JPH1122001A - Structure of junction between closed section column and beam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct a rigid-frame structure which enables one piece of steel beam to be directly joined to a through steel column at a junction structure between a closed-cross-section column and a beam without requiring the steel column to be cut and a diaphragm and a bracket beam to be welded in place as they should in conventional cases, and which can stabilize the quality of the junction structure, reduce its cost, and sufficiently satisfy dynamic functions by means of the relatively simple column-to-beam junction structure. SOLUTION: A corner hardware 3 having a bolt hole 3a tilted relative to the direction of the axis of a steel beam 2 within a horizontal plane is mounted on the outer surface of a corner, of the junction of a steel column 1. A sleeve hardware 4 is mounted on the flanged end of the steel beam 2 in such a manner that the central axis of a bolt member hole 4a in the sleeve hardware 4 can continue with the central axis of a bolt-member hole 3a in the corner metal fitting and that its mating end face can abut to the mating end face of the corner hardware 3 A bolt 6 or a deformed steel bar is passed into the corner hardware 3 and the sleeve hardware hardware 4, and a nut 8 is attached to the end of bolt and fastened to tighten and integrate the corner hardware 3 and the sleeve hardware 4 together.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel column having a closed section such as a box column (square steel pipe), a steel beam having upper and lower flanges such as H-section steel and a web, and the like. And a joint structure between a column and a beam having a closed cross-section to form a rigid frame structure.

[0002]

2. Description of the Related Art FIG. 13A shows a conventional rigid frame structure having a standard beam-column joint. In this structure, as shown in FIGS. 13 (a) and 13 (b), a steel column 1 made of a square steel pipe has an upper column 50, a panel zone 51,
It is cut and divided into lower pillars 52, an upper diaphragm 53 and a lower diaphragm 54 are arranged between the members, integrated by welding, and the upper and lower flanges of the bracket beam 55 are welded to the upper and lower diaphragms 53 and 54, and the bracket beam 55 Is welded to the column side plate, and is manufactured in a factory with the bracket beam 55 protruding from the steel column 1. Also, at the construction site, the flange and the web of the steel beam 2 are joined to the tip of the bracket beam 55 by high-strength bolts using joint plates 56, respectively.

[0003]

However, the above-mentioned conventional joint structure has the following problems.

In order to bridge a steel beam between steel columns, three pieces of left and right bracket beams and a steel beam to be attached on site are required.

[0005] Since a steel column is divided into an upper column, a panel zone, and a lower column and welded with a diaphragm interposed therebetween, the proof strength of the steel column material depends on a welding technique for constructing these welds,
In addition, since an assembly process for matching the axis of the steel column is required, advanced technology is required, and dimensional accuracy control is difficult because the welded portion contracts.

[0006] Because the bracket beam protrudes in four directions in the middle column, three directions in the side columns, and two directions in the corner columns, it is difficult to perform factory welding with the steel columns due to the working posture. There is distortion due to welding of the beam, and it is difficult to control the accuracy to maintain the perpendicularity of the bracket beam to the steel column. Furthermore, the efficiency of transportation from the factory to the site is poor due to the presence of the bracket beams.

[0007] As shown in FIG. 13 (b), since a structure in which many pieces are gathered and fixed by welding, the quality of the welded portion governs the proof stress of the joint where stress is concentrated as a rigid frame structure. Management governs the reliability of this joining method.

Further, at the site, since the intermediate steel beam is joined with a high-strength bolt at the tip of the bracket beam via a joint plate, it is necessary to drill a bolt and ensure accuracy.

[0009] Therefore, many man-hours are required in the factory, and high-strength bolt joining at the site requires careful attention to quality control at the manufacturing stage.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to eliminate the need for cutting a steel column and welding and fixing a diaphragm or a bracket beam as in the related art. A one-piece steel beam can be directly joined to the column, stabilizing the quality of the joint structure and reducing costs. In addition, a relatively simple column-beam joint structure provides sufficient mechanical functions It is an object of the present invention to provide a column-beam joint structure having a closed cross-section capable of forming a satisfactory rigid frame structure.

[0011]

SUMMARY OF THE INVENTION The above-mentioned conventional method has a problem that a steel column is cut, a bracket beam is attached, and a steel beam is connected to a high-strength bolt on site because a diaphragm is required. This is a point where many members need to be assembled (see FIGS. 13 (a) and 13 (b)). In the present invention, FIG.
As shown in (c), the steel column is made into a steel column, and the steel beam to be bridged between the steel column and the steel column has a simple structure consisting of one piece. The purpose is to use a metal joint that can be mass-produced in a factory, improve the processing productivity, and satisfy the mechanical function as a ramen structure.

Therefore, in the present invention, as shown in FIGS. 1 and 2, upper and lower flanges and a web are provided on the side surfaces of a steel column having a closed cross section (a box column made of a square steel pipe, a circular steel pipe column, or the like). In a joint structure for joining the ends of steel beams (H-beams, I-beams, and the like) having the same, the outer surfaces of the corners at the joints of the steel columns are inclined in the horizontal plane with respect to the axial direction of the steel beams. A corner metal having a bolt member insertion hole is attached, and a sleeve metal can be connected to a flange at a joint end of the steel beam so that a center axis of the bolt member insertion hole can be connected to a center axis of the bolt member insertion hole of the corner metal, and a joint end surface thereof. Is mounted so that it can be brought into contact with the joint end face of the corner metal, the bolt member is inserted through the bolt member insertion hole of the corner metal and the sleeve metal, and a nut is attached to the tip of this bolt member and tightened. Kicking it with, characterized by comprising unites with Tightened corner fittings and sleeve fittings (claim 1). Here, it is preferable that the bolt member insertion hole of the corner metal be larger than the bolt member insertion hole of the sleeve metal so as to absorb a manufacturing error of the corner metal or the like. The web at the joint end of the steel beam
The gusset plate fixed to the side plate at the joint of the steel column is directly bolted to the gusset plate, or is bolted via a splice plate.

Through bolts (high strength bolts)
Is used (claim 3). FIG. 1 shows a case of a middle pillar for joining a steel beam to a steel pillar from all sides. A through bolt with a bolt head is inserted from one side into a joining hardware in which sleeve hardware is located on the left and right of the corner hardware. Attach nut to bolt end and tighten. In the case of side pillars and corner pillars, there is no mating sleeve, so the end of the through bolt is fixed directly to the corner fitting with a nut.

Further, a deformed steel rod having a convex projection can be used for the bolt member. In this case, as shown in FIG. 2 (b), the deformed steel bar is inserted into the corner fitting and the sleeve fitting and fastened with nuts from both sides. If there are sleeve hardware on the left and right of the corner hardware, grout material (such as high-strength mortar) or adhesive is filled between the left and right sleeve hardware and the deformed steel bar, and the sleeve hardware is on only one side of the corner hardware in case of,
Between the corner hardware and sleeve hardware and the deformed steel bar,
Fill grout or adhesive. In addition, a method is used in which recesses are provided at predetermined intervals on the inner surface of the sleeve hardware or the corner hardware in which the grout material is filled to enhance the joining effect.

As shown in FIG. 3, the bolt member has its axis center coincident with the intersection O of the plate thickness center line of the steel column, or positioned outside or inside the intersection O.
It is arranged (claim 5). FIG. 3 (a) shows an assembly box column in which the axis of the bolt member is coincident with the intersection O of the plate thickness center line of the column side plate to avoid the generation of secondary stress as described later in detail. In this case, the corners of the steel columns are partially cut out so that the bolt members can be inserted. FIG. 3B shows an example in which the bolt member axis is passed outside the intersection point O. FIG. 3 (c) shows an example in which the bolt axis passes through the inside of the intersection point O, and the corner metal is a tapered washer-shaped metal fixed to a steel column by welding, and is used for a relatively light structure. Fig. 3 (d) is an example of a case where the steel column is a cold-formed square steel pipe and the corner is bent.
The intersection O and the axis of the bolt member are matched. Generally, this bending radius is 2.5 to 2.5 times the thickness t outside the plate.
Since it is 3.5 times, the shaft diameter of the bolt member passing through the intersection point O can be up to 2.2 to 2.9 t.

If the joint strength of the steel columns is insufficient, the joints of the steel columns are reinforced by a reinforcing plate from the outside as shown in FIG. As the reinforcing plate, an L-shaped steel plate or the like may be used and fixed by welding to the outside of the four corners of the steel column, and the corner metal parts may be intensively reinforced as shown in FIG. As shown in FIG. 4 (c), the entire joint may be reinforced by vertically connecting an L-shaped steel plate or the like.

The following can be used for the sleeve hardware. FIGS. 5 to 7 show an example in which a sleeve hardware is fixed to a beam flange surface of a steel frame beam by welding (intervening a leg or a substrate as necessary). FIG.
A leg is provided at the lower portion of the sleeve hardware, and the leg is directly welded to the beam flange surface. The height of the leg is set to a size that allows the nut of the bolt member to be tightened. FIG. 6 is intended to make the leg portion touching the side surface of the beam flange protrude from the lower part of the sleeve hardware, to facilitate the positioning at the time of manufacturing the factory, and to secure the welding length. FIG. 7 shows an example in which a pair of left and right sleeve hardware is integrated by a V-shaped substrate in plan view, and this substrate is fixed to the beam flange surface by welding. Although this figure shows the case of a deformed steel bar, the present invention can be applied to a case of a through bolt.

FIG. 8 shows an example in which a metal sleeve is previously attached to a joining plate by welding, and the joining plate is attached to a beam flange surface of a steel beam and joined by a high-strength bolt. Fig. 8 (a)
Is a steel column is a cold-formed square steel pipe, using a bolt member whose axis is aligned with the intersection O of the thickness center line of the column side plate,
FIG. 8B shows an example in which four corners of a steel column are reinforced from the outside with reinforcing plates made of L-shaped steel plates. In these cases, the sleeve metal and the joining plate are integrated, and after the bolt member is inserted into the corner metal and the sleeve metal and fastened and fixed with a nut, the joining plate and the beam flange are joined by a high-strength bolt.
The surface touch of the joint end surface of the corner metal and the sleeve metal is facilitated, and a slight manufacturing error can be absorbed by the bolt hole of the joint plate and the bolt hole of the beam flange. The joining plate is divided into left and right parts, and the sleeve fittings are attached to each. However, it is also possible to attach the sleeve fittings to the left and right sides of one integrated joining plate.

Further, in the sleeve metal member having the above-described configuration, the sleeve metal member or the joint plate may be disposed on both upper and lower surfaces of the beam flange of the steel beam.
FIG. 9 shows an example in which a bonding plate is used. In this case, since a total of four bolt members are used for the beam flange, the strength of the joint can be increased, and the applicable range of the present invention is expanded. In this case, a two-hole corner metal shown in FIG. 4 (c) may be used as the corner metal. In this case, a bolt member is attached to the inside of the beam flange. Therefore, a bolt fastening hole into which a socket of a fastening device can be inserted is provided in the web of the steel beam.

Incidentally, the cold-formed square steel pipe generally used has plastic regions E formed by cold bending at the four corners (see FIG. 3 (d)). Corner metal fittings according to the present invention
Due to the beam end bending moment, the stress is transmitted by the bearing pressure of the contact surface with the sleeve hardware.

Therefore, since the corner metal gives a supporting pressure and a shearing force to the steel column, when the cold-formed rectangular steel pipe is used for the steel column, it is fixed to the steel column by fillet welding avoiding the plastic region. (See FIG. 3 (d)). Thereby, brittle fracture due to welding from the plastic region can be prevented. Also, when reinforcing plates are welded to the four corners of a steel column, welding is performed while avoiding the plastic region E, but the fillet welding in the axial direction (vertical direction) of the steel column mainly bears stress. (Refer to FIG. 4), it is possible to prevent defects generated in the plastic region.

In the present invention as described above, a corner fitting and a gusset plate for joining a beam web are fixed to a joint portion of a steel column with a beam in advance in a factory by welding.
After the sleeve metal is fixed to the joint end of the steel beam of the piece by welding, or the sleeve metal is fixed to the joint plate by welding, and the joint end faces of the corner metal and the sleeve metal are brought into surface contact with each other. By inserting the bolt member through the bolt member insertion hole of the metal member, and attaching and tightening a nut at the tip of the bolt member, the corner metal member and the sleeve metal member are tied. When a joining plate is used for the sleeve hardware, the joining plate is attached to the beam flange surface at the joining end of the steel beam and joined by high-strength bolts. The gusset plate is fixed to the beam web with high strength bolts or the like.

As described above, according to the present invention, a steel column can be a through column, and a one-piece steel beam can be joined to this through column without a bracket. In addition, it is possible to eliminate the welding and fixing of the diaphragm and the bracket beam, and the bolt connection between the bracket beam and the steel beam at the site. As a result, the number of members and processing man-hours can be significantly reduced, and difficult dimensional accuracy control in welding each member can be eliminated, and the drilling and accuracy of bolts in the bolt connection between the bracket beam and the steel beam can be eliminated. The securing can be eliminated, and the quality of the joint structure can be stabilized and the cost can be reduced. Furthermore, unlike the conventional case, the bracket beam does not protrude from the steel column, and the transportation from the factory to the site is facilitated.

The stress transmission mechanism of the joint structure according to the present invention is as follows, and a rigid frame structure having a sufficient mechanical function can be constructed. FIG. 10 (a)
Is described as a representative case in which a beam is attached to only one side of a steel column in order to show the stress state applied to the beam-column joint. Generally, a bending moment M and a shearing force Q simultaneously act on the beam end. When the steel beam has an H-shaped cross section, the bending moment is mainly borne by the beam flange, and the shear force is borne by the beam web. For the beam flange, the upper and lower flanges are replaced with a tensile force T and a compressive force N, respectively.
Its magnitude is | T | = | N | ≒ M / h. Also,
The shear force is directly high-bolt-joined by the gusset plate fixed to the steel column, so that the shear force Q ₀ = Q transmitted to the steel column.

Now, the mechanism of transmitting stress to a steel column will be described, focusing on the flange. FIG. 10B is a plan view of a beam-column joint according to the present invention. This is a mechanism in which a tensile force is applied to the upper flange, and the bolt is transmitted at point A to the steel column through corner metal fittings on both sides of the steel column. At the point A, the tensile force T is divided into right and left, and if the opening angle is 2θ, the tensile force applied to each bolt member is T / 2 cos θ. The stress applied to the steel column by the corner metal by the tensile force is T / T on the side plate parallel to the steel beam if the intersection B of the thickness center line of the side plate of the steel column and the center line of the bolt member coincide with each other. 2. The force is balanced on the side plate in the direction orthogonal to this as T / 2 × tan θ. That is, each member is balanced only by the axial force.

On the other hand, when the axis of the bolt member does not coincide with the point B, an eccentric bending moment Me is generated as a secondary stress. FIG. 11 shows this state. FIG.
11A, the eccentricity e is outside the steel column, and the secondary eccentric bending moment Me = e × T / 2 cos θ, and FIG.
As shown in (1), an out-of-plane bending moment is applied to the side plate of the steel column. Also, when the eccentricity e is inside the steel column, the mechanical principle is the same and only the direction of Me is reversed.

In the present invention, the axis of the bolt member is B
The reaction force received by the steel column is dominated by the shear force in the panel zone equivalent part,
If the side plate of the steel column withstands this shearing force, it can easily cope with Me as a secondary stress, and a configuration as a ramen structure is possible. By the way, the shear strength of the panel zone can form a ramen structure without any particular reinforcement in the box section. The above-mentioned mechanical principle is the same when the axis of the beam does not coincide with the center of the column.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. 1 and 2 are a plan view and an elevation view of an example in which a joint structure of a closed section column and a beam of the present invention is applied to a center pillar of a building. In FIGS. 1 and 2, the joint structure of the column and the beam of the closed section according to the present invention includes a corner fitting 3 attached to an outer surface of four corners 1 a in a joint of a steel column 1 made of a square steel pipe, and H A sleeve metal member 4 attached directly or via a joint plate 5 or the like to the upper and lower flanges 2a at the joint end of the steel beam 2 having a rectangular cross section;
A joint bolt and a nut 8 such as a through bolt (high-strength bolt) 6 or a deformed steel rod 7 for fastening the corner metal member 3 and the sleeve metal member 4, and a joint end portion of the steel beam 2 attached to the side plate 1a of the steel column 1. And a gusset plate 9 for bolting the web 2b.

The corner fitting 3 has a bolt insertion hole 3a formed therein at an angle of, for example, 45 ° with respect to the axial direction of the steel beam 2 in a horizontal plane. And fixed to the outer surface of the corner 1a by welding. The sleeve metal member 4 is directly fixed to the outer surface of the flange 2 a by welding so that the bolt insertion hole 4 a is continuous with the bolt insertion hole 3 a and the joint end surface is in contact with the joint end surface of the corner metal member 3. Is fixed by welding to the outer surface.

The through bolt 6 is a bolt with a bolt head. The through bolt 6 is inserted through the bolt insertion hole 3a of the corner metal member 3 and the bolt insertion hole 4a of the sleeve metal member 4. , Corner hardware 3
And the sleeve hardware 4 are tied. When using a deformed steel bar 7 having a convex protrusion, as shown in FIG. 2B, recesses are provided at predetermined intervals on the inner surface of the bolt insertion hole 4a of the sleeve metal member 4, and both ends of the deformed steel bar 7 are provided. Then, a washer 11 and a nut 8 are attached thereto and tightened, and a grout material 13 or an adhesive is filled in the inside from one of the filling hole 12 and the filling hole 12.

Due to the unevenness of the deformed steel bar 7 and the sleeve hardware 4, the withdrawal strength of the steel bar is improved. In addition, sleeve hardware 4
The opening on the side of the metal fitting 3 is closed with the packing material 14.

FIG. 3 shows an example of the corner metal piece 3. As shown in FIGS. 3 (a) and 3 (d), the axis of the bolt member is aligned with the thickness center line of the side plate 1b of the steel column 1. 3B and 3C, the axis of the bolt member passes outside or inside the intersection O. FIG.
In (a), a corner metal 3 having a notch corresponding to the corner 1a of the steel column 1 is fixed by welding 10 using a corner metal 3, and a notch through which a bolt member can be inserted is provided in the corner 1a of the steel column.
Alternatively, after fixing the corner metal member 3 by welding 10, the bolt insertion hole 3a is also continuously formed in the corner portion 1a. FIG.
In (b), a bolt insertion hole 3a may be provided outside the corner metal piece 3 having the notch. In FIG. 3 (c), a taper washer-shaped corner metal piece 3 is fixed to the adjacent side plate 1b by welding 10, and a bolt insertion hole 3a is also formed in the side plate 1b.
Are continuously drilled. This applies to relatively light structures. FIG. 3 (d) shows a case where a cold-formed square steel pipe is used for the steel column 1. A corner metal 3 similar to that shown in FIG. 3 (b) is used, and the intersection O and the axis of the bolt member are aligned. In this case, welding 10 is performed while avoiding the plastic region E of the corner 1a.

As shown in FIG. 4, when the strength of the joint of the steel column 1 is insufficient, the steel column 1 is reinforced from the outside.
The reinforcing plate 15 is, for example, an L-shaped steel plate such as an angle material,
The four corners of the steel column 1 are reinforced. The reinforcing plate 15 is fixed to the steel column 1 by welding 10, and the corner metal 3 is placed on the reinforcing plate 15.
Is fixed by welding 10. The reinforcing plate 15 may intensively reinforce the corner fitting 3 or may be vertically continuous. When the steel column 1 is a cold-formed rectangular steel pipe whose corner is bent, the steel column 1 and the reinforcing plate 15 are welded to avoid the plasticized region E at the corner of the steel column 1.

The sleeve hardware 4 shown in FIGS. 5 to 8 is used. In FIG. 5, a leg 16 having such a height that the nut 8 of the bolt member can be tightened is provided at the lower portion of the sleeve metal member 4, and the leg 16 is directly fixed to the beam flange surface by welding 10. In FIG. 6, the leg 16 is projected from the lower part of the sleeve hardware 4, the side surface of the leg 16 is touched to the side surface of the beam flange, and is fixed by welding 10. In this case, positioning at the time of factory production becomes easy, and the welding length can be ensured. In FIG.
A pair of left and right sleeve hardware 4 are integrated with a V-shaped substrate 17 in plan view, and the substrate 17 is fixed to the beam flange surface by welding 10.

In FIG. 8, the sleeve metal member 4 is previously joined to the joining plate 5.
The joining plate 5 is joined to the beam flange surface with a high-strength bolt 18. Joining plate 5
The side plate 1b of the steel column 1 is provided so that the joint end surface of the sleeve metal member 4 can touch the joint end surface of the corner metal member 3.
Alternatively, it is formed so as not to hit the reinforcing plate 15.

When such a joint plate 5 is used, the sleeve metal member 4 and the joint plate 5 are integrated, a bolt member is inserted through the corner metal member 3 and the sleeve metal member 4 and the nut member 8 is tightened and fixed. The beam flange 2a and the beam flange 2a are joined by high-strength bolts, so that the surface of the joint end face between the corner metal member 3 and the sleeve metal member 4 can be easily touched.
And the bolt holes in the beam flange 2a. Although the joining plate 5 is divided into right and left, it may be a single joining plate 5 of an integral body.

The above is an example in which the sleeve metal member 4 is provided only on the outer surface of the beam flange. However, the present invention is not limited to this, and the sleeve metal member 4 may be provided on both the upper and lower surfaces of the beam flange 2a as shown in FIG. Can also. In this case, as shown in FIG. 4 (c), a two-hole corner metal member 3 having bolt insertion holes 3a formed vertically is used, and a socket of a fastening device can be inserted into the web 2b of the steel beam 2. A hole 19 for bolting is formed in advance. Since a total of four bolt members are used for each of the upper and lower beam flanges 2a, it is possible to increase the strength of the joint.

In the above joint structure, the stress transmission mechanism is as described above. The assembly of a steel frame having such a joint structure at a construction site is performed in the following procedure. Note that this is a case in which a metal joint with a joint plate is used and the joint ends of the steel beams are joined with four bolt members.

(1) In a factory, the corner fitting 3 and the gusset plate 9 are fixed to the joint of the through-steel column 1 by welding, and such a through-steel column 1 is transported to the site and built at a predetermined position. Also, at the factory, the sleeve hardware 4
Is fixed to the joining plate 5 by welding to produce the sleeve metal member 4 with the joining plate.

(2) The web 2b of the steel beam 2 is temporarily fixed to the gusset plate 9 protruding from the steel column 1 with a high-strength bolt or the like, and the steel beam 2 is bridged between the steel columns 1 and 1. Similarly, the steel beams 2 in the orthogonal direction are also bridged.

(3) A sleeve metal member 4 with a joint plate is temporarily fixed to the beam flange 2a at the joint end of the steel beam 2 with temporary bolts.

(4) The bolts 6 and the like are inserted through the corner metal parts 3 and the sleeve metal parts 4 where the joint ends are touched to each other, and the nut 8 attached to the bolt tips is tightened. Tighten.

(5) The joining plate 5 of the sleeve metal member 4 is permanently joined to the beam flange 2a with a high-strength bolt. Finally, beam web 2
b and the gusset plate 9 are permanently joined with high strength bolts.

If the joint plate 5 is used, the end surface of the joint between the corner metal member 3 and the sleeve metal member 4 can be easily touched, and slight manufacturing errors can be absorbed by the bolt holes of the joint plate 5 and the bolt holes of the beam flange 2a. Can be. When the joining plate 5 is not used, at the factory, the sleeve metal member 4 is fixed to the joining end of the steel beam 2 by welding via a leg portion or a board,
Through bolt 6 in corner metal 3 and sleeve metal 4
The joining operation is completed only by inserting and fastening. The sleeve metal member 4 without such a joining plate has an extremely simple shape, and the joining operation becomes easy. In this case, the sleeve metal member 4 is manufactured to be short so that the end surface of the joint between the corner metal member 3 and the sleeve metal member 4 can be reliably touched, and a tamper plate such as a washer is provided between the corner metal member 3 and the sleeve metal member 4. Is preferably interposed.

Further, in order to ease the dimensional accuracy of the corner metal member 3 and facilitate the insertion of the bolt member, the bolt insertion hole 3a of the corner metal member 3 is enlarged. Even if the bolt insertion hole is large, stress is not transmitted from the contact portion between the bolt member side surface and the bolt insertion hole side surface in the present invention, so that there is no problem in increasing the bolt insertion hole 3a.

Although the above description has been made with reference to a steel column made of a square steel pipe and a steel beam made of an H-shaped steel, the present invention is not limited to this, and a joint between a steel column having a closed cross section and a steel beam having upper and lower flanges and a web is provided. For example, it is needless to say that the present invention can be applied to a case where the steel column shown in FIG. 12 is a circular steel tube column.

[0047]

Since the present invention has the above-described configuration, the following effects can be obtained.

(1) It is possible to eliminate the conventional cutting of a steel column, welding and fixing of a diaphragm and a bracket beam, and bolt connection between a bracket beam and a steel beam at a site, as in the related art.
A rigid frame structure can be constituted by the through steel column and the one-piece steel beam. As a result, the number of members and processing man-hours can be significantly reduced, and difficult dimensional accuracy control in welding each member can be eliminated, and the drilling and accuracy of bolts in the bolt connection between the bracket beam and the steel beam can be eliminated. Secure can be eliminated. Furthermore, the through beam and the one-piece steel beam need only be transported from the factory to the site without the bracket beam protruding from the steel column as in the related art, so that there is an advantage that the transport operation is easy.

(2) A steel column having a closed cross-section and a steel beam having an H-shaped steel cross section can be bonded by four connecting parts of a corner metal, a sleeve metal, a bolt member, and a gusset plate for connecting a beam web. A ramen structure having a sufficient mechanical function can be realized in the simplest form. In addition, reinforcing plates are provided at the four corners of the steel column as necessary, and joint plates are used for the sleeve hardware. However, even if these optional members are used, the simplest structure of the ramen structure intended for the present invention can be used. There is no loss.

(3) As described above, based on the idea of the present invention that the welded portion does not become a critical point of proof stress,
Joining elements such as corner metal fittings, sleeve metal fittings, bolt members, nuts for fixing the same, and filling of high-strength mortar grout material are integrated, and the manufacturing process is also integrated. This means consolidation of quality control points at factories and construction sites, and the drastic reduction in manufacturing man-hours compared to the conventional method means stabilization of quality. You have opened the way.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a joint structure between a closed column and a beam according to the present invention.

2 (a) is an elevation view of the joint structure of FIG. 1, and FIG. 2 (b) is a cross-sectional view showing an example in which a deformed steel rod is used for a bolt member.

FIG. 3 is a plan view showing various aspects of a corner metal used in the present invention.

4 (a) is a plan sectional view, and FIGS. 4 (b) and 4 (c) are elevation views showing reinforcement of a steel column in the joint structure of the present invention.

FIG. 5 shows an example of a sleeve hardware used in the present invention.
(a) is a plan view, and (b) is a cross-sectional view.

FIG. 6 shows another example of the sleeve hardware used in the present invention.
(a) is a plan view, and (b) is a cross-sectional view.

FIG. 7 is a plan view showing an example in which a substrate is used in a sleeve metal used in the present invention.

FIG. 8 is a plan view and a side view showing an example in which a joining plate is used in a sleeve metal used in the present invention.

9 (a) is a plan view, FIG. 9 (b) is an elevation view, and FIG. 9 (c) is a cross-sectional view showing an example in which sleeve hardware used in the present invention is provided on both upper and lower surfaces of a beam flange.

10A and 10B are elevation views and FIG. 10B is a plan view showing force transmission in the present invention.

FIG. 11 is a plan view showing transmission of force when the bolt member according to the present invention is eccentric from the corner of the column.

FIG. 12 shows a joint structure between a closed section column and a beam according to the present invention;
It is a top view which shows the example which used the steel column as the circular steel pipe column.

FIG. 13 (a) is an elevation view showing a conventional rigid frame structure with a standard beam-column joint, FIG. 13 (b) is an assembly diagram of the conventional rigid frame structure, and FIG. 13 (c) is a beam-column joint according to the present invention. It is an elevation view showing a ramen configuration.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Steel column 1a ... Corner part 1b ... Side plate 2 ... Steel beam 2a ... Upper and lower flange 2b ... Web 3 ... Corner hardware 3a ... Bolt insertion hole 4 ... Sleeve hardware 4a ... Bolt insertion hole 5 ... Joint plate 6 ... Through bolt 7 ... Deformed steel bar 8 Nut 9 Gusset plate 10 Welding 11 Washer 12 Filling hole 13 Grout material 14 Packing material 15 Reinforcement plate 16 Legs 17 Substrate 18 High-strength bolt 19 Bolt tightening hole

Claims (9)

[Claims] 1. A joint structure for joining an end of a steel beam having upper and lower flanges and a web to a side surface of a steel column having a closed cross section, wherein a steel frame is provided at a corner portion at a joint of the steel column in a horizontal plane. A corner metal having a bolt member insertion hole inclined with respect to the axial direction of the beam is attached, and a sleeve metal is attached to the flange at the joint end of the steel beam, and the center axis of the bolt member insertion hole is the center axis of the bolt member insertion hole of the corner metal. And a joint end face of the corner metal and the sleeve metal can be brought into contact with the joint end face, and a bolt member is inserted into a bolt member insertion hole of the corner metal part and the sleeve metal part, and a nut is attached to a tip end of the bolt member and tightened. Thus, the joint structure of the column and the beam having a closed cross section is characterized in that the corner hardware and the sleeve hardware are tightly integrated. 2. The closed column / beam joint structure according to claim 1, wherein the web at the joint end of the steel beam is attached to a gusset plate fixed to a side plate at the joint of the steel column. The joint structure of the column and the beam of the closed section characterized by the following. 3. The joint structure between a closed column and a beam according to claim 1 or 2, wherein the bolt member is a through bolt. 4. The joint structure of a closed column and a beam according to claim 1, 2 or 3, wherein the bolt member is a deformed steel rod, and a grout material or an adhesive is attached to the sleeve hardware. Closed section column and beam joint structure characterized by being filled. 5. The joint structure of a column and a beam having a closed section according to claim 1, 2, 3, or 4, wherein the bolt member has its axis centered at the thickness center of the steel column. A joint structure between a column and a beam having a closed cross section, which is arranged so as to coincide with an intersection of the lines or to be located outside or inside the intersection. 6. In the joint structure of a closed section column and a beam according to claim 1, 2, 3, 4, or 5, a joint of a steel column is optionally provided. Closed section column and beam joint structure characterized by reinforcement with a reinforcing plate from the outside. 7. The joint structure between a column and a beam having a closed cross section according to claim 1, 2, 3, 4, 5, or 6, wherein the metal sleeve is a steel beam. A joint structure between a closed column and a beam, which is fixed to the flange surface of the beam by welding. 8. The joint structure of a column and a beam having a closed section according to claim 1, 2, 3, 4, 5, or 6, wherein the sleeve metal member is a joint plate. And the joint plate is attached to the beam flange surface of the steel beam and is bolted to the joint beam, and the joint structure of the column and the beam having a closed cross section is provided. 9. The joint structure between a closed column and a beam according to claim 7 or 8, wherein a sleeve metal member or a joint plate is provided on both upper and lower surfaces of a beam flange of a steel beam. Closed section column and beam joint structure.