JPH06185111A - Precast concrete beam and column and construction method of earthquake-proof wall using them - Google Patents

Abstract

PURPOSE:To construct an earth quake-proof wall using a precast concrete member in a short time and easily. CONSTITUTION:A large number of precast concrete columns 8 are raised with connection reinforcements 15 provided along the axial direction on the side face and an integrally formed cogging for receiving beam 9, and a precast concrete beam 1 is erected by making its end supported by the cogging for receiving beam 8. The beam 1 is provided with a clearance part 3 vertically piercing along the axial direction, and the end of a longitudinal reinforcement 16a is inserted into this clearance part 3. Also, wall reinforcements 16 are arranged on the ends of lateral reinforcements 16b while overlapping and joining with the connection reinforcements 15, and a wall form 17 is assembled and formed on the outsides of the wall reinforcements 16. And concrete 18 is placed in the form 17 through the clearance parts 3 of the beam 1 so as to integrally construct the beam 1, the column 8 and a wall 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast concrete beam and a column, and a method for constructing an earthquake-resistant wall using them.

[0002]

2. Description of the Related Art Conventionally, the construction of an earthquake-resistant wall using precast concrete members such as precast concrete beams and precast concrete columns has been done by installing precast concrete beams between precast concrete columns and then arranging wall reinforcement between these columns. It was constructed by assembling and forming the formwork by making a streak and then pouring concrete into the formwork.

[0003]

However, in the construction method as described above, it is necessary to perform each step such as rebar arrangement, formwork assembly, concrete pouring, and curing separately. Has the drawback that it takes time and labor and the work efficiency is poor, and the construction period is long. Further, since it is difficult to place concrete, the integrity of the wall and the beam has been a problem. The present invention has been made in view of the above problems, and an object thereof is to easily construct an earthquake-resistant wall using a precast concrete member in a short period of time and to integrally construct a pillar, a wall and a beam. And to provide a precast concrete beam and a precast concrete column that can easily construct a seismic wall in a short period of time.

[0004]

Means for Solving the Problems The gist of a precast concrete beam of the present invention for achieving the above object is that precast concrete members which are divided in the axial direction are joined to each other with a predetermined gap, and The precast concrete members are separable, and the precast concrete beams are provided with voids that penetrate vertically in the axial direction. The connecting bar mounting metal fittings are embedded along the direction, and the construction method of the earthquake-resistant wall further erected many precast concrete columns with connecting bars protruding along the axial direction of the side surface, The precast concrete beam is erected by supporting the end part of the beam receiving jaw of the precast concrete column. Is provided with a void portion that penetrates vertically along the axial direction, the longitudinal end portion is inserted into the void portion, and the lateral end portion is lap jointed with the connecting muscle of the column to arrange the wall muscle, A wall form is assembled and formed on the outside of the wall reinforcement, and concrete is poured from the void portion of the beam into the form to integrally form a pillar, a beam, and a wall. The connecting bar of the column is detachable, and the beam is axially separable.

[0005]

By constructing an earthquake-resistant wall using the precast concrete columns having the connecting bars protruding from the side and the precast concrete beams having the voids as described above, the longitudinal reinforcement end of the wall reinforcement is obtained. Since the portion is inserted into the void of the beam and the end of the lateral reinforcement is lap jointed with the connecting bar of the column to integrally construct the column, the beam and the wall, it is possible to easily construct the earthquake resistant wall in a short period of time. .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a plan view of a precast concrete beam 1 (hereinafter simply referred to as a beam) of the present invention, which is constructed by joining precast concrete members 2 divided along an axial direction with a predetermined gap 3 to face each other. There is.

In this connection, the projections 2a provided at four positions on the facing surface of the precast concrete member 2 are butted against each other,
The protrusions 2a are joined together by bolts 2b penetrating the protrusions 2a. Therefore, these precast concrete members 2 can be freely divided, and can be installed between columns in either a joined state or a divided state. Furthermore, by changing the protruding length of the protrusion 2a, the gap 3 and the beam 1 can be made to have arbitrary widths.

Shear cotters 4 as shown in FIG. 4 are recessed in two rows on opposite sides of the void 3, and reinforcing bars 5 projecting above and below the reinforcing bars 5 face each other.
And are arranged alternately.

Further, at both joint ends 1a of the beam 1, a step 6 for mounting on a beam receiving jaw of a column is formed, and a PC steel wire insertion hole 7 is penetrated from this step 6 to the upper surface of the beam. An upper part of the stirrup bar 1b is projected on the upper surface of the beam.

FIG. 8 shows another embodiment of the beam 1 in which fitting grooves 1c for mounting a channel-shaped PC floor board are formed on both sides of the upper surface of the beam.

Further, (1) and (2) of FIG. 9 show a precast concrete beam 1 of the second invention, which is provided with a void portion 3 which vertically penetrates along the axial direction. Similar to the above, the shear cotter 4 is recessed on the facing surface of the void portion 3 and the reinforcing bar 5 is projectingly provided so as to be alternately stacked.

In addition, the stepped portion 6 of the joining end portion 1a, the PC
The steel wire insertion hole 7, the stirrup bar 1b and the fitting groove 1c are the first
It has the same structure as the beam 1 in the invention.

FIG. 10 is a sectional view showing a precast concrete column 8 (hereinafter simply referred to as column) of the present invention. The column 8 has a beam receiving jaw 9 protruding from the head in advance, and a PC steel wire insertion hole 10 for prestressing is penetrated in the axial direction. The pair of recessed grooves 8a provided on the side surface of the column 8 along the entire axial length is provided with the connecting bar attachment metal fitting 1
1 is attached.

In this connecting bar attachment metal fitting 11, the end of a cap nut 11a screwed to a column rebar 8b is penetrated by a joint plate 11b, and a protective seal 12 is attached to the surface of the joint plate 11b. Then, as shown in FIG. 11, the protective seal 12 is peeled off and the connecting bar 15 is connected to the cap nut 11a. The connecting bar attachment metal fitting 11 is not limited to one surface of the side surface of the pillar, but may be provided on each side surface, and is properly used according to the use place of the pillar 8.

Next, a construction method of a seismic resistant wall using these beams 1 and columns 8 will be described with reference to FIGS. First, as shown in (1) and (2) of FIG.
A large number of pillars 8 are erected on a pedestal block 14 of foundation concrete 13, and the pedestal block 14 and the pillars 8 are connected to the PC steel rod 1
The PC steel wire 10a inserted into the PC steel wire insertion hole 10 is tensioned and prestressed while being connected by 4a, thereby forming an integral structure with the pillar 8, the pedestal block 14, and the foundation concrete 13.

Next, the beam 1 is erected so that the beam receiving jaws 9 of these columns 8 support the step 6 of the joint end 1a. This beam 1 is formed by bolting a precast concrete member 2 on site. Then, the beam 1 is joined to the pillar 8 by tension fixing with the PC steel wire 7a inserted over the PC steel wire insertion holes 7 and 10 of the beam 1 and the pillar 2.

Next, as shown in (1) of FIG. 13, the protective seal 12 is peeled off and the connecting bar 15 is connected to the connecting bar mounting member 11.
And the wall muscles 16 are arranged between the columns 8. The upper portion of the vertical line 16a of the wall line 16 is inserted into the void 3 of the beam 1 and cross-arranged with the reinforcing line 5. On the other hand, the horizontal line 16
Both end portions of b are overlaid with the connecting ribs 15 of the columns 8 on both sides.

Next, as shown in (2) of the same figure, a wall form 17 is assembled and formed outside the wall reinforcement 16, and concrete 18 is poured into the form 17 from the void 3 of the beam 1. By installing, the earthquake resistant wall 20 in which the beam 1, the pillar 8 and the wall 19 are integrally constructed is constructed. Then, as shown in FIG. 14, after the earthquake-resistant wall 20 is constructed, the PC floorboard 21 is placed on the beam upper surface and the top concrete 22 is placed thereon to construct the composite floor slab 23.

In this embodiment, the beam 1 is the precast concrete member 2 joined by bolts. However, the beam is not limited to this, and naturally the beam of the second invention of the present invention can also be used.

[0020]

EFFECTS OF THE INVENTION Precast concrete members divided in the axial direction are joined to each other with a predetermined gap,
In addition, since these precast concrete members are separable, they can be easily transported, and the width of the beam can be arbitrarily changed by changing the size of the void.

Since the precast concrete beam is provided with a void portion that penetrates vertically along the axial direction, the vertical ribs of the wall reinforcement can be inserted into the void portion, so that the joint with the wall is easy and strong. Can be

By embedding the connecting bar attachment metal fitting along the axial direction of the side surface of the column, the connecting bar to the wall can be easily attached and the joint of the wall door can be strengthened.

A large number of precast concrete columns with connecting bars protruding along the axial direction of the side surface are erected, and the precast concrete beams are erected by supporting the ends of beam receiving jaws integrally formed with the columns. , The beam is provided with a void that penetrates vertically along the axial direction, and the longitudinal end of the vertical line is inserted into the void, and the end of the horizontal line is overlapped with the connecting line of the column and the wall line is arranged. A wall formwork is assembled and formed on the outside of the wall reinforcement, concrete is poured from the void portion of the beam into the formwork, and the pillar, the beam, and the wall are integrally constructed, so that the earthquake-resistant wall Can be easily constructed in a short period of time.

[Brief description of drawings]

FIG. 1 is a plan view of a precast concrete beam.

FIG. 2 is a bottom view of FIG.

FIG. 3 is a front view of FIG.

FIG. 4 is a sectional view taken along line aa of FIG.

5 is a side view of FIG. 1. FIG.

6 is a cross-sectional view taken along the line bb of FIG.

7 is a cross-sectional view taken along the line cc of FIG.

FIG. 8 is a plan view of another embodiment of the first invention.

9A is a plan view of the second invention, and FIG. 9B is a sectional view taken along line dd of FIG.

FIG. 10 is a cross-sectional view of a precast concrete column.

FIG. 11 is a cross-sectional view of a precast concrete column to which connecting bars are connected.

12 (1) and (2) are cross-sectional views in which a precast concrete beam is bridged between precast concrete columns.

13 (1) and (2) are cross-sectional views in which wall reinforcement is arranged between precast concrete columns.

FIG. 14 is a sectional view of the earthquake-resistant wall.

[Explanation of symbols]

 1 Precast Concrete Beams 1a Joint Ends 2 Precast Concrete Members 2a Projections 2b Bolts 3 Voids 4 Shear Cotta 5 Reinforcing Bars 6 Steps 7, 10 PC Steel Wire Insert Holes 8 Precast Concrete Pillars 9 Beam Receiving Jaws 11 Connecting Bar Mounting Brackets 12 Protective seal 13 Foundation concrete 14 Pedestal block 15 Connecting bar 16 Wall bar

Claims (6)

[Claims] 1. A precast concrete member which is divided in an axial direction is joined in a facing manner with a predetermined void portion,
Moreover, the precast concrete beam is characterized in that these precast concrete members are separable. 2. A precast concrete beam having a void portion that penetrates vertically along the axial direction. 3. A precast concrete column, characterized in that a connecting bar fitting is embedded along the side surface of the column along the axial direction. 4. A large number of precast concrete columns having connecting bars projecting along the axial direction of the side surface are erected, and the beam receiving jaws of the columns are supported at their ends to erect the precast concrete beams. The beam is provided with a void that penetrates vertically along the axial direction, and the longitudinal end of the vertical line is inserted into the void, and the end of the horizontal line is overlapped with the connecting bar of the column to arrange the wall bar. ,
Precast concrete characterized in that a wall formwork is assembled and formed on the outside of the wall reinforcement, and concrete is cast from the void portion of the beam in the formwork to integrally form columns, beams and walls. Beams and columns, and construction methods for earthquake-resistant walls using these. 5. The method for constructing an earthquake-resistant wall according to claim 4, wherein the connecting bar of the pillar is detachable. 6. The method for constructing an earthquake-resistant wall according to claim 4, wherein the beam is dividable in the axial direction.