JP2582870Y2 - Structure of the connection between girder and girder - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a connecting portion between a girder such as reinforced concrete and a small beam of half precast concrete.

[0002]

2. Description of the Related Art Japanese Unexamined Utility Model Publication No. 3-120701 discloses a structure of a connecting portion between a girder and a girder. As shown in FIGS. 8 and 9, the structure of the connecting portion between the girder and the girder described in the above-mentioned publication is such that the girder-side connecting plate 15 attached to and embedded in the steel frame 60 of the girder 1 made of steel reinforced concrete is It is provided so as to protrude outward from the side surface 2.

A connection end face 24 of a half precast concrete beam 23 is provided on the connection face 3 of the beam 1.
Are installed facing each other at intervals, and the beams 23 are installed.
The tip 36 of the beam-side connection plate 35 embedded in the connection part 3
Is connected to the end 16 of the girder-side connection plate 15 with a bolt 37.

The connecting surface 3 of the beam 1 and the beam 23
Is formed so that cast-in-place concrete 44 can be cast between the end faces 24 of the joints.

[0005]

The structure of the connection between the conventional girder 1 and the girder 23 is such that a half precast concrete girder is attached to an end 16 of a girder side connection plate 15 embedded in the girder 1 made of steel reinforced concrete. By connecting the end portions 16 of the beam-side connection plates 15 embedded in the beam 23, the beam 23 of half precast concrete is easily connected to the beam 1 of concrete, and the connection surface 3 of the beam 1 and the beam 23 It is formed so that cast-in-place concrete 44 can be cast between the connection end surfaces 24, and is excellent.

However, the structure of the connecting portion between the girder 1 and the girder 23 is only to connect the tip end 36 of the girder-side connecting plate 35 to the end 16 of the girder-side connecting plate 15. Is easy, but the strength of the connecting portion is not sufficient.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a structure in which a connecting portion between a concrete girder and a half precast concrete girder can be connected easily and firmly. Technical issues.

[0008]

SUMMARY OF THE INVENTION The present invention provides a girder-side connecting plate 1 in which a stud 18 is attached to a concrete girder 1.
5 is buried with its plate surface oriented in the horizontal direction and its end 16 projected outward from the side surface 2 of the girder 1,
The connection surface 3 of the girder 1 is formed so as to be depressed from the side surface 2, and the connection surface 3 of the girder 1 and the connection end surface 24 of the small beam 23 made of half precast concrete are opposed to each other with a space between them. The beam 23 is installed, and the tip 36 of the beam-side connection plate 35 with the stud 18 buried in the connection part of the beam 23 projects from the connection end face 24. 15 and the bent portion 30 at the tip of the beam reinforcement 29 provided on the beam 23 is connected to the connection surface 3 of the beam 1.
Then, between the connection surface 3 of the girder 1 and the connection end surface 24 of the girder 23, a cast-in-place concrete 44 was formed so as to be able to be cast, thereby forming a structure for connecting the girder and the girder.

[0009]

The structure of the connecting part of the girder and the girder of the present invention is such that the half precast concrete is attached to the end 16 of the girder side connecting plate 15 with studs 18 protruding outward from the side face 2 of the concrete girder 1. The tip 36 of the beam-side connection plate 35 with the stud 18 protruding from the connection end face 24 of the beam 23 is connected.

At the same time as the above connection, the bent portion 30 at the tip of the small beam reinforcing bar 29 provided on the small beam 23 is inserted into the recess of the connection surface 3 of the girder 1 to make the connection surface 3 and the connection end surface. Since the cast-in-place concrete 44 can be cast between the 24, the girder 1 and the girder 23 are connected very firmly.

Further, the end portion 16 of the girder side connecting plate 15
And a portion for connecting the distal end portion 36 of the small beam side connecting plate 35 and a portion for inserting the bent portion 30 at the distal end of the small beam rebar 29,
Since it is outside the connection surface 3 of the girder 1, the end 16 of the connection member 15 on the side of the girder and the tip 36 of the connection plate 35 on the side of the girder are connected to each other, and Small beam rebar 29
Insertion of the bent portion 30 is also easy.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, and FIG. 2 is a view showing the same embodiment as the above embodiment, in which a part of the girders 8 is omitted.

The reinforced concrete girder 1 of this embodiment
Are four upper girders 8 and four lower girders 8
Are surrounded by a stap wrap 10. The girder 1 is
The concrete 4 is cast in the lower part, except for the part where the upper girders 8 are provided.

At the center of the girder 1 near the upper part, a girder-side connecting plate 15 made of a steel plate has its plate surface oriented in the horizontal direction, and its left and right ends 16 are connected to the left and right side surfaces of the girder 1. It is buried so as to protrude outward from 2.

The girder-side connecting plate 15 is provided with six holes, into which studs 18 each having a head are inserted and welded. The connecting bolts 3
7 is provided, and a girder-side attachment plate 17 made of a steel plate is welded to the lower end of the girder-side connection plate 15.

Further, the connecting surface 3 from which the end 16 of the girder-side connecting plate 15 of the girder 1 projects is formed so as to be recessed from the side surface 2 of the girder 1. And the connection surface 3 of the girders 1
And the connecting end face 24 of the small beam 23 made of half precast concrete, facing each other at an interval, the small beam 23 is installed, and the small beam side connecting plate made of steel plate embedded in the connecting portion of the small beam 23 The tip 36 of the 35 is connected to the end 16 of the girder-side connecting plate 15 by a bolt 37. The tip 36 projects from the end face 24 of the connection.

The stud 18 with a head is also provided on the small beam side connecting plate 35 in the same manner as the large beam side connecting plate 15.
And a small beam side attachment plate 38 is attached. Then, the tip of the lower beam rebar 29 provided in the beam 23 is bent at approximately 90 degrees to form a bent portion 30, and the bent portion 30 is formed in a recess of the connection surface 3 of the beam 1. Pile-in-place concrete 44 is inserted between the connection surface 3 of the girder 1 and the connection end surface 24 of the small beam 23.
This is the structure of the connecting part of the girder and the girder, which forms a space for casting.

Further, the large beam 1 and the small beam 23 are beams for forming a circular dome, and as shown in FIG.
Are connected to the girder 1 at an angle so as to form an arc.

As described above, at the connecting portion where the girder 1 is connected to the girder 23, the reinforcing bar 43 is disposed above the girder 1 and the girder 23, and the connection surface 3 of the girder 1 and the girder 23 are connected. Connection end face 24
Cast-in-place concrete 44 is cast in the gaps and on the upper surfaces of the girder 1 and the girder 23 to form the connected girder 1 and girder 23.

The girders may be steel girders. In addition, the girder can be made of half precast concrete.

FIGS. 3 to 5 show an embodiment of a connecting portion between a pillar of a circular dome and a girder. The embodiment of the connecting portion between the pillar and the girder is shown in FIG.
The column rebar 50 is erected.

The large girders 1a and 1b intersecting the column 49 at right angles have three large girders 8a and 8b extending forward from the lower part of the connection end face 24, respectively.
-The bent portion 3 is bent upward near the end surface 24 of 1a.
0 is formed.

And, each of the three girders 8a
8b, the girders 8a and 8b at the center are provided to be offset to the opposite sides, respectively.
The tip of 8b is inclined in the opposite direction, and is formed so that the girder reinforcing bars 8a and 8b are inserted into the portion to be the column 49 without contact.

The small girders 1c and 1d, which intersect the large girders 1a and 1b at a substantially right angle, are also formed by girders 8c and 8d.
Is formed substantially in the same manner as the girders 8a and 8b, but the girders 1c and 1d are formed so as to have an arc shape.
One end of the connection end face 24 is formed so as to be pushed into the column 49 so as to be installed at an angle with respect to.

The girders 8a, 8b, 8c.
The inclination angle of 8d is as shown in FIG. Reinforcing bars 43 are disposed above the girders 1a and 1b and girders 1c and 1d formed as described above, and cast-in-place concrete 44 is provided on the portions to be the columns 49 and on the upper surfaces of the girders 1a, 1b, 1c, and 1d. Pillar 49 and girder 1a, 1b.
1c and 1d are formed.

FIGS. 6 and 7 show an embodiment of a connecting portion in which a small beam is connected to a large beam with a vertical level difference. In the embodiment of the connecting portion having this level difference, the upper half portion serving as the connection portion of the reinforced concrete girder 1 is a portion where no concrete is cast, and a side end portion of the portion where the concrete is not cast. Then, the end of the beam 23 of the half precast concrete is inserted, and the beam reinforcing bar 29 below the beam 23 is bent upward at the connection portion of the beam 1 to form a bent portion 30 to form a connecting portion. Is formed.

Then, the bent portion 30 formed at the tip of the reinforcing bar 43 installed above the small beam 23 is inserted into the connection portion of the large beam 1, and the bent portion 30 of the large beam 1 and the small beam are connected to the small beam. The cast-in-place concrete 44 is cast on the upper surface of the beam 23 to form the connected large beam 1 and small beam 23.

[0028]

[Effect of the invention] The structure of the connecting part of the girder and the girder of the invention is as follows.
At the end 16 of the girder-side connecting plate 15 with studs 18 protruding outward from the side surface 2 of the concrete girder 1, a connection end surface 24 of a half precast concrete girder 23 is attached.
The distal end portion 36 of the small beam side connection plate 35 with the protruding stud 18 is connected.

Then, the bent portion 30 at the tip of the beam rebar 29 of the beam 23 is inserted into the recess of the connection surface 3 of the girder 1, and the cast-in-place concrete is inserted between the connection surface 3 and the connection end surface 24. 44 are formed.

Therefore, the present invention provides a girder 1 and a girder 23.
Are very strongly connected. Further, a portion for connecting the end portion 16 of the girder-side connection plate 15 to the tip end portion 36 of the girder-side connection plate 35 and a portion for inserting the bent portion 30 of the girder rebar 29 are outside the connection surface 3. It is.

Therefore, the connection between the end portion 16 and the tip portion 36 and the insertion of the bent portion 30 of the beam girder 29 into the recess of the connection surface 3 are easy, and the connection between the girder 1 and the girder 23 is easy. Can be.

[Brief description of the drawings]

FIG. 1 is a front sectional view schematically showing a connecting portion between a girder and a girder according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of the connecting portion between the girder and the girder according to the embodiment of the present invention, as viewed from above.

FIG. 3 is a plan view of a connecting portion between a pillar and a girder of a circular dome.

FIG. 4 is a front view of a connecting portion between a pillar and a girder of a circular dome.

FIG. 5 is a diagram showing the inclination of a girder reinforcing bar at a connection portion between a column and a girder of a circular dome.

FIG. 6 is a cross-sectional view of a connecting portion having a level difference between a large beam and a small beam as viewed from the front.

FIG. 7 is a plan view of a connecting portion having a level difference between a large beam and a small beam.

FIG. 8 is a front view of a conventional example.

FIG. 9 is a perspective view of a conventional small beam.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Girder 2 Side surface 3 Connection surface 15 Girder side connection plate 16 End 18 Stud 23 Small beam 24 Connection end surface 29 Small beam rebar 30 Bend 35 Small beam side connection plate 36 Tip 44 Cast-in-place concrete

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04B 1/16

Claims (1)

(57) [Scope of request for utility model registration] A stud 18 is provided on a concrete girder 1.
The girder-side connecting plate 15 to which the girder 1 is attached is buried with its plate surface oriented in the horizontal direction, and its end 16 is projected outward from the side surface 2 of the girder 1. The beam 3 is formed so as to be recessed from the side surface 2, and the beam face 3 of the girder 1 and the port end face 24 of the beam 23 made of half-precast concrete face each other with a space therebetween.
The tip end portion 36 of the small beam side connection plate 35 with the stud 18 embedded in the connection portion of No. 3 is made to protrude from the connection end surface 24,
This tip 36 is connected to the end 16 of the girder side connection plate 15, and the bent portion 30 at the tip of the girder reinforcing bar 29 provided on the girder 23 is inserted into the recess of the connection surface 3 of the girder 1. A structure of a connecting portion between a girder and a small beam formed so that cast-in-place concrete 44 can be cast between the connection surface 3 of the girder 1 and the connection end surface 24 of the small beam 23.