JP2000345624A - Joining structure of column with beam, and its enclosure material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a reinforcement surrounding plate which is also used for a driving form in a joining part, firmly form a composite structure comprising a reinforced concrete column and a steel beam while preventing the breakage of the concrete, greatly reduce temporarily provided jigs in number, and easily provide inexpensive structure. SOLUTION: Steel beams 1, 1 are stretched over a beam supporting member 10 erected around a column 45 to be formed with their joining end parts 2 abutted on each other. The beams are joined with each other, and the beam 1 is joined with the beam support member 10, and a reinforcement surrounding plate 35 arranged along a side of the column is fixed to a fitting steel plate 8 of the beam 1. A structural reinforcing bar 40 for column is arranged, a concrete 43 is placed to constitute the structure of the column and the beam in which the reinforced concrete column is joined with the steel beam. In the reinforcement surrounding plate 35, a bearing plate 26 is diagonally fixed to an inner corner part of a substrate to constitute a corner part of the driving form for column with its tip upward in the transverse direction, and a reinforcement piece 31 is formed on the tip of the bearing plate 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an enclosing member used for joining a column composed of a steel beam and a concrete column, and a joining structure of a column and a beam using the enclosing member.

[0002]

2. Description of the Related Art Generally, when constructing a building frame,
Both the columns and beams had a steel structure or a reinforced concrete structure. In this case, the beam portion has a large influence on the bending of the member due to its own weight, and it is desired that the beam has a light-weight steel structure. In this case, considering the connection with the column, the column was generally a steel reinforced concrete structure.

[0003]

However, when the above-mentioned conventional steel-framed reinforced concrete structure columns are used, there is a problem that the number of construction days and costs are disadvantageous as compared with the reinforced concrete structure columns. On the other hand, when the column is made of a reinforced concrete structure, there is a problem that the connection structure of the column and beam becomes complicated and the construction becomes complicated, or the cross section becomes large, the internal space becomes narrow, and the effect on the finished structure is great. .

[0004] Regardless of the structure, there is a problem in that concrete is reliably filled under the steel beam buried in the columnar concrete.

[0005]

According to the present invention, however, the tip of the steel beam is placed on the beam support member and the steel beams are interconnected and buried in concrete. In addition, since we used an enclosure material with a reinforcing fixing piece,
The strength of the connection was increased and the construction was simplified.

That is, according to the present invention, a joint end portion of a steel beam is erected on a beam support member arranged along the center of a column to be formed, and the steel beam and the steel beam and the beam support member are joined to each other. ,
A reinforcing shroud attached to the outer surface of the column to be formed was attached between the side surfaces of the adjacent steel beams, and a structural reinforcing bar for a predetermined column was arranged to join the reinforced concrete column and the steel beam. In the structure, the reinforcing shroud is connected to the steel beam and covers a side portion of the column to be constructed, and a corner of the column to be constructed to be connected between the adjacent mounting plates. The enclosure covers a corner of a pillar to be constructed, and a support projecting from the inner wall of the substrate in a lateral and inward direction with its tip facing upward. The support plate is a joint structure between a column and a beam, characterized in that the support plate has a substantially vertical reinforcing rib protruding from a distal end thereof. Further, in the above, it is a joint structure of a column and a beam in which a support plate is fixed at least at an upper portion or a lower portion of an enclosing member.

[0007] A member constituting a corner portion of a reinforcing shroud that can be attached to an outer surface of a concrete column used in a joint portion of a column and a beam, the outer surface of the column. A support plate is provided on the inner side of the substrate attached to the base plate so as to face upward from the horizontal direction to improve the filling property of the concrete and sufficiently transmit the support pressure from the concrete. It is an enclosing member characterized in that reinforcing ribs are continuously provided upward inside the pressure plate. In the above,
The board can be connected to a mounting iron plate that forms a side of the reinforcing shroud fixed to the side surface of the beam, and is provided with two first closing pieces arranged in a substantially C-shape in a plane, and between the first closing pieces. And a second closing piece disposed at the corner so as to connect the gap on the narrow side of the frame, and is integrally formed so as to form the corner obliquely. An enclosing member in which a pressure plate is fitted and fixed to the inner wall of the substrate, and both ends of the reinforcing ribs are fixed to the inner wall of the substrate.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A beam support member 10 is erected along the center of a reinforced concrete column 45 to be formed, and beams 1 made of steel frame are erected on the beam 1 at abutting ends thereof. Beam 1,
1 and the beams 1 and 1 and the beam support member 10 are joined together, and the connecting member 12 for fixing the beam support member for the next floor is fixed. The beam 1 has a mounting iron plate 8 for fixing the surrounding material.
Has been fixed. The mounting iron plate 8 forms a side portion of the reinforcing enclosure plate and is arranged along the outer surface of the column (also serves as a part of a formwork when the column is cast into concrete). Adjacent beam 1,
1, a reinforcing enclosing plate 35 is disposed between the side surfaces of the mounting iron plate 8,
8

The reinforcing shroud 35 can be attached along the side surface of the pillar to be constructed, and the support plate 26 is fitted and fixed to the inside corner of the substrate 21 whose both ends are fixed to the mounting iron plate 8. ing. The board | substrate 21 is arrange | positioned along the outer surface of a pillar, and comprises the corner part of the driving form for pillars. The support plate 26 is arranged obliquely with respect to the horizontal so that the front end side (long side) 28 side is located higher than the base end side (short side) 27 side, and the reinforcing rib 31 extends upward along the front end. It is installed continuously for one.

[0010] Subsequently, a structural reinforcing bar for the pillar is arranged, a formwork for the pillar is constructed in addition to the connection portion, concrete is cast, and the reinforced concrete pillar and the steel beam are formed. Construct a building structure of joined columns and beams.

[0011]

Embodiment 1 An embodiment of an enclosure according to the present invention will be described with reference to FIGS.

A member disposed between the side surfaces of the adjacent beams (beams to be connected) and arranged at a position where it can be added along the side surface of the column to be constructed (also serves as a formwork when the column is cast into concrete). ), The substrate 21 is formed by bending a steel plate into a shape located at a corner of a column to be constructed (forming a corner of a pillar driving formwork). The substrate 21 includes first closing pieces 22, 22 located in a C-shape (substantially right angle) and second closing pieces 23 arranged to connect narrow edges of the first closing pieces 22, 22. It is composed integrally from. The first closing piece 22 is formed so as to be able to overlap and be connected to the mounting iron plate 8 (constituting the side of the reinforcing enclosure) fixed to the side surface (web) of the beam 1. Is formed with bolt holes 24, 24 corresponding to the bolt holes of the mounting iron plate.

A substantially trapezoidal pressure plate 26 is fitted and fixed to the inside of the upper portion of the substrate 21. The support plate 26 has a short side (upper bottom) 27 fixed to the inner surface of the second closing piece 23 and both oblique sides 29, 29 fixed to the inner surfaces of the first closing pieces 22 and 22, respectively. Further, the support plate 26 is arranged obliquely with respect to the horizontal so that the long side (lower bottom) 28 side is located above the short side 27 side. The slope is formed so that the lower surface of the support plate 26 is filled with concrete after the concrete is cast and the close contact between the concrete and both surfaces of the support plate 26 is maintained, and the angle between the horizontal and the horizontal is slightly upward from about 45 degrees. It is desirable that the shape be inclined (about 1:10).

Further, the long side (free edge) 2 of the support plate 26
8, the reinforcing ribs 31 are integrally connected in an upward direction, and both ends of the reinforcing ribs 31 are respectively connected to the first closing pieces 22 and 2.
2 is fixed to the inner surface. The support plate 26 and the reinforcing rib 31 are formed by bending a single steel plate.

In addition, if necessary, a through hole 33 for inserting a structural reinforcing bar is formed in consideration of fitting with a structural reinforcing bar for a column in the reinforcing shroud.

In the above, the long sides 28 and the reinforcing ribs 31 of the support plate 26 prevent the spread of the substrate 21 mainly when an external force is applied, and can increase the strength of the joint.

Next, the support plate 26 and the reinforcing ribs 31 are similarly attached to the lower portion of the substrate 21. The support plate 26,
Reference numeral 26 corresponds to the height position of the upper and lower flanges 3 and 4 of the steel beam 1 to be joined.

As described above, the enclosing member 35 of the present invention
(FIG. 6).

In the above embodiment, the corners of the substrate 21 are cut off so as to prevent stress from concentrating on the corners when an external force acts on the joints.
2 and the second closing piece 23, the angle of which is about 135 ° in a plan view.
3 may be omitted and the corner may be set to about 90 degrees in plan view. Further, if the second closing piece 23 is formed in an arc shape (a quarter circle or the like), similarly, concentration of stress on the corner can be prevented.

In the above embodiment, the support plate 26
Is fixed to the upper and lower portions of the substrate 21, but it is necessary to provide at least the upper and lower flanges 3 and 4 of the steel beam 1 to be used, and further to another position (for example, the central portion).
(Not shown).

In the above-described embodiment, the positions of the mounting bolt holes 24, 24 are determined in consideration of the shape of the supporting plate 26 and the shape of the reinforcing ribs 31 so as to be connectable to the mounting iron plate 8 and to be bolted. Although it is set to a position where the fastening work can be performed, a notch may be formed in the reinforcing rib 31 in accordance with the bolt holes 24, 24 in some cases (not shown).

[0022]

Embodiment 2 Another embodiment of the enclosing member of the present invention will be described with reference to FIGS.

In the first embodiment, the support plate 26 and the reinforcing rib 31 are formed of one steel plate, but may be formed of two members (FIGS. 8 and 9).

In this case, a reinforcing rib 31 made of a separate member is fixed slightly inside (closer to the short side 27) than the edge of the long side 28 of the support plate 26. Also in this case, both ends of the reinforcing rib 31 are fixed to the inner walls of the first closing pieces 22 of the substrate.
In this case, forming the reinforcing rib 31 thicker than the supporting plate 26 is more effective in terms of strength.

If necessary, a notch 34 is formed in the support plate 26 in consideration of the fitting with the structural steel bar for a pillar. The through hole 33 as in the first embodiment may be used (not shown).

In the first embodiment, the reinforcing ribs 3
1 is formed along the long side 28 of the support plate 26, but in the center of the upper surface of the support plate 26, the short side 27 of the support plate 26, the long side support plate, and the inner wall of the second closing piece are contacted. The enclosing member 35 can be configured by integrally fixing a triangular reinforcing plate (FIGS. 11A and 11B).

[0027]

Embodiment 3 Next, an embodiment of the joining structure of the present invention using the enclosing member of Embodiment 1 will be described with reference to FIGS. 1 to 5 and FIG. A joining structure in which beams from four directions are joined to one pillar will be described.

(1) The beam support member 10 is erected at the position where the column 45 is to be installed on the existing floor slab 37, and the lower end of the beam support member 10 is connected to the lower floor beam support member 10 protruding above the slab. It is fixed to the member 12 with bolts and nuts via a joint plate (FIG. 1A). The beam support member 12 has a flat cross-shaped beam receiving plate 11 attached to the upper surface of a column. The pillars of the beam support member 10 and the connecting member 12 are formed in a cross-shaped cross section from two angle members (section steel having an L-shaped cross section). Here, the shape cross section of the beam support member is arbitrary,
Since the concrete only needs to have strength enough to hold each steel beam at a predetermined position until solidification is developed, a member having a large cross section such as a steel column having a steel-framed reinforced structure is not required.

(2) Next, the beam receiving plate 11 of the beam supporting member 10
Steel beams 1 and 1 made of H-section steel having notched edges 5 and 6 formed by cutting flanges 3 and 4 at an angle (approximately 45 degrees in plan view).
(FIG. 1 (b), FIG. 2, FIG. 3 (a)). In the steel beam 1, bolt holes for joining are formed in the flanges 3, 4 and the web 7, and can be attached to the side of the column to be formed at the position where the column form is formed on both sides of the web 7 ( The mounting iron plates 8, 8 (which also serve as the driving formwork) are fixed in advance. Bolt holes 9, 9 for fixing the enclosing member 35 are formed on the tip side of the mounting iron plate 8.

(3) Next, a flat L-shaped joint plate 15 is placed on the upper surface of the lower flange 4 of the adjacent steel beams 1 and 1,
The adjacent lower flanges 4 of the steel beams 1 and the beam receiving plate 11 of the beam supporting member 10 are connected and fixed to each other with bolts and nuts. If necessary, the webs 7 of the adjacent steel beams 1 and 1 are connected and fixed by bolts and nuts via a joint plate 16 having an L-shape in plan view (FIG. 1C).

(4) A connecting member 12 having a beam receiving plate 13 having the same shape as the beam receiving plate 11 is placed on the upper flanges 3, 3 of the steel beams 1, 1. Adjacent steel beams 1, 1
L-shaped joint plate 1 on the lower surface of upper flanges 3, 3
7 and 17, the upper flanges 3 and 3 of the adjacent steel beams 1 and 1 and the beam receiving plate 13 of the connecting member 12 are connected and fixed by bolts and nuts (FIGS. 1 (c) and 3). (B)).

(5) Subsequently, an enclosing member 35 is disposed between the mounting iron plates 8, 8 of the adjacent steel beams 1, 1, and the enclosing member 35
The first closing pieces 22, 22 and the mounting iron plates 8, 8 are connected by bolts and nuts (FIGS. 6A and 6B).

(6) Next, the structural reinforcing bars 40, 40 for columns to be arranged from above are arranged between the mounting iron plates 8, 8 of the adjacent steel beams 1, 1, and between the enclosing members 35. At this time, if necessary, a through hole 33 may be previously formed in the support plate 26 of the enclosing member 35, and the structural reinforcing bar 40 may be inserted through the through hole 33.

(7) Next, the structural reinforcing bars 40, 40 are arranged at predetermined positions (FIG. 4), and necessary hoop reinforcing bars 41, 41 are arranged above or below the enclosing member 35 (enclosing member). 3
5 has the same effect as the hoop reinforcing bar, so that the hoop reinforcing bar is unnecessary at the position of the enclosure 35). Also, necessary form frames 42, 42 for columns are constructed below the mounting iron plates 8, 8 and the enclosing members 35, 35 (FIG. 1D). It is not necessary to construct a new formwork at the position of the material 35), and the necessary deck plate (or formwork) and structural reinforcing steel for the floor are arranged (not shown). Formwork 42 below the enclosure 35 in the above.
Can be any of a temporary formwork and a driving formwork having the same shape as the reinforcing shroud.

(8) Next, necessary reinforcement and support are applied to each formwork, and concrete for columns and floors is cast.
If the unnecessary forms are removed after the concrete has solidified, the reinforced concrete column 45 of the present invention is constructed, and the joint structure between the column and the beam can be constructed. In the figure, reference numeral 43 denotes solidified concrete constituting a pillar.

(9) In the joint structure of the column and the beam constructed in this embodiment, the steel beams 1 and 1 are integrally connected to each other, and the steel plate 1 for mounting and the column 45 in the enclosing member 35 are in concrete. Buried in the reinforced concrete columns 45
And the steel beam 1 can be integrally joined.

Further, the joint is reinforced by the mounting iron plate 8 made of a steel plate and the enclosing member 35, and the enclosing members 35, 35
Since the support plate 26 and the reinforcing rib plate 31 are provided inside the housing, the enclosing member 35, the mounting iron plate 8, and the concrete are integrally formed.

Further, the closing plates 22, 23 and the supporting plate 26 of the enclosing member 35 disperse the stress in the joint portion, and improve the strength of the connection structure (joint) of the column and beam. If the lower surface of the lower flange 4 or the lower surface of the upper flange 3 of the steel beam 1
Even when the void portion of the concrete is partially formed, the supporting plates 26, 26 with the reinforcing ribs 31 provided at the same height as the flange can minimize the reduction in the strength of the portion.

Therefore, the stress (bending stress, shearing stress) applied to each steel beam 1 is transmitted to the concrete at the joint via each flange and web, and the iron plate 8 for mounting and the board 21 The power is efficiently transmitted to the concrete 43 of the column 45 and the structural reinforcing bar 40 via the pressure plate 26 and the reinforcing rib 31. Therefore, even if an unexpectedly large external force acts, the collapse of the concrete 43 in the portion can be delayed, and the portion can be effectively reinforced.

Further, since the steel beams 1 and 1 can be held in a predetermined position until concrete is cast and solidified by the beam supporting member 10, the number of temporary members is greatly reduced, and the steel beam 1 and the reinforced concrete column are reduced. 45 can be efficiently constructed. In addition, since the reinforcing steel plate for the pillar can be constructed in this portion by the mounting iron plate 8 and the surrounding material 35, the work for constructing the formwork for the pillar can be simplified.

The beam supporting member 10 on each floor is connected to the connecting member 1.
Since it is connected up and down via 2 and the frame can be constructed independently for each floor, temporary work such as scaffolding at a high place in advance is not required, and work safety can be secured. In addition, since the skeleton can be constructed by repeating the same operation for each floor, the entire building can be efficiently constructed.

Further, the joint ends 2 of the steel beams 1 and 1 are constructed in the column formwork (the mounting iron plate 8 and the enclosing member 35) and buried in the concrete 43 of the column. Can be prevented. In addition, since the joint is not exposed in the middle of the steel beam 1, the construction is easy (without hindering later finishing work or the like), and a free space design can be performed.

(9) Other Embodiment 1 In the third embodiment, even when the enclosing member 35 of the second embodiment is used, a joint structure can be constructed by a similar construction procedure (FIGS. 5 and 10). ).

2 In the above-described embodiment, the joint structure in which four steel beams 1 and 1 intersect at right angles has been described. However, when the steel beams 1 and 1 intersect at an angle other than right angle, three beams and two beams Can also be applied to a junction structure where In this case,
Corresponding to the cross-sectional shape of the pillar to be formed (the shape of the pillar formwork)
The shape of the notched edges 5 and 6 at the joint end 2 of the steel beam 1, the shape of the mounting iron plate 8, the shape of the substrate 21 of the enclosure 35, and the like are selected and formed. Also, the planar shapes of the beam supporting members 10 and the beam receiving plates 11 and 13 of the connecting member 12 are appropriately changed according to the shape of the steel beam 1 to be connected.

[0045]

According to the present invention, the joint is surrounded by a reinforcing plate composed of a reinforcing plate and an enclosing material, and a supporting plate and a reinforcing rib are provided inside the enclosing material. This has the effect of preventing the destruction of concrete and forming a strong column-beam joint.

In addition, since a reinforcing shroud can be formed at the joint, a composite structure composed of reinforced concrete columns and steel beams can be easily and inexpensively constructed by greatly reducing temporary jigs. is there.

[Brief description of the drawings]

1 (a) to 1 (d) are schematic side views showing a construction process of a joint structure of the present invention.

FIG. 2 is a plan view showing a state in which a beam support member is placed at a planned construction position according to the present invention.

3A and 3B are plan views during construction of the present invention, wherein FIG. 3A shows a state before beams are joined, and FIG. 3B shows a state after beams are joined to each other.

FIG. 4 is a plan view showing a state after an enclosing member has been attached and structural reinforcing bars for columns have been arranged during construction.

FIG. 5 is a plan view showing a state after an enclosing member has been attached and structural reinforcing bars for columns have been arranged during construction of another embodiment.

6A is a plan view and FIG. 6B is a front view of the enclosing member of the present invention.

FIG. 7 is an enlarged cross-sectional view taken along line AA of FIG.

8 (a) is a plan view of another enclosing material of the present invention, FIG.
(B) is a front view.

FIG. 9 is an enlarged cross-sectional view taken along line BB of FIG.

FIG. 10 is a plan view showing a state after an enclosing member has been attached and structural reinforcing bars for columns have been arranged during construction of another embodiment of the present invention.

11 (a) is a plan view of another enclosing material of the present invention, FIG.
(B) is a partial cross-sectional view taken along line CC of (a).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel beam 2 Joint end of steel beam 3 Upper flange of steel beam 4 Lower flange of steel beam 5 Notch edge (upper flange) 6 Notch edge (lower flange) 7 Web of steel beam 8 Reinforcement plate 9 Bolt hole of reinforcement plate DESCRIPTION OF SYMBOLS 10 Beam supporting member 11 Beam receiving plate (beam supporting member) 12 Connecting member 13 Beam receiving plate (connecting member) 15 Joint plate 16 Joint plate 17 Joint plate 21 Substrate 22 First closing piece 23 Second closing piece 24 Bolt hole (No. 1 closing piece) 26 supporting plate 27 short side (supporting plate) 28 long side (supporting plate) 29 hypotenuse (supporting plate) 31 reinforcing rib 32 notch (reinforcing rib) 33 through hole (supporting plate) 34 notch (supporting plate) ) 35 Enclosure material 37 Existing floor slab 40 Structural reinforcing bar for column 41 Hoop reinforcing bar for column 42 Formwork for column 43 Concrete (column) 45 column

Claims (5)

[Claims] 1. A connecting end portion of a steel beam is erected on a beam supporting member arranged along the center of a column to be formed, and the steel beam and the steel beam and the beam supporting member are connected to each other. Between the side surfaces of the steel beam, a reinforcing shroud attached to the outer surface of the column to be formed is attached, and a structural steel bar for a predetermined column is arranged to join a reinforced concrete column and a steel beam. The reinforcing shroud may be connected to the steel beam to cover a side of a column to be constructed, and may be connected between the adjacent mounting iron plates to cover a corner of the column to be constructed. And a supporting plate that covers the corners of the pillar to be constructed, and a supporting plate that is provided on the inner wall of the substrate in a lateral and inward direction with the tip facing upward. The supporting plate has a substantially vertical reinforcing rib protruding at a distal end thereof. Joint structure. 2. The joint structure between a column and a beam according to claim 1, wherein a support plate is fixed to at least an upper portion or a lower portion of the enclosure member. 3. A member constituting a corner portion of a reinforcing shroud that can be attached to an outer surface of a pillar when forming a concrete pillar used for a joint portion of the pillar, wherein the outer surface of the pillar is provided. A support plate is provided on the inner side of the substrate attached to the base plate so as to face upward from the horizontal direction to improve the filling property of the concrete and sufficiently transmit the support pressure from the concrete. An enclosing material characterized by having reinforcing ribs continuously provided upward inside the pressure plate. 4. The board includes two first closing pieces that can be connected to a mounting iron plate that constitutes a side of the reinforcing enclosure fixed to the side surface of the beam, and that are arranged in a substantially C-shape in a plane. A second block disposed at the corner so as to connect a narrow gap between the first block pieces;
The enclosing material according to claim 3, comprising a closing piece, and integrally formed so as to form a corner at an angle. 5. The enclosure according to claim 3, wherein the support plate is fitted and fixed to the inner wall of the substrate, and both ends of the reinforcing rib are fixed to the inner wall of the substrate.