JP2023170142A - Woody member concrete member composite structure - Google Patents

Abstract

To provide a composite cross-sectional structural member in which a concrete member reinforced with steel and a woody member are integrally arranged in a balanced cross-sectional ratio.SOLUTION: A steel-reinforced concrete member 12 is sandwiched between woody members 11U, 11L made of structural laminated lumber to be structurally integrated, and a plurality of shearing force transmission means 16, 17 are provided between the concrete member 12 and the woody members 11U, 11L along the longitudinal direction of the member so as to constitute a composite structural member, and when used as a constituent member (horizontal member 10) of a structure, the composite structural member can be integrally deformed against acting external force to exhibit sufficient strength.SELECTED DRAWING: Figure 3

Description

TECHNICAL FIELD The present invention relates to a wood-concrete-composite structure that integrates a wood member and a reinforced concrete member and is applied to a horizontal frame member or a vertical support member.

As an example of a conventional composite structural member that integrates a wooden member and a reinforced concrete member, there is a beam member 100 (horizontal member) having a T-shaped cross section shown in FIG. In the horizontal member 100 having the cross-sectional shape shown in the figure, the flange portion made of the reinforced concrete member 101 and the web portion made of the wooden member 102 are integrally joined, and behave so as to maintain the cross-sectional shape of the beam during bending. . In this case, although the bending rigidity of the beam is improved due to the effect of the composite cross section of the reinforced concrete member 101 and the wooden member 102, it is not expected that the beam resistance will be improved much. On the other hand, when used as a vertical support member such as a column, there is a problem that if a large compressive force is to be maintained, the cross section becomes too large and an appropriate architectural plan cannot be realized.

Further, there is a composite beam disclosed in Patent Document 1 as an example of a composite structural member of a wooden member and a reinforced concrete member. In this composite beam, the reinforced concrete member is a T-shaped cross-sectional beam, and a wooden member is used as a side member that covers the side surface of the web portion. Furthermore, in order to unify the stress burden between the reinforced concrete member and the wooden member, a plurality of bolts passing through the beam web portion in the width direction are tightened with nuts as stress sharing means.

Japanese Patent Application Publication No. 2022-15390

In the horizontal member 100 constituting the composite beam shown in FIG. 18, a reinforced concrete member 101 having a predetermined beam width is placed on the top surface of a wooden member 102, and the two are integrated with bolts or the like. 102 will be aligned vertically, resulting in a large member size (beam size). When the height of the horizontal members 100 increases, the ceiling becomes lower, and it is necessary to increase the floor height in order to secure a predetermined ceiling height. Therefore, there are problems in that the height of the building increases, the number of external walls increases, and the construction cost increases. Further, as a structural problem, it is not expected that the strength of the horizontal member 100 will be improved just by stacking the reinforced concrete member on top of the wooden member.

Furthermore, in the composite beam disclosed in Patent Document 1, the reinforced concrete beam and the wooden material exhibit an integral mechanical behavior due to the function of the bolts as stress sharing means, but the reinforced concrete beam with a large cross-sectional area is the main component of the structure. The wood material with a small cross-sectional area provided on the sides is an auxiliary structural member, and only a small stress burden is considered. Further, a cross-sectional shape as a vertical support member is not assumed.

SUMMARY OF THE INVENTION Therefore, the purpose of the present invention is to solve the problems of the above-mentioned conventional techniques, and to form a composite cross section in which concrete members including reinforcing materials such as reinforcing bars and wood members are integrally arranged with a well-balanced cross-sectional ratio. To provide a composite structure of wooden members and concrete members, which can function as an effective composite structure during bending in horizontal members and improve beam bearing strength, and can improve column bearing strength against axial compression in axial support members. It is in.

The present invention is a composite structure in which a steel-reinforced concrete member is sandwiched and integrated with a wood member made of laminated laminated wood, and the composite structure deforms integrally in response to an external force acting on the composite structural member. It is characterized by having a possible composite cross section.

It is preferable that a plurality of shear force transmission means be provided between the concrete member and the wooden member along the longitudinal direction of the member.

Preferably, the shear force transmission means includes a steel plate inserted into the wooden member and the concrete member, and a drift pin that fixes and holds the steel plate.

Preferably, the shear force transmission means is a lag screw bolt arranged to connect the wooden member and the concrete member.

Preferably, the concrete member and the wood member are integrated by surface adhesion.

Preferably, the composite structure is manufactured into a member shape that can be applied to a horizontal member or a vertical support member of a structure.

Preferably, the concrete member is a reinforced concrete member, and the wood member is a structural laminated timber.

According to the present invention, in the horizontal frame members and the axial support members, a composite cross section is formed in which concrete members including reinforcing materials such as reinforcing bars and wood members are arranged at a well-balanced cross-sectional ratio. This has the effect of improving the bending strength, yield strength, and column yield strength against axial compression of the vertical support member.

FIG. 1 is a sectional view showing a cross section of a horizontal member as a first embodiment of the wooden member concrete member composite structure of the present invention. FIG. 2 is a schematic frame structure diagram showing an example of a column-beam structure to which the horizontal members shown in FIG. 1 are applied. FIG. 2 is a perspective view showing a part of the horizontal member cut away to explain the cross-sectional configuration of the horizontal member shown in FIG. 1; FIG. 2 is a cross-sectional view showing a cross section of a horizontal member as a second embodiment of the wooden member concrete member composite structure of the present invention. FIG. 5 is a schematic frame structure diagram showing an example of a column-beam structure to which the horizontal members shown in FIG. 4 are applied. FIG. 5 is a perspective view showing a part of the horizontal frame member cut away to explain the cross-sectional configuration of the horizontal frame member shown in FIG. 4; FIG. 3 is a sectional view showing a cross section of a horizontal member as a third embodiment of the wooden member concrete member composite structure of the present invention. FIG. 8 is a perspective view showing a part of the horizontal member cut away to explain the cross-sectional configuration of the horizontal member shown in FIG. 7; FIG. 4 is a sectional view showing a cross section of a horizontal member as a fourth embodiment of the wood member concrete member composite structure of the present invention. 10 is a perspective view showing a part of the horizontal member cut away to explain the cross-sectional configuration of the horizontal member shown in FIG. 9. FIG. 10 is a sectional view showing a modification example in which through holes are formed in the cross section of the beam of the horizontal member shown in FIG. 9. FIG. FIG. 10 is a sectional view showing a cross section of a wooden member in a modified example in which the reinforced concrete beam portion of the horizontal member having the configuration shown in FIG. 9 is constructed with cast-in-place concrete. 13 is a sectional view showing a modification example in which through holes are formed in the cross section of the reinforced concrete beam of the horizontal member shown in FIG. 12. FIG. FIG. 7 is a sectional view showing a cross section of a vertical support member (column member) in a fifth embodiment in which the wooden member concrete member composite structure of the present invention is applied to a vertical support member (column member). FIG. 1 is a schematic frame structure diagram showing an example in which the wooden member concrete member composite structure of the present invention is applied to a horizontal frame member (beam) and a vertical support member (column member). Sectional views showing two examples ((a), (b)) of cross-sectional shapes of a vertical support member in a sixth embodiment in which the wooden member-concrete member composite structure of the present invention is applied to a vertical support member (column member). In an example in which the wood-concrete member composite structure of the present invention is applied to horizontal members (beams) and vertical support members (column members), the column-beam joint (a) and the vertical support member (b) are made of reinforced concrete. A schematic frame structure diagram showing an example. FIG. 1 is a sectional view showing an example of a conventional T-shaped cross-sectional composite structural beam made of wood members and reinforced concrete members.

Hereinafter, structural examples of a plurality of embodiments of the wooden member concrete member composite structure of the present invention will be described with reference to the accompanying drawings. In the first to fourth embodiments, a synthetic structure as a horizontal member will be described, and in the fifth and sixth embodiments, a synthetic structure as a vertical support member will be described.

[First embodiment]
FIG. 1 shows a composite cross-sectional shape of a horizontal member 10 in which structural laminated timber is used for the wooden beam member 11 and concrete member is used for the reinforced concrete beam member 12, as a first embodiment of the wooden member concrete member composite structure of the present invention. FIG. As shown in FIG. 1, this horizontal member 10 is constructed by joining wooden beam members 11 having a rectangular cross-sectional shape and having a beam width smaller than that of the flat beam to the upper and lower sides of a flat beam-shaped reinforced concrete beam member 12. It is a composite structural member. In addition, in this embodiment, since the beam member of the rigid-frame structure illustrated in FIG. 2 is assumed as a horizontal member, the horizontal member explained in each embodiment of this invention is hereafter called the composite structure beam 10. Moreover, although precast concrete members are assumed to be used as the concrete members from the viewpoint of ease of manufacture, it goes without saying that the concrete members may be manufactured using concrete cast on site.

As shown in the figure, the wooden beam member 11 of the composite structural beam 10 of the present embodiment is made of structural laminated wood that is laminated and joined in a rectangular cross section with predetermined dimensions so as to sandwich the upper and lower sides of the reinforced concrete beam member. has been adopted. The structural laminated timber used in this embodiment is specified by the JAS standard, and includes a width direction bonding process to create two rows of laminated timber manufactured under the same conditions, and a lamination direction of multiple structural units in which lamina is laminated and bonded. It is manufactured through the adhesion (secondary adhesion) process. Specifically, the wooden beam member 11 is made by gluing two rows of laminated wood in the width direction, each having a unit width of 200 mm and a height of 375 mm, which are made by laminating and bonding lamina made of cedar, larch, etc. to a predetermined thickness. It is made up of members 400mm long and 375mm high.

The reinforced concrete beam member 12 constituting the composite structural beam 10 of this embodiment is a precast concrete member in the shape of a flat beam with a beam width of 700 mm and a beam depth of 150 mm, in which predetermined beam main reinforcements are arranged in the cross section. It is preferable that the effective width of a reinforced concrete beam is equal to or less than 1/4 of the width of the column to be joined (see FIGS. 2 and 3), the larger of the beam width, or the beam span.

The composite structural beam 10 of this embodiment shown in FIG. 1 is made by integrating a wooden beam member 11 with a rectangular cross section and a reinforced concrete beam member 12 with a flat beam shape, which have been separately manufactured in advance, through a predetermined manufacturing process in a factory or the like. Manufactured by joining. In this embodiment, the lower surface of the reinforced concrete beam member 12 and the upper surface of the lower wooden beam member 11L are integrally joined by drift pin joining and full-surface adhesion using an adhesive. In the drift pin joining, a threaded steel rod with a length of about 300 mm and a diameter of about 10 mm is used as the drift pin 16, and the arrangement pitch of the drift pins 16 in the longitudinal direction of the beam is set to about 200 mm (FIG. 3). The dimensions, arrangement pitch, etc. of the drift pins 16 are preferably determined in consideration of the strength of the wood, the tensile strength, bending strength, etc. of the drift pins 16. Further, a two-component epoxy resin adhesive is used for the entire surface bonding between the lower surface of the reinforced concrete beam member 12 and the upper surface of the wooden beam member 11.

In this embodiment, the upper surface of the reinforced concrete beam member 12 and the lower surface of the upper wooden beam member 11U are integrally joined by lag screw bolt connection and full-surface bonding with an adhesive, as shown in FIGS. 1 and 3. In the lag screw bolt connection, a threaded steel bar with a length of about 500 mm and a diameter of about M12 is used as the lag screw bolt 17. The arrangement pitch of the lag screw bolts 17 in the longitudinal direction of the beam is set to about 300 mm. A two-component epoxy resin adhesive is used to fully bond the upper surface of the reinforced concrete beam member 12 and the lower surface of the upper wooden beam member 11. The bolt diameter, arrangement pitch, etc. of the lag screw bolts 17 are preferably determined in consideration of wood strength, bolt tensile strength, bending strength, etc. Note that if sufficient joint strength is ensured by the lag screw bolt 17 at the joint surface, the length of the bolt may be shortened so that the entire length of the bolt fits within a portion of the wooden beam member 11. . In that case, each bolt hole may be filled with a filler using mortar or resin, and the opening may be closed with a wooden plug (not shown) to prevent the bolt hole from appearing on the top surface of the wooden beam member 11. preferable.

As shown in FIGS. 2 and 3, the composite structural beam constructed by integrating the reinforced concrete beam member 12 and the wooden beam member 11 as described above is such that the wooden beam member 11 is located at the upper and lower positions of the reinforced concrete beam member 12. It is part of the structure as a beam member with a beam length of 9 m (Fig. 2) that is placed in the ground, is integrally joined, and exhibits mechanical behavior in an integrated manner under applied loads along with column members as vertical support members (described later). Configure.

Here, several types of wooden members that can replace the structural laminated timber used as the wooden beam member 11 described above will be described. The following wooden members can be used as structural members equivalent to structural laminated timber.
(Structural veneer laminate (LVL))
Structural veneer laminated material is a laminated material standardized by the "JAS standard for veneer laminated materials", and the wooden beam member 11 of the present invention is a type A type in which there are almost no veneers perpendicular to the main fiber direction. It is preferable to use a grade material applicable to the beam member. Examples of applicable member dimensions are, for example, the width assumed in the present invention of 400 mm, the beam length as a wooden beam of 400 mm, and the beam length of about 9 m.
(lumber)
The sawn lumber is a board standardized by the "JAS Standard for Lumber", and the basic dimensions of the material are 120 mm in width and 360 mm in beam height, so it is preferable to handle it by collecting it so that it has a predetermined beam cross-sectional shape.
(CLT)
CLT is a laminated wood laminated with wood fiber directions perpendicular to each other, and is effective as a surface material that is resistant to deformation. Therefore, when used as a beam member, the function is limited, but since the anisotropy of the drift pin when performing steel plate insertion drift pin joining, which will be described later, is eliminated, a mechanical effect can be expected at the joint site. .

(shear force transmission member)
There are lag screw bolt joints and drift pin joints (described later) as joining means using joint bars as shear force transmitting members between the wooden beam member 11 and the reinforced concrete beam member 12, but instead of these, Anchor bolt connections using various threaded rods (threaded reinforcing bars, deformed steel bars, FRP rods, etc.), glue-in rods that fill and solidify adhesive around the connecting rod inserted as a core material into through holes for joining parts. GIR) bonding etc. can also be adopted. It is also preferable to attach a shear cotter, a shear plate, a split ring, etc. to the joint surface as an additional element, or to form an uneven surface of a predetermined shape on the joint surface, instead of joining through a joint rod.

Furthermore, in addition to two-component epoxy resin adhesives, polyurethane resin adhesives, two-component acrylic resin adhesives, water-based vinyl urethane adhesives, etc. can be used for surface bonding between wooden members and reinforced concrete beam members. It is preferable to select an adhesive that has high adhesion performance between the material and dissimilar materials such as steel plates.

[Second embodiment]
FIG. 4 shows a composite cross-sectional shape of a composite structural beam 20 in which a steel plate insertion drift pin connection is used to connect a wooden beam member 21 made of structural laminated timber and a reinforced concrete beam member 22, as a second embodiment of the present invention. FIG. Similar to the first embodiment, this composite structural beam 20 also has a cross-sectional shape in which wooden beam members 21 having the same cross-sectional shape are joined to the upper and lower positions of a flat beam-shaped reinforced concrete beam member 22, and the wooden beam members 21, reinforced concrete The constituent elements of the beam member 22 are also the same as in the first embodiment. In this composite structural beam 20, as shown in FIG. 4 and FIG. The reinforced concrete beam member 22 and the wooden beam member 21 are integrally joined by inserting a joining steel plate 25 which is partially supported embedded in the reinforced concrete beam member 22 and driving a large number of drift pins 26 from the side of the wooden beam member 21. ing. By employing this steel plate insertion drift pin joint, the appearance and workability of the composite structural beam 20 are improved, and the effect of exhibiting excellent performance as a moment resistance joint element can be expected.

The steel plate insertion drift pin joint, which is a characteristic component of this embodiment, will be described below with reference to FIGS. 4 to 6. In this embodiment, the dimensions of the steel plate 25 inserted and buried in the composite structural beam 20 are 750 mm long, 750 mm wide, and 12 mm thick, and as shown in FIG. 5, both beams of the completed composite structural beam 20 are They are buried approximately 2m from each end. A predetermined number of dowels 27 are attached to the sides of the steel plate 25 at the center position in the height direction, and when the reinforced concrete beam member 22 is manufactured, the steel plate 25 is embedded and held in the reinforced concrete beam member 22 around the positions of these dowels 27. (See Figures 4 and 6). As a result, the attachment and shearing of the steel plate 25 and the reinforced concrete beam member 22 are unified. Further, as shown in FIG. 6, a plurality of holes 28 are arranged in a row along the edge of the steel plate 25. By inserting drift pins 26 of a predetermined length into these holes 28 from the outer surface of the wooden beam member 21, the wooden beam member 21 and the reinforced concrete beam member 22 are integrated with the steel plate 25 as a core material. Further, the upper and lower surfaces of the reinforced concrete beam member 22 and the upper and lower surfaces of the wooden beam member 21 are fully bonded with a two-component epoxy resin adhesive. It goes without saying that the number and insertion positions of the steel plates 25 inserted into the composite structural beam 20 can be set as appropriate so that the integral behavior of the composite structural beam 20 is realized.

As described above, the composite structural beam 20 is constructed by integrating the reinforced concrete beam member 22 and the wooden beam member 21 by inserting steel plate drift pins, and the wooden beam member 21 is assembled at the time of factory manufacture, as in the first embodiment. 21 are integrally joined to the upper and lower positions of the reinforced concrete beam member 22, resulting in a precast beam member having a beam length of 9 m (FIG. 5) that exhibits mechanical behavior in an integrated manner under applied loads.

[Third embodiment]
FIG. 7 shows an example of the cross-sectional shape of a composite structural beam 30 as a third embodiment of the present invention, in which structural laminated timber is used for the wooden beam member 31 and a T-shaped cross-section precast reinforced concrete beam member 32 is used for the reinforced concrete beam member 32. FIG. As shown in FIG. 7, this composite structural beam 30 has a groove-shaped upper wooden beam member 31U having a rectangular cross section on the upper side of the reinforced concrete beam member 32 and a groove-like structure surrounding the web portion 32a of the reinforced concrete beam member 32 on the lower side. The lower wooden beam member 31L having a cross-sectional shape is arranged and joined.

In this embodiment, since the reinforced concrete beam member 32 has a T-shaped cross-section, the lower wooden beam member 31L that covers the side and lower surfaces of the web portion 32a has a groove-shaped cross-section. As in the first embodiment, the lower wooden beam member 31L and the reinforced concrete beam member 32 are connected by using a drift pin 36 on the lower surface of the web portion 32a of the reinforced concrete beam member 32 and by bonding the entire surface with an adhesive. has been done. The method of installing the drift pin 36 and the like used and the specifications of each material are the same as the configuration of the first embodiment.

In this embodiment, the upper surface of the reinforced concrete beam member 32 and the lower surface of the upper wooden beam member 31U are integrally joined by lag screw bolt joining and full-surface bonding with an adhesive, as shown in FIGS. 7 and 8. The structure of the lag screw bolt 37 and the structure of the adhesive are the same as those of the first embodiment.

As shown in FIGS. 7 and 8, the composite structural beam 30 is constructed by integrating the reinforced concrete beam member 32 with a T-shaped cross section and the wooden beam members 31U and 31L with rectangular and groove cross sections as described above. During factory manufacturing, the wooden beam members 31 (31U, 31L) are placed above and below the reinforced concrete beam member 32 and are integrally joined, so that the reinforced concrete beam member 32 bears sufficient stress, so that it can withstand the applied load. This is a precast beam member with a beam length of 9 m (for example, see FIG. 2) that exhibits mechanical behavior in an integrated manner.

[Fourth embodiment]
FIG. 9 shows a fourth embodiment of the present invention in which structural laminated timber is used as the wooden beam member 41 and a precast concrete beam member with a T-shaped cross section is used as the reinforced concrete beam member 42. The cross-sectional shape of an example of a composite structural beam 40 in which a steel plate insertion drift pin connection is adopted for connection with the beam 40 is shown. As shown in FIGS. 9 and 10, this composite structural beam 40 has a slit 44 of a predetermined width along the joint surface of the structural laminated timber 43 joined laterally, as in the second embodiment, The reinforced concrete beam member 42 and the wooden beam member 41 are integrally joined by inserting a joining steel plate 45, which is partially buried in the reinforced concrete beam member 42 in advance, and driving a large number of drift pins 46 from the side of the wooden beam member 41. We are trying to The cross section of the composite structural beam 40 is a composite structural beam in which wooden beam members 41 (41U, 41L) with different cross-sectional shapes are joined above and below a reinforced concrete beam member 42 that is a T-shaped cross-sectional beam similar to the third embodiment. It is 40. The components of the wooden beam member 41 and the reinforced concrete beam member 42 of the composite structural beam 40 of this embodiment, and the structure of the steel plate insertion drift pin joining method are the same as those of the first embodiment and the third embodiment.

[Modification of the fourth embodiment]
In the fourth embodiment in which a T-shaped cross-sectional beam is used as the reinforced concrete beam member 42, there is a modification in which a beam through hole 47 is installed that penetrates the web portion 42a, and the reinforced concrete beam member 42 is constructed with cast-in-place concrete. A modified example will be described with reference to FIGS. 11 to 13.
(Beam through hole installation)
FIG. 11 shows a modified example of a composite structural beam 40 in which a beam through hole 47 is provided on the lower side of a web portion 42a of a reinforced concrete beam member 42. When providing the beam through hole 47 in the composite structural beam 40 of the present invention, as shown in the figure, a void pipe or the like (not shown) is used in the web portion 42a of the reinforced concrete beam member 42 manufactured in advance as precast concrete. By forming a temporary through hole in advance and forming an opening 48 with the same diameter or a larger diameter as the temporary through hole at a predetermined position on the side surface of the lower wooden beam member 41L, each member can be joined. When constructing the composite structural beam 40, a beam through hole 47 of a predetermined diameter can be formed in the web portion 42a. At this time, since the outer surface of the beam is a wooden member, work such as closing around the opening after piping installation can be easily performed.

(Construction using cast-in-place reinforced concrete)
In the present invention, the reinforced concrete beam member 42 of the composite structural beam 40 is assumed to be a precast concrete member manufactured in a factory, but it is also possible to manufacture the reinforced concrete beam member 42 by pouring concrete on site at the construction site of the structure. is also possible. The construction method in that case will be explained with reference to FIGS. 12 and 13.

FIG. 12 is a sectional view showing an example of the pre-concrete pouring process when manufacturing the reinforced concrete beam member 42 using cast-in-place concrete, using imaginary lines. As shown in the figure, when manufacturing the reinforced concrete beam member 42 with cast-in-place concrete, a space V corresponding to the web portion 42a (FIG. 11) of the T-shaped cross-sectional beam is formed in the lower wooden beam member 41L. , a part of the lower wooden beam member 41L becomes the formwork M1 when concrete is poured into the web portion 42a. Necessary reinforcing bars such as beam main reinforcements are arranged within this formwork M1. Furthermore, a formwork M2 for an overhanging flange portion is attached to the upper end position of the lower wooden beam member 41L, and a state in which it is supported by a support S is shown in phantom lines. On the other hand, a tapered surface 41a that slopes downward toward the center in the beam width direction is formed on the lower surface of the upper wooden beam member 41U. By providing this tapered surface 41a, during concrete pouring, flowing concrete is reliably filled into the lower surface of the upper wooden beam member 41U so that air does not accumulate, which would become voids after the concrete hardens. .

FIG. 13 shows an example of construction in which a reinforced concrete beam member 42 similar to that shown in FIG. 12 is manufactured using cast-in-place concrete, and a through-hole 47 under the beam is formed at the same time. As shown in the figure, a void pipe 49 of a predetermined diameter is installed in the installation portion of the under-beam through-hole 47, and an opening 48 is also provided on the side of the wooden beam member 41 at a position communicating with the under-beam through-hole 47. It is provided. This opening 48 is closed with a removable plug P or the like during concrete pouring to prevent concrete from flowing out.

[Fifth embodiment]
FIG. 14 shows a cross-sectional configuration of a column member (hereinafter referred to as column member 50) as a vertical support member 50 as a fifth embodiment of the wooden member concrete member composite structure of the present invention. FIG. 15 shows an example of a rigid-frame frame consisting of column members 50 as vertical support members and horizontal members 20 (as an example). The cross section of the column member 50 of this embodiment has a substantially square cross-sectional shape, and as shown in the figure, the width of the reinforced concrete portion 52 at the center of the cross section is 150 mm, and the width of the wooden portions 51 on both sides of the reinforced concrete portion 52 is 150 mm. Each column is 275mm long, and the column width on each side is 700mm (275+150+275). The reinforced concrete part 52 and the wooden part 51 are integrally joined by anchor bolt joints using five anchor bolts 53 arranged on the joint surfaces and full-surface adhesion using an adhesive. The anchor bolt 53 is directly buried in concrete in the reinforced concrete portion 51, and is fixedly held in the wooden portion 52 by an epoxy resin adhesive 54 filled in the anchor hole. By adding the reinforced concrete portion 52 to the wooden portion 51 in the cross section of the column in this manner, the compressive strength of the column can be significantly increased. For the wooden portion 51 of the column member 50, various types of wooden materials having suitable strength and yield strength can be used, in addition to the structural laminated wood used for the horizontal members described above.

[Sixth embodiment]
Each figure in FIG. 16 shows a sixth embodiment of the wood-concrete member composite structure of the present invention, in which structural laminated timber is used for the wood part 61 and precast reinforced concrete part 62 is used for the reinforced concrete part 62, as in the fifth embodiment. FIG. 3 is a cross-sectional view showing the cross-sectional shape of a vertical support member (synthetic structure column 60) in which a steel plate insertion drift pin connection is adopted for joining a wooden part 61 and a reinforced concrete part 62. In this composite structural column 60, a joining steel plate 65 is partially embedded and supported in a reinforced concrete portion 62 in advance in a slit 64 of a predetermined width provided along the joining surface of structural laminated timber joined laterally. The reinforced concrete portion 62 and the wooden portion 61 are integrally joined by inserting a large number of drift pins 66 into the side surface of the wooden portion 61. The composite structure of the wooden part 61 and the reinforced concrete part 62, which are integrated by adopting this steel plate insertion drift pin joint, has the mechanical effect of improving the column's bearing capacity, as well as the design effect of improving the visibility of the side of the column. You can also expect great effects.

In addition, as a modification of the sixth embodiment, two steel plates 65, 65 are inserted into the cross section of the column, and a large number of drift pins 66 are inserted into the side surface of the wooden portion 61 so as to penetrate these two steel plates 65, 65. The reinforced concrete portion 62 and the wooden portion 61 are integrally joined by pouring from the ground. By using the two steel plates 65, 65, the reinforced concrete portion 62 and the wooden portion 61 can be further integrated.

[Example of configuration of rigid frame using synthetic structure]
In the above description, the composite structure of the present invention is applied to horizontal members (beams) and vertical support members (columns), for example, with reference to FIGS. 2 and 15. In either case, the column-beam joint is a part where the reinforced concrete part of the beam and the reinforced concrete part of the column, and the wooden part of the beam and the reinforced concrete part of the beam, are joined three-dimensionally orthogonally to each other. In order to avoid complicating the arrangement of structural elements (reinforcing bars, shear transmission members, etc.) at each location where these members are joined, and to improve the strength of the vertical support members (columns), the structure shown in Figure 17 was It is also preferable to use a rigid frame structure. For example, as shown in Fig. 17(a), the column-beam joint 70, which is the intersection of a beam member made of a composite structure and a column member, is integrally constructed with a reinforced concrete structure, making it easy to construct the column-beam joint. At the same time, the stress transmission path between the main reinforcements arranged in the beams and columns can be simplified. In the rigid-frame frame shown in FIG. 17(b), the entire column member is made of a reinforced concrete column 71, thereby achieving an improvement in column resistance.

In the above explanation, a beam member was assumed as an example of a horizontal member, but a rigid floor structure can be easily constructed by treating a reinforced concrete member as a part of a slab structure. Further, by locating the wooden member provided above the reinforced concrete member in the lower space of a double floor or the like to accommodate the room, a flat floor surface can be constructed. Furthermore, if a composite structure is used for the outer frame, it is possible to create a design that is integrated with indoor fixtures such as chairs by exposing the wooden parts on the floor indoors. It provides an interior space with a relaxed atmosphere.

In addition, we have explained a composite structure consisting of wooden members and reinforced concrete members, but we have also explained fiber-reinforced concrete members using various reinforcing fibers instead of reinforced concrete members, steel-framed reinforced concrete members, prestressed concrete members made by wiring prestressed steel members, and wood-based members. A similar configuration is also possible for a composite structure consisting of members.

Note that the present invention is not limited to the embodiments described above, and various changes can be made within the scope of each claim. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included within the technical scope of the present invention.

10, 20, 30, 40, 50 Composite structural beam (horizontal material)
11, 21, 31, 41, 51 Wooden beam members 12, 22, 32, 42, 52 Reinforced concrete beam members 25, 45, 65 Joining steel plates 16, 26, 36, 46, 66 Drift pins 17, 37 Lag screw bolts 60 Composite structural column (vertical support member)
61 Wooden part 62 Reinforced concrete part

Claims (7)

A composite structure in which a steel-reinforced concrete member is sandwiched and integrated with a wood member made of laminated laminated wood, and the composite cross section is capable of integrally deforming in response to external forces acting on the composite structural member. A wood member concrete member composite structure characterized by having. 2. The wood-concrete member composite structure according to claim 1, wherein a plurality of shear force transmission means are provided between the concrete member and the wood member along the longitudinal direction of the member. 3. The wood-concrete member composite structure according to claim 2, wherein the shear force transmission means comprises a steel plate inserted into the wood member and the concrete member, and a drift pin that fixes and holds the steel plate. 3. The wood-concrete member composite structure according to claim 2, wherein said shear force transmission means comprises a lag screw bolt arranged to connect said wood member and said concrete member. The wood-concrete-member composite structure according to claim 1, wherein the concrete member and the wood member are integrated by surface adhesion. The wood-concrete composite structure according to claim 1, wherein the composite structure is manufactured in a member shape that can be applied to horizontal members or vertical support members of a structure. The wood-concrete-member composite structure according to claim 1, wherein the concrete member is a reinforced concrete member, and the wood member is a structural laminated timber.

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