JP2000282564A - Steel encased reinforced concrete building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To excellently transmit a force to wall vertical reinforcements and to build a steel encased reinforced concrete building at low cost and in a shortened construction period by constituting a steel beam of a pair of steel products which are arranged in parallel with each other with a predetermined gap therebetween, and inserting the wall vertical reinforcements into the gap. SOLUTION: A pair of channels 19 forming a steel beam are arranged back to back. Wall vertical reinforcements 44 connect a lower vertical portion 44b to an upper vertical portion 44a, and include a slanting portion 44c which is inserted into the gap between both the channels 19 forming the steel beam. A horizontal interval H1 at the upper vertical portion 44a and the lower vertical portion 44b is set larger than a width H2 of a gap defined by the channels 19 forming the steel beam. The slanting portion 44c includes an X-shape cross portion as viewed in the direction of an extension of the beam. The wall vertical reinforcements 44 on the immediately lower story extended upward by an anchorage length L1 which is rigidly bound with the lower end of the wall vertical reinforcements 44 of a wall 42 on the story concerned by means of wires. Thus, the connecting performance is improved, welding work can be eliminated, and the beam width can be narrowed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel reinforced concrete building in which walls are provided on the upper and lower sides of a steel beam and vertical walls are provided on the walls.

[0002]

2. Description of the Related Art Generally, steel-framed reinforced concrete buildings are
After assembling the steel frame, rebar and formwork are performed, and concrete is cast to build the structure. And, the steel reinforced concrete building is designed to secure the structural strength as an integrated structure of the steel frame, the reinforcing bar, and the concrete.

[0003] However, the construction of the building is to be carried out in a state where steel columns and beam members are assembled.

[0004] Therefore, in general, in order to prevent collapse of steel members due to vibrations such as construction load and wind, the steel frame in the beam is provided with an H-shaped steel having a larger proof strength than the structural strength required for the completed building. Is used.

In such a steel reinforced concrete building, for example, as shown in FIG. 10, a beam 2 is erected between pillars 1, and a wall 3 of a reinforced concrete structure is arranged on the upper and lower floors across the beam 2. Have been. And this wall 3
Inside, as shown in FIG. 11, a wall vertical bar 4 which is a reinforcing bar extending in the vertical direction is arranged. The upper end 4a of the wall vertical streak 4 is further extended from the lower end of the wall vertical streak 4 in the wall 3 directly above the floor to secure the fixing length L1, and the lower wall streak 4 and the upper floor wall streak 4 are secured. The force is transmitted to each other by binding the wires 4 to each other with a wire or the like and bringing them into close contact. Such a technique is called a lap joint.

In this case, if H-shaped steel is used for the steel frame 5 in the beam on the floor immediately above, the upper and lower flange portions 5 of the steel frame 5 in the beam are used.
Since a and 5b are arranged on the extension of the vertical wall 4 of the wall 3, the vertical wall 4 of the wall 3 in the beam 2 is extremely bent to avoid the steel beam 5 in the H-beam. Reinforcement must be arranged in the wall 3 directly above the floor.

[0007] As another method, as shown in FIG. 12, stud bolts 6 are attached to the upper surface of the upper flange portion 5a and the lower surface of the lower flange portion 5b of the steel beam 5 in the H-section steel.
A method of welding the stud bolt 6 and the vertical wall 4 of the wall 3 to assemble a reinforcing bar is used.

[0008]

However, in such a conventional device, a wall 3 continuous above and below the beam 2 is not provided.
When a lap joint is used as a method of arranging the vertical wall 4 of the wall, an extreme bending of the vertical wall 4 of the wall 3 in the beam 2 is required. There is a possibility that the force is not effectively transmitted to the vertical wall 4 of the floor and does not serve as a lap joint. Further, the welding method using the stud bolts 6 is expensive and inferior in cost, and requires a welding process in addition to a reinforcing process, which causes a delay in the process.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a steel reinforced concrete building which can transmit force to the vertical wall of an adjacent floor satisfactorily, is inexpensive, and can shorten the construction period.

[0010]

Means for Solving the Problems In order to solve the above-mentioned problems, the invention according to the first aspect is directed to a method in which a steel beam erected between steel columns is provided in parallel with a fixed gap. A steel reinforced concrete building in which a vertical wall is inserted into the gap between the pair of steel beams.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the steel material for a steel beam is a grooved steel for a steel beam having a U-shaped cross section, and the grooved steel for both steel beams is back-to-back. It is characterized by being arranged in.

[0012] The invention according to claim 3 is the invention according to claim 1 or 2.
In addition to the configuration described in the above, the wall vertical streaks, an upper vertical portion extending vertically above the steel beam steel material, a lower vertical portion vertically extending below the steel beam steel material, A lower vertical portion and an inclined portion that connects the upper vertical portion and is inserted into a gap between the steel members for both steel beams, and a horizontal interval between the upper vertical portion and the lower vertical portion is: The width of the gap between the steel members for both steel beams is set wider than the width of the steel material, and the inclined portions of the adjacent vertical wall cross each other in an X-shape when viewed from the extending direction of the beam.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.

1 to 9 show an embodiment of the present invention.

First, the structure is explained. The steel reinforced concrete building of the present invention is constructed by assembling a steel frame, performing a reinforcing bar / form work, and pouring concrete.

The steel structure is constructed as follows. First, a plurality of steel beams 12 are arranged in a horizontal direction between a plurality of steel columns 11 arranged at regular intervals, and an intermediate steel column 25 extending vertically between these upper and lower steel beams 12. Are provided, and further, a first brace 28 and a second brace 29 are provided.

More specifically, when the steel column 11 is manufactured at a factory, the steel column side beam end gusset plates 17 are attached at predetermined intervals.
7, both ends of the steel beam 12 are attached.

The steel beam 12 is, as shown in FIG.
A pair of steel beam grooved steels 19 are arranged back to back, and an intermediate steel column gusset plate 21 is provided between the two steel beam grooved steels 19 at the center in the longitudinal direction as shown in FIG. It is assembled by fixing it with bolt nuts 23 for tightening while sandwiching it between the liner plates 22 for steel columns. This assembling can be performed in a factory, or can be performed in the site after being brought into the construction site.

Both ends 19a of both the steel beam grooved steels 19 are connected to the steel column side beam end gusset plate 1.
It is attached by bolts and nuts 23 so as to sandwich the beam end liner plate 18 and the steel column side beam end.

The upper and lower ends of the intermediate steel column 25 are attached to the gusset plate 21 for the intermediate steel column. As shown in FIGS. 2 and 5, the intermediate steel column 25 is composed of a pair of L-shaped angle steels 26 for the intermediate steel column, and the upper end portion 26 a and the lower end portion 26 b of the angle steel 26 are bolted by the nut 23. It is attached to the gusset plate 21 for the intermediate steel column.

Further, a first brace 28 and a second brace 29 are disposed diagonally within a rectangular frame formed by the steel column 11, the steel beam 12, and the intermediate steel column 25. As shown in FIG. 2, the lower end plate 28 a provided at the lower end of the first brace 28 and the upper end plate 29 b provided at the upper end of the second brace 29 are connected to the steel column side beam end gusset plate 17. Bolt and nut 23
And the upper end plate 28b of the first brace 28 and the lower end plate 29 of the second brace 29
As shown in FIG. 2, a is fixed to the gusset plate 21 for the intermediate steel column by a bolt nut 23.

The assembly of such a steel frame is as shown in FIG.
First, after the first division of the steel column 11 is erected on the ground G, the steel beam 12 pre-assembled and the orthogonal steel beam 31 in the direction orthogonal thereto are attached to the two steel columns 11 facing each other.

After the steel beams 12 and the orthogonal steel beams 31 have been mounted, the intermediate steel columns 25 are mounted. This is because the intermediate steel column 25 is fixed to the gusset plate 21 for the intermediate steel column attached to the steel beams 12 on the upper and lower floors, and two L-shaped angle steels 26 for the intermediate steel column are back-to-back with bolt nuts 23 for tightening. Fix it.

After the mounting of the intermediate steel column 25,
The second braces 28 and 29 are mounted. Attachment of these two braces 28 and 29 is performed by the gusset plate 21 for the intermediate steel column or the gusset plate 17 at the beam end on the steel column side, and the plates 28a of the braces 28 and 29,
28b, 29a and 29b are fixed with bolt nuts 23 for tightening.

In the steel reinforced concrete building according to the present invention, since the intermediate steel column 25 and the braces 28, 29 bear the horizontal force applied to the structure at the time of temporary construction, the steel beam 12 attached to the steel column 11 of the first division is orthogonal. Steel beam 3
1, and after assembling the intermediate steel column 25 and the respective braces 28, 29 attached thereto, the assembling process can be continued to assemble the steel column 11 up to the second division.

The steps of assembling the steel frames in the second and subsequent divisions are performed in the same manner as the method of mounting the steel columns 11 and the like in the first division.

As described above, by using the present invention, the steel frame assembly of the whole building can be completed in a batch process.

Next, after all the steps of assembling the steel frame are completed, a scaffold for bolting the steel frame is erected, and the steel frame is fully tightened.

Using the steel frame final fastening scaffold, a beam main reinforcement 33 and an orthogonal beam main reinforcement 34 are provided on each floor, and a beam 36 and an orthogonal beam 37 are provided.
And the beam main reinforcement 33 and the orthogonal beam main reinforcement 34 are pressed against each other. In addition, the beam stirrup 39 and the orthogonal beam stirrup 40 are arranged, the scaffold for final fastening is dismantled, and the temporary material is carried out, and rebar and formwork is performed. Reference numeral 47 denotes a column main reinforcement of the column 46, reference numeral 48 denotes a column band reinforcement, and reference numeral 49 denotes a horizontal wall reinforcement.

At this time, the reinforcement of the wall 42 of the reinforced concrete structure disposed below the beam 36 is performed.
As shown in FIG. 6, as shown in FIG. 6, the steel sheet is bent into a substantially Z-shape, and is passed through the gap between the steel beams for the steel beams 19 in the beam 36. The vertical wall stripe 44 also extends upward from the floor 45 by the fixing length L1.

The vertical wall bars 44 are arranged in a zigzag pattern when viewed in a plan view as shown in FIG. 5, and extend vertically above the steel beam grooved steel 19 as shown in FIG. An upper vertical portion 44a, a lower vertical portion 44b extending vertically below the steel beam grooved steel 19, and connecting the lower vertical portion 44b and the upper vertical portion 44a to form the two steel beam grooves; Inclined part 4 inserted into the gap of the mold steel 19
4c.

The upper vertical portion 44a and the lower vertical portion 44b
The horizontal distance H1 between the two steel beams is the same as the channel steel 19 for both steel beams.
Is formed wider than the gap width H2. And FIG.
As shown in the figure, in the gap between the two steel beams 19, both inclined portions 44c of the adjacent vertical wall 44 arranged in a staggered manner have an X-shape when viewed from the extending direction of the beam 36. Intersect.

As shown in FIG. 6, the vertical wall 44 on the immediately lower floor is extended above the floor 45 by the fixing length L1.
In this extended portion, the lower end of the vertical wall 44 of the wall 42 of the floor is bound and fixed by a wire (not shown).

As described above, by inserting the wall longitudinal bars 44 into the gaps between the two steel beam grooved steels 19, the wall vertical bars are sharply (approximately 90 °) in order to avoid the H-shaped steel, as in the related art. Since there is no need to bend the wall 42 above and below the beam 36
Can easily transmit the tensile force of the vertical wall 44 of the wall,
Further, the distance from the concrete surface to the reinforcing bar of the wall 42 and the beam 36 can be kept constant.

Further, unlike the related art, there is no need to provide the stud bolt 6, so that the welding cost is not required and the process is economical, and the number of working steps can be reduced because no welding operation is required.

Furthermore, since the wall vertical streaks 44 are bent into a substantially Z-shape to have two bending points, the number of bending points can be reduced and the gap between the steel beams for channel steel 19 can be inserted.

The interval H1 between the two vertical portions 44a of the adjacent vertical streaks 44 arranged in a staggered manner is made wider than the width H2 of the gap between the two steel beams 19, so that the wall 42 is formed.
Can be secured, and the number of bending points of the vertical wall streak 44 can be reduced.

Further, a gusset plate 21 for an intermediate steel column is disposed in a gap between a pair of grooved steels 19 for the steel beam constituting the steel beam 12, and the gusset plate 21 is provided.
, The position of the gusset plate 21 can be shifted within the gap width H2, so that the position of the intermediate steel column 25 is also shifted in the indoor and outdoor directions. Even if the positions of the upper and lower walls 42 of the beam 36 are slightly shifted in the indoor and outdoor directions, this shift can be tolerated.

Moreover, the use of a pair of grooved steels 19 for steel beams as the steel materials for steel beams can reduce the weight of the members and improve the workability during mounting. At the beam end, the two grooved steels 19 sandwich the steel column side beam end gusset plate 17 attached to the steel column 11 and are fixed with the bolts and nuts 23.
Of the beam ends, the shear force applied to the beam ends is improved, and the proof stress of the beam ends can be improved.

In the above-described embodiment, the longitudinal wall 44 is bent into a substantially Z-shape and inserted between the grooved steels 19 for both steel beams. However, the present invention is not limited to this. As long as it can be inserted between the grooved channel steels 19, the bending method of the wall vertical streaks 44 may be other than the above. In the above embodiment,
As the "steel beam steel material", the grooved steel 19 for a steel beam having a U-shaped cross section was used. However, the present invention is not limited to this. For example, two angle steels and a flat steel are combined and welded to form a U-shaped groove. Needless to say, a shape (not shown) may be formed.

[0041]

As described above, according to the first aspect of the present invention, the steel beam erected on the steel column is
It is composed of a pair of steel beams for steel beams arranged in parallel with a certain gap, and the vertical wall of the wall is inserted between the certain gaps of the steel materials for the pair of steel beams. By arranging the vertical wall of the wall substantially linearly in the beam, sufficient force can be transmitted between the vertical walls of the wall connected to the upper and lower floors. In addition, when connecting the vertical wall of the lower floor and the vertical wall of the upper floor, by arranging the vertical wall of the wall substantially linearly, compared with the vertical wall of the conventional lap joint, The connection performance of the vertical wall can be improved.

Further, as in the prior art, the stud bolt 6
Since it is not necessary to provide a welding step, welding cost is not required and the method is economical, and the number of working steps can be reduced because no welding operation is required.

Furthermore, by passing the vertical wall between the pair of steel beams, the beam width can be reduced as compared with the case where the vertical walls are arranged around the steel beams.

According to the second aspect of the present invention, in addition to the above effects, the steel material for the steel beam is a grooved steel for a steel beam having a U-shaped cross section, and the grooved steel for both steel beams is arranged back to back. The second moment of area of the beam can be more effectively improved.

According to the third aspect of the present invention, in addition to the above-described effects, the vertical wall of the wall has an upper vertical portion extending vertically above the steel material for steel beams, and a vertical wall below the steel material for steel beams. A lower vertical portion extending in the direction, and an inclined portion which connects the lower vertical portion and the upper vertical portion and is inserted into the gap between the steel members for both steel beams, and the horizontal portion between the upper vertical portion and the lower vertical portion. By setting the interval in the direction wider than the width of the gap between the steel materials for both steel beams, the strength of the wall can be secured and the number of bending points of the vertical wall can be reduced.

[Brief description of the drawings]

FIG. 1 is a steel assembly diagram of a steel reinforced concrete building according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a portion X in FIG. 1 according to the embodiment;

FIG. 3 is a view showing a state in which a reinforcing bar and concrete are provided on the steel frame of FIG. 2 according to the embodiment;

FIG. 4 is a sectional view taken along line AA of FIG. 3 according to the embodiment;

FIG. 5 is a sectional view taken along the line BB of FIG. 3 according to the embodiment;

FIG. 6 is a sectional view taken along the line CC of FIG. 3 according to the embodiment;

FIG. 7 is an enlarged view of a portion Y in FIG. 4 according to the embodiment;

FIG. 8 is an enlarged view of a Z part of FIG. 4 according to the same embodiment.

FIG. 9 is a diagram showing a vertical wall streak according to the embodiment.

FIG. 10 is a steel assembly diagram showing a conventional example.

FIG. 11 is a sectional view showing a steel beam and the like showing the conventional example.

FIG. 12 is a sectional view corresponding to FIG. 11, showing another conventional example.

[Description of Signs] 11 Steel column 12 Steel beam 17 Steel column side beam end gusset plate 19 Channel steel for steel beam (steel material for steel beam) 21 Gusset plate for intermediate steel column 22 Liner plate for intermediate steel column 25 Intermediate steel column 28 1st brace 29 2nd brace 42 Wall 44a Upper vertical section 44b Lower vertical section 44c Inclined section 45 Floor H1 Spacing between vertical bars and both vertical sections H2 Width of steel material for both steel beams

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E163 FA02 FA12 FB02 FB04 FF13 FF15 2E164 AA02 BA22 CA01 CA02 CB00 CB11

Claims (3)

[Claims] 1. A steel beam spanned between steel columns is constituted by a pair of steel beams for steel beams arranged in parallel with a certain gap, and the steel beams for the pair of steel beams for steel beams are provided in the gaps. A steel-framed reinforced concrete building characterized by inserting vertical wall bars. 2. The steel reinforced concrete building according to claim 1, wherein the steel material for steel beams is a grooved steel for steel beams having a U-shaped cross section, and the grooved steels for both steel beams are arranged back to back. 3. The vertical wall extending vertically above the steel member for a steel beam, a lower vertical portion extending vertically below the steel member for a steel beam, and A vertical portion and an inclined portion which connects the vertical portion and the upper vertical portion and is inserted into a gap between the steel members for both steel beams, wherein a horizontal distance between the upper vertical portion and the lower vertical portion is 2. The structure according to claim 1, wherein the width of the gap between the steel beams is set to be wider than the width of the steel beam, and the inclined portions of the adjacent vertical wall cross each other in an X-shape when viewed from the extending direction of the beam.
Or the steel-framed reinforced concrete building according to 2.