JP2019019504A - Flat slab structure - Google Patents

Abstract

To enlarge a support span of a woody plate.SOLUTION: A flat slab structure 10 includes a capital 150 provided on a column head part 80A of a lower column 50A of a column 50, and a woody plate 120 supported by a corner part 122. A slab 100 is a composite slab in which a concrete plate 110 is bonded to an upper surface 120A of the wood plate 120.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flat slab structure.

  Patent Document 1 discloses a building member (ceiling member, floor member, wall member) configured by bonding a concrete layer or a mortar layer and a wood layer with an adhesive.

  Patent Document 2 discloses a composite floor structure formed by placing concrete on a decorative plate in a state where a wooden decorative plate is disposed as a bottom plate of a floor concrete slab placing area.

JP-T-2002-511910 JP2013-083104A

  In the case of a non-beam structure using a wooden plate such as a cross laminated board (CLT), it is handled as a simple support supported by a column or the like in a general support method. For this reason, the support span is determined by the stress or deflection acting on the center of the wood plate. Therefore, there is a limit to increasing the support span of the wood version, and there is room for improvement.

  In view of the above facts, the present invention has an object to increase the support span of the wood plate.

  Invention of Claim 1 is a flat slab structure provided with the capital provided in the pillar head of the pillar, and the wooden board by which the edge part was supported by the said capital.

  In the first aspect of the present invention, the degree of fixation of the end portion of the wooden plate is increased by providing the capital at the column head. By increasing the degree of fixation, the amount of stress and deflection generated at the center of the wood plate is reduced, and as a result, the support span of the wood plate can be increased.

  The invention according to claim 2 is the flat slab structure according to claim 1, wherein the capital is made of a wood material.

  In invention of Claim 2, it becomes possible to make the whole ceiling surface into a wooden material by comprising a capital with a wooden material, and the design property improves.

  According to a third aspect of the present invention, the pillar is made of a wood material, and the upper pillar is provided on the pillar head of the lower pillar, and is a support member that protrudes above the wood plate and the capital. It is the flat slab structure of Claim 1 or Claim 2 currently supported by.

  In invention of Claim 3, it becomes possible to make a ceiling surface and a pillar into a wooden material by comprising a pillar with a wooden material, and the design property improves.

  According to the present invention, the support span of the wood plate can be increased.

It is a longitudinal cross-sectional view along the X direction of the flat slab structure of one Embodiment of this invention. It is the top view which looked up the slab of FIG. 1 from the downward direction. (A) is a perspective view of the capital, (B) is a plan view of the divided capital, and (C) is a plan view of the divided capital. It is a longitudinal cross-sectional view corresponding to FIG. 1 of the flat slab structure of a 1st modification. It is the top view corresponding to Drawing 2 which looked up the slab of the flat slab structure of the 2nd modification from the lower part. It is a perspective view which shows the fireproof laminated material which comprises a wooden pillar in a partial cross section.

<Embodiment>

  A flat slab structure according to an embodiment of the present invention will be described. In each figure, the vertical direction is indicated by an arrow Z, and two orthogonal directions in the horizontal direction are indicated by an arrow X and an arrow Y.

(Construction)
The structure of the building 12 to which the flat slab structure 10 according to the present embodiment is applied will be described.

  A slab 100 that divides the upper and lower floors in the building 12 of this embodiment shown in FIG. 1 is a flat slab structure 10 having a beamless structure in which beams protruding from the lower surface are not provided.

  As shown in FIG. 2, a plurality of wooden pillars 50 are provided inside the building 12 at intervals in the X direction and the Y direction.

  As shown in FIG. 1, the wooden column 50 is divided into a lower column 50A and an upper column 50B, and a slab 100 and a capital 150 described later are passed between the lower column 50A and the upper column 50B. It has a structure. In addition, the woody pillar 50 (lower pillar 50A and upper pillar 50B (refer FIG. 1)) of this embodiment is comprised with the fireproof laminated material.

  Here, an example of the refractory laminated material constituting the wooden pillar 50 (the lower pillar 50A and the upper pillar 50B (see FIG. 1)) of this embodiment will be described with reference to FIG.

  A column 50 made of the fireproof laminated material of the present embodiment shown in FIG. 6 includes a load support portion (core material portion) 52 that supports a load, and a fireproof coating layer 70 provided around the load support portion 52. Have. The refractory coating layer 70 includes a fuel stop layer 54 in which a mortar bar 60 is embedded and a fuel surcharge layer 56. In addition, the mortar bar 60 as an example of the flame-retardant member may be formed of a material other than mortar, for example, a material having a flame-retardant function such as gypsum.

  The load support portion 52 is provided at the center portion of the column 50, the fuel stop layer 54 is provided outside the load support portion 52 so as to surround the load support portion 52, and the fuel allowance layer 56 is provided outside the fuel stop layer 54. It is provided so as to surround the stop layer 54.

  And, in the event of a fire, the pillar 50 composed of such a three-layered fire-resistant laminated material exhibits a heat insulation effect by burning the outer fuel allowance layer 56 and carbonizing it into a carbonized layer, and also providing a flame stop. The mortar bar 60 constituting the layer 54 stops combustion while absorbing heat, so that the load support portion 52 that supports the load at the center is protected from fire.

  As shown in FIG. 1, a support member 200 is provided on a column head 80A of the lower column 50A. In the present embodiment, the support member 200 protrudes upward from the slab 100 and supports the upper column 50B. The support member 200 includes a lower base plate 210, an upper base plate 212, and columnar column portions 220 that connect the upper and lower base plates 210, 212. The lower base plate 210 is joined to the column head 80A of the lower column 50A with a bolt or the like (not shown), and the upper base plate 212 is joined to the lower end portion 82B of the upper column 50B with a bolt or the like (not shown). The part 220 penetrates the slab 100 and the capital 150. In addition, the support part 200 may not protrude above the slab 100, and the upper end of the support member 220 may be flush with the upper surface of the slab 100.

  The capital 150 is joined and supported by the column head 80A of the lower column 50A of each column 50 (see also FIG. 2). In the present embodiment, more precisely, it is joined and supported on the lower base plate 210 of the support member 200 joined to the column head 80A of the lower column 50A. The slab 100 is supported by the capital 150.

  As shown in FIG. 2, the capital 150 of the present embodiment has a square shape in plan view, and is a 2WAY capital.

  As shown in FIGS. 3 (A) and 3 (B), a through hole 160 is formed in the center portion of the capital 150, and a support column portion 220 (see FIG. 1) of the support member 200 is inserted into the through hole 160. doing.

  As shown in FIGS. 3B and 3C, the capital 150 according to the present embodiment is configured by joining two divided plates 152 each having a semicircular recess 162 in plan view formed on an end surface 152A. Has been. Then, the concave portion 162 of the dividing plate 152 is fitted into the column portion 220 (see FIG. 1) of the support member 200, and the end surfaces 152A are joined to each other, so that the concave portion 162 is connected to the capital 150 and the column portion 220 (see FIG. 1). Through hole 160 is formed.

  As shown in FIG. 1, the slab 100 is a synthetic slab composed of a plurality of wooden plates 120 and a concrete plate 110 joined to the upper surface 120 </ b> A of the wooden plate 120.

  In the concrete plate 110, main bars and distribution bars (not shown) are arranged in a lattice pattern in plan view. The concrete plate 110 may be placed on the wood plate 120 on site, or a precast plate manufactured at a factory or on site may be joined with an adhesive or the like.

  As shown in FIGS. 1 and 2, each wood plate 120 has a corner 122 supported by a capital 150.

  As shown in FIG. 1, the wood plate 120 of the present embodiment is made of cross laminated timber (CLT). The orthogonal laminated material constituting the wood plate 120 is a panel material in which a plurality of layers in which laminaes (grind boards) 124 are arranged are stacked and bonded so that the fiber directions of the wood fibers 126 of the lamina 124 are orthogonal to each other.

  In addition, the capital 150 of this embodiment is also comprised by the orthogonal laminated material (CLT, Cross Laminated Timber). In this embodiment, the wood plate 120 and the capital 150 have a five-layer structure in which five layers of lamina 124 are laminated, but the present invention is not limited to this. Each may be 4 layers or less or 6 layers or more. Further, the wood plate 120 and the capital 150 may have different layer structures, for example, the wood plate 120 may have a five-layer structure and the capital 150 may have a three-layer structure.

  In the present embodiment, the wood plate 120 constituting the slab 100 is joined to the capital 150 by an adhesive, but is not limited thereto. It may be joined by joining means other than the adhesive, for example, screws. Moreover, the wood plate 120 and the capital 150 do not need to be joined.

  In this embodiment, the lower surface 100A of the slab 100 (wood plate 120), the lower surface 150A of the capital 150, and the side surface 150B (see also FIG. 3A) are covered with the transparent fireproof film 90. It does not have to be.

<Action and effect>
Next, the operation and effect of this embodiment will be described.

  Since the slab 100 of this embodiment is a synthetic slab in which the concrete plate 110 is provided on the upper surface 120A of the wood plate 120, the slab 100 is lighter than a slab made of only reinforced concrete and is made of only a wood plate. Fireproof performance and soundproof performance are improved compared to slabs.

  Further, a 2WAY capital 150 is provided on the column head 80A of the lower column 50A of the column 50, and the corner 122 of the wood plate 120 constituting the slab 100 is supported by the capital 150. Therefore, the degree of fixation of the corner 122 of the wood plate 120 is increased. By increasing the degree of fixation of the corner portion 122, the stress and the amount of deflection generated at the center of the wood plate 120 are reduced. As a result, the support span of the wood plate 120 can be increased. And since the support span of the wood plate 120 becomes large, the space | interval of the pillar 50 in a non-beam structure becomes wide, and large space is realizable.

  In addition, when the wood plate 120 and the capital 150 constituting the slab 100 are joined together by an adhesive as in the present embodiment, and they behave integrally, the corner 122 (end) is substantially formed. The cross-sectional beam formation is increased, and the bending strength and shear strength of the corner portion 122 (end portion) are improved.

  In addition, by configuring the capital 150 with a wood material (in this embodiment, an orthogonally laminated material), the entire ceiling surface composed of the slab 100 and the capital can be made wood, and the design is improved.

  Furthermore, in this embodiment, it becomes possible to make the whole ceiling surface and the pillar 50 into a wooden material by comprising the pillar 50 with a wooden material (in this embodiment, fireproof laminated material), and the design property further improves.

<Modification>
Next, a modification of this embodiment will be described.

[First modification]
A first modification will be described.

  In the first modification shown in FIG. 4, a bonding layer 170 is provided between the wood plate 120 of the slab 100 and the capital 150. In the case where the capital 150 is configured by bonding a plurality of divided plates 152 as in the above-described embodiment by providing the bonding layer 170 between the wood plate 120 and the capital 150 and bonding the plurality of divided plates 152. And the plurality of wooden plates 120 are integrated, and the fixing degree of the wooden plates 120 is improved.

  As the bonding layer 170, fillers such as mortar, concrete, and grout, iron plates, and the like can be used.

[Second modification]
A second modification will be described.

  In the second modified example shown in FIG. 5, the capital 250 is a 1 WAY capital along the Y direction. The capital 250 is stretched over and joined to a column head 80A (see FIG. 1) of the lower column 50A of the column 50. An end portion 128 in the X direction of the wood plate 120 constituting the slab 100 is stretched over and supported by the capital 250.

  In addition, although illustration is abbreviate | omitted, the capital 250 of this modification is also the structure which joined and integrated the some division | segmentation board.

<Others>
In addition, this invention is not limited to the said embodiment and modification.

  For example, in the above-described embodiment and modification, the wood plate 120 is made of orthogonally laminated wood, but is not limited thereto. For example, it may be a single plate laminated material (LVL (Laminated Veneer Number)) in which the fiber directions of the single plate are aligned and bonded, or a solid material.

  Further, for example, in the above-described embodiment and modification, the capitals 150 and 250 are made of orthogonal laminated material, but are not limited thereto. For example, it may be a single plate laminated material (LVL (Laminated Veneer Number)) in which the fiber directions of the single plate are aligned and bonded, or a solid material. Furthermore, you may be comprised with materials other than a wooden material. For example, you may be comprised with the reinforced concrete. In the case of reinforced concrete, it may be precast concrete.

  Further, for example, in the above-described embodiment and modification, the capitals 150 and 250 have a structure in which a plurality of divided plates are joined and integrated, but the present invention is not limited to this. The capitals 150 and 250 may have a structure that is not divided. In this case, the support member 200 may be divided into upper and lower parts, inserted into the insertion hole, joined, and integrated.

  Moreover, in the said implementation type | system | group, although the slab 100 was the synthetic | combination slab which joined the concrete plate 110 on the wooden board | plate 120, it is not limited to this. The slab may be composed only of the wood plate 120.

  Moreover, in the said embodiment, although the pillar 50 was comprised with the fireproof laminated material, it is not limited to this. You may be comprised with woody materials other than a fireproof laminated material. Further, other than wood, for example, steel frames or reinforced concrete may be used.

  Furthermore, the present invention can be implemented in various modes without departing from the gist of the present invention.

10 Flat slab structure 50 Column 80A Column head 100 Slab 120 Wood plate 122 Corner (an example of an end)
128 end 150 capital 200 support member 250 capital

Claims (3)

Capital provided at the head of the pillar,
A wooden version whose ends are supported by the capital;
Flat slab structure with The capital is made of a wood material,
The flat slab structure according to claim 1. The pillar is made of a wood material,
The upper column is provided at the column head of the lower column, and is supported by a support member that protrudes above the wood plate and the capital,
The flat slab structure according to claim 1 or 2.