe column, 3
...Joining hardware, 4...Beam joining bolts,
5...Screw hole, 6...Joining plate,
7...Through hole, 8...Vertical stiffener. Figure 1 Figure 2 Figure 3 Figure 4 District 5 Figure 6 (a) Figure 6 (C)

Claims (1)

[Claims] A column body for forming a steel frame structure constituting a multi-story steel frame structure, in which a joint metal fitting is attached to a steel beam joint part of a square steel pipe column, and a bolt is screwed to the same wall of the joint metal piece. A column for forming a steel frame structure, characterized in that a plurality of screws are formed.