JP3208682B2 - Joint structure between core wall and steel beam - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure between a core wall and a steel beam, and more particularly to a joint structure between a core wall and a steel beam which exhibits high joint strength when joined to a reinforced concrete structure.

[0002]

2. Description of the Related Art Conventionally, in steel beams and truss beams, a steel material having an H-shaped cross section is directly laid at a target position, or the steel material is provided as an aggregate at a central portion of a cross section of the steel beam to provide a peripheral structure. It is a common practice to cast concrete into the concrete. The connection of the steel beam and the truss beam to the concrete structure is shown in FIG.
As shown in, for example, a reinforced concrete wall (hereinafter, referred to as
When the steel beam 2 is joined to the “RC wall” 1, the anchor bolt 3 is placed at a position of the RC wall 1 where the steel beam 2 is to be connected, and the distal end of the anchor bolt 3 projects from the surface of the RC wall 1. And a base plate 4 is fixed to the anchor bolt 3 and an end of the steel beam 2 in the longitudinal direction is fixed to the base plate 4, or as shown in FIG. Is connected to a steel frame member having the same cross section as that of the steel beam 2 embedded in a concrete wall.

[0003]

However, in the case of the above-described joint structure between the core wall and the steel beam, most of the load acting on the steel beam 2 is supported by the web portion. If the load to be supported is large, it is necessary to use a large steel beam 2 or to specially manufacture and use a steel beam 2 having an extremely thick web. In the former case, the weight of the steel beam 2 itself increases, which causes a decrease in the construction efficiency and also increases the cost, so that the above problem cannot be solved fundamentally. Further, in order to support the axial force acting on the steel beam 2 by the anchor bolt 3, the number of bolts becomes excessive. On the other hand, in the latter case, the thickness of the web should be determined according to the load to be supported in order to suppress the increase in the amount of steel used, but the problem is that the production efficiency is reduced and the production cost is increased. Occurs.
Further, in the case of FIG. 7, a sufficient concrete covering thickness is required in which reinforcing bars are arranged on both sides of the steel beam 2, and as a result, the thickness of the concrete wall 1 must be increased. However, the weight increases and the construction efficiency decreases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problem, and reliably transmits stress acting on a beam to a concrete structure to improve strength at a joint portion between the beam itself and another structure. In addition, it is an object of the present invention to provide a joint structure between a core wall and a steel beam, which simplifies a joining operation with another structure.

[0005]

According to the present invention, a core portion of a building made of reinforced concrete or the like is provided.
A corrugated steel frame is constructed by connecting steel beams to
Joint structure between steel wall and core wall of steel building structure
In, a pair of strips spaced apart at a fixed interval in parallel with each other to the anchor portion to which the steel beam of the core portion is to be joined,
The steel beam is arranged and configured to have a pair of strips parallel to each other and spaced apart at a fixed interval, and the steel beam is supported by the core by connecting the strip to the strip of the core. A joint structure between a core wall and a steel beam, which is characterized in that the above-mentioned problem is solved. According to a second aspect of the present invention, in the joint structure between the core wall and the steel beam according to the first aspect, the pair of strips of the steel beam are connected by a connecting member disposed therebetween. The joint structure between the core wall and the steel beam, which is characterized by the above, is the means for solving the above problem. According to a third aspect of the present invention, in the joint structure of the core wall and the steel beam according to the first or second aspect, concrete is cast between the pair of band plates of the anchor portion. In addition, a joint structure between a core wall and a steel beam, wherein a large number of stud dowels projecting from the inner surface are buried in the cast concrete, is provided as a means for solving the above-mentioned problem.

[0006]

According to the joint structure of a core wall and a steel beam of the present invention, since the steel beam is joined to the core portion via the band plate,
The tensile force of the steel beam is dispersed throughout the core portion and is efficiently supported. When the beams are arranged with the plane direction being the vertical direction, both the paired strips support the load as webs, and the connecting member prevents the buckling of the strips. In addition, since the fixing member is embedded in the concrete, the displacement force of the band plate to the outside is supported via the concrete, and the connection strength between the pair of band plates is ensured.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In the figure, reference numeral 10 denotes a reinforced concrete wall (hereinafter referred to as “R”) forming a core portion of a core wall building structure.
C wall), 11 is a steel beam joined to the RC wall 10, 12 is a strip, 13 is a flange (connection member), 14
Reference numeral denotes a horizontal anchor beam (corresponding to an anchor portion) which is horizontally disposed in the RC wall 10 and supports the tensile force of the steel beam 11. As shown in FIG. 1, the RC wall 10 is a wall portion of a core wall formed in the center of the building, and forms the entire outer shape of the core wall.

As shown in FIG. 2, the steel beam 11 is provided with a pair of long strips 12 arranged in parallel with each other, and a flange 13 is provided between the pair of strips 12 so as to connect both. It is connected to form a rectangular shape in cross section, and one end in the length direction is connected to the horizontal anchor beam 14. The strip 12 and the flange 13 are both made of steel, and are welded so as to be perpendicular to each other. The strip 12 is a steel beam 11
Are arranged on both left and right sides in the width direction. Flange 1
Numerals 3 are fixed to the upper and lower bottoms of the strips 12 and 12, respectively, to prevent the buckling of the strips 12. And the steel beam 1
Reference numeral 1 denotes an extension of a horizontal anchor beam 14 erected horizontally above the core wall, and an end of the steel beam 11 disposed on the extension of the horizontal anchor beam 14 on the side opposite to the RC wall 10. The two trusses and the RC wall 10 form a truss structure.

As shown in FIG. 3, the horizontal anchor beam 1
Reference numeral 4 denotes a pair of the two strips 12 and 12 which are opposed to each other in parallel with each other, and stud dowels (fixing members) protruding from inner surfaces of the strips 12 and 12 which face each other.
15 and concrete 16 poured between the strips 12 and 12 and formed to have the same outer dimensions as the steel beam 11 in cross section. A large number of stud dowels 15 are protrudingly provided on opposing side surfaces of each band plate 12. The stud dowel 15 has a ring-shaped support plate 15a attached to a tip end thereof, and exhibits tensile strength by being buried in the concrete 16. As shown in FIG. 4, at a corner portion of the core wall forming a right angle in a plan view, one band plate 12 of a horizontal anchor beam 14 arranged orthogonally to each other is cut at a position in contact with the corner portion, and the other is cut. It is formed in a form extending to the deepest part of the corner portion, and the corner plate 17 is set in the opening portion of the corner portion, and the whole is formed in a square frame shape in plan view. In the corner portions, the band plate 12 and the corner plate 17 are joined by welding or the like, and are integrated with the cast concrete 16. At the time of placing concrete 16,
Since the horizontal anchor beams 14, 14 and the concrete 16 are in close contact, there is no concrete falling. In addition, when the crossing angle of the horizontal anchor beams 14 is other than a right angle, it can be easily coped with by changing the form of the corner plate 17.

The horizontal anchor beam 14 is provided on the steel beam 1.
Instead of 1, it may be installed at the position where the steel beam 11 is provided.

The operation and effect of this embodiment will be described below. The joint structure between the core wall and the steel beam of the present embodiment is:
The strips 12, 1 of both the steel beam 11 and the horizontal anchor beam 14
2 is joined, it is easy to increase the cross-sectional area of the strips 12 to be joined by adjusting the thickness of the strips 12. The tensile force of the steel beam 11 is
The horizontal anchor beam 14 is removed from the RC through the joints 2 and 12.
It is distributed and transmitted to the entire wall 10. The strips 12, 12
It is located on the side of the steel beam 11 and supports the load applied in the surface direction. The flange 13 prevents buckling of each strip 12.

Therefore, according to the joint structure of the core wall and the steel beam of the present embodiment, the tensile force of the steel beam 11 is transmitted to the entire RC wall 10 in a dispersed manner.
It is easy to secure a sufficient supporting force between the steel beam 11 and the horizontal anchor beam 14, and since each strip 12 is located on both sides in the width direction of the steel beam 11, it is exposed.
The joining operation with the horizontal anchor beam 14 in the wall 10 is facilitated, and the joining accuracy is improved. Further, since most of the load supported by the steel beam 11 is supported by the strip 12, the flange 13 can be simplified, and in addition, the material can be saved and the manufacturing cost can be reduced. The thickness of the flange 13 can be set in consideration of securing the bonding strength, rather than securing the load supporting force.

On the other hand, like the horizontal anchor beam 14, the steel beam 11 and the horizontal anchor beam 14
Is buried in the concrete 16, the stress against external force can be dispersed to the concrete 16 to prevent the concentration of stress, and a high supporting force against tension and the like can be exhibited. The joint structure between the core wall and the steel beam according to the present embodiment is the same as that of the truss beam A in FIG. 1B and the feederdale beam B in FIG. 1C. The steel beam 11 constituting the beam B is strongly supported by the horizontal anchor beam 14 similarly to the case of the steel beam 11, and the axial force of the beam between the steel beams 11, 11 connected to each other is not limited. The dispersion is prevented and the stress concentration is prevented, and the supporting force is further improved.

Hereinafter, a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a sectional view of a steel beam 18 showing a second embodiment of a joint structure between a core wall and a steel beam according to the present invention. They are connected by a connecting bar 19 installed between them. The steel beam 18 is constructed by extending the connecting bar 19 between the strips 12 in the vertical direction. Each connecting bar 19 is detachably provided to the band plate 12 by a screw or the like. The connection bar 19 may be of another form such as a plate.

Therefore, according to the joint structure of the core wall and the steel beam of the present embodiment, the structure and effect of the joint structure of the core wall and the steel beam of the first embodiment can be obtained. If the concrete 16 is cast between the plates 12, 12, the connecting bars 19 are embedded in the concrete 16, so that the tensile stress generated in the strips 12, 12 can be dispersed in the concrete 16, and the tensile strength is improved. In addition, the number of connecting bars 19 to be attached is smaller than that of the stud dowels 15, and the installation is easy. Further, since the connecting bar 19 is detachable from the band plate 12, when the connecting bar 19 interferes with other parts of the building, the connecting bar 19 can be easily removed, and construction efficiency is improved. In addition, when the connecting bar 19 is a plate, the band plates 12, 12
The concrete 16 can be filled in the entire space between the strips 12 by controlling the area around the concrete 16 to be cast between them, and the quality is improved. The joint structure between the core wall and the steel beam according to this embodiment is the same as the truss beam A shown in FIG.
Also, in the Fireendale beam B of FIG. 1C, excellent effects can be obtained similarly to the case of the steel beam 11.

[0016]

As described above, according to the joint structure of the core wall and the steel beam according to the first aspect, the core portion is spaced apart from the anchor portion to which the steel beam is to be joined at a predetermined interval in parallel with each other. A pair of strips is arranged , the steel beam is composed of a pair of strips parallel to each other and spaced at a fixed interval, and the steel beam is connected to the strip of the core part by the strip. It is characterized by being supported by the core part, so it is easy to distribute the tensile force of the steel beam to the core part through the band plate of the anchor part to secure sufficient supporting force against load. Since each strip is located on both sides in the width direction of the steel beam and exposed, the joining work between the core and the steel beam in the core wall method can be performed easily and accurately, and the work efficiency and accuracy of the joining are improved. improves.

According to the joint structure between the core wall and the steel beam according to the second aspect, the joint structure between the core wall and the steel beam according to the first aspect, wherein the core wall and the steel frame according to the first aspect are provided. A joint structure with a beam , wherein the steel beam is
Since the pair of band plates are connected by a connecting member disposed therebetween, the load supporting force of the band plate is further improved, and, of course, the opposing band plates are connected by a connecting member in advance. If the set is set at the construction position, the positioning of the strip is advantageous, and construction accuracy is improved.

According to the joint structure of the core wall and the steel beam according to the third aspect, the joint structure of the core wall and the steel beam according to the first or second aspect is provided ,
A pair of strips , concrete is cast between the pair, and a number of stud dowels projecting from the inner surface are embedded in the cast concrete, so that the tensile stress generated in the strips is fixed. It can be transmitted to concrete via a member, and exhibits higher tensile strength than the inventions of the first and second aspects.

[Brief description of the drawings]

FIGS. 1A and 1B are diagrams showing an embodiment of the present invention, wherein FIG. 1A is a front view, FIG. 1B is a front view showing a truss beam, and FIG.

FIG. 2 is a sectional view showing the steel beam shown in FIG. 1;

FIG. 3 is a sectional view showing a horizontal anchor beam in FIG. 1;

FIG. 4 is a plan view showing a corner portion of a core wall.

FIG. 5 is a sectional view showing a steel beam or horizontal anchor beam according to a second embodiment of the present invention.

FIG. 6 is a view showing a conventional method of joining a steel beam to a building.

7A and 7B are views showing a method of joining a conventional steel beam to a structure other than that shown in FIG. 6, wherein FIG. 7A is a side view, FIG. 7B is a cross-sectional view, and FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 Steel beam 12 Strip 13 Flange (connection member) 14 Anchor part (horizontal anchor beam) 15 Stud dowel (anchoring member) 16 Concrete 18 Steel beam 19 Connection bar (connection member)

Claims (3)

(57) [Claims] 1. A core wall of a building made of reinforced concrete or the like, and a core wall and a steel beam of a core wall building structure in which a steel frame is provided by connecting a steel frame to the core.
In the joining structure , a pair of strips spaced apart from each other at a fixed interval in parallel with each other at an anchor portion to which the steel beams of the core portion are to be joined are arranged ,
The steel beam is configured to include a pair of strips parallel to each other and spaced at a constant interval, and the steel beam is supported by the core by connecting the strip to the strip of the core. A joint structure between a core wall and a steel beam. 2. The joint structure between a core wall and a steel beam according to claim 1, wherein the pair of strips of the steel beam are :
A joint structure between a core wall and a steel beam, wherein the joint structure is connected by a connecting member disposed therebetween. 3. The joint structure between a core wall and a steel beam according to claim 1 or 2, wherein a pair of the anchor portions is provided.
The strip of the core wall and the steel beam, wherein concrete is cast between the pair, and a number of stud dowels projecting from the inner surface are buried in the cast concrete. Joint structure.