JP3199437B2 - Frame structure of a building composed of concrete - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skeleton structure of a steel structure made of concrete, and more particularly to a joint between a column and a beam and a mounting structure of a column.

[0002]

2. Description of the Related Art Compared with a concrete structure, a steel frame made of a steel frame has a low rigidity and a low vibration damping property. Therefore, in order to compensate for such a drawback, a composite structure (SC construction) combining a steel frame and concrete is used.

Conventionally, as a method of constructing a skeleton having such a composite structure, a method of first assembling a steel frame, further providing a temporary framework for placing concrete and reinforcing bars, and then placing concrete is adopted. I have.

[0004] Further, as a steel frame structure composed of columns and beams,
Generally, a bracket is welded in advance to the side surface of a pillar, and the bracket and the beam are joined by bolts via a joining plate, or the end plate welded to the end of the bracket and the end plate at the end of the beam are joined together. Similarly, joining with bolts is performed.

[0005] The lower end of the column has a horizontal end plate welded to the lower end in advance, and the end plate is fixed to a plurality of anchor bolts with bolts.

[0006]

[Problems to be solved by the invention] As described above, in the conventional SC construction, concrete work is performed on site from a temporary framework in addition to a steel frame, so that the number of construction steps is very large, it takes time and effort, and the construction period is long, and the cost is low. There was a drawback that it became high.

[0007] In addition, the steel frame has the advantage that the welding accuracy is improved because all welding is performed in a factory, and the construction is easy and the construction period can be shortened because only on-site work is performed by bolt connection. However, there are the following disadvantages.

[0008] Even in the case of welding at a factory, if the column is a steel pipe, difficult welding is required due to the closed cross-section, and if a diaphragm is used to increase the cross-sectional strength, it takes a lot of time to process and install it, and production Poor.

[0009] The number of bolts for joining the bracket and the beam increases, resulting in poor work efficiency.

[0010] Similarly, the lower end of the column is fixed to the anchor bolts with many bolts, so that workability is poor and the number of anchor bolts is increased.

[0011] Since the bracket protrudes from the side of the pillar, the transportation efficiency is reduced.

[0012] In the case where the end plate is welded to the end of the bracket, it may be necessary to protrude the end plate in the up and down direction of the bracket to increase the joining strength and increase the number of bolts. Not only does this hinder the floor laying, but also makes the fireproof coating less fit.

[0013] In particular, the pillars are one-piece design and one-piece production for realizing a specific structure, and the productivity is low.

[0014] The present invention solves such conventional disadvantages and eliminates the need to perform concrete casting on site.
In addition, there is no need for welding at the factory and site, and since there is no protrusion like a bracket on the side of the pillar, it has excellent transport efficiency, and furthermore, a concrete composite structure that reduces the number of construction steps at the site It is intended to provide a skeleton.

[0015]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a method of filling concrete between a synthetic steel pipe column having a double pipe structure in which the space of inner and outer pipes is filled with concrete, and a flange of H-section steel. A diaphragm is installed at the upper end of the steel pipe column, the end plate at the end of the beam is engaged with the groove provided on the upper surface of the diaphragm, and another diaphragm is provided at the upper end of the end plate. The upper end of the end plate is engaged with the groove on the lower surface of the diaphragm, and the nut is screwed to the steel rod connected to the base side and penetrating the steel pipe column and the end plate from above the upper diaphragm. It is characterized by being fixed.

The second invention of this application is characterized in that the space between the end plates is filled with mortar.

In a third aspect of the present invention, the steel pipe column is a round steel pipe column, each diaphragm is circular, and a notched circular end plate at the beam end is provided in a circular groove of the diaphragm. It is characterized by engaging.

Further, the fourth invention of the present application is directed to the first invention.
In the inventions of (1) to (3), the lower end of the steel pipe column is engaged with a groove of a diaphragm installed on a foundation.

According to a fifth aspect of the present invention, the foundation anchor bolt is projected from the diaphragm installed on the foundation, and the diaphragm is tightened and fixed by a nut screwed to the foundation anchor bolt. It is in the steel structure of the building.

Further, in the fifth aspect of the present invention, it is conceivable that the steel rod is connected via a nut for tightening the diaphragm.

[0021]

According to the above arrangement, concrete is filled in the space between the inner pipe and the outer pipe by using a steel pipe column as a double pipe, and concrete is filled between the flanges by using a beam as an H-section steel. Since it has a structure synthesized in a factory in advance, there is no need to cast concrete on site.

Further, since there is no protrusion such as a bracket on the side surface of the pillar, and since the diaphragm is fixed and the beam is joined with the nut for tightening the steel rod, it is not necessary to tighten many bolts. Similarly, the pillar is also fixed to the anchor bolt of the foundation with a nut that connects one steel rod, so the number of bolts and the number of tightening steps are significantly larger than those that fix the end plate using many bolts Decrease.

[0023]

In the drawings, (1) is a steel pipe column made of a round steel pipe, and this steel pipe column (1) has a double structure consisting of an inner pipe (2) and an outer pipe (3). The space between the outer pipe (3) and the inner pipe (2) is filled with concrete (4) in advance.

(5) shows a diaphragm for fixing columns installed on a foundation, (6) shows a lower diaphragm for fixing a beam, and (7) shows an upper diaphragm. On the upper surface of the pillar fixing diaphragm (5), there is formed a circular groove (8) which approximately matches the cross section of the pillar (1). On the other hand, in the upper and lower diaphragms (6) and (7) for beam fixing, grooves (9) and (9) are formed on the lower surface or the upper surface, which are also substantially similar to the cross section of the column (1). The grooves (10) and (10) having a smaller width are formed on the surface. (12) is a steel rod made of a different-diameter steel rod inserted into the inner pipe (2) of the column (1).
Male screws (13) (14) are integrally formed at the upper and lower ends and on the way. Each of the diaphragms (5), (6), (7) has through holes (15), (15),.

The beam (17) is made of an H-shaped steel, and has two upper and lower main reinforcing bars (1) between upper and lower flanges (18) and (18).
9), attach the spiral muscle (20) around the main muscle (19), and attach these spiral muscles (1).
9) Concrete (21) filled so as to cover (20). A notch (22) is provided at the end of the web to fill the left and right concrete (21).
Are wrapped around each other.

Further, an end plate (23) bent to the same curvature as the cross section of the steel pipe column (1) is fixed to the end face by welding. This end plate (23)
For example, it is formed by vertically dividing a short steel pipe. (twenty four)
Is a stud member protruding outward from the end plate (23).

Next, the structure of the skeleton using the steel pipe columns (1) and the beams (17) will be described in the order of construction.

First, as shown in FIG. 2, an anchor bolt (27) made of the same steel rod as the steel rod (12) is placed on a concrete foundation (26) cast in place. It is buried so that it protrudes. A fixing plate (28) is externally fitted to a lower end of the anchor bolt (27), and a fixing nut (29) is screwed to a lower side thereof.

Next, at the upper end of the anchor bolt (27),
Insert the pillar fixing diaphragm (5) into the through hole (1).
The upper end of the anchor bolt (27) is inserted into 5), and the diaphragm (5) is set on the foundation (26). And the male screw (30) at the top of the anchor bolt (27)
Then, a nut (31) serving also as a coupler is screwed in, and the diaphragm (5) is tightened and fixed. Further, the lower end of the steel rod (12) inserted into the steel pipe column (1) is screwed into the coupler nut (31), and is erected upward. In this state, the steel pipe column (1) is installed so as to cover the steel rod (12) from above, and the lower end thereof is connected to the foundation (26).
The upper diaphragm (5) is set in engagement with the groove (8) on the upper surface.

After attaching the steel pipe column (1) as described above, as shown in FIG. 1, a lower diaphragm (6) for fixing a beam (17) and a groove (9) on the lower surface thereof are provided at the upper end thereof. The upper end of the column (1) is engaged with the steel bar (12), and is fixed from above by a nut (32) screwed to the steel rod (12).

Next, the beam (17) is suspended, and the lower end of the end plate (23) is engaged with the groove (10) on the upper surface of the diaphragm (6) at the upper end of the steel pipe column (1). Install. At this time, a support plate (33) bent in the same manner is installed on the remaining portion of the groove (10) where the end plate (23) is not engaged with the lower end thereof engaged with the groove (10). . In this state, the space surrounded by the end plate (23) and the support plate (33) is filled with the non-shrink mortar (30). After that, the upper diaphragm (7) is placed on top of it.
The end plate (23) and the upper end of the support plate (33) are engaged with the groove (10) on the lower surface and installed.
Tighten it with the nut (34) screwed to the steel rod (12).

Then, if there is an upper floor,
Another steel bar (12) is connected using a coupler nut (35), and the upper floor column (1) is similarly engaged with the groove (9) on the upper surface of the upper diaphragm (7). It is installed and fixed, and a beam (17) is similarly joined to the upper end thereof (not shown).

In the figure, since the beam (17) is joined only in one direction, the support plate (33) is provided on the other part without the end plate (23). When two or more protrude in a plurality of directions, it is not always necessary to provide the support plate (33).

FIG. 5 shows an example of a case where this frame structure is assembled on an irregular site. Thus, the beam (17) is
Since the direction can be freely changed in the circumferential direction in the grooves (10) in the diaphragms (6) and (7), it is possible to easily cope with an irregular site.

FIG. 6 shows a case where the steel pipe column (1) is constructed by simply cutting a double pipe into a predetermined length as described above. (1)
By appropriately changing the length of the vehicle, it is possible to easily cope with such a slope. Further, since the height of the beam (17) can be arbitrarily changed, a space having a change such as a skip floor or a stairwell can be relatively easily created.

[0036]

According to the present invention, the following effects can be obtained.

A. Since the steel pipe column is a double pipe, concrete is filled between the inner pipe and the outer pipe, and the beam has a composite structure in which concrete is filled between the flanges.
It is not necessary to cast concrete on site, and the number of man-hours for on-site construction is greatly reduced, so that the construction period can be shortened and the construction cost can be greatly reduced.

B. There is no need to weld the bracket to the column,
Since it is only necessary to cut the steel pipe column to a predetermined length, the manufacturing cost of the column is greatly reduced.

C. The end plate of the beam is fastened and fixed using the steel rod and the diaphragm inserted into the column.
The steel bar can be fixed only by tightening it with one nut, so that it is not necessary to tighten many bolts as in the prior art, and the number of parts is reduced and the number of construction steps on site is greatly reduced.

D. At this time, since the end plate of the beam is engaged with the groove of the diaphragm, not only positioning is easy, but also sufficient strength can be provided in the horizontal direction.

E. Since the end plate can be arbitrarily rotated and mounted in the circumferential direction of the groove, it can easily cope with an irregular site where the angle of the corner of the outer wall does not become a right angle. .

F. Since the steel pipe column is fastened and fixed by the steel rod inserted into the steel pipe column and connected to the anchor bolt side, the end plate of the steel pipe column is fixed to the anchor bolt in the conventional manner. Differently, the bolting man-hour is also reduced.

G. Since the steel tube column does not protrude the bracket or the end plate for fixing to the foundation, the transportation efficiency is improved.

H. As described above, since the steel pipe column is obtained by simply cutting the steel pipe to a predetermined length, by appropriately changing the cut length, the steel pipe column can be easily adapted to a slope. Alternatively, a structure such as a skip floor can be easily configured.

I. In addition, since only one anchor bolt is required, reinforcement of the foundation, that is, construction work of the foundation is facilitated.

J. Since the end plate of the beam fits within the cross section of the column and there are no protrusions to the top and bottom or left and right of the beam, there is an effect that the floor can be easily laid and the fireproof coating can be easily made. .

K. Steel pipe columns, diaphragms, steel rods, etc. can be used almost in common in any building, and are designed to be industrially produced by designing a structure as a versatile and interchangeable part. Productivity including

L. For this reason, mass production is possible and significant cost reduction is possible.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a column-beam joint portion showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a mounting structure of a lower end of a pillar.

FIG. 3 is a sectional view of a beam.

FIG. 4 is an exploded perspective view of a beam joining portion.

FIG. 5 is a plan view showing an example of a case where the present invention is implemented at the time of irregular shape.

FIG. 6 is an elevation plan view when the same is applied to a slope.

[Explanation of symbols]

 (1) Steel pipe column (2) Inner pipe (3) Outer pipe (4) Concrete (5) Diaphragm (6) Diaphragm (7) Diaphragm (8) Groove (9) Groove (10) Groove (12) Steel rod (17) ) Beam (21) Mortar (23) End plate (26) Concrete foundation (27) Anchor bolt (30) Mortar (31) Coupler nut (34) Nut

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tomoji Iijima 6-2-27 Nakanoshima, Kita-ku, Osaka Sekisui House Co., Ltd. (72) Inventor Yoshihiro Yoshizaki 6-27 Nakanoshima, Kita-ku, Osaka Sekisui Inside House Co., Ltd. (72) Inventor Shigekazu Yokoyama 6-2-27 Nakanoshima, Kita-ku, Osaka-shi Sekisui House Co., Ltd. (72) Inventor Satoko Shimizu 6-2-27 Nakanoshima, Kita-ku, Osaka Sekisui House Co., Ltd. (58) Investigated field (Int.Cl. ⁷ , DB name) E04B 1/30

Claims (6)

(57) [Claims] 1. A composite steel pipe column having a double pipe structure in which a space between an inner pipe and an outer pipe is filled with concrete, and a composite beam filled with concrete between H-section steel flanges. At the upper end of the diaphragm, the end plate at the beam end is engaged with the groove provided on the upper surface of the diaphragm, and another diaphragm is placed on the upper end of the end plate, and the end plate is inserted into the groove on the lower surface of the diaphragm. Synthesizing concrete characterized in that the upper end of the plate is engaged, and the concrete is fixed to a steel rod connected to the foundation side and penetrating through the inner tube and the end plate with a nut screwed from above the upper diaphragm. Framed structure of the building. 2. The frame structure of a concrete composite building according to claim 1, wherein the space between the end plates is filled with mortar. 3. The steel pipe column is a round steel pipe column, each diaphragm is circular, and a notched circular end plate at a beam end is engaged with a circular groove of the diaphragm. A frame structure of a building in which the concrete according to claim 1 is synthesized. 4. A steel pipe column having a lower end engaged with a groove of a diaphragm installed on a foundation.
A frame structure of a building obtained by combining the concrete according to any one of the above. 5. The frame structure of a concrete composite building according to claim 4, wherein the foundation anchor bolt is projected from the diaphragm installed on the foundation, and the diaphragm is tightened and fixed with a nut screwed to the foundation anchor bolt. . 6. The framework of a concrete composite building according to claim 5, wherein a steel rod is connected via a nut for tightening the diaphragm.