JP2005282019A - Joint structure of steel framed small beam - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint structure of steel framed small beams capable of making the adjoining steel framed small beams as continuous beams holding a steel framed large beam 1 at a low cost by a simple constitution. <P>SOLUTION: Upper flanges 2b of the adjoining steel framed small beams 2 by holding the steel framed large beam 1 are arranged so that a splice plate 5 can stride both of them to connect them through a clamping means 6, and lower flanges 2c are connected to each other with a metal touch joint through a web 1a of the steel framed large beam 1, a flange connection member 4 and compression members 7 making a pair by holding them. Tension occurring in the end sections of the upper flanges 2b is thereby transferred to the upper flanges 2b of the smoothly adjoining steel framed small beams 2 through the splice plate 5 and the clamping means 6, and compressive force occurring in the end sections of the lower flanges 2c is transferred to the lower flanges 2c through the web 1a of the steel framed large beam 1, the flange connection member 4 and the compression member 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a joint structure for steel beam.

2. Description of the Related Art Conventionally, a frame including a steel-framed large beam and a small beam is, for example, as shown in Patent Document 1, a plurality of large beams arranged in parallel with a predetermined spacing interval at the position where the small beam is engaged with the small beam. A small beam is simple, for example, a receiving member is provided, a small beam is placed on the small beam receiving member so that adjacent large beams are connected, and the upper flanges of adjacent small beams are connected with the large beam in between. It is equipped to function as a beam.
JP 2002-356913 A

  These small beams, which constitute the frame as simple beams, tend to bend when subjected to vertical loads such as slab concrete placement, and are easily affected by live loads, earthquakes, etc. . In order to cope with such a phenomenon, in constructing a steel frame, a structure has been devised in which adjacent small beams are connected to each other with a large beam connected to form a continuous beam.

  However, many of the configurations that connect adjacent small beams across the large beam to form a continuous beam are such that the end surface of the web and the lower flange of the small beam are in contact with the web surface of the large beam. A structure in which the upper flange of the small beam and the upper flange of the large beam, the web that forms the small beam, the end surface of the lower flange and the web surface of the large beam are butted against each other, and the small beam is formed with the large beam web. Weld a stiffener-shaped connection member at the position where it is connected to the web, and when the upper flanges of both are placed on the same plane, a vertical haunch is applied to the beam so that the lower flange of the beam will abut the lower flange of the beam. Such a process is complicated, such as butt welding the large beam and the small beam, and requires a lot of work time and high cost. For this reason, when there is no special condition such as a vibration condition in the frame, a configuration in which the small beams adjacent to each other with the large beams interposed therebetween are rarely employed.

  In view of the above-described circumstances, an object of the present invention is to provide a steel beam connection structure that allows a steel beam that is adjacent to the steel beam to be a continuous beam at a low cost with a simple configuration.

  The steel beam connection structure according to claim 1 is arranged so as to connect a plurality of steel beam beams arranged in parallel with a predetermined separation interval, and the same axis perpendicular to the extending direction of the steel beam beam. A steel small beam connecting structure for connecting a plurality of steel small beams adjacent to each other across the large beam located on a line, wherein the steel large beam web is located at a position where the steel small beam is engaged with the steel frame. A web connecting member formed into a plate shape is installed perpendicular to the web of the steel large beam so as to close the region surrounded by the upper and lower flanges and the web of the large beam, and the steel small beam includes the web and the web The web connecting member, and the upper flange and the upper flange of the steel beam are arranged so as to be located on the same plane, and the web of the steel beam and the web connecting member are arranged over the both. It is fastened through a chair plate and fastening means, and the upper flanges of the adjacent steel small beams sandwiching the steel beam are fastened together via a splice plate and fastening means that are arranged across both of them, and the lower flange The webs of the large beams and the webs of the large beams are arranged in pairs, and are joined by metal touch through a compression material that generates a horizontal pressing force.

  3. The steel beam connection structure according to claim 2, wherein a plate-like flange connection member that abuts the web of the steel beam and forms the same plane as the lower flange of the steel beam on each of both surfaces of the web connection member. The lower flanges of the steel beam are joined by a metal touch through a pair of compression members arranged in addition to the web of the steel beam and sandwiching the flange connecting member. It is a feature.

  The steel beam connection structure according to claim 3, wherein the compression member is formed into a shape having side end surfaces that are in contact with each other at each end surface of the lower beam flange and the web of the steel beam. Is supported by a pair of compressed material support members that protrude from the web of the steel beam and the lower surface of the lower flange of the steel beam so as to face each other.

  According to the connection structure of the steel beam according to claim 1, the upper flanges of the steel beam adjacent to each other with the steel beam interposed therebetween are fastened via the splice plate and the fastening means arranged over both. The lower flanges are joined to each other by a metal touch through a pair of compression members arranged between the steel beam and the web of the steel beam.

  As a result, when a vertical load is applied to an integral steel beam, the axial tensile force always generated on the upper flange in the vicinity of the end of the beam is caused by the splice plate and the fastening means, and the lower flange. The axial compressive force generated in the steel is smoothly transmitted to the adjacent steel beam by the metal touch via the steel beam and the compression material, so that the adjacent steel beam is simplified by sandwiching the steel beam. It becomes possible to function as a continuous beam with a simple configuration.

  Along with this, compared to the case of functioning as a simple beam connecting adjacent steel beams, the deflection when a vertical load is applied can be greatly eliminated, and when affected by live loads, earthquakes, etc. In addition, it is possible to greatly improve the vibration performance of the floor constructed on the steel beam and the steel beam.

  In addition, since the compression material generates a pressing force in the horizontal direction, even when a vertical load is not applied to the steel beam, the lower flanges of adjacent steel beam are connected to the web of the steel beam. In addition, since it is joined by metal touch via a pair of compressed materials placed between them, there is no need to use fixing means such as welding or adhesion, so that workability is good and costs can be significantly reduced. It becomes.

  According to the connection structure of the steel beam according to claim 2, a flange connection member is installed on each of both surfaces of the web connection member, and lower flanges of the steel beam adjacent to each other across the steel beam are connected to the steel frame. Since it is joined by a metal touch through a pair of compression members arranged between the web of the large beam and the flange connecting member, the compression material can be reduced or shortened, and thus simplified. With the structure, it is possible to efficiently join the lower flanges of adjacent steel beam beams by metal touch by applying a horizontal pressing force efficiently.

  According to the steel beam connection structure according to claim 3, the compression material is installed so that a lower end surface thereof protrudes from the lower surface of the lower flange of the steel beam and the web of the steel beam so as to face each other. Since the load is supported by the pair of compressed material support members, a live load acts on the steel beam, or a thermal stress acts on the steel beam to cause a phenomenon such as expansion and contraction. Even when the lower flange behaves in the direction of avoiding the above, it is possible to prevent the compression material from dropping.

  The connection structure of the steel beam according to the present invention is shown in FIGS. In the present invention, the end portions of the upper flange that generates a tensile force when a vertical load is applied between a plurality of steel beam beams that are adjacent to each other with a large beam interposed therebetween are interposed between a splice plate and a fastening means. The end of the lower flange where the compression force is generated is fastened and functions as a continuous beam by joining the large beam web with a metal touch via a pair of compression materials placed between them, making the steel beam simple This is to improve the deflection and vibration performance as compared with the case of functioning as a beam.

(First embodiment)
The steel frame is provided with a steel beam and a steel beam having a smaller beam than the steel beam. As shown in FIG. 1, the steel beam 1 includes a steel beam 2. The steel beams 2 are arranged adjacent to each other with the steel beam 1 sandwiched between them, and both are positioned on the same axis perpendicular to the extending direction of the steel beam 1 doing.

  In the present embodiment, only the single steel beam 1 and the two steel beam beams engaged with it are shown, but a plurality of the steel beam 1 are arranged in parallel with a predetermined spacing, The steel beam 2 is arranged so as to connect the adjacent steel beam 1 to each other. The structure in which the steel beam 2 is adjacent to the steel beam 1 is defined as the direction in which the steel beam 1 extends. A plurality are continuously formed on the same orthogonal axis.

  The steel beam 2 is arranged at a height position where the upper flange 2b forms the same plane as the upper flange 1b of the steel beam 1 and the web 2a is provided on the web 1a of the steel beam 1 It arrange | positions so that the same web joining member 3 may be formed.

  The web connecting member 3 is provided on both sides of the web 1a of the steel beam 1 in pairs with the steel beam 2 and is surrounded by the upper and lower flanges 1b and 1c of the steel beam 1 and the web 1a. It is comprised with the plate-shaped steel plate which has the same planar view shape as the area | region to be called. These are arranged in a stiffener shape so as to be orthogonal to the web 1a of the steel beam 1 and close the area surrounded by the upper and lower flanges 1b and 1c of the steel beam 1 and the web 1a, and are fixed by fixing means such as welding. ing.

  The web connecting member 3 is provided with flange connecting members 4 on both sides thereof. The flange connecting member 4 is made of a plate-shaped steel plate that forms the same plane as the lower flange 2c of the steel beam 2 and the end surface is in contact with the web 1a of the steel beam 1 between the surfaces.

  The steel beam 1 and the steel beam 2 having such a configuration are arranged on both surfaces of the web 2a of the steel beam 2 so that the splice plate 5 straddles the web connecting member 3 provided on the steel beam 1. The splice plate 5 and the web 2a, and the splice plate 5 and the web connecting member 3 are fastened through the fastening means 6, and both are joined.

  Further, a splice plate 5 is disposed on the upper flange 2b of the steel beam 2 adjacent to the steel beam 1 so as to straddle both, and the splice plate 5 and the upper flange 2b are provided with high strength bolts. The upper flange 2b of the steel small beam 2 adjacent to each other with the steel large beam 1 sandwiched therebetween is also joined.

  On the other hand, a compression material 7 is fitted between the lower flange 2 c of the steel beam 2 and the flange connecting member 4, and both are joined by metal touch via the compression material 7. The compression material 7 is made of a hard steel material that does not deform even when an external force is applied, and is fitted between the lower flange 2c of the steel beam 2 and the flange connecting member 4, thereby It is formed in a size that allows a horizontal pressing force to act.

  Since the structure in which the lower flange 2c of the steel beam 2 and the flange connecting member 4 are joined by metal touch through the compression material 7 is continuous through the web 1a of the steel beam 1, the steel beam 1 The lower flange 2c of the steel beam 2 adjacent to each other sandwiches the web 1a of the steel beam 1, the flange connecting member 4 that makes contact with both sides of the web 1a, and a pair disposed between the two. It is configured to be joined by metal touch through the compression material 7.

  As described above, the structure using different joining structures between the upper flange 2b and the lower flange 2c of the steel beam 2 adjacent to each other with the steel beam 1 interposed therebetween is to place slab concrete on the steel beam 2 or to load a forklift. This is because the tensile force in the axial direction is applied to the end of the upper flange 2a and the compressive force is applied to the end of the lower flange 2a when a vertical load is applied.

That is, the tensile force generated at the end of the upper flange 2b of one of the adjacent steel beam 2 across the steel beam 1 is smoothly transferred to the other steel beam 2 via the splice plate 5 and the fastening means 6. It is transmitted to the upper flange 2b.
Further, the compressive force generated at the end of the lower flange 2c of one of the steel small beams 2 adjacent to each other with the steel large beam 1 sandwiched between the web 1a of the steel large beam 1, the flange connecting member 4 in contact therewith, and these It is smoothly transmitted to the lower flange 2c of the other steel beam 2 through the pair of compression members 7 arranged in between.

  In this way, the steel small beams 2 that are adjacent to each other with the steel large beam 1 interposed therebetween function not as a simple beam but as a continuous beam in which both are integrated. As a result, even when a vertical load is applied to the steel beam 2, the amount of deflection can be greatly reduced compared to the case of functioning as a simple beam, and accordingly, it is laid on the upper surface thereof. This can greatly improve the vibration performance of a floor (not shown).

In the present embodiment, the configuration in which the flange connecting member 4 is used for joining the lower flanges 2c of the adjacent steel small beams 2 with the steel large beam 1 sandwiched therebetween is as follows. This is intended to shorten or reduce the shape of the compression material 7 installed between the web 1a.
This can not only generate the horizontal pressing force generated by fitting the compression material 7 between them more efficiently, but also, for example, a live load acts on the steel beam 2 or heat Even when the stress acts and a phenomenon such as expansion and contraction occurs in the steel beam 2 and the lower flange 2c behaves in such a direction as to avoid the pressing force applied from the compression material 7, the compression material 7 is It is intended to suppress the phenomenon that the compressed material 7 falls by reducing the expansion fluctuation of the installed space.

  Further, as shown in FIG. 1, by using a wedge-shaped member for the compression material 7, even when the space where the compression material 7 is installed is expanded due to the phenomenon described above, the wedge-shaped compression material 7 itself The horizontal level is lowered downward so that the flange fitting member 4 is always fitted between the lower flange 2c of the steel beam 2 and an axial pressing force is applied to the lower flange 2c of the steel beam 2. It has a configuration that can be done.

  However, the shape of the compression material 7 is not necessarily limited to this, and has a cross section that is substantially larger than the gap between the flange connecting member 4 and the lower flange 2c of the steel beam 2 and is horizontal to both. For example, as shown in FIG. 2, a plurality of steel plates formed into a plate shape may be used as the compression material 7, as long as the pressing force can be applied.

  The compression material 7 having such a configuration in which a plurality of steel plates are superposed is appropriately adjusted in accordance with the gap generated between the flange connecting member 4 and the lower flange 2c of the steel beam 2. In addition, since the magnitude of the pressing force to be applied to the lower flange 2 of the adjacent steel small beam 2 across the steel large beam 1 can be freely adjusted, its versatility is high. The compression material 7 having a configuration in which a plurality of steel plates are overlapped is preferably provided with a diameter-expanded head so that it does not fall even when the space in which the compression material 7 is installed expands. Then, the head is provided so that the compression material 7 may have a cross-sectional view.

(Second Embodiment)
In the first embodiment, the lower flanges 2c of the adjacent steel small beams 2 sandwiching the steel large beam 1 are arranged between the web 1a of the steel large beam 1, the flange connecting member 4 contacting the web 1a, and the flange connecting member 4 therebetween. Although the structure which joins by the metal touch through the said compression material 7 which makes the pair which showed is shown, the structure joined by a metal touch does not necessarily stick to this.
In the second embodiment, without using the flange connecting member 4, the lower flanges 2 c of the steel small beams 2 adjacent to each other with the steel large beam 1 interposed therebetween are arranged with the web 1 a of the steel large beam 1 and the web 1 a therebetween. The structure joined by the metal touch through the said compression material 7 which makes a pair is shown.

  In the present embodiment, the steel beam 1 and the steel beam 2 adjacent to the steel beam 1 are the same as those used in the first embodiment, and the steel beam 2 has an upper flange 2b with the steel frame. The web 2a is disposed at a height position that forms the same plane as the upper flange 1b of the girder 1 and the web 2a forms the same plane as the web connecting member 3 provided on the web 1a of the steel girder 1. Has been placed.

As shown in FIG. 3, the flange connecting member 4 is not disposed on the web connecting member 3 of the steel beam 1, the lower flange 2 c of the steel beam 2, the web 1 a of the steel beam 1, The compression material 7 is fitted between the two and joined by metal touch.
The compression member 7 is formed of a steel material having at least an end surface of the lower flange 2c of the steel beam 2 and a side end surface that can be brought into contact with each of the webs 1a of the steel beam 1.

  Note that the distance between the end surface of the lower flange 2c of the steel beam 2 and the side end surfaces that can be brought into contact with the web 1a of the steel beam 1 is between the end surface of the lower flange 2c of the steel beam 2 and the steel frame. The long beam 1 is formed to be substantially longer than the distance from the web 1a. This is because even when no external force is applied to the steel beam 2, the lower beam 2 c of the steel beam 2 and the web 1 a of the steel beam 1 are transferred from the compression material 7 to the steel beam 2. This is to apply a pressing force in the axial direction.

In the present embodiment, the compression member 7 is made of a steel plate having the same thickness as that of the lower flange 2c of the steel beam 2 but is not necessarily limited to this. As long as it has a side end face that can contact the end face of the flange 2c and the web 1a of the steel beam 1 with each other, it may be formed in any shape such as a rectangular parallelepiped.
By the way, when the compression material 7 is installed between the lower flange 2c of the steel beam 2 and the web 1a of the steel beam 1, as shown in FIG. 9 is supported.

The compression material support member 9 has an upper end surface that is in contact with and supports the lower end surface of the compression material 7, and is positioned at the same horizontal level as the lower end surface of the lower flange 2 c of the steel beam 2. Each of the webs 1a of the steel beam 1 is arranged in a pair so as to protrude opposite each other, and is fixed using fixing means such as welding.
Such a configuration using the compression material supporting member 9 causes a live load such as a repetitive load of a forklift to act on the steel beam 2 or a phenomenon such as expansion and contraction on the steel beam 2 due to a thermal stress. Even when the lower flange 2c behaves in a direction to avoid the pressing force applied by the compression material 7, the compression material 7 does not fall, and the adjacent steel frames sandwiching the steel beam 1 with stable accuracy. The small beam 2 can be a continuous beam with a simple configuration.

  According to the first embodiment and the second embodiment described above, the connecting structure of the steel beam 2 is such that the upper flanges 2b of the steel beam 2 adjacent to each other with the steel beam 1 sandwiched therebetween are connected to each other. Compressed material that is fastened via a splice plate 5 and fastening means 6 that are arranged across the base, and that the lower flange 2c is paired with the web 1a and the flange connecting member 4 of the steel beam 1 and sandwiching them. 7 is joined by metal touch through 7.

  As a result, when a vertical load is applied to the integral steel beam 2, the axial tensile force always generated in the upper flange 2 b near the end of the beam 2 passes through the splice plate 5 and the fastening means 6. In addition, since the axial compression force generated in the lower flange 2c is smoothly transmitted to the adjacent steel beam 2 by the metal touch via the web 1a of the steel beam 1 and the compression material 7, the steel frame The steel beam 2 adjacent to the large beam 1 can be made to function as a continuous beam with a simple configuration.

  Along with this, compared to the case where the steel beam 2 is made to function as a simple beam that connects the adjacent steel beam 1, the deflection when a vertical load is applied can be greatly eliminated, and live loads, earthquakes, etc. Even under the influence of the above, it is possible to greatly improve the vibration performance of the floor constructed on the steel beam 1 and the steel beam 2.

  In addition, since the compression material 7 generates a pressing force in the horizontal direction, even if no vertical load is applied to the steel beam 2, the lower flanges 2 c of the adjacent steel beam 2 are connected to each other. Since it joins by the metal touch via the web 1a of the steel beam 1 and the pair of compression members 7 arranged sandwiching the web 1a, there is no need to use fixing means such as welding and adhesion, and workability is good and cost is reduced. It can be greatly reduced.

  On the other hand, the compression member 7 is fitted between the web 1a of the steel large beam 1 and the lower flange 2c of the steel small beam 2 without using the flange connecting member 4, and the lower flange 2c of the adjacent steel small beam 2 is fitted. Even when the two are joined by metal touch through the web 1a of the steel beam 1 and the pair of compression members 7 disposed between them, the web 1c of the steel beam 1 and the steel beam 2 are connected. Since it is supported by a pair of compressed material support members 9 that protrude from the lower surface of the lower flange 2c so as to face each other, a live load acts on the steel beam 2 or thermal stress acts on the steel beam 2 Even when a phenomenon such as expansion and contraction occurs in the steel beam 2 and the lower flange 2c behaves in a direction to avoid the pressing force applied by the compression material 7, the compression material 7 does not fall and is stable. The steel beam 1 is sandwiched with high accuracy It is possible to function as a communication beam with a simple configuration the adjacent steel joists 2c in.

It is a figure which shows 1st Embodiment of the joining structure of the steel beam according to the present invention. It is a figure which shows the other example of 1st Embodiment of the joining structure of the steel beam according to the present invention. It is a figure which shows 2nd Embodiment of the joining structure of the steel beam according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steel beam 2 Steel beam 3 Web connection member 4 Flange connection member 5 Splice plate 6 Fastening means 7 Compression material 9 Compression material support member

Claims (3)

A plurality of adjacent steel beams arranged parallel to each other with a predetermined spacing are located on the same axis perpendicular to the extending direction of the steel beams. The steel beam connection structure that connects the steel beam beams of
A web connecting member formed into a plate shape so as to close a region surrounded by the upper and lower flanges and the web of the steel large beam at the position of engagement with the steel small beam on the web of the steel large beam, The steel beam is disposed perpendicular to the web, and the steel beam is disposed so that the web and the web connecting member, and the upper flange and the upper flange of the steel beam are positioned on the same plane, respectively. The web and the web connecting member are fastened through a splice plate and fastening means arranged across both,
The upper flanges of the adjacent steel small beams sandwiched between the steel large beams are fastened through a splice plate and fastening means arranged across both,
Steel flanged beam connection structure characterized in that lower flanges are arranged in a pair with the web of the large beam interposed therebetween, and are joined by metal touch through a compression material that generates a horizontal pressing force. . In the connection structure of the steel beam according to claim 1,
A plate-like flange joint member that is in contact with the steel large beam web and forms the same plane as the lower flange of the steel small beam is installed on both surfaces of the web joint member,
The lower flanges of the steel beam are joined by a metal touch through a pair of compression members arranged with the flange connecting member in addition to the web of the steel beam. Construction. In the joining structure of the steel beam according to claim 1,
The compressed material is formed into a shape having side end surfaces that are in contact with each other at each end surface of the lower flange of the steel beam and the web of the steel beam.
A steel beam having a lower end supported by a pair of compressed material support members that protrude from the web of the steel beam and the lower surface of the lower flange of the steel beam so as to face each other. Bonding structure.

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