JP3323458B2 - Joint, joint structure between column and beam, and method for joining the joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining tool for joining a column and a beam, a joining structure between a column and a beam, and a joining method therefor.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 14, a prestressed concrete structure comprises a prestressed concrete column (hereinafter, referred to as a PC column) 36 and a precast concrete beam (hereinafter, referred to as a PC beam) 37, a PC steel wire 38.
To give a prestress and join. This pillar 3
6 and the PC beam 37 can be joined by the PC beam 3
After inserting the PC steel wire 38 from 7 to the PC column 36,
The PC steel wire 38 is tensioned with a jack, and the PC column 36 and the PC
The beam 37 was joined.

[0003]

However, the connection between the PC column and the PC beam has a problem that it takes time and effort since a PC steel wire must be inserted from the PC beam to the PC column at the site. . In high-rise buildings,
It is difficult to increase the span due to the strength of the column axial force, and the seismic stress is dominant over the load capacity of the vertical stress, which is an advantage of the prestressed concrete structure. Therefore, the joint between the prestressed PC column and the PC beam was liable to break down when a large earthquake occurred because the prestressing force and the bending stress during the earthquake were concentrated.

The present invention has been made in view of the above-mentioned problems, and has as its object to completely separate a shear stress and a bending stress acting on an end of a beam without applying prestress. Even though it is easy to join PC beams and columns (prestressed concrete columns: PC columns, RC columns, steel tube concrete columns) with a connector that resists only the tensile force generated by bending stress, and to join high-rise buildings due to a large earthquake The purpose is to prevent damage to the parts.

[0005]

According to a first aspect of the present invention, a pair of fixing heads each having a nut are joined by a core rod and a steel pipe, and solidified in the steel pipe. The body is fitted and resin is pressed into the steel pipe.
And a tension member provided between the fixing rod and the core rod and the steel pipe.
Wherein a prestress is applied . Further, according to the invention of claim 2, the fixing head provided with the nut has both ends of the steel pipe.
At the end, a solidified body is inserted into the steel pipe, a resin is pressed into the steel pipe, and a prestress is applied to the steel pipe by a tension member provided between the fixing heads. The invention according to claim 3 is the invention according to claim 1 or 2.
The outer periphery of the core rod is covered with a coating.
You . According to a fourth aspect of the present invention, in any one of the first to third aspects, the core rod is screwed into the fixing head.
You . According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the tension member is a PC steel stranded wire, a PC steel wire, a PC steel rod,
It is characterized by being one of carbon steel wires . The invention of claim 6, in any one of claims 1 to 5, tension
At least one of the materials is fixed with a wedge or crimping grip.
Characterized in that it is joined to the According to a seventh aspect of the present invention, in the fifth aspect , one of the PC steel bars serves as a fixing head.
It is characterized by being screwed. The invention of claim 8
The joint structure between the column and the beam is such that the column and the beam
The connection according to any one of claims 1 to 7,
It is characterized by being joined by a fitting. Further, according to claim 9
Ming columns and beams can be joined using columns that are erected at appropriate intervals.
Claims: A beam is erected between the joining end of the beam and the column.
Insert the connector described in any of 1 to 7 and connect them.
It is characterized by combining.

[0006] The connection of a composite structure in which the column and the beam can be easily connected.
Fittings can be provided. Presto on core rod and steel pipe
The tension member is integrated by applying a less
Can be formed, and the columns and beams can be
A connector that can be easily joined can be provided. Steel pipe
Pre-stress is applied to
To effectively form a high tensile joint from the compression zone
That can be easily joined with the pillar and beam.
Fittings can be provided. Buckling performance of joints, fire resistance
Performance, fixing performance and rust prevention performance can be improved. resin
Is filled in the gap in the steel pipe,
The upholstery, the solidified body, and the fixing head are integrated. Inside steel pipe
Can prevent corrosion of tendons and core rods. Fixing
The core rod can be easily attached to the pad,
The length of the connector can be arbitrarily adjusted. Steel pipe and core
That prestress can be easily applied to the rod
Of the PC steel strand, PC steel wire, PC steel rod, carbon steel wire
The end can be easily fixed. Fixing the tension material to the fixing head
Easy to wear. Easy installation of steel bar on fixing head
And the length between the fixing heads can be changed arbitrarily.
Can be. The column and beam are hinged and these
Large earthquake can improve the rotational deformation capacity of the joint
The destruction of the joint at the time can be prevented. With columns and beams
Can be joined as easily as bolt joining
Therefore, the tension work of the tendon such as PC steel wire on the site
Can be omitted.

[0007]

[0008]

[0009]

[0010]

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

[0028]

[0029]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a joining tool, a joining structure and a joining method according to an embodiment of the present invention. FIG. 1A is a cross-sectional view of the connector according to the first embodiment, FIG. 1B is a cross-sectional view taken along line AA of FIG.
(3) is a sectional view taken along line BB of (1). In FIG. 1, reference numeral 1 denotes a connector, which includes fixing heads 3 and 4 having nuts 2a and 2b, a steel pipe 5, a core rod 6, and a tension member 7.

The fixing heads 3 and 4 are made of a stainless steel tube 5.
Are welded and joined to each other by core rods 6. Also, between the fixing heads 3 and 4, six PC strands 8 as tension members 7 are wired, thereby applying a pre-stress to the steel pipe 5 and the core rod 6 to thereby provide a high-tensile joining tool 1. And Nuts 2a and 2b are screwed onto the outer circumferences of the fixing heads 3 and 4, whereby the PC column and the PC beam can be tightened and joined.

The PC stranded wire 8 is formed by spirally winding a plurality of side wires 10 around an outer periphery of a core wire 9 at the center, and the entire outer periphery of the core wire 9 and the side wire 10 is made of a synthetic resin coating 11. , One end of which is fixed to one fixing head 3 by a pressure grip 15, and the other end of which is fixed to the other fixing head 4 by a wedge 16.

A solidified body 17 made of high-strength mortar is inserted into the steel pipe 5a, and is integrally joined with the fixing heads 3, 4 and the steel pipe 5 by a resin 18, and each hole 1 of the solidified body 17 is formed.
The PC steel strand 8 and the core rod 6 are inserted into 2 and 19, respectively. The resin 18 is provided in the resin column insertion holes 20 of the fixing heads 3 and 4.
And between the fixing heads 3 and 4 and the solidified body 17, between the solidified body 17 and the steel pipe 5, between the PC steel strand 8 and the hole 12, and between the core rod 6 and the hole 19. The gaps and other gaps are filled to integrate them. Note that the solidified body 17 can be formed of ceramic instead of the high-strength mortar.

Hereinafter, a method for assembling and forming the connector 1 will be described with reference to FIG. First, each member processed from each factory, that is, fixing heads 3 and 4 having nuts 2a and 2b, a stainless steel pipe 5, a core rod 6, and a coating 1
The PC steel strand 8 coated with 1 and the solidified body 17 made of high-strength mortar are carried into the site.

Next, one end of the core rod 6 is screwed into the fixing head 3 and one end of the stainless steel pipe 5 is welded. Next, the solidified body 17 is inserted into the steel pipe 5a by the hole 1
9 while inserting the core rod 6 into the core rod 6.
The other fixing head 4 is screwed into the other end of the steel pipe 5, and the other end of the steel pipe 5 is welded to the fixing head 4 by welding.

Next, while inserting the wire 8 PC strand having a crimp grip 15 in the holes 12 or al the other fixing head 4 of one of the fixing head 3 at one end, a line 8 from the PC steel predetermined The core rod 6 and the steel pipe 5 are prestressed by the force of the above and fixed by the wedge 16.

After tensioning the PC stranded wire 8 in this manner, when the resin 18 is pressed into the steel pipe 5a from the resin injection holes 20 of the fixing heads 3 and 4 at both ends, the resin 18 is pressed.
4 and the solidified body 17, between the solidified body 17 and the steel pipe 5, P
Between the C steel strand 8 and the hole 12, between the core rod 6 and the hole 19,
And other gaps to integrate them.
In this way, as shown in FIG. 1, the connector 1 in which the steel pipe 5 and the core rod 6 are given a predetermined prestress is assembled and formed.

FIG. 5 shows the tensile yield strength of the connector 1, from which it was confirmed that the connector 1 had high tensile strength.

FIG. 6 shows a connector 21 according to the second embodiment, except that both ends of the PC steel strand 8 are fixed to the fixing heads 3 and 4 by wedges 16. This is the same configuration as in FIG. Thus, both ends of the PC steel stranded wire 8 are wedge 1
Fixing at 6 makes it easy to fix the edges,
Since the wedges 16 face each other, loosening can be prevented.

FIG. 7 shows a connector 22 according to the third embodiment. The PC steel strand 8 of the connector 1 of FIG.
It has the same configuration as the connector 1 of FIG. With such a configuration, the core bar 6 and the PC steel bar 23
Thereby, high tension and toughness are increased, and flexural stress can be flexibly handled. (2) PC steel bar 23
Is fixed to the fixing heads 3 and 4 with screws instead of fixing the one end of the wedge 16, and there is an effect that the fixing can be easily performed.

FIG. 8 shows a connector 24 according to a fourth embodiment, in which the core rod 6 is thinned and the PC steel stranded wire 8 is
It has the same configuration as the connector 1 of FIG. With such a configuration, it is possible to achieve the same effect as the connector 1 of FIG. The PC steel bar 23 has one end fixed to the fixing head 4 by the wedge 16, but may be joined by screws (not shown) instead. Further, (3) uses the tendon 7 with the PC steel bar 23.
However, in this case, the same effect as described above can be obtained.

FIG. 9 shows a connector 25 according to a fifth embodiment, in which the core rod 6 is omitted, the PC stranded wire 8 is replaced by three large-diameter steel rods 26, and one end of which is fixed to the fixing head 4 It has the same configuration as the connector 1 of FIG. With such a configuration, the same effect as that of the connector 1 of FIG. 1 can be obtained.

FIG. 10 shows a connector 27 according to the sixth embodiment.
And the core rod 6 is omitted, and the PC steel stranded wire 8 is connected to the PC steel rod 23.
1 except that one end thereof is screwed to the fixing head 4. With such a configuration, high tensile strength and toughness are further increased, and it is possible to cope with shear stress of ten parts.

FIG. 11 shows a connector 39 according to the seventh embodiment.
1 except that the PC steel strand 8 is replaced by a PC steel rod 23 and both ends of the strand are joined to the fixing heads 3 and 4 by screws. Providing the screws 13 at both ends of the PC steel bar 23 has an effect that the connecting tool 1 can be easily assembled. In this manner, the tendon 7 is connected to the PC steel bar 23.
The configuration in which the screws 14 are provided at both ends can also be applied to the connectors 21, 22, 24, 25, and 27 shown in FIGS.

Next, a joint structure between a column and a beam using the above-described joining tool of FIG. 1 will be described with reference to FIGS. FIG. 12 shows a skeleton 30 of a prestressed structure assembled with PC columns 28 and PC beams 29, and the PC columns 28 and PC beams 29 are joined by the above-mentioned joint 1.

As shown in FIG. 13, a joint end 32 of the PC beam 29 is placed on a jaw 31 projecting from a place where the PC beam 29 is erected on the PC column 28. 28. This PC beam 29 is pre-stressed in advance by a primary cable 33, and one PC
Two joining tools 1 are inserted in two vertical stages from the joint groove 34a of the beam 29a to the joint groove 34b of the PC beam 29b opposed across the PC column 28, and nuts 2a, 2b are provided at both ends. Is tightened. A joint mortar 29c is filled between the ends of the PC beams 29a and 29b and the PC beam.

The shear force generated at the joint end 32 of the PC beam 29 is resisted by the jaw 31 of the PC column 28, and the upward shear resistance is regulated by the stopper 35 provided on the PC column 28. The stopper 35 is formed by binding a plurality of PC steel strands, and the end protruding from the side surface of the PC column 28 is in contact with the upper surface of the PC beam 29.

As described above, the joining end 32 of the PC beam 29 is
It is joined to the C column 28, and its upper and lower parts are the jaw 31 and the stopper 3
5, it is hinged to the PC column 28 and can rotate up, down, left, and right, but this rotation is suppressed by the connector 1.

Therefore, even if a large earthquake occurs and stress concentrates on this joint, the hinged PC beam 29 rotates to prevent the joint from breaking, but this rotation is kept within a predetermined range by the joint 1. Controlled.

Next, a method of joining the PC beam and the column will be described with reference to FIG. The joint 1 is, as described above,
Assembled and formed in the factory in advance shall be transported to the site.

Then, as shown in FIG.
A PC beam 29 is installed between them, and PC
If the beam 29 is Toritsui on and intersecting the PC post 28, nut 2a at both ends, the connectors 1 disconnecting the 2b, facing each other across the PC column 28 from the junction concave groove 34a of one of the PC beam 29a It is inserted through the joint groove 34b of the PC beam 29b, and is inserted from the PC beam 29 to the PC column 28 at the end of the frame 30.

Then, nuts 2 are attached to both ends of the joint 1 inserted into the joint of each PC column 28 and PC beam 29 in this manner.
These PC columns 28 and PC beams 29 are joined by screwing and tightening a and 2b. By repeating such operations sequentially, the frame 3 as shown in FIG.
0 can be easily assembled and constructed.

That is, since the PC column 28 and the PC beam 29 can be easily joined by the above-mentioned joining tool 1 in the same manner as the bolt joining, the conventional PC using the jack is used.
Tension work of the steel strand 8 can be omitted, and the construction period can be significantly reduced. Therefore, since such complicated work at the site is eliminated, the assembly and construction of a particularly high-rise building can be easily performed.

[0053]

According to the present invention, a prestress is applied to a core rod and a steel pipe so that a high-strength joint can be formed, and a joint that can easily join a PC column and a PC beam can be provided. it can.

By applying a prestress to the core rod and the steel pipe with a tendon material, it is possible to provide a connector having a uniform yield elongation.

By applying a prestress to the core rod and the steel pipe with a tendon material, it is possible to apply a compressive deformation to them in advance.

By applying a prestress to the steel pipe, it is possible to form a high-strength connector,
It is possible to provide a connector that can easily join the column and the PC beam.

Buckling performance, fire resistance, fixing performance,
Rust prevention performance can be improved.

The resin is filled in the gap in the steel pipe, and the steel pipe and the solidified body or the solidified body and the fixing head are integrated.

[0059] Corrosion of the core rod can be prevented.

The core rod can be easily attached to the fixing head, and the length of the connector can be arbitrarily adjusted.

Prestress can be easily applied to the steel pipe and the core rod, and the end of the steel wire or the steel rod can be easily fixed.

The tension material can be easily fixed to the fixing head.

The steel bar can be easily attached to the fixing heads, and the length between the fixing heads can be arbitrarily changed.

Since the column and the beam are hinged and the rotational deformation capability of these joints can be increased, the joints can be prevented from being damaged during a large earthquake.

Since the column and the beam can be easily joined in the same manner as the bolt connection, the work of tensioning a tension member such as a PC steel wire at the site can be omitted, and the construction period can be significantly shortened. become able to. In addition, since complicated work on site is eliminated, assembly of a particularly high-rise building can be easily performed.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view of a connector according to a first embodiment,
(2) is a sectional view taken along the line AA of (1), and (3) is a sectional view of B of (1).
FIG. 4 is a cross-sectional view taken along line B.

FIG. 2 is a sectional view of a PC steel strand.

3 (1) is a front view of the connector of FIG. 1, and (2) and (3) are side views of (1).

FIGS. 4 (1) and (2) are sectional views showing an assembled state of the connector of FIG. 1;

FIG. 5 is a line graph showing the tensile yield strength of the joint of FIG. 1;

FIG. 6A is a cross-sectional view of the connector according to the second embodiment,
(2) is a sectional view taken along line CC of (1).

FIG. 7A is a cross-sectional view of the connector according to the third embodiment,
(2) is the same sectional view.

FIG. 8 (1) is a sectional view of a connector according to a fourth embodiment,
(2) is a sectional view taken along line DD of (1), and (3) is a sectional view of the same.

FIG. 9 (1) is a sectional view of a connector according to a fifth embodiment,
(2) is a sectional view taken along line EE of (1).

FIG. 10A is a cross-sectional view of the connector according to the sixth embodiment, and FIG. 10B is a cross-sectional view taken along line FF of FIG.

FIG. 11 (1) is a sectional view of a connector according to a seventh embodiment.

FIG. 12 is a front view of a skeleton having a structure using a connector.

FIG. 13 is a perspective view of a joint between a column and a beam, and FIG.
FIG.

FIG. 14 is a front view of a frame having a conventional structure.

[Explanation of symbols]

 1, 21, 22, 24, 25, 27, 39 Connector 2a, 2b Nut 3, 4 Fixing head 5 Steel pipe 6 Core rod 7 Tension member 8 PC stranded wire 9 Core wire 10 Side wire 11 Coating 12 Hole 13 Screw 15 Crimping grip Reference Signs List 16 wedge 17 solidified body 18 resin 19 hole 20 resin injection hole 23 PC steel rod 26 steel rod 28, 36 PC column 29, 37 PC beam 30 skeleton 31 jaw 32 joint end 33 primary cable 34a, 34b joint groove 35 Stopper 38 PC steel wire

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-62-137364 (JP, A) JP-A-11-141130 (JP, A) JP-A-11-131587 (JP, A) JP-A-7-137 189149 (JP, A) JP-A-11-100944 (JP, A) JP-A-6-158716 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04B 1/21-1 / 22 E04C 5/00-5/20 E04G 21/12 104

Claims (9)

(57) [Claims] A pair of fixing heads having a nut are joined by a core rod and a steel pipe, a solidified body is inserted into the steel pipe, and a resin is pressed into the steel pipe.
Prestress is applied to the tensioning material between the fixing heads
A connector characterized by being made . 2. A fixing head provided with a nut is provided at both ends of a steel pipe.
The solidified body is inserted into the steel pipe,
A connector, wherein a resin is press-fitted into a steel pipe, and a prestress is applied to the steel pipe by a tension member provided between fixing heads. 3. An outer periphery of a core rod is covered with a coating.
The connector according to claim 1 or 2 , wherein The core rod is screwed into the fixing head.
The connector according to claim 1, wherein: 5. The tension member is made of PC steel strand, PC steel wire, PC
The connector according to any one of claims 1 to 4, wherein the connector is any one of a steel rod and a carbon steel wire . 6. The tendon is at least one of a wedge and a crimp.
The joining device according to any one of claims 1 to 5, wherein the joining device is joined to the fixing head by a grip . 7. One of the steel bars is screwed into the fixing head.
The connector according to claim 5 , wherein the connector is provided. 8. The column and the beam extend from the joint end of the beam to the column.
A joint structure between a column and a beam, wherein the joint structure is joined with the joint device according to claim 1 . 9. A beam is provided between columns erected at appropriate intervals.
8. The method according to claim 1, wherein the beam is provided from the joint end of the beam to the column.
A method for joining a column and a beam, comprising inserting the joining tool described in any of the above and joining them.