JPH11269985A - Method and structure for joining rectangular steel pipe column to beam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and structure for joining a rectangular steel pipe column having a closed cross section to a beam made of I-steel or H-steel via a pair of upper and lower junction metal fittings, for stably securing junction strength and for enhancing constructibility to make it possible to reduce the period and cost of construction work. SOLUTION: In this joining method and structure, the base of a junction metal fitting 2 is tightened to a rectangular steel pipe column 1 by bolts in a factory and conveyed to a construction site, and the end face of a beam is butted against the other end face of the beam mounting plate 2P of the junction hard ware 2 at the construction site. A splice plate 5 is abutted thereto in such a way to sandwich the butted beam mounting plate 2P and the upper and lower flanges of the beam from above and below, and they are tightened together with through bolts 6. Also, the splice plate 5 is abutted thereto in such a way as to sandwich the abutted beam mounting plate 20 and the web of the beam from both sides and they are tightened with the through bolts 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a square steel pipe which is used when a steel structural building is constructed and a steel pipe having a closed cross section is used as a column, and an H-shaped steel beam is mainly attached to the column. The present invention relates to a joining method and a joining structure of a column and a beam.

[0002]

2. Description of the Related Art In recent years, particularly in large structures, a bidirectional rigid frame structure using a square steel pipe having a closed cross section as a column member and an H-section steel as a beam member has been frequently used in order to improve earthquake resistance. In order to obtain the bidirectional rigid frame structure, a through-diaphragm type as shown in FIG. 7 is generally used for joining a square steel tube column having a closed cross section and an H-shaped steel beam, and a square steel tube column a, a diaphragm b, and a diaphragm b And mounting part d of beam c
Was performed by welding w. In this joining method, there are many welding points, high welding technology and strict quality are indispensable, there is a problem that a long time is required for the construction, and the construction cost is high.

[0003] In order to solve such problems,
For example, JP-A-7-216987 and JP-A-5-12
As disclosed in Japanese Patent No. 5764, there has been proposed a method of joining a square steel tubular column and an H-shaped steel beam using a pair of joining hardware and bolts, instead of a diaphragm type.

[0004] In the former joining method, a large amount of one-side bolts having an expensive and complicated mechanism is used as bolts, so that not only the cost is increased, but also the fastening work is time-consuming compared to through bolts. There is also. In the latter joining method, the back plate and the beam fixing bracket mounting bolts are attached to the hollow pillar body and transported to the construction site in a state where they are temporarily fastened, but at this time, since the bolts are projected outside, Bolts may be damaged during transportation to the construction site.

In addition, there is a problem that it is difficult to stably maintain accuracy in on-site construction, and there is also a problem that if bolt fastening fails, it is virtually impossible to start over.
Furthermore, since the torque coefficient is not changed between the temporary fastening at the factory and the construction (fastening) at the site, complicated rust and water wetting prevention measures are required, and there is also a problem that the construction cost burden increases. .

[0006]

SUMMARY OF THE INVENTION The present invention relates to the problem of the conventional joining method when, for example, an H-shaped steel beam is joined to a square steel tubular column having a closed cross section via a pair of upper and lower joining hardware. The present invention provides a joining method and a joining structure for a square steel tubular column and a beam that can stably secure the joining strength, improve the workability, shorten the construction period, reduce the construction cost, and the like.

[0007]

Means for Solving the Problems The present invention provides the following (1) to
(10). (1) A beam is mounted on a square steel tubular column having a closed cross section through an integrated metal fitting composed of a beam mounting plate having an H-shaped cross section having upper and lower flanges and a web, and a substrate bonded to one end surface of the beam mounting plate. This is a method of joining a square steel pipe column and a beam to be joined.After fastening the board of the jointed metal to the predetermined position of the square steel pipe column at the factory and fastening it with bolts and transporting it to the construction site, the square steel pipe column is After standing at the position, the tip end surface of the beam is abutted against the other end surface of the beam mounting plate of the joint hardware, and the splice plate is abutted so that the butted beam mounting plate and the upper and lower flanges of the beam are sandwiched from above and below, and through bolts are used. A method of joining a square steel tubular column and a beam, wherein the beam is fastened and a splice plate is abutted so as to sandwich a beam mounting plate and a web of a beam that are abutted from both sides, and fastened with a bolt. (2) The square steel pipe column according to (1), wherein at one or both of the splice plate and the beam mounting plate, minute irregularities for increasing frictional resistance are formed at a joint surface between the splice plate and the beam mounting plate. Beam joining method. (3) The square steel pipe column according to (1) or (2), characterized in that at one or both of the splice plate and the beam, minute irregularities for increasing frictional resistance are formed at a joint surface between the splice plate and the beam. Beam joining method. (4) In any one of (1) to (3), a filler plate is interposed between one or both of the flange of the beam mounting plate and the flange of the beam and the splice plate, and then the splice plate is abutted. A method for joining square steel tubular columns and beams, characterized by fastening with through bolts. (5) In the method (4), a high friction plate is used as the filler plate.

(6) A square steel tube column and beam joined to a square steel tube column having a closed cross section via an integrated joint hardware consisting of an H-shaped beam mounting plate having upper and lower flanges and a web, and a substrate. The joint structure is such that the base plate of the joint hardware is fixed to the square steel tubular column with only through bolts, and the beam mounting plate and the upper and lower flanges and the web of the opposite joint metal are fixed by the splice plate and through bolts. The joint structure of square steel tube columns and beams. (7) In (6), at least one of the splice plate and the beam mounting plate or the both surfaces of the splice plate and the beam mounting plate have minute irregularities for increasing frictional resistance. Column and beam joint structure. (8) The square steel pipe column according to (6) or (7), wherein fine irregularities for enhancing frictional resistance are formed on one or both of the splice plate and the beam at a joint surface between the splice plate and the beam. Beam joint structure. (9) The joint structure between a square steel tubular column and a beam according to any one of (6) to (8), wherein a filler plate is interposed between the splice plate and the flange of the beam. (10) The joint structure between a square steel tubular column and a beam according to claim 9, wherein in (10), the filler plate is a high friction plate.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is applied, for example, to obtain a rigid frame structure composed of a square steel pipe column and an H-shaped steel beam as shown in FIG. The structure of the square steel column and the beam according to the present invention is as follows. The square steel column 1 having a closed cross section is combined with an integrated metal fitting 2 composed of a beam mounting plate 2p having an H-shaped cross section having upper and lower flanges and a web, and a substrate 2b. The H-shaped steel beam 4 is fastened to a predetermined position of the steel pipe column 1 with a through bolt 3 so that the tip end surface of the H-shaped steel beam 4 abuts against the other end surface of the beam mounting plate 2 p of the joint fitting 2. The splice plate 5 is contacted so as to sandwich the upper and lower flanges from above and below, and is fastened with the through bolts 6, and the splice plate 7 is contacted so that the butted beam mounting plate 2p and the web of the H-shaped steel beam 4 are sandwiched from both sides. It is constructed by fastening with bolts 8.

The rigid frame structure composed of the square steel tube columns 1 and the H-shaped steel beams 4 can be basically constructed by, for example, procedures shown in FIGS. FIG. 2A shows a square steel tubular column 1 having a closed cross section, and bolt holes 9 are drilled at predetermined positions at predetermined intervals. This bolt hole is for attaching the metal joint 2 shown in FIG. This joint metal fitting 2 is for attaching the H-shaped steel beam 4 to the square steel tubular column 1, and has a beam mounting plate having an H-shaped cross section having upper and lower flanges 10 f with bolt holes 10 and a web 10 u with bolt holes 11. 2p and a board 2b having a bolt hole 12 joined to the end face of the beam mounting plate 2p. As shown in FIG. 2 (c), the joint metal 2 and the square steel column 1 are aligned with the bolt holes 9 of the square steel column 1 and the bolt holes 12 formed in the substrate 2b of the joint 2 and fastened by the bolts 3. I do.

Next, as shown in FIG.
The end face of the H-shaped steel beam 4 having the bolt hole 13 in the f and the bolt hole 15 in the web 14 is fixed to the square steel pipe column 1 shown in FIG. The upper and lower flanges of the beam mounting plate 2p where the splice plates 5a and 5b for the upper flange and the splice plates 5c and 5d for the lower flange where the bolt holes 16 are drilled as shown in FIG. 10f and H-beam 4
Abut on the upper and lower flanges so as to be sandwiched from above and below, respectively. And the upper and lower flanges 10f of the beam mounting plate 2p
The bolt holes 16 of the splice plates are aligned with the bolt holes 10 of the H-shaped steel beam 4 and the bolt holes 13 of the upper and lower flanges 13f of the H-beam 4 and fastened by the bolts 6 as shown in FIG.

A bolt hole 1 as shown in FIG.
7 spliced plates 7a and 7b for web
10u of the web 10u of the opposing beam mounting plate 2p
And the web 14 of the H-shaped steel beam 4 so as to be sandwiched from both sides, and the bolt hole 11 of the web 10u of the beam mounting plate 2p.
The bolt holes 15 of the splice plates 7a and 7b are aligned with the bolt holes 15 of the web 14 of the H-beam 4 and fastened by bolts 8 as shown in FIG.

In this way, it is possible to construct a rigid frame structure composed of the square steel tubular columns 1 and the H-shaped steel beams 4 as shown in FIG. The bolt 3 used in the present invention,
As shown in FIGS. 5 and 6, for example, as shown in FIG. 5, a headed high-strength bolt (through bolt) including a bolt shaft 19 having a pin tail 18 formed at a distal end thereof for controlling a fastening torque, a washer 20, and a nut 21. (Hereinafter referred to as “high-strength bolt”) 22 can be used. As the high-strength bolt (through bolt) 22, it is effective to use a torcia-type high-strength bolt that has a stable fastening axial force, is excellent in temperature dependency, and has excellent overcoating compatibility, and has been subjected to a rust-proof treatment. is there.

In order to further stabilize the fastening by these bolts, the splice plates 5a to 5d to be fastened by the bolts, the beam mounting plate 2p and the splice plates 5a It is effective to increase the frictional resistance, for example, to form fine irregularities on one or both of the joint surfaces of the beam mounting plate 2p and the upper and lower flanges 13f of the H-shaped steel beam 4.

Also at the joint surface between the splice plates 7a, 7b and the web 14 of the H-shaped steel beam 4, one or both of the joint surfaces between the splice plates 7a, 7b and the beam mounting plate 2p increase the frictional resistance. It is effective to form fine irregularities. The minute unevenness can be formed by, for example, rolling or machining (including press working).

The splice plates 5a and 5b, 5
Beam mounting plate 2p fastened by bolts via c and 5d
If there is a step between the flange 10f of the H-beam 4 and the upper surface of the flange 13f of the H-beam 4, it is possible to ensure that the flange 13f of the H-beam 4 is fastened by the splice plates 5a and 5b, 5c and 5d. Because it is not possible, how to build (gap)
For adjustment, it is effective to fill and interpose a filler plate in this step.

On the surface of the filler plate, for example,
By forming the fine irregularities, it is possible to function not only as a construction adjustment but also as a high friction plate. The flange 10f of the beam mounting plate 2p and the flange 13f of the H-shaped steel beam 4 are formed.
And one or both of the above and a splice plate 5a
To 5d, the frictional resistance between the joining surfaces is increased to further secure the joining strength. As a high friction plate, a steel plate with fine irregularities is mainly used,
Any material that has a predetermined strength and can stably secure the joining strength by increasing the frictional resistance of the joining surface may be used, and may be made of a material other than steel.

In the method of joining a square steel pipe column and a beam according to the present invention, basically, when constructing a rigid frame structure with a square steel pipe column and a beam, the assembly work is shared between a factory and a construction site. The main features of the method of fixing the metal fittings to the square steel tubular column 1, the types of bolts used for the fixing, the method of attaching the beam to the metal fittings, and the joining structure obtained by this joining method.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example of a method for joining a square steel pipe column and a beam according to the present invention and an example of a joint structure between a square steel pipe column and an H-shaped steel beam obtained by this method will be described with reference to FIG. At the factory, a bolt hole 9 is provided at a predetermined position of the square steel pipe column 1, a bolt hole 12 is provided on the substrate 2b of the metal joint 2, a bolt hole 10 is provided on the upper and lower flanges 10f of the beam mounting plate 2p, and a bolt hole 11 is provided on the web 10u of the beam mounting plate 2p. Then, as shown in FIG. 6 (a), the substrate 2b of the metal joint 2 is fastened to the square steel pipe column 1 with the high-strength bolts 3 and transported to the construction site.

As shown in FIG. 6B, a bolt hole 13 is drilled in the upper and lower flanges 13f of the H-shaped steel beam 4, and a bolt hole 15 is drilled in the web 14, and are conveyed to the construction site.
Trucks, trolleys (including freight cars), ships, and the like are used for transport to the construction site, and cranes are used for unloading and loading. At the construction site, the square steel pipe column 1 is erected at a predetermined position, and the beam mounting plate 2p
Upper splice plates 5a and 5b on the upper flange 10f
And the lower flange 10 of the beam mounting plate 2p of the joint hardware 2
The lower splice plates 5c and 5d are temporarily fastened to f by the high-strength bolts 6, respectively.

The web 10u of the beam mounting plate 2p has
The splice plate 7b (and 7a) is abutted and temporarily fastened with the high-strength bolt 8. In this state, as shown in FIG. 6 (c), the tip of the H-shaped steel beam 4 is
3f is inserted between the splice plates 5a and 5b, the lower flange 13f is inserted between the splice plates 5c and 5d, and the web 14 is inserted between the splice plates 7a and 7b. The tips of the shaped steel beams 4 are butted.

At this time, the upper flange 10 of the beam mounting plate 2p
6D, there is a step aa between the upper surface of the H-shaped steel beam 4 and the upper surface of the upper flange 13f of the H-shaped steel beam 4, and the splice plates 5a to 5d and the flange of the H-shaped steel beam 4 remain as they are. Since a gap is formed between 13f and the fastening by the bolt 6 cannot be ensured, the filler plate 23 is interposed in the step aa so that no gap is formed.

The filler plate 23 is, here,
It is used for adjusting the construction (gap). Here, the filler plate 23 is formed by the upper and lower flanges 13 of the H-shaped steel beam 4.
Although it is interposed on the upper surface side of f, it may be interposed on the lower surface side of the upper and lower flanges 13f of the H-shaped steel beam 4. In this example, in order to facilitate installation of the H-shaped steel beam 4 on the beam mounting plate 2p of the joint fitting 2, the flange 10f of the beam mounting plate 2p is made thicker on the outside, and the upper surface of the flange 10f and H Step aa between upper surfaces of flanges 13f of section steel beam 4
(Insertion space).

From the state shown in FIG. 6C, as shown in FIG. 6D, the upper and lower flanges 10 of the beam mounting plate 2p of the joint hardware 2 are formed.
f and the upper and lower flanges 13 of the H-shaped steel beam 4 are sandwiched between splice plates 5a and 5b, 5c and 5d, fastened with high-strength bolts 6, and the web 10u of the beam mounting plate 2p of the joint hardware 2 and the H-shaped steel beam 4 Web 14 is sandwiched between splice plates 7a and 7b and fastened with high-strength bolts 6.

In this manner, the joint metal 2 is
The H-shaped steel beam 4 is joined through
A rigid frame structure composed of the square steel tube columns 1 and the H-shaped steel beams 4 is constructed. A crane is used for the work at the construction site as in the related art.

In the above embodiment, in the factory,
Bolt holes 10, 11, 13 are formed in the flange 10f and the web 10u of the beam mounting plate 2p, and the joint surfaces of the splice plates 5a to 5d, 7a, and 7b in the upper and lower flanges 13f and the web 14 of the H-shaped steel beam 4. , 15 are formed, and fine irregularities (not shown) for increasing the frictional resistance are formed by machining, and each of the splice plates 5a to 5
Similarly, for the joint surfaces of d, 7a and 7b, bolt holes 1
After drilling holes 6 and 17, minute irregularities (not shown) are formed by machining, so that the joint strength of each joint by bolt fastening can be secured stably.

The present invention is not limited to the above embodiment. For example, although an H-beam is used as the beam, the present invention is also applicable to a case where a beam made of an I-beam or another similar material is used. In addition, the number and arrangement of bolt holes, types of various bolts, measures to increase the friction between the joint surfaces between the members including the filler plate, the presence or absence, the assembly procedure, etc. Modifications may be made within the range that satisfies claims 1 to 10 according to the mounting conditions, strength conditions, and the like.

In the present invention having the above configuration, the following effects can be obtained. (1) The metal fittings can be easily and accurately attached to the square steel pipe columns at the factory, and the burden of highly accurate assembly work at the construction site can be reduced. (2) Since the square steel tubular column is not transported with the bolts protruding outside as in the conventional example, there is no possibility that the bolts will be damaged due to the transport. (3) Bolt fastening is completed at the factory and construction site.
From the factory to the construction at the construction site, measures to prevent rust and water wetting to stabilize the torque coefficient at the time of fastening to the bolt can be reduced. (4) In this example, it is not necessary to use an expensive one-side bolt, so that the cost burden can be reduced. (5) By taking measures to increase friction on the joint surface between the members, the joint strength can be more stably secured. As a whole, the joint strength can be secured stably, the construction efficiency can be improved, and the construction cost can be reduced.

[0029]

According to the present invention, when a beam is joined to a square steel tubular column having a closed cross section through a pair of upper and lower joining hardware, the workability of the joining is enhanced, the joining strength is stably ensured, and the construction is performed. Costs can also be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a three-dimensional explanatory view showing an example of a rigid frame structure including square steel tubular columns and beams according to the present invention.

FIG. 2 is a three-dimensional explanatory view showing an example of an assembling procedure of the example of the joint structure of the square steel tubular columns and beams in FIG. 1;

FIG. 3 is a three-dimensional explanatory view of an H-shaped steel beam used in the example of the joint structure between the square steel pipe columns and the beam in FIG. 1;

FIG. 4 is a three-dimensional explanatory view showing an example of a splice plate used in an example of a joint structure between a square steel tubular column and a beam according to the present invention.

FIG. 5 is an explanatory side view showing an example of a through bolt used in an example of a joint structure between a square steel tubular column and a beam according to the present invention.

FIG. 6 is an explanatory view showing an embodiment of a joint structure between a square steel tubular column and a beam according to the present invention, and FIG. 6 (a) is a partially cutaway side sectional view showing a fixing state of a metal joint to the square steel tubular column. (B) is a partially cutaway side view showing an example of an H-shaped steel beam attached to a square steel tubular column via a joint hardware, and (c) is an H-beam attached to a tip end surface of a beam mounting plate of the joint hardware. FIG. 3D is an explanatory side view showing a state where the end faces of the shaped steel beams are abutted, and FIG.
FIG. 4 is an explanatory side view showing a state where the shaped steel beam is completely attached.

FIG. 7 is a three-dimensional explanatory view showing an example of a rigid frame structure using a conventional through-diaphragm square steel tubular column.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Square steel pipe pillar 2 Joining hardware 2p Beam mounting plate 2b Substrate 3 Bolt 4 Beam 5, 5a-5d Splice plate 6 Bolt 7, 7a, 7b Splice plate 8 Bolt 9 Bolt hole (Square steel pipe column) 10 Bolt hole (Beam mounting plate) Flange) 10f Flange 10u Web 11 Bolt hole (beam mounting plate web) 12 Bolt hole (substrate) 13 Bolt hole (H-shaped steel beam flange) 13f H-shaped steel beam flange 14 Web (H-shaped steel beam) 15 Bolt hole (H 16 and 17 bolt hole (splice plate) 18 pin tail 19 bolt shaft 20 washer 21 nut 22 high strength bolt 23 filler plate

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hachiro Sakata 20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel Corporation Technology Development Division (72) Inventor Yumi Shimura 2-6, Otemachi, Chiyoda-ku, Tokyo 3 Inside Nippon Steel Corporation

Claims (10)

[Claims] 1. A joint between a square steel tubular column and a beam, wherein the beam is joined to a square steel tubular column having a closed cross section via an integrated joint hardware including an H-shaped beam mounting plate having upper and lower flanges and a web and a substrate. At the factory, at the predetermined position of the square steel pipe column, at the predetermined position of the square steel pipe column, after fastening the board of the joining hardware with bolts and transporting it to the construction site, the square steel pipe column is erected at the predetermined position at the construction site, and then the beam The tip end surface is abutted against the other end surface of the beam mounting plate of the joint metal, and the spliced plate is abutted so as to sandwich the butted upper and lower flanges of the beam from above and below, and is fastened with a through bolt. A method for joining a square steel tubular column and a beam, wherein a splice plate is abutted so as to sandwich the web of the beam from both sides and fastened with a bolt. 2. The square steel pipe according to claim 1, wherein at least one of the splice plate and the beam mounting plate is formed with a small unevenness at the joint surface between the splice plate and the beam mounting plate to increase frictional resistance. How to join columns and beams. 3. The square steel tubular column according to claim 1, wherein at least one of the splice plate and the beam has minute irregularities for enhancing frictional resistance at a joint surface between the splice plate and the beam. Beam joining method. 4. A sprite plate is abutted between one or both of a flange of a beam mounting plate and a flange of a beam and a splice plate, and then the sprite plate is brought into contact with the splice plate and fastened with a bolt. The method for joining a square steel tubular column and a beam according to claim 1. 5. The method according to claim 4, wherein a high friction plate is used as the filler plate. 6. A joining of a square steel tubular column and a beam in which a beam is joined to a square steel tubular column having a closed cross section via an integrated joint hardware including an H-shaped beam mounting plate having upper and lower flanges and a web and a substrate. The structure is such that the joint metal substrate is fixed to the square steel tubular column by through bolts only, and the beam mounting plate of the joint metal and the upper and lower flanges of the beam and the web are fixed by the splice plate and through bolts. Characteristic is the joint structure of square steel column and beam. 7. The splice plate and the beam mounting plate, each of which has one or both of the splice plate and the beam mounting plate formed with fine irregularities for increasing frictional resistance. Joint structure of square steel column and beam. 8. The square steel tubular column according to claim 6, wherein minute irregularities for increasing frictional resistance are formed on one or both of the splice plate and the beam at a joint surface between the splice plate and the beam. Beam joint structure. 9. A joint structure between a square steel tubular column and a beam according to claim 6, wherein a filler plate is interposed between the splice plate and the flange of the beam. 10. The joint structure according to claim 9, wherein the filler plate is a high friction plate.