JP7603531B2 - Wood composite wall structure - Google Patents

Description

The present invention relates to a wood composite wall structure.

A wall structure is known that includes a reinforced concrete earthquake-resistant wall and a wooden earthquake-resistant wall that covers the surface of the reinforced concrete earthquake-resistant wall (see, for example, Patent Document 1).

In addition, a steel plate concrete wall structure is known in which concrete is poured between steel plates (see, for example, Patent Document 2).

Furthermore, a building block is known that includes a pair of opposing decorative panels and a connecting member that connects the pair of decorative panels together (see, for example, Patent Document 3).

JP 2015-040401 A JP 2002-339485 A JP 2003-003591 A

The technology disclosed in Patent Document 1 can enhance the design by covering the surface of a reinforced concrete earthquake-resistant wall with a wooden earthquake-resistant wall, but there is room for improvement in terms of workability, since temporary formwork must be installed and removed when constructing the reinforced concrete earthquake-resistant wall.

Taking the above facts into consideration, the present invention aims to improve the ease of construction of wood composite wall structures while enhancing their design.

The wooden composite wall structure described in claim 1 includes a frame having a pair of columns and upper and lower beams erected on the pair of columns, a pair of wooden panelings arranged between the upper and lower beams and facing each other in the out-of-plane direction of the frame, a partition plate connecting the pair of wooden panelings and dividing the space between the pair of wooden panelings into a plurality of filled spaces in the material axis direction of the beams, and filled concrete filled into each of the plurality of filled spaces and joined to the upper and lower beams.
Equipped with.

According to the composite wood wall structure of claim 1, the frame has a pair of columns and upper and lower beams erected on the pair of columns. A pair of wood panelings is placed between the upper and lower beams. The pair of wood panelings face each other in the out-of-plane direction of the frame. The pair of wood panelings are connected by a partition plate. The partition plate divides the space between the pair of wood panelings into multiple filled spaces in the material axis direction of the beams. The multiple filled spaces are filled with filling concrete that is joined to the upper and lower beams. In this way, a composite wood wall is formed.

Here, the pair of wooden panels and the partition plate function as a formwork for the filling concrete. This eliminates the need to temporarily install or remove a formwork for filling concrete. This makes it possible to improve the design while also improving the ease of construction of the wooden composite wall.

In addition, by connecting a pair of wooden panels with a partition board, it is possible to prevent the pair of wooden panels acting as formwork from opening when filling with concrete.

Furthermore, the filled concrete is joined to the upper and lower beams. This allows seismic forces (horizontal forces) to be transmitted from the upper and lower beams to the filled concrete during an earthquake. The seismic forces transmitted to the filled concrete are then transmitted to the pair of wooden paneling through the partition boards. In this way, not only the filled concrete but also the pair of wooden paneling can resist seismic forces during an earthquake, improving the earthquake resistance of the composite wooden wall.

In addition, by filling multiple spaces separated by partition boards with concrete and dividing the concrete into multiple parts, the concrete resists earthquake forces like a bending column. This improves the toughness of the wood composite wall, thereby enhancing its deformation performance.

The composite wooden wall structure described in claim 2 is the composite wooden wall structure described in claim 1, which includes multiple pairs of the wooden panel members arranged in the material axis direction of the beam, and the multiple pairs of the wooden panel members are joined in a state where the partition plates provided at each end are overlapped.

According to the wooden composite wall structure of claim 2, there are multiple pairs of wooden panel members arranged in the material axis direction of the beam. The multiple pairs of wooden panel members are joined in a state where the partition plates provided at each end are overlapped.

By providing partition plates at the ends of a pair of wooden panels in this way, the wooden composite wall can be easily expanded as needed.

The composite wood wall structure described in claim 3 is the composite wood wall structure described in claim 1 or claim 2, and further includes a connecting reinforcing bar that is embedded in the filled concrete and connects the filled concrete to the beam.

According to the wood composite wall structure of claim 3, a connecting reinforcing bar is embedded in the filled concrete. By connecting the filled concrete to the upper and lower beams with this connecting reinforcing bar, the earthquake resistance of the wood composite wall can be improved.

As explained above, the present invention can improve the ease of construction of wood composite wall structures while enhancing the design.

FIG. 2 is an elevational view showing a frame and a wooden composite wall to which a wooden composite wall structure according to one embodiment is applied. FIG. 2 is an elevational sectional view showing the upper beam and the upper portion of the wood composite wall shown in FIG. FIG. 2 is an elevational cross-sectional view showing the lower beam and the lower portion of the wood composite wall shown in FIG. 1 . This is a cross-sectional view taken along line 4-4 in Figure 1. This is a cross-sectional plan view showing a wooden composite wall to which a modified example of a wooden composite wall structure according to one embodiment is applied. A modified example of a wooden composite wall structure according to one embodiment is shown in a cross-sectional plan view of a pillar and a wooden composite wall. A modified example of a wooden composite wall structure according to one embodiment is shown in a cross-sectional plan view of a pillar and a wooden composite wall.

Below, we will explain one embodiment of a wooden composite wall structure with reference to the drawings.

(Wood composite wall structure)
As shown in FIG. 1 , the wooden composite wall structure according to this embodiment includes a framework 10 and a wooden composite wall 40 .

(Structure)
The frame 10 is a rigid frame having a pair of columns 20 and an upper beam 30U and a lower beam 30L erected on the pair of columns 20. The pair of columns 20 are, for example, made of reinforced concrete and are erected with a horizontal gap between them. Each column 20 has a plurality of column main reinforcements 22 and a plurality of shear reinforcements 24 (see FIG. 6 ) embedded therein.

The upper beam 30U and the lower beam 30L are erected on a pair of columns 20 with a gap between them in the vertical direction. As shown in FIG. 2, the upper beam 30U is made of reinforced concrete, and multiple beam main bars 32 and multiple shear reinforcement bars 34 are embedded inside. Similarly, as shown in FIG. 3, the lower beam 30L is made of reinforced concrete, and multiple beam main bars 32 and multiple shear reinforcement bars 34 are embedded inside.

In addition, the arrow X shown in each figure indicates the material axis direction of the upper beam 30U and the lower beam 30L (the width direction of the wood composite wall 40). The arrow Y direction indicates the out-of-plane direction of the frame 10 (the thickness direction of the wood composite wall 40). The upper beam 30U and the lower beam 30L are examples of upper and lower beams.

(Wood composite wall)
1, the wooden composite wall 40 is, for example, an earthquake-resistant wall or a load-bearing wall provided within the structural surface of the frame 10. The wooden composite wall 40 is disposed between the upper beam 30U and the lower beam 30L. The upper end of the wooden composite wall 40 is joined to the upper beam 30U. Similarly, the lower end of the wooden composite wall 40 is joined to the lower beam 30L.

The wood composite wall 40 and the pair of columns 20 are not joined, and an opening 26 is formed between each of the wood composite walls 40 and the pair of columns 20.

The composite wood wall 40 has multiple (two in this embodiment) wall sections 42. The wall sections 42 are arranged adjacent to each other in the width direction of the composite wood wall 40 (the material axis direction of the upper beam 30U and the lower beam 30L), and their ends are joined together.

As shown in FIG. 4, each wall section 42 has a pair of wooden paneling 44, a pair of end partition boards 50, a middle partition board 54, a plurality of filled concrete 60, and a plurality of unit wall reinforcement bars 70. The pair of wooden paneling 44, the pair of end partition boards 50, and the middle partition board 54 are formed from CLT (Cross Laminated Timber).

The pair of wooden panelings 44, the pair of end partition plates 50, and the intermediate partition plate 54 are not limited to CLT, and may be formed from, for example, wooden boards such as laminated veneer lumber (LVL) or laminated lumber. The intermediate partition plate 54 is also not limited to wooden boards, and may be formed from metal plates, shaped steel, etc.

As shown in FIG. 1, the pair of wooden panel members 44 are formed in a rectangular shape when viewed in the thickness direction (outside the plane of the frame 10) and are arranged across the lower surface of the upper beam 30U and the upper surface of the lower beam 30L.

As shown in FIG. 4, a pair of wooden paneling 44 are arranged facing each other in the out-of-plane direction (arrow Y direction) of the frame 10 with a gap in between. The pair of wooden paneling 44 are connected by a pair of end partition plates 50 and a middle partition plate 54. The end partition plates 50 and the middle partition plate 54 are examples of partition plates.

The pair of end partition plates 50 are arranged on both sides of the pair of wooden surface materials 44 in the width direction (arrow X direction). The pair of end partition plates 50 are the same height as the pair of wooden surface materials 44, and span from the lower end to the upper end of the pair of wooden surface materials 44. The pair of end partition plates 50 are also arranged opposite each other in the width direction of the pair of wooden surface materials 44.

Each end partition plate 50 is arranged across the widthwise ends 44E of a pair of wooden surface materials 44. The inner surface 50S of each end partition plate 50 is placed over the end faces of the ends 44E of the pair of wooden surface materials 44 and is fixed to the end faces with wood screws 46. This connects the ends 44E of the pair of wooden surface materials 44 together via the pair of end partition plates 50.

The multiple wall sections 42 are arranged with their respective wooden paneling 44 lined up in the width direction. In other words, the wooden composite wall 40 has multiple pairs of wooden paneling 44 aligned in the material axis direction of the upper beam 30U and the lower beam 30L. Adjacent wall sections 42 are arranged with their respective end partition plates 50 overlapping each other. The overlapping end partition plates 50 are joined via a pair of connecting plates 52.

The pair of connecting plates 52 are arranged on both sides of the overlapping end partition plates 50 in the width direction (outside the plane of the frame 10). The pair of connecting plates 52 are also at the same height as the pair of wooden surface panels 44, and extend from the lower end to the upper end of the end partition plates 50.

Each connecting plate 52 is arranged across the end face of the stacked end partition plates 50 in the width direction and is fixed to the end face with a wood screw 46. In this way, the stacked end partition plates 50 are joined by a pair of connecting plates 52.

The intermediate partition plate 54 is disposed between a pair of wooden surface materials 44. The intermediate partition plate 54 is also disposed between a pair of end partition plates 50, and faces each of the pair of end partition plates 50. The intermediate partition plate 54 is at the same height as the pair of wooden surface materials 44, and spans from the lower end to the upper end of the pair of wooden surface materials 44.

The intermediate partition plate 54 is disposed across the inner surfaces (opposing surfaces) 44S of the pair of wooden surface materials 44. The end faces of the intermediate partition plate 54 are overlapped with the inner surfaces 44S of the pair of wooden surface materials 44 and are fixed to the inner surfaces 44S with wood screws 46. The intermediate partition plate 54 and the pair of end partition plates 50 divide the space between the pair of wooden surface materials 44 into multiple (two) filling spaces R in the material axis direction of the upper beam 30U and the lower beam 30L.

At least one filling space R can be formed between a pair of wooden panels 44.

The multiple filling spaces R are each filled with filling concrete 60. The filling concrete 60 is filled from the lower end to the upper end of the filling space R. In addition, unit wall reinforcement 70 is embedded in each of the filling concrete 60.

The unit wall reinforcement 70 has a pair of vertical reinforcement 72 and multiple horizontal reinforcement 74, and is arranged in each of the multiple filling spaces R. The pair of vertical reinforcement 72 extends in the vertical direction and is arranged with a gap in the width direction of the wood composite wall 40. The pair of vertical reinforcement 72 is connected by multiple horizontal reinforcement 74.

The multiple horizontal bars 74 extend in the width direction of the wood composite wall 40 and are spaced apart in the vertical direction. Each horizontal bar 74 is arranged across a pair of vertical bars 72 and is joined to the pair of vertical bars 72 by a tie wire, welding, or the like (not shown). The filled concrete 60 is reinforced by these unit wall bars 70.

As shown in FIG. 2, the filled concrete 60 and the upper beam 30U are joined via a joint rebar 80U. The lower end of the joint rebar 80U is embedded in the upper part of the filled concrete 60. Meanwhile, the upper end of the joint rebar 80U is embedded in the upper beam 30U. The upper end of this joint rebar 80U is bent in an L-shape along the material axis direction of the upper beam 30U.

As shown in FIG. 3, the filled concrete 60 and the lower beam 30L are joined via a joint reinforcing bar 80L. The upper end of the joint reinforcing bar 80L is embedded in the lower part of the filled concrete 60. Meanwhile, the lower end of the joint reinforcing bar 80L is embedded in the lower beam 30L. The lower end of this joint reinforcing bar 80L is bent in an L-shape along the material axis direction of the lower beam 30L.

(Action)
Next, the operation of this embodiment will be described.

According to this embodiment, the frame 10 has a pair of columns 20, and an upper beam 30U and a lower beam 30L that are installed on the pair of columns 20. A pair of wooden paneling 44 is arranged between the upper beam 30U and the lower beam 30L.

A pair of wooden paneling 44 faces each other in the out-of-plane direction of the frame 10. The pair of wooden paneling 44 is connected by a pair of end partition plates 50 and a middle partition plate 54. The pair of end partition plates 50 and the middle partition plate 54 divide the space between the pair of wooden paneling 44 into multiple filled spaces R in the material axis direction of the upper beam 30U and the lower beam 30L.

Each of the multiple filled spaces R is filled with filled concrete 60 that is joined to the upper beams 30U and the lower beams 30L. This forms the wood composite wall 40.

Here, the pair of wooden paneling 44, the pair of end partition boards 50, and the middle partition board 54 function as a formwork for the filled concrete 60. This eliminates the need to temporarily install or remove a formwork for the filled concrete 60. This makes it possible to improve the design while also improving the ease of construction of the wooden composite wall 40.

In addition, by connecting a pair of wooden surface panels 44 with a pair of end partition plates 50 and a middle partition plate 54, it is possible to prevent the pair of wooden surface panels 44 from opening as a formwork when filling with filling concrete 60. Therefore, for example, separators connecting a pair of wooden surface panels 44 can be omitted, improving workability.

Furthermore, the filled concrete 60 is joined to the upper beam 30U and the lower beam 30L. As a result, during an earthquake, seismic force (horizontal force) is transmitted from the upper beam 30U and the lower beam 30L to the filled concrete 60. The seismic force transmitted to the filled concrete 60 is transmitted to the pair of wooden surface materials 44 via the pair of end partition plates 50 and the middle partition plate 54. In this way, during an earthquake, not only the filled concrete 60 but also the pair of wooden surface materials 44 can resist seismic force, improving the earthquake resistance performance of the wooden composite wall 40.

In particular, the wooden surface material 44 in this embodiment is made of CLT, which has high rigidity (surface rigidity). This further improves the earthquake resistance of the wooden composite wall 40.

In addition, connecting rebars 80U, 80L are embedded in the upper and lower parts of the multiple filled concrete 60. These connecting rebars 80U, 80L connect each filled concrete 60 to the upper beam 30U and the lower beam 30L, respectively, so that seismic forces can be transmitted more reliably from the upper beam 30U and the lower beam 30L to the filled concrete 60.

Furthermore, by filling each of the multiple filling spaces R with concrete 60 and dividing the concrete 60 into multiple pieces, the multiple concretes 60 resist earthquake forces like bending columns. As a result, in this embodiment, the bending deformation of the wood composite wall 40 is superior compared to when multiple pieces of concrete 60 are integrated, improving the toughness of the wood composite wall 40. Therefore, the deformation performance of the wood composite wall 40 can be improved.

A stripping agent may be applied to the inner surfaces 50S of the pair of end partition plates 50 and to the surfaces (inner surfaces) 54S on both sides of the middle partition plate 54 to make it easier to strip the filled concrete 60 from these inner surfaces 50S, 54S during an earthquake. This can further improve the toughness of the wood composite wall 40.

The composite wood wall 40 also has a number of wall sections 42. Each wall section 42 has a pair of wood paneling 44. In other words, the composite wood wall 40 has multiple pairs of wood paneling 44 aligned in the material axis direction of the upper beam 30U and the lower beam 30L. The multiple pairs of wood paneling 44 are joined together with the end partition plates 50 provided at each end overlapping each other.

In this way, by providing end partition plates 50 at the ends of a pair of wooden panels 44 in adjacent wall sections 42, the wooden composite wall 40 can be easily expanded as needed.

(Modification)
Next, a modification of the above embodiment will be described.

In the modified example shown in FIG. 5, a plurality of wood screws 62 are provided on the inner surface 44S of the pair of wood paneling 44. The plurality of wood screws 62 protrude from the inner surface 44S of the pair of wood paneling 44 and are embedded in the filled concrete 60. This allows the shear force between the pair of wood paneling 44 and the filled concrete 60 to be transmitted via the plurality of wood screws 62. This improves the earthquake resistance of the wood composite wall 40.

The wood screws 62 are an example of a shear force transmission part. Also, the inner surface 44S of the wooden surface material 44 may be provided with a shear force transmission part such as a rib or unevenness, not limited to the wood screws 62.

In the modified example shown in FIG. 5, metal plates 90 are attached to the inner surfaces 50S of the pair of end partition plates 50. Each metal plate 90 is made of a steel plate or the like. In addition, each metal plate 90 is bent in a C-shape along the inner surface 50S of the end partition plate 50 and the inner surfaces 44S of the pair of wooden panel materials 44 in a planar cross-sectional view.

Metal plates 90 are attached to the surfaces (inner surfaces) 54S on both sides of the intermediate partition plate 54. Each metal plate 90 is made of a steel plate or the like. Each metal plate 90 is bent in a C-shape along the inner surfaces 54S of the intermediate partition plate 54 and the inner surfaces 44S of the pair of wooden paneling members 44 in a planar cross-sectional view.

A release agent is applied to the surface of the metal plate 90 to which the filled concrete 60 is attached. This makes it easier for the filled concrete 60 to peel off from the pair of end partition plates 50 and the middle partition plate 54 during an earthquake. This further increases the toughness of the wood composite wall 40.

In addition, in the above embodiment, the pair of columns 20 and the wood composite wall 40 are not joined. However, for example, as in the modified example shown in FIG. 6, the wood composite wall 40 and the columns 20 may be joined.

Specifically, in the wood composite wall 40, the end 44E of the pair of wood paneling 44 facing the column 20 is not provided with an end partition plate 50 (see FIG. 4), and the end 44E abuts against the side surface 20S of the column 20. In addition, a pair of positioning members 100 are provided on the outer surface of the end 44E of the pair of wood paneling 44. The pair of positioning members 100 are formed from wood boards such as CLT, and are arranged along the end 44E of the pair of wood paneling 44.

The pair of positioning members 100 are fixed to the side surface 20S of the pillar 20 with a plurality of screws (concrete screws) 102 or the like. The pair of positioning members 100 prevent the opening of the ends 44E of the pair of wooden surface members 44 when filling concrete 60 is filled between the pair of wooden surface members 44.

In addition, a plurality of anchor bars 110 are provided on the side surface 20S of the column 20. The plurality of anchor bars 110 are arranged at intervals in the vertical direction. The plurality of anchor bars 110 also protrude from the side surface 20S of the column 20 and are embedded in the filled concrete 60. These anchor bars 110 are connected to the horizontal bars 74 of the unit wall bars 70, for example, by lap joints or the like.

In this way, by joining the pillar 20 and the filled concrete 60 via the anchor bars 110, the earthquake resistance of the wooden composite wall 40 can be improved.

In the modified example shown in FIG. 6, the anchor bars 110 are post-installed anchors, but in the case of new construction, for example, the anchor bars may be embedded integrally with the pillars 20 when the pillars 20 are installed.

Also, as shown in the modified example in FIG. 7, instead of the pair of positioning members 100, the ends 44E of the pair of wooden surface members 44 may be connected via a separator 120. This separator 120 prevents the ends 44E of the pair of wooden surface members 44 from opening when filling concrete 60 is filled between the pair of wooden surface members 44.

In addition, the wood composite wall 40 in the above embodiment has multiple wall sections 42. However, it is sufficient for the wood composite wall 40 to have at least one wall section 42.

In the above embodiment, a pair of wooden paneling 44 is connected by a pair of end partition plates 50 and an intermediate partition plate 54. However, the intermediate partition plate 54 may be provided as necessary and may be omitted as appropriate. As described above, when joining a wooden composite wall 40 to a pillar 20, the end partition plate 50 may also be omitted. In other words, a pair of wooden paneling 44 can be connected by at least one of the end partition plates 50 and the intermediate partition plate 54.

In the above embodiment, the end partition plate 50 is joined in an overlapping state to the end faces of the ends 44E of the pair of wooden surface materials 44. However, similar to the intermediate partition plate 54, the end partition plate 50 may be disposed between the ends 44E of the pair of wooden surface materials 44, and joined in an overlapping state to the inner surface 44S of the ends 44E of the pair of wooden surface materials 44.

In addition, in the above embodiment, the unit wall reinforcement 70 and the connecting reinforcement bars 80U, 80L are embedded in the filled concrete 60. However, the unit wall reinforcement 70 and the connecting reinforcement bars 80U, 80L may be provided as needed and may be omitted as appropriate.

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and one embodiment and various modified examples may be used in appropriate combination, and the present invention may of course be embodied in various forms without departing from the spirit of the present invention.

10 Frame 20 Column 30U Upper beam (upper beam)
30L Lower beam (lower beam)
44 Wood surface material 50 End partition board (partition board)
54 Intermediate partition plate (partition plate)
60 Filled concrete 80L Joint reinforcing bar 80U Joint reinforcing bar R Filled space arrow X Beam material axis direction arrow Y Out-of-plane direction of frame

Claims (3)

A frame having a pair of columns and upper and lower beams installed on the pair of columns;
A pair of wooden surface materials are arranged between the upper and lower beams and face each other in an out-of-plane direction of the frame;
A partition plate that connects a pair of the wooden surface materials and divides the space between the pair of the wooden surface materials into a plurality of filled spaces in the material axis direction of the beam;
Filled concrete is filled into each of the plurality of filling spaces and joined to the upper and lower beams;
A wood composite wall structure. The beam is provided with a plurality of pairs of the wooden surface materials arranged in the material axis direction of the beam,
A plurality of pairs of the wooden surface materials are joined in a state where the partition plates provided at each end are overlapped with each other.
The wood composite wall structure according to claim 1. A joint reinforcing bar is embedded in the filled concrete and connects the filled concrete to the beam.
The wood composite wall structure according to claim 1 or 2.