JPS59122643A - Connection structure of lattice beam - 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 The present invention relates to a joint structure of a lattice ring installed in a unit constructed by erecting steel columns at the corners of a floor beam assembled in the shape of a mouth. relates to a lattice ring joining structure in which the H-shaped steel floor beams of unit units stacked on an upper floor and the lattice rings of units on a lower floor are integrally tightened.

When configuring a multi-story rigid frame structure using unit units framed by square steel columns or H-shaped steel beams, beam materials are erected between the square steel columns on the side openings of the unit units. The structure of the bridge is such that it can withstand shear force and bending moment in the direction of the surface.

In particular, when building a rigid frame structure by stacking units in multiple layers, it is recommended to use a U-shaped unit with an opening at the top, which consists of steel columns erected at the corners of floor beams assembled in the shape of a mouth. , the floor beams and ceiling beams of the units do not overlap each other, and the ceiling height can be made sufficiently high, but from a structural strength standpoint, load-bearing walls and beams must be installed around the entire perimeter of the structure, which is also inconvenient from a planning perspective. That will happen.

Therefore, the present invention secures all of the south and north sides of the constructed multi-layer rigid frame structure as openings, and suspends load-bearing walls made of lightweight concrete walls on each outer side of the units located on the east and west sides. By constructing a lattice beam above the opening and integrally connecting this lattice beam with the floor beam of the upper floor unit, it is possible to prevent deflection and seating without increasing the size of the lattice beam. We provide a joint structure of lattice beams that does not bend and has sufficient strength, and since these beams are installed above the openings on the south and north sides, it is possible to have sufficient structural strength even if they are not installed inside the structure according to the plan. This provides a lattice beam joint structure that can be constructed with ease.

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is an overall perspective view of the unit unit Ul. This unit) Ul is a floor beam 11 made by framing H-shaped steel into a mouth shape.
Square steel columns 12a and 12b are provided at the four corners.

12c and 12d are erected. Furthermore, flooring material 13 and the like are laid down as required.

In other words, a plurality of units) are stacked vertically and horizontally and the units are rigidly connected to each other, lattice beams are constructed above the openings located in the north and south, and load-bearing walls are installed on the outside of each unit located on the east and west sides. are suspended to form one steel rigid frame structure as a whole.

FIG. 2 is a perspective view of the lattice beam 2. FIG.

This lattice beam 2 has a long length [a lattice bar 22 made of a plate, reinforcing bar, etc. is mounted on the upper surface of a lower chord member 21 made of shaped steel, etc., and the lattice bar 22 and the lower chord member 21 are connected to the lower joint plate 21
3.

Also, this lattice beam 2 has ring members 24 to attach face plates to both sides.
．． 24 are erected at both ends of the lower chord member 21, and an upper chord member 25 is passed over the heads of the ring members 24, 24, and the upper chord member 25 and the lattice bar 22 are connected by an upper joint plate 2G.

The ring members 24, 24 and the upper chord member 25 shown by the chain lines serve as temporary frame members necessary for pasting the panel material.
The rigidity resistance as a lattice beam is the lower chord member 21 and the lattice bar 2.
2 and the floor beam 11.

The lattice beam 2 configured in this manner is installed on the top of the square steel columns 12a and 12b or on the square steel columns 12c and 12d of the unit Ul.

FIG. 3A is an abbreviated diagram showing a state in which one end of the lattice beam 2 is connected to the square steel column 12a of the unit unit U1, and FIG. 3B is a diagram taken along the line x-X of FIG. FIG.

In this connection, the lower chord member 21 is fastened with a high tension bolt 32 or the like via a splicing plate 31 welded to the square steel column 12a.

In addition, if a ring material 24 is set up as a temporary material as shown by the chain line, this ring material 24 and the square steel column 12a are connected by bolts 33.
The lattice beam 2 can be easily attached to the steel column 12a by screwing it on.

Figure 4 shows the square steel column 1
FIG. 2 is a perspective view showing a state in which a lattice beam 2 is installed above the two parts between 2a and 12b or between 12c and 12d.

As described above, the unit U to which the lattice beam 2 is attached
A multi-story steel rigid frame structure is constructed by arranging similar units adjacent to each other on the periphery of 1, and sequentially placing similar units on the upper floors.

FIG. 5A is a simplified diagram showing a state in which another unit U2 (shown in FIG. 6) is placed on the upper floor of the unit U1.

The unit U2 on the upper floor and the unit Ul on the lower floor are joined with high tension bolts or the like with their pillars butted against each other. In this case, in order to prevent the column cores on the upper and lower floors from being eccentrically joined, a guide pin (not shown) provided at the column head of the lower floor unit U1 is drilled into the column bottom of the upper floor unit U2. Insert one ball into the guide hole (not shown),
They are always joined in a butted state at a predetermined position 16.

FIG. 5B is a sectional view taken along the Y-Y line in FIG. 5A.

As can be seen from this figure, the floor beam 51 made of H-shaped steel of the upper floor unit U2 is arranged directly above and parallel to the lattice beam 2.

FIG. 5C is a sectional view taken along the Z-Z line in FIG. A cross section of the floor beam 51 connected to the floor beam 51 via tension bolts or the like is shown.

In the figure, the lower flange 52 of the floor beam 51 and the upper chord member 2 of the lattice beam
The top chord 25 is a frame material that plays a temporary role, so if the top chord 25 is not spanned by a lattice beam, the top chord 25 is connected directly to the lattice beam. 22 and the lower flange 52 of the floor beam 51 of the upper floor unit are connected with high tension bolts,
The lattice beam 2 and the floor beam 51 of the upper floor unit are integrally connected.

In order to prevent this joint from loosening, boiling welding or the like is used on the high tension bolt after pressure tightening to ensure a reliable joint.

That is, the lattice beam 2 of the lower floor unit Ul and the floor beam 51 of the upper floor unit l-U 2 are connected by their lattice A-22 or upper chord 25 to the lower plunge 52 of the floor beam 51. The floor beam 51 and the lattice beam 2 maintain an integrally connected state, and in the case of the beam 2 having the upper chord member 25, a composite beam in which the floor beam 51 is superimposed on the upper chord member 21 is formed.

In Fig. 6, the lower floor unit 7)U2. FIG. 3 is a front view of a three-layer steel rigid frame structure on which U3 is placed.

In this way, the units Ul, U2. tJ3. ．． .

In a steel rigid frame structure stacked in multiple layers, the steel columns are rigidly connected vertically against each other, while the floor beams are rigidly connected to the steel columns, and the lattice beams are connected to the floor beams. Therefore, the steel upper part of the lower floor unit is almost rigidly connected to the upper floor unit.

As described above, the lattice beam installation structure of the present invention directly and integrally connects the lattice bar of the lattice beam installed in the lower floor unit to the floor beam of the upper floor unit, so the upper chord member as a structural member is used. Since it is not necessary to use placed beams, the floor beams on the upper floor and the lattice beams on the lower floor do not overlap, and even if the steel columns and lattice beams are connected with pins, the upper floor unit and the lower floor unit can be connected. The joints between the two are close to rigid joints, and the structure as a whole can ensure sufficient strength.

Therefore, in the beam installation structure according to the present invention, the lattice beam itself has a smaller cross section and beam back than a beam material constructed alone as a structural member, and a load-bearing wall is suspended on the outer surface of the east φ west. If the lattice beam mounting structure of the present invention is used at the top of the opening on the north and south sides, the size of the opening on the south side of the plan can be sufficiently large.

Moreover, in U-shaped units with an upper opening, this lattice beam can be easily installed by retrofitting it to the unit as a simple component without having to install it in advance as a structure of the unit. Steel frame rigid-frame structures constructed by stacking up multiple layers of steel are highly technologically effective.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of a unit in which the beam according to the present invention is used, FIG. 2 is a perspective view of a lattice beam according to the present invention, and FIG. 3A is a diagram showing a lattice beam connected to a square steel column. FIG. 3B is a partially omitted explanatory diagram showing a state in which the lattice beam according to the present invention is installed in a unit; Figure 5A is a partially omitted explanatory diagram showing a state in which the upper floor unit is placed on the lower floor unit; Figure 5B is a sectional view taken along the Y- and Y lines of Figure 5A; Figure C is a sectional view taken along the line zz in Figure 5A, and Figure 6 is a front view of the three-layer unit steel frame rigid structure. 11. Floor beam. 12a, 12b, 12c, 12d... Steel columns. 298. Lattice beam. 21. Lower chord material 22. ,, lattice bar. 2491, ring timber, 25. ,,Top chord material. U1, U2, U3. , , unit unit. Applicant Misawa Homes Co., Ltd. Agent Patent Attorney Kuninori Funabashi Figure 1 Figure 2 Figure 3 B 2 Figure 4

Claims (1)

[Scope of Claims] 1. In a steel rigid frame structure in which unit units are stacked in multiple layers, each unit is made up of steel columns erected at the corners of floor beams assembled in the shape of a mouth, and a lattice ring is formed between the upper parts of the columns. A lattice ring joint structure in which the lattice ring and the floor beam of the unit on the upper floor are integrally connected. 2. Claim t51, wherein the lattice ring is constructed by mounting a lattice bar on the upper surface of the lower chord member.
The joining structure of the lattice ring described in Section 1. 3. The lattice ring is characterized in that a lattice spar is mounted on the upper surface of the lower chord, scraps are erected at the side ends of the lower chord, and the upper chord is erected above. A lattice ring joining structure according to claim 1.