JPH1161993A - Connecting structure of closed type sectional column and beam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute a rigid frame structure, in which conventional diaphragm, bracket, etc., need not be welded and fixed, a steel-frame beam in one piece can be joined directly with a steel-framed column, the quality of connecting structure is stabilized and cost is reduced, simple structure may be formed even when steel-framed beams having different beam depth are installed to the steel-framed column, and a dynamical function can also be satisfied sufficiently by comparatively simple connecting structure, in the connecting-section structure of the closed type sectional column and the beam. SOLUTION: Column-sleeve metal fittings 3 are fixed onto both side faces of the steel-framed column 1 by welding, beam-sleeve metal fittings 4 are fastened at the beam ends of a steel-framed beam 2 through beam-flange gusset plates 5, the joining end faces of the sleeve metal fittings 3, 4 are fast stuck mutually, and inserting bolts 6, etc., are inserted to these sleeve metal fittings 3, 4 and clamped by nuts 7. Alternatively the bolts 6 inserted to the beam-sleeve metal fittings 4 are screwed and clamped to the column-sleeve metal fittings 3, and the column-sleeve metal fittings 3 and the beam-sleeve metal fittings 4 are tightened firmly, and a rigid column-beam connecting section is formed.

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 square steel pipe or a circular steel pipe, and a steel beam having upper and lower flanges such as H-section steel and a web in a steel structure for civil engineering or construction. The present invention relates to a joint structure of a column having a closed cross-section and a beam, which is joined by using a joint metal and a bolt member to form a rigid frame.

[0002]

2. Description of the Related Art A conventional method of connecting a column and a beam having a closed cross section employs a method using an outer diaphragm (ring stiffener) as shown in FIG.
In this conventional method, a horizontal diaphragm (ring stiffener) 50 is provided so as to surround the steel column 1 from the outside at the mounting level of the upper and lower beam flanges of the steel beam 2 in the steel column 1 made of a rectangular steel pipe, and the inner peripheral portion thereof is formed of a steel frame. The web 51 is fixed to the side plate of the column 1 by welding, and a web 51 is provided between the upper and lower diaphragms projecting toward the steel beam 2, and the web 51 is fixed to the side plate of the steel column 1 and the upper and lower diaphragms by welding. The tip of this protruding portion has the same cross section as the H-shaped beam, the upper and lower beam flanges and the beam web of the steel beam 2 are butted together, and high-strength bolted using the joint plate 52 to form a ramen structure composed of the steel column and the steel beam. doing.

FIG. 12 shows an example of this method with respect to a corner post. A horizontal diaphragm 50 is composed of steel plates 50a and 50b divided into four parts so as to be attached to the steel column 1.
These steel plates are welded to the side plates of the steel column 1, and the steel plate 50a to which the steel beam 2 is attached is formed as a horizontally projecting horizontal diaphragm, and the web 51 is welded between the upper and lower diaphragms to form a so-called bracket. A bracket comprising the diaphragm 50a and the web 51 and the horizontal diaphragm 50b are integrated with the steel column 1 at a factory. At the construction site, the upper and lower beam flanges and the beam web of the steel beam 2 are joined to the tip of a bracket integrally projecting from the steel column 1 by using a joint plate 52 with high strength bolts.

[0004]

However, the conventional method using the outer diaphragm as described above has the following problems.

[0005] The brackets that protrude integrally from the steel column have a long protruding length, resulting in poor transport efficiency. In addition, since the weight is heavy, handling at the time of construction on a construction site is not easy.

[0006] Since a large number of pieces are assembled by welding to produce a horizontal diaphragm and a bracket composed of the horizontal diaphragm and the web, welding distortion is generated, and correction is made.
Man-hours for production and management at the factory, such as compensation, increase.

[0007] Since the outer diaphragm needs to be disposed at the positions of the upper and lower beam flanges of the steel beam, the beams of the steel beams gathering on the steel column need to be unified, which restricts the design of the frame member. When attaching steel beams of different beam types to a steel column, it is necessary to provide a plurality of lower diaphragms corresponding to lower beam flanges of different levels, resulting in an extremely complicated joint between columns and beams.

[0008] For joining the tip of the bracket and the end of the H-shaped beam, a large number of high-strength bolts are required together with the joint plate, and much labor such as drilling and tightening management is required.

[0009] In order to bridge a steel beam between steel columns, a bracket is required for both columns and an intermediate steel beam is required in the middle, and the number of joints increases. It can be called an issue.

The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to eliminate the need for a conventional method of fixing a diaphragm or a bracket to a steel column by welding or the like. The steel beams of the pieces can be directly joined, stabilizing the quality of the joint structure and reducing costs, and a simple structure is also possible when attaching steel beams of different beams to a steel column. An object of the present invention is to provide a joint structure between a column and a beam having a closed cross section, which can form a rigid frame structure that can sufficiently satisfy a mechanical function by a relatively simple joint structure.

[0011]

The bending moment at the beam end at the joint between the steel column and the steel beam acts on the upper and lower beam flanges as a couple of a tensile force and a compressive force, as shown in FIG. 11 (a). This stress is transmitted to the panel zone of the steel column (the shaded portion in the figure), so that the joint between the steel column and the steel beam can be a joint of the rigid frame. As a method for this purpose, a conventional joint employs a method called an outer diaphragm type in which a horizontal diaphragm is provided inside a pillar or a diaphragm (synonymous with a horizontal stiffener, see FIG. 12) is provided outside the pillar. In the present invention, the stress of the upper and lower beam flanges at the beam ends is transmitted directly to the panel zone of the steel column without providing these horizontal diaphragms.

For this purpose, it is necessary to transmit the tensile force or the compressive force of the upper and lower beam flanges to the panel zone of the steel column with the simplest structure. In the present invention, as shown in FIGS. Joints for joining the ends of steel beams (H-shaped steel, I-shaped steel, etc.) with upper and lower flanges and webs to the sides of a steel column with a cross section (eg, box column made of square steel pipe or circular steel pipe column) In the structure, on both sides of the steel column and on both sides in the width direction of the beam flange, a column sleeve metal member and a beam sleeve metal member are fixed so that their joining end surfaces can be in close contact with each other, and a bolt member is inserted through the column sleeve metal member and the beam sleeve metal member. And tightened with a nut (claim 1).

In general, since the beam flange width is smaller than the column width, a projecting plate is fixed to both sides of the beam flange to take out the beam sleeve hardware to the position of the column sleeve hardware, or 1. As shown in FIG. 2, a beam sleeve hardware is fixed to a beam flange gusset plate, and the beam flange gusset plate is attached to a beam flange and fixed by bolting or welding (claim 2). The beam flange gusset plate and the beam sleeve hardware may be fixed by welding or may be manufactured by integral molding. The beam flange gusset plate may be provided as a single piece and provided with beam sleeve hardware at both ends in the beam width direction. Alternatively, as shown in FIG. Good.

Since a shear force acts on the beam end simultaneously with the bending moment, the gusset plate fixed to the side plate of the steel column is bolted to the beam web. The bolt member uses a through bolt (high-strength bolt) (claim 4). A deformed steel rod having irregularities may be used for the bolt member (claim 5). In this case, as shown in FIG. 10, the deformed steel bar is inserted into the column sleeve hardware and the beam sleeve hardware and fastened with a nut. Grout material (high strength mortar, etc.) between sleeve hardware and deformed steel bar
Or fill with adhesive. In addition, a method is used in which irregularities are provided at predetermined intervals on the inner surface of the column sleeve hardware or the beam sleeve hardware to be filled with the grout material to enhance the joining effect. Further, as shown in FIG. 6, a female screw may be provided inside the pillar sleeve hardware, and a bolt member inserted through the beam sleeve hardware may be screwed and fixed to the female screw (claim 6).

In the structure of the present invention as described above, the column sleeve hardware and the beam sleeve hardware provided on both sides of the steel column and both sides in the beam width direction of the steel beam are tightened by the insertion bolts and nuts. It is only necessary to fix the column sleeve hardware to the steel column by welding, so that the bracket does not protrude greatly from the steel column unlike the conventional case, and the weight of the steel column does not increase. Furthermore, unlike the conventional case, many pieces are not gathered on a steel column by welding, and problems caused by welding can be greatly reduced.

Further, since the steel column and the steel beam are directly joined by the sleeve hardware, many joint plates and high-strength bolts are not required as in the related art, and many joints (steel column and bracket, Brackets and intermediate beams) are not required.

Further, the present invention has the following advantages. That is, in general, a steel frame is attached to a building frame as shown in FIG. 2A from the arrangement of steel columns. In addition, in general, a plurality of steel beams to be attached are generally set so that the upper and lower beam flanges are at the same level, but this is because the conventional method requires a horizontal diaphragm at the beam flange position. This is to prevent the horizontal diaphragm from becoming multi-stage by changing.
In the present invention, unlike the conventional method of transmitting stress to the horizontal diaphragm and transmitting the transmitted stress to the panel zone, the sleeve metal fixed to the column side and the beam side and the insertion bolt directly. There is no restriction on the beam of the steel beam that collects on the steel column to transmit the stress to the panel zone. However, the upper beam flange is usually at the same level because the floor slab is laid.

In the present invention, three cases shown in FIG.
Also, it is possible to provide a joint structure between a column and a beam that can be applied even when the beams of a plurality of steel beams are different from each other. Figs. 2 (b) to 2 (d) show examples in which steel beams with different beam joints are joined to the corner pillars. Column sleeve hardware is arranged and fixed at the beam sleeve hardware positions of the lower beam flanges of different levels. do it. The column sleeve hardware corresponding to the upper beam flange is
What is necessary is just to dispose vertically and arrange | position to the beam flange gusset plate so that the insertion bolts arrange | positioned orthogonally from x and y both directions may not mutually interfere, and what is necessary is just to fix to the side plate of a steel column.

Another object of the present invention is to apply from middle to low rise to high rise buildings. There are various types of columns and beams to be applied, from small to large. Therefore, FIG.
As shown in (b) to (d), column width A and beam flange width B
Prepare a beam flange gusset plate whose dimensions are adjusted according to, and use a beam sleeve hardware fixed to both ends.

As shown in FIG. 3 (a), the column sleeve hardware may have a length extending over the entire width of the side plate of the steel column. The cross-sectional shape of the pillar sleeve metal can be various shapes as shown in FIG. Further, as shown in FIG. 4, the pillar sleeve hardware provided at the intersection corner may be an L-shaped hardware. This hardware can be of a type having one insertion bolt in the x and y directions, a type having two x directions and one y direction, and a type having two insertion bolts in both the x and y directions. . Further, as shown in FIG. 5, it is also possible to adopt a type in which a sleeve hardware for welding and fixing to a steel column is connected to and fixed to the cross hardware. Further, as shown in FIG. 6, a female thread may be provided inside the pillar sleeve hardware to eliminate the need for a nut.

In order to prevent the insertion bolts in the x-direction and the y-direction from interfering with each other, as shown in FIG. 7, the position and number of the beam sleeve hardware in the x-direction and the y-direction are as shown in FIG. It can be an embodiment. Further, the shape of the beam sleeve hardware can be shaped as shown in FIG.

A description will be given of a stress transmission mechanism in the joint structure having the above configuration. As shown in FIG. 11A, a bending moment M and a shearing force Q act on the beam end simultaneously.
M acts as an axial force T or N at the beam flange position, and is positive and negative during an earthquake, so that T and N are reversed. Shearing force is transmitted directly from the gusset plate fixed to the steel column to the steel column. The following describes how the tensile force T of the beam flange is transmitted to the steel column by the stress process (see FIGS. 11B and 11C).

The tensile force T applied to the beam flange is transmitted to the beam flange gusset plate by the high-strength bolt A. The transmitted tensile force T is divided by T / 2 on both sides, and transmitted to the beam sleeve hardware 4 by the shear strength of the portion B. The beam sleeve fitting 4 is in surface contact with the end surface of the column sleeve fitting 3, and the nut 7 of the C portion is inserted into the insertion bolt 6.
As a result, the column sleeve fitting 3 and the beam sleeve fitting 4 are rigidly joined. The tensile force T at the beam end is distributed to the column sleeve hardware 3 by T / 2, and the stress is transmitted to the panel zone of the steel column by the shearing strength of the welding E between the column sleeve hardware and the column side plate, and is transmitted to the steel column. The steel beam will be rigidly fixed. Also, when using a column sleeve hardware having a female thread formed therein as shown in FIG. 6, the insertion bolt is screwed into the female screw and tightened.
Shear force transmitted to the panel zone of the steel column. When subjected to seismic forces, tensile forces may act on the lower beam flange. Also in this case, the stress is transmitted to the steel column by the mechanism described above.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. FIG. 1 shows a basic configuration of a joint structure between a column and a beam having a closed cross section according to the present invention. FIG. 2 shows types of column / beam joints in a building and an example in which the joint structure of the present invention is applied to a corner post.

In FIGS. 1 and 2, the joint structure of the closed column and the beam according to the present invention is formed on the outer surfaces of both side plates 1a and 1a parallel to the beam axis direction of the joint of the steel column 1 made of a square steel pipe. Column sleeve hardware 3 horizontally fixed at a pair of flange positions
And a beam-sleeve fitting 4, which is horizontally attached via a beam-flange gusset plate 5 to the upper and lower beam flanges 2a at the joint end of the steel beam 2 having an H-shaped cross section, and the column-sleeve fitting 3 and the beam-sleeve fitting 4 are tightly connected. Gusset plate 8 and the like, which are fixed by welding to an insertion bolt (high-strength bolt) 6 and a nut 7 and a side plate 1 a of the steel column 1 facing the steel beam 2 and bolt the beam web 2 b at the joint end of the steel beam 2. It is composed of

In FIG. 1, the column sleeve metal member 3 is arranged so that the vertical position thereof coincides with the vertical position of the beam sleeve metal member 4, and the tip of the column sleeve metal member 3 is moved from the steel column 1 to the steel beam 2 side. And fixed by welding so as to protrude. The beam sleeve fitting 4 is fixed to both ends of the beam flange gusset plate 5 by welding so that the horizontal position of the beam sleeve fitting 4 coincides with the horizontal position of the column sleeve fitting 3. Thus, when the steel beam 2 is abutted against the side surface of the steel column 1, the center line of the bolt insertion hole of the column sleeve metal member 3 and the beam sleeve metal member 4 is horizontally continuous, and the joint end faces are in surface touch. become.

FIGS. 2 (b) to 2 (d) show a case where steel beams 2 having different beam widths and beam widths are joined at the corner pillars shown in FIG. 2 (a). Provides a beam sleeve fitting 4 in the x direction on a beam flange gusset plate 5 and a beam sleeve fitting 4 in the y direction below the beam flange gusset plate 5, while the column sleeve fitting 3 in the x direction and the y direction The column sleeve hardware 3 is disposed and fixed so as to cross up and down corresponding to the beam sleeve hardware 4. In the lower beam flanges located at different levels, the column sleeve hardware 3 may be vertically displaced and fixed in correspondence with the beam sleeve hardware 4 having different vertical positions.
Note that the beam sleeve metal member 4 and the beam flange gusset plate 5 are used by inverting the same one in the upper and lower beam flanges.

The beam flange gusset plate 5 has a column width A
And the size corresponding to the beam flange width B,
It is fixed to the beam flange 2a by high-strength bolt bonding or welding. The beam sleeve hardware 4 is fixed to both ends of the beam flange gusset plate 5 in the beam width direction by welding. Alternatively, the beam sleeve hardware 3 and the beam flange gusset plate 5 may be integrally formed. Further, as shown in FIG. 9 (a), it may be divided into two right and left parts. Further, although not shown, projecting plates are added to both side surfaces of the beam flange 2a, the beam sleeve hardware 4 is fixed to the end of the projecting plate, and the beam sleeve hardware 4 is taken out to the position of the column sleeve hardware 3. Is also good.

As shown in FIGS. 1 and 2, the insertion bolt 6 is inserted from the steel column 1 side into the bolt insertion hole 3 of the column sleeve hardware 3.
a and the bolt 7 is inserted into the bolt insertion hole 4a of the beam sleeve fitting 4 and screwed and tightened with a nut 7 at the tip end, or as shown in FIG. 6, the insertion bolt 6 is inserted from the beam sleeve fitting 4 side, The column sleeve metal member 3 and the beam sleeve metal member 4 are tightened by being screwed into the female screw 3b inside the column sleeve metal member 3.

As shown in FIGS. 3 to 6, various types of pillar sleeve hardware 3 can be used. FIG.
(a) is an example in which a column sleeve fitting having a length extending over the entire width of the steel column 1 is shown. In this case, the length of the insertion bolt 6 is such that the left and right steel beams 2 can be tightened by one. FIG. 3 (b)
It shows various cross-sectional shapes of the column sleeve metal member 3, and may be a closed cross-sectional shape having a bolt insertion hole 3a such as a circle or a one-sided open cross-sectional shape having a bolt insertion groove 3a '.

As shown in FIG. 2, when two steel beams 2 are mounted to cross each other, the horizontal levels of the upper beam flanges 2a need to be matched with each other. The sleeve metal members 3 are arranged to be shifted up and down. In this case, the two pillar sleeve metal members 3 may be fixed to the adjacent side plates 1a by welding, respectively, or as shown in FIG. , L-shaped pillar sleeve hardware 3 ′. This L-shaped pillar sleeve metal part 3 ′ may be formed by combining two metal parts and integrating them by welding, or by integral molding. In this case, the length of one side is
And a welding length L commensurate with the tensile strength of the steel is obtained.

As shown in FIG. 4 (b), the L-shaped column sleeve fitting 3 'has a structure in which one insertion bolt in the x direction and the y direction orthogonal to each other is inserted. A structure having two y-directions or a structure having two insertion bolts in both the x-direction and the y-direction can be employed. These can be selected according to the stress at the beam end. The shape of these hardware may be a square shape or a shape with rounded corners as illustrated. Further, the shape is such that the bolt insertion holes in the x and y directions are close to each other, and the bolt insertion hole in the other direction is located between the bolt insertion holes in one direction. This L
The character-shaped column sleeve hardware 3 ′ can hold the positions of the insertion bolts 6 orthogonal to each other and can fix the column to the steel column 1 with assured accuracy. The welding length L
When the length is insufficient, the column sleeve metal (guide metal) 3 shown in FIG. 3 (b) can be connected and fixed to increase the joint strength between the steel column 1 and the L-shaped column sleeve metal 3 '.

FIG. 5 shows that a column sleeve metal part 3 for welding and fixing to a steel column 1 is welded and fixed to an intersection metal part 3 ″ in which only the crossing corner part of the column sleeve metal part is integrally formed. This shows an example in which two insertion bolts 6 are inserted in both the x direction and the y direction. In the case of this intersection metal part 3 ″, a simple structure can be achieved, and mass production is easy. There are advantages.

FIG. 6 shows an example in which a female screw 3b is provided inside the column sleeve metal member 3. The tip of an insertion bolt inserted into the beam sleeve metal member from the steel beam side is screwed and fixed to the female screw 3b. This pillar sleeve metal part 3 is an intersection metal part having a simple structure similar to that shown in FIG. 5, and a substrate 3 c for fixing to the steel column 1 by welding is integrally provided. The substrate 3c may be provided with ribs 3d for reinforcement. These pillar sleeve hardware 3, substrate 3c, and rib 3d can be integrally formed at a factory. Although an example has been described above in which the substrate is fixed to the column side plate, the column sleeve hardware itself having the female screw may be directly welded to the column side plate.
The use of such a column sleeve metal has advantages that the nut can be omitted, the bolt length can be shortened, and the shape of the sleeve metal can be made compact.

As shown in FIGS. 7 and 8, various types of beam sleeve hardware 4 can be used. FIG. 7 is an arrangement example showing the positional relationship of the beam sleeve hardware 4 in the x direction and the y direction for preventing the insertion bolts 6 in the x direction and the y direction (see FIG. 5) from interfering with each other. It is to be noted that this is an example of the arrangement when the beams in the x and y directions are equal.
Further, in the case where the insertion bolts 6 in the x direction and the y direction are each one A on one side of the upper beam flange (four x direction, y
4 directions), a case of two Bs each (eight lines in the x direction, eight directions in the y direction), and two and one case of C and D (eight lines in the x direction, four lines in the y direction). . The strength, that is, the bolt shaft diameter and the number of the insertion bolts 6 are selected according to the required bending strength of the steel beam 2.

In the case of FIG. 7A, the A type beam sleeve hardware 4 of FIG. 8 is used. In the A type, the beam flange gusset plate 5
The beam sleeve 4 is eccentrically fixed to the upper side.
Alternatively, the front end of the beam flange gusset plate 5 is bent upward, and the center line of the plate thickness is aligned with the bolt core and fixed. In the y direction with respect to the x direction, the beam sleeve hardware 4 is used in an inverted manner.

In the case of FIG. 7B, a B-type beam sleeve hardware 4 'of FIG. 8 is used. In the B type, bolt insertion holes 4a are formed above and below a vertically long metal part, and the center position thereof is eccentrically fixed to the beam flange gusset plate 5 of the upper and lower beam flanges 2a. y to x direction
The direction is used by inverting the beam sleeve hardware 4 ′. Also,
Since one insertion bolt 6 in the y direction passes between the upper and lower insertion bolts 6 in the x direction, the thickness between the upper and lower bolt insertion holes 4a is equal to or larger than the bolt shaft diameter.

[0038] In the case of C in FIG. 7, a C ₁ type of beam sleeve hardware 4 "in FIG. 8 in the x direction, in .C ₁ type using a C ₂ types of beams sleeve hardware 4 in the y direction, of the longitudinal and below the hardware drilled bolt insertion holes 4a, in .C ₂ types of fixing to coincide with the thickness center line of the center position in the beam flange gusset plate 5, the bolt core beams sleeve fittings 4 beam flange fixed to match the thickness center line to the gusset plate 5. in this case also, the thickness between the upper and lower bolt holes 4a of C ₁ type of beam sleeve hardware 4 "is the bolt axis larger than the diameter perpendicular .

In the case of FIG. 7D, the bolt arrangement is the same as in the case of FIG. 7C, but the D-type beam sleeve hardware 4 of FIG. 8 is used. In this D type, the beam flange gusset plate 5 is divided into two parts, and the beam sleeve hardware 4 is fixed at the tip, and the beam flange 2a is sandwiched from above and below in the x direction, and is fixed with two-side shear bolts. In the y direction, only one beam sleeve metal member 4 of the same split type is fixed to the beam flange 2a. Also in this case, the distance between the upper and lower bolt insertion holes 4a is equal to or larger than the bolt shaft diameter. The D-type beam sleeve hardware 4 may be of a bent type shown on the right side of FIG. 8 (a). FIG. 9 shows an embodiment in which a D-type beam sleeve hardware 4 is used, and the number of insertion bolts 6 is four in the x direction and four in the y direction.

In FIG. 10, a deformed steel bar 10 having irregularities can be used instead of the insertion bolt 6. In this case, irregularities at predetermined intervals are provided on the inner surfaces of the bolt insertion holes of the column sleeve hardware 11 and the beam sleeve hardware 12, male screws 13 are cut at both ends of the deformed steel bar 10, and washers 16 and nuts 14 are attached thereto. The inside is filled with a grout material 15 such as a high-strength mortar or an adhesive using the inlet 17 and the outlet 18. Deformed steel rod 10 and sleeve hardware 1
The withdrawal strength of the steel bar is improved by the irregularities 1 and 12.
Although the deformed steel bar 10 uses a member with external threads on both sides, one of the members may be a bolt head, and the grout material 15 may omit one of the column sleeve hardware 11 and the beam sleeve hardware 12. it can.

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. This is the case where the column sleeve hardware 3, the beam sleeve hardware 4 and the insertion bolt 6 are used, and the same applies when other sleeve hardware and deformed steel bars are used.

(1) In a factory, a column sleeve metal fitting 3 and a gusset plate 8 for a beam web are fixed to predetermined positions in a panel zone of a through steel column 1 by welding, and the steel column 1, the steel beam 2, and the beam are fixed. The beam flange gusset plate 5 to which the sleeve hardware 4 is attached is transported to the site and the steel column 1
Is built in place.

(2) The steel beam 2 is suspended between the steel columns 1 and 1, and the web 2b of the steel beam 2 is temporarily fixed to the gusset plate 8 protruding from the steel column 1 with a high-strength bolt or the like.
A steel beam 2 is spanned between the two. Similarly, the steel beams 2 in the orthogonal direction are also bridged. At this time, the beam flange gusset plate 5 is temporarily fixed to the steel beam 2 with high strength bolts.

(3) Column sleeve hardware 3 and beam sleeve hardware 4
Are joined to each other, the insertion bolts 6 are inserted into the respective bolt insertion holes, and the nuts 7 are tightened, thereby tightening the column sleeve hardware 3 and the beam sleeve hardware 4.

(4) The beam flange gusset plate 5 is permanently joined to the beam flange 2a with high strength bolts. Finally, the beam web 2b and the gusset plate 8 are permanently joined with high strength bolts.

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 other joints between a steel column having a closed cross section and a steel beam having upper and lower flanges and a web are provided. For example, it is needless to say that the present invention can be applied to a case where a steel column is a circular steel tube column.

[0048]

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

(1) Since the column-sleeve hardware and the beam-sleeve hardware provided respectively on both sides of the steel column and on both sides in the beam width direction of the steel beam are tightened with only insertion bolts / nuts or bolts, the steel column is It is only necessary to fix the column sleeve hardware by welding, and the bracket does not protrude greatly from the steel column unlike the conventional case, so that the transportation becomes easy and the transportation efficiency is greatly improved. Further, the weight of the steel column is not increased, and the hand link at the time of construction on the construction site is facilitated, thereby greatly improving the work efficiency.

(2) Since it is only necessary to fix the column sleeve hardware to the steel column by welding, a large number of pieces are not gathered to the steel column by welding as in the conventional case, and welding work requiring strict precision control can be performed. It is possible to reduce the number of man-hours for production control due to welding distortion and to ensure stable quality.

(3) Since the steel column and the steel beam are directly joined by the sleeve hardware, many joint plates and high-strength bolts are not required as in the conventional case, and the conventional joints (steel column , And a bracket, and a bracket and an intermediate beam), the number of members can be reduced, the number of processing steps and management steps can be reduced, and the efficiency of the joining operation can be improved. As described above, the quality of the joint structure can be stabilized and the cost can be reduced.

(4) Since the stress is directly transmitted to the panel zone by the sleeve hardware and the insertion bolt, there is no restriction on the beam of the steel beam gathering on the steel column. When a steel beam having a different beam is installed, a relatively simple joining structure can be obtained without providing a diaphragm in multiple stages as in the related art.

(5) A rigid column / beam joint can be obtained since the out-of-plane bending stress does not act locally on the side plates of the steel column and the structure can be transmitted only by shearing force.

(6) When a cold-formed square steel pipe is used for a steel column, there is no fear of brittle fracture because the column sleeve hardware is not directly welded to the plastic regions at the four corners.

(7) When concrete is filled in the inside of a steel column, since there is no stiffener or the like in the column, reliable filling can be performed.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a basic configuration of a joint structure between a closed column and a beam according to the present invention, (a) is an elevation view, (b) is a plan view, and (c) is a side view.

FIG. 2A is a plan view showing types of joints between columns and beams in a building, and FIGS. 2B, 2C, and 2D are plan views showing examples in which the joint structure of the present invention is applied to corner pillars. It is a figure, an elevation view, and a side view.

3 (a) is a plan view showing an example in which the joint structure of the present invention is applied to a side pillar, and FIG. 3 (b) is a side view showing various cross-sectional shapes of a pillar sleeve hardware.

FIG. 4 shows an example for the intersection of a column sleeve hardware of the present invention.
(a) is a plan view and (b) is a side view.

5A is a plan view, FIG. 5B is a side view, and FIG. 5C is a view taken along the line cc, showing another example of the column sleeve hardware of the present invention.

6 (a) is a plan view, FIG. 6 (b) is an elevation view, and FIG. 6 (c) is a side view showing an example in which female threads are provided on the pillar sleeve hardware of the present invention.

FIG. 7 is a schematic side view showing an arrangement example of the beam sleeve hardware of the present invention.

FIG. 8 is a side view showing various types of beam sleeve hardware of the present invention.

9 (a) is a plan view and FIG. 9 (b) is an elevation view showing an example in which the beam flange gusset plate of the joint structure of the present invention is different.

FIG. 10 is a plan sectional view showing an example in which a deformed steel bar is used for the bolt member of the joint structure of the present invention.

FIG. 11 shows a stress transmission mechanism in the present invention;
(a) is an elevational view of the whole, (b) is a plan view of the joint, and (c) is an elevational view of the joint.

FIG. 12 shows a conventional outer diaphragm type joint.
(a) is a plan view and (b) is an elevation view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Steel column 1a ... Side plate 2 ... Steel beam 2a ... Upper and lower beam flange 2b ... Beam web 3 ... Column sleeve metal 3a ... Bolt insertion hole 3b ... Female screw 3c ... Substrate 3d ... Rib 4 ... Beam sleeve metal 4a ... Bolt insertion hole 5: Beam flange gusset plate 6: Insertion bolt (high-strength bolt) 7: Nut 8: Gusset plate for beam web 10: Deformed steel bar 11: Column sleeve hardware 12: Beam sleeve Hardware 13… Male thread 14… Nut 15… Grout material 16… Washer 17… Injection port 18… Discharge port

Claims (6)

[Claims] 1. A joint structure for joining the ends of a steel beam having upper and lower flanges and a web to the side surface of a steel column having a closed cross section, and comprising: A closed-type cross-section column, wherein the column sleeve metal member and the beam sleeve metal member are fixed so that their joint end surfaces can be in close contact with each other, and a bolt member is inserted through the column sleeve metal member and the beam sleeve metal member and tightened with a nut. Beam joint structure. 2. The beam-joint structure according to claim 1, wherein the beam sleeve is fixed to a beam flange gusset plate, and the beam gusset plate is attached to the beam flange and bolted or welded. A joint structure of a closed section column and a beam, characterized by being fixed with a. 3. The closed structure according to claim 1, wherein the gusset plate fixed to the side plate of the steel column is bolted to the beam web. Column and beam joint structure. 4. The joint structure of a closed section column and a beam according to claim 1, 2 or 3, wherein the bolt member is a through bolt. Joint structure. 5. A joint structure of a column and a beam having a closed cross section according to claim 1, 2, 3 or 4, wherein the bolt member is a deformed steel bar, and the sleeve metal member is made of a grout material or a grout material. A joint structure of a closed column and a beam, characterized by being filled with an adhesive. 6. A joint structure between a column and a beam having a closed cross section according to claim 1, 2 or 3, wherein a female screw is formed inside the column sleeve, and the bolt is inserted through the beam sleeve. A joint structure between a closed column and a beam, wherein a member is screwed into the female screw and tightened.