JPS6351215B2 - - Google Patents

Description

[Detailed Description of the Invention] The prefabricated construction method, in which reinforced concrete members such as columns and beams manufactured in a factory are assembled on-site to create an earthquake-resistant and fire-resistant building, has many advantages such as shortening the construction period and reducing construction costs. It plays a major role in the modernization of architectural production.

One of the advantages of the prefabricated construction method using reinforced concrete members is that it is possible to reduce the weight of the building by using lightweight members with reasonable cross-sectional shapes, such as columns and floorboards with hollow sections. By reducing dead weight and reducing seismic forces acting on buildings, new reinforced concrete structures can be developed.

On the other hand, a major drawback of prefabricated construction methods using reinforced concrete members is that it is difficult to join the members. In particular, in the case of rigid joints, members cannot be easily joined like welding or high-strength bolt joints in steel materials. The method of rigidly bonding components by directly crimping them using prestressed steel rods is the preferred construction method both mechanically and in terms of taking advantage of the advantages of prefabricated construction methods, but since it is difficult to absorb construction errors, this method cannot be adopted. Joints are limited. For this reason, when making a rigid joint, generally the construction method is to post-concrete the joint. Although this concrete post-casting method is convenient for absorbing construction errors,
Since the specified strength cannot be expected at the joint until the post-cast concrete has hardened, the biggest advantages of prefabricated construction methods are shortened construction times and reduced construction costs.
It cannot be said that it is a desirable joining method for promoting.

Currently, when building reinforced concrete buildings without shear walls using the prefabricated construction method, the framework of a conventional rigid-frame structure consisting of columns and beams is divided into sections, fabricated at a factory, and assembled on-site. is commonly practiced. However, in the case of this construction method, the structure itself is almost the same as a conventional rigid-frame structure, and there is nothing to be noted for reducing the weight of the members.Additionally, it is necessary to post-concrete to rigidly connect the frame, and the prefabricated construction method The reality is that the benefits of this are not being fully utilized.

If the prefabricated construction method were to follow the rigid frame structure of columns and beams, it would be like trying to fight against the shackles of rigid joints and throwing away the weapon of lightweighting of parts, and the disadvantages are obvious. In order to develop prefabricated construction methods, it is necessary to develop a new structure to replace the conventional rigid frame structure.

The present invention is a new structure of a prefabricated reinforced concrete structure whose main purpose is to simplify joints and reduce the weight of members, and has the following features.

When a horizontal seismic force acts on a conventional rigid-frame structure building, a large bending moment is generated in the columns and beams, but almost no bending moment is generated in the floor plate due to the seismic force. In other words, the floorboards do not resist the horizontal force that causes interstory displacement in the building. It is unreasonable that floorboards, which make up a significant portion of a building, do not work effectively against earthquake forces, so in the present invention, instead of the conventional beams and floorboards, highly rigid floorboards are used, We decided to distribute the bending moment caused by seismic force widely across the floorboards.

As shown in FIGS. 1 to 3, the building of the present invention has a structure formed by floor plates having so-called random joint surfaces in which the bond surfaces are shifted, and columns rigidly joined to the floor plates. In the case of prefabricated floor plates where the joint surfaces are in a straight line as shown in Figure 5, if the joints are not made rigid, the structure will deform under the force as shown in Figure 6 and will not be able to resist horizontal seismic force. Can not. On the contrary,
If the joint surfaces of the floor plates are made with random joints as in the present invention, the structure will be similar to the frame shown in Figure 4, and even if the joints are pin joints, for example, the structure will resist horizontal seismic force. can do. Therefore, in the case of the present invention, the joints of the floorboards need only be simple joints that transmit shear force and axial force.

In addition, in the case of the non-slip plate structure of the present invention, in order to rigidly connect the column and the floor plate, a joining method can be used in which the floor plate is crimped to the column using the tensile force of a PC steel rod, etc., so the shape of the column is It has the feature that columns and floorboards can be easily rigidly connected regardless of the
It is possible to use a cylindrical column that is lightweight and has a high compressive strength.

A major feature of the present invention is that the weight of the building is reduced by using cylindrical columns for the pillars and hollow floor plates reinforced with steel for the floor plates. For traditional reinforced concrete rigid frame structure, the economic span is 6m ~
However, in the case of the present invention, the economical span can be reduced to 10m by using lightweight and highly rigid floor plates.
It is possible to extend it to about 12m. Therefore, in addition to reducing the dead weight of the members, the required number of columns can be reduced, and the dead weight of the entire building can be significantly reduced.

In addition to the above, the building of the present invention has the following advantages over conventional prefabricated rigid frame structures. (1) The thickness of the floor plate can be made considerably smaller than that of conventional beams, and the dead space of the building can be reduced. (2) Equipment piping such as ducts can be installed in the hollow part of the floorboard. (3) The upper floor plate that forms the lid of the hollow floor plate can be removed and work such as joining the floor plates and installing equipment piping can be carried out safely from above. (4) All parts are constructed in a shape that is convenient for accumulation and transportation. (5) The bottom surface of the hollow floor plate forms a complete fireproof ceiling.

Next, embodiments of the present invention will be described.

As shown in Figure 9, a floor plate with pillars 3
is placed, tensile force is applied to the PC steel rod 4 arranged inside the cylindrical column 2, and the cylindrical column 2 is used as the foundation 1, and the floor plate with column 3 is placed.
are respectively crimped and joined to the cylindrical column 2. Cylindrical column 2
The lower end is fitted into the protruding portion 5 of the foundation 1, and the lower end surface is installed in close contact with the upper surface of the foundation 1 via the adjustment plate 6. The floor plate 3 with pillars has the convex portion 5' connected to the cylindrical pillar 2.
and placed in close contact with the upper end surface of the cylindrical column 2 via the adjustment plate 6.

As shown in FIGS. 7 to 10, the pillared floorboard 3 includes a box-shaped main body 8 with a square plane on which a pillar support 7 is provided on the bottom plate, and an upper floor board 9 that forms a lid of the box-shaped main body 8. A reinforced concrete outer shell consisting of;
It is formed by diagonal steel rods 10 and compressed diagonal members 11 made of reinforced concrete, which are arranged radially from the top of the column support 7 toward the end of the bottom plate of the box-shaped main body 8. The upper floor plate 9 is attached to a box-shaped main body 8 by anchor bolts.
It is removably attached to the side plate and column support stand 7 of. The diagonal steel rod 10 has an upper end connected to a steel ring fixed to the upper part of the column support 7, and a lower end passed through the bottom plate edge of the box-shaped main body 8. Tighten the nut of the threaded part at the lower end to apply tensile force. It is installed with the system installed. The compression diagonal member 11 has an upper end connected to the steel ring on the upper part of the column support 7, and a lower end connected to the box-shaped main body 8.
The box-shaped main body 8 is disposed diagonally in close contact with the lower side plate of the box-shaped main body 8.

Although FIGS. 7 to 10 are examples of a floor plate with pillars 3 having a square plane, a floor plate with columns 3' having a rectangular plane may also be used.
It is formed almost in the same way as for a square plane.

The lower end of the PC steel bar 4 is fixed to the foundation 1, and the upper end is made to protrude above the convex portion 5 of the columnar floor plate 3. The PC steel bar 4 is installed by tightening the nut of the threaded portion at the upper end and applying tensile force. .

As shown in Fig. 1, between each pillared floor plate 3, 3',
The column strip floorboards 12, 12' are spread like beams, and the column strip floorboards 12, 12' and the column floor plates 3, 3' are formed.
The column strip floor plates 12, 12' are joined together with bolts.

As shown in FIGS. 11 to 15, the column strip floor plate 12 includes a box-shaped main body 14 with an octagonal plane and a box-shaped main body 14 provided with floor supports 13 and 13' on the bottom plate.
Upper surface load-bearing floor plate 15 forming the lid of the upper surface floor plate 1
6, and a first main diagonal steel that passes from one end of the upper load-bearing floor plate 15 to the other end of the upper load-bearing floor plate 15 through the node between the floor support 13 and the bottom plate of the box-shaped main body 14. The rod 17, the second main diagonal steel rod 18 that passes from the end of the upper load-bearing floor plate 15 to the middle part of the floor support 13' and reaches the center of the upper load-bearing floor plate 15, and the upper part of the floor supports 13, 13'. Sub-oblique steel rod 19 connecting the side bottom plate ends of the box-shaped main body 14
formed by. The side plates and floor supports 13, 13' of the box-shaped main body 14 are appropriately provided with openings 20 to reduce their own weight and to be used for equipment piping. The upper surface load-bearing floor plate 15 is formed into a rectangular flat plate shape, and has a box-shaped main body 14 whose both ends are connected to the pillared floor plate 3.
The middle part is attached to the floor support bases 13 and 13' by anchor bolts, respectively, on the side plates of the base plate. The upper floor plate 16 is connected to the upper load-bearing floor plate 15 and installed on the left and right sides thereof, and is removably attached to the box-shaped main body 14 and the floor supports 13, 13' with anchor bolts. The first main diagonal steel bar 17 has its left and right ends connected to the upper surface load-bearing floor plate 1.
The center bending part is fixed to the bottom plate of the box-shaped main body 14, and the main body 14 is installed by tightening the nuts of the threaded parts at both ends and applying a tensile force. The second main diagonal steel rod 18 has one end passing through the edge of the upper load-bearing floor plate 15, the other end passing through the center of the upper load-bearing floor plate 15, and its central bent portion fixed to the floor support 13'. It is installed by tightening the nuts on the threaded parts at both ends and applying tension. The upper end of the secondary diagonal steel rod 19 is connected to a connecting steel member fixed to the upper part of the floor supports 13, 13', and the lower end thereof is passed through the bottom plate edge of the box-shaped main body 14, and the nut of the threaded portion at the lower end is tightened. , installed with a tensile force introduced.

FIGS. 11 to 15 show examples of the column strip floor plate 12 with an octagonal plane, and the column strip floor plate 1 with a hexagonal plane.
In the case of 2', the shape is almost the same as the case of the octagonal plane except that the shape of the box-shaped main body and the upper floor plate are different.

The joints between the column floor plates 3, 3' and the column strip floor plates 12, 12' are seat joints with gaps 21 maintained to absorb construction errors, and when tightening the bolts 22, A gap adjusting plate 23 is inserted into the gap 21 between the sections, and the side plates of the column floor plates 3 and 3' and the side plates of the column strip floor plates 12 and 12' are joined with bolts 22. The joint between the column strip floor plates 12 and 12' is a butt joint with a gap 21 maintained to absorb construction errors, and a gap adjustment plate 23 is inserted into the gap 21 at the bolt tightening part to improve the connection between the two. The side plates are joined with bolts 22.

As shown in FIG. 1, column strip floor plates 12, 12'
An intermediate floor plate 24 is installed in the area surrounded by , and the intermediate floor plate 24 and the column band floor plates 12, 12' are joined with bolts.

As shown in FIGS. 16 to 21, the intermediate floor plate 24 consists of a box-shaped main body 26 with a rectangular plane on which a floor support bundle 25 is provided on the bottom plate, and an upper floor plate 27 forming a lid of the box-shaped main body 26. The main diagonal steel rod 2 runs from the reinforced concrete outer shell and the upper part of the corner of one side plate of the box-shaped main body 26, passes through the node between the floor support bundle 25 and the bottom plate of the box-shaped main body 26, and reaches the upper part of the corner of the other side plate.
8, and from one bottom plate end of the box-shaped main body 26,
It is formed by a sub-oblique steel bar 29 that passes through the node between the floor support bundle 25 and the upper floor plate 27 and reaches the end of the other bottom plate. On the side plate of the box-shaped main body 26 are column strip floor plates 12,1.
An opening 20' is provided to match the opening 20 of the 2' side plate. The upper floor plate 27 is removably attached to the side plates of the box-shaped main body 26 and the floor support bundle 25 by anchor bolts. Main diagonal steel bar 2
8, the left and right ends are passed through the upper part of the corner of the side plate,
The central bent portion is fixed to the bottom plate of the box-shaped main body 26, and the box-shaped main body 26 is mounted with the nuts of the threaded portions tightened to apply a tensile force. The sub-oblique steel rod 29 has its left and right ends passed through the bottom plate edge of the box-shaped main body 26, and its central bent portion is fixed to the upper part of the floor support bundle 25.
It is installed by tightening the nuts on the threaded parts at both ends and applying tension.

The joint between the column band floorboards 12, 12' and the intermediate floorboard 24 is a seated joint that maintains a gap 21 to absorb construction errors. When tightening the bolts 22, the gap 21 at the bolt tightening part The gap adjusting plate 23 is inserted, and the side plates of the column band floor plates 12, 12' and the side plates of the intermediate floor plate 24 are joined with bolts 22.

The column floor plates 3, 3', the column band floor plates 12, 12', and the intermediate floor plate 24 are assembled and installed with the upper floor plates 9, 16, 27 removed, and the upper floor plates are installed after the construction is completed.

As shown in FIG. 9, a second floor cylindrical column 2' is installed on the column support base 7 of the column-equipped floor plate 3 to form a third floor in the same way as the second floor. The cylindrical column 2' on the second floor is installed by fitting the lower end into the convex part 5 of the column-equipped floor plate 3, and the adjustment plate 6
The lower end surface is brought into close contact with the upper surface of the floor plate 3 with pillars. The PC steel rod 4' shall be connected to the head of the existing PC steel rod 4 with a coupler.

The outer wall 30 including the window shall be attached to the column floor plate 3' or the column strip floor plate 12', and the column column floor plate 3' and column strip floor plate 12' shall be designed to balance the floor load and the own weight of the outer wall. shall be formed so as to maintain it.

In the structure formed as described above, blocks 31 such as a staircase, an elevator room, or a toilet are installed using the conventional prefabricated construction method as shown in FIG. 22 or 23.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a part of the building of the present invention, FIG. 2 is a longitudinal sectional view taken along line AA, and FIG. 3 is a longitudinal sectional view taken along line BB. FIG. 4 is an explanatory diagram showing the structural features of the random joint type assembled floorboard of the present invention. FIG. 5 is a plan view showing a portion of a conventional prefabricated structure building, and FIG. 6 is a longitudinal sectional view taken along the line C--C showing its structural features. FIG. 7 is a plan view and a cross-sectional view of the floor plate with pillars of the present invention, and FIG. 8 is a side view thereof. FIG. 9 is a vertical sectional view of a part of the building of the present invention, including a DD longitudinal section of the pillared floorboard, and FIG. 10 is an EE longitudinal sectional view of the pillared floorboard of the invention. 11th
The figures are a plan view and a cross-sectional view of the column strip floor plate of the present invention, FIG. 12 is a vertical cross-sectional view taken along the line FF, and FIG. 14 is a vertical cross-sectional view taken along the line GG. FIG. 13 is a side view of the column strip floor plate of the present invention on the side connected to the column floor plate, and FIG. 15 is a side view of the side connected to the intermediate floor plate. FIG. 16 is a plan view and a cross-sectional view of the intermediate floor plate of the present invention, FIG. 17 is a vertical cross-sectional view along H-H, FIG. 19 is a vertical cross-sectional view along II, and FIG. 20 is a vertical cross-sectional view along J-J. FIG. Figure 18 and 2
FIG. 1 is a side view of the intermediate floorboard of the present invention. 22nd
23 are overall plan views showing two embodiments of the present invention. 2, 2'... Cylindrical column, 3, 3'... Floor plate with column,
4, 4'...PC steel bar, 10... Oblique steel bar, 11...
Compression diagonal members, 12, 12'...column band floorboards, 17...
...First main diagonal steel bar, 18...Second main diagonal steel bar, 19,
29...Sub diagonal steel bar, 22...Bolt, 24...Intermediate floor plate, 28...Main diagonal steel bar.

Claims (1)

[Scope of Claims] 1. In a building in which the structure of the above-ground part is formed by pillars and floorboards, a floorboard with pillars extending horizontally from the pillars in the shape of an eave is fixed to each pillar, and the pillars are fixed to each pillar. Between the attached floorboards, a column strip floorboard whose floorboard width is different from that of the columnar floorboard is spread like a beam, and the edge of the columnar strip floorboard is joined to the edge of the columnar floorboard, The adjacent edges of each column strip floor plate that are concentrated on the column floor plate are joined together, and an intermediate floor plate is installed in the space surrounded by the column strip floor plates, and the edge of the intermediate floor plate is connected to the surrounding pillars. This is a non-receiving board structure building using random joint type assembly floor boards, characterized in that they are joined to the edges of row band floor boards. 2. The floor plate with columns and the intermediate floor plate are flat plates with a square plane, and the column strip floor plate is a hexagonal plane that combines a square plane and a trapezoidal plane, or an eight-sided plane that combines a square plane and two trapezoidal planes. 2. A building with a slatted board structure using a random joint type assembly floor board according to claim 1, which is a flat plate-like body having a square plane. 3. A recess board using a random joint type assembly floor board according to claim 2, wherein the flat plate-shaped body is a reinforced concrete body, a reinforced concrete body having a hollow part, or a reinforced concrete body having a hollow part equipped with reinforcing steel material. Structural buildings. 4. The random joint type assembly according to claim 3, wherein the reinforced concrete body having a hollow part or the reinforced concrete body having a hollow part and having a reinforcing steel material is a flat plate-like body formed so that the upper body and the lower body can be separated. A building with a solid board structure using floorboards. 5. The random joint type assembly according to claim 3 or 4, wherein the reinforcing steel material is mainly composed of a plurality of diagonal steel bars arranged by introducing tensile force into the hollow part of the reinforced concrete body. A building with a solid board structure using floorboards. 6. A patent in which the column is a reinforced concrete cylindrical body with steel bars passing through the hollow part, and tensile force is introduced into the steel bars to bond the column and the foundation, and the column and the floor plate with the column by pressure bonding. A solid board structure building using a random joint type assembly floor board according to claim 1 or 2, or 3, or 4, or 5.