RC wall structure

Abstract

To provide a RC wall structure that enhances deformation performance of a RC (reinforced concrete) column-beam frame during earthquakes, suppresses damage to RC walls, and efficiently resists vertical loads on the RC walls and out-of-plane loads during earthquakes.SOLUTION: A RC (reinforced concrete) wall structure 1 consisting of a RC column-beam frame 2 and a RC structural plane 3, comprises a column 21 and a beam 22 constituting the RC column-beam frame 2, and a RC wall 30 forming the RC structural plane 3. Horizontal slits 42A, 42B are formed at a boundary between the beams 22 and the RC wall 30. Vertical slits 41A, 41B are formed at a boundary between the column 21 and the RC wall 30. The horizontal slits 42A, 42B and the vertical slits 41A, 41B are provided around an entire perimeter of the RC walls 30. The RC wall 30, the column 21, and the beam 22 are connected by a connecting material 50 provided across the horizontal slits 42A, 42B, and the vertical slits 41A, 41B.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an RC wall structure consisting of an RC column-beam frame and an RC structural panel. [Background technology]

[0002] In buildings made of reinforced concrete (hereafter referred to as RC), in order to improve deformation performance during an earthquake, slits are sometimes provided between the RC column-beam structure that forms the building and the RC walls that are installed within the RC column-beam structure and form the RC structural surface. For example, Patent Document 1 discloses an earthquake-resistant slit material consisting of a plate-shaped slit material body and a support member with a groove extending on both sides of the bottom plate, with the groove on one side of the support member fitted into at least one of both ends of the slit material body. In this earthquake-resistant slit material, a part is fixed to the slit material body or the support member, and a part not fixed to the slit material body or the support member is provided as a string-like body that penetrates the wall formwork and protrudes outward from the wall formwork when the earthquake-resistant slit material is installed between the wall formwork. The earthquake-resistant slit material in Patent Document 1 is a vertical slit formed at the boundary between a column and a nonstructural wall connected to it.

[0003] In a structure such as that of Patent Document 1, horizontal slits may be provided in order to improve deformation performance during an earthquake. For example, Patent Document 2 discloses a configuration in which vertical slit members are provided between an exterior wall, which is a non-structural wall, and a column, and horizontal slit members are provided between the exterior wall and a beam on the lower floor. Furthermore, Patent Document 3 discloses a configuration in which vertical slits are formed between two pillars and the wall, and a horizontal slit is formed between the wall and the floor slab of the lower floor, thereby eliminating the constraint between the wall and the pillars.

[0004] In Patent Documents 2 and 3, slits are provided on three sides of the wall, on both sides and below. In such a configuration, since there is no slit between the wall and the upper beam, twisting or stress concentration occurs in this area, and the wall may be damaged. In response to this, it is possible to provide a slit between the wall and the upper beam, but in this case, it is not easy to resist the vertical load on the wall or the out-of-plane load acting on the wall during an earthquake. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-71208 A [Patent Document 2] JP 2011-32862 A [Patent Document 3] Patent Publication No. 2021-32050 Summary of the Invention [Problem to be solved by the invention]

[0006] The problem that the present invention aims to solve is to provide an RC wall structure that can suppress damage to RC walls while improving the deformation performance of RC column-beam structures during earthquakes, and can efficiently resist vertical loads on the RC walls and out-of-plane loads during earthquakes. [Means for solving the problem]

[0007] The inventors discovered that in an RC wall structure consisting of an RC column-beam frame and an RC structural surface, it is possible to prevent damage to the RC wall while maintaining the structural integrity of the entire RC wall structure by forming horizontal slits at the joints between the beams and the RC wall, and vertical slits at the joints between the columns and the RC wall, and thus arrived at the present invention. In order to solve the above problems, the present invention employs the following means. In other words, the RC wall structure of the present invention is an RC wall structure consisting of an RC column-beam structure and an RC structural surface, and is equipped with columns and beams that constitute the RC column-beam structure and RC walls that form the RC structural surface, wherein a horizontal slit is formed at the boundary between the beam and the RC wall, and a vertical slit is formed at the boundary between the column and the RC wall, the horizontal slit and the vertical slit are provided around the entire circumference of the RC wall, and the RC wall, the columns, and the beams are connected by connecting materials that are provided across the horizontal slits and the vertical slits. According to the above-mentioned configuration, horizontal and vertical slits are provided around the entire circumference of the RC wall between the columns and beams that make up the RC (reinforced concrete) column-beam frame and the RC wall that forms the RC structural surface. In this way, the RC wall and the columns and beams are separated by horizontal and vertical slits around the entire circumference of the RC wall, so that the RC wall is prevented from restricting the deformation of the RC column-beam frame during an earthquake. Therefore, the ductility of the RC column-beam frame can be improved, and the deformation performance can be enhanced. In addition, the RC walls are separated from the columns and beams by horizontal and vertical slits all around the RC walls. Therefore, even if the RC column-beam structure deforms during an earthquake, the deformation is prevented from reaching the RC walls all around the RC walls. Therefore, damage to the RC walls during an earthquake can be efficiently prevented. Furthermore, the RC walls are connected to the columns and beams with connectors that span the horizontal and vertical slits. These connectors support the vertical load of the RC walls. Even if an out-of-plane load acts on the RC walls during an earthquake, these connectors are able to resist this. As a result, it is possible to provide an RC wall structure that can improve the deformation performance of the RC column-beam structure during an earthquake while suppressing damage to the RC wall, and can efficiently resist vertical loads on the RC wall and out-of-plane loads during an earthquake.

[0008] In one aspect of the present invention, the connecting material connecting the beam below the RC wall to the underside of the RC wall extends vertically and includes either or both of a lower steel rod whose ends are embedded in the lower beam and the RC wall, and a sliding support that supports the RC wall so that the RC wall can move horizontally relative to the lower beam. According to this configuration, when a lower steel bar is provided as a connecting member connecting the lower beam and the underside of the RC wall, extending vertically and having its ends embedded in the lower beam and the RC wall, the lower steel bar is provided between the lower beam and the RC wall so as to straddle the horizontal slit. This lower steel bar restrains the movement of the RC wall in the out-of-plane direction. In addition, since the rigidity of the steel bar is smaller than that of the columns and beams, when the RC column-beam frame tries to deform during an earthquake, the RC wall and the lower steel bar do not restrain this deformation significantly. Therefore, even if the RC wall and the lower beam are connected by the lower steel bar, the deformation performance of the RC column-beam frame is not significantly impaired. In addition, if a sliding support is provided as a connecting member connecting the lower beam to the underside of the RC wall so that the RC wall can move horizontally relative to the lower beam, the sliding support can transmit the load of the RC wall to the lower beam. Furthermore, as mentioned above, if the RC wall tries to move relative to the lower beam as a result of the RC column-beam structure deforming during an earthquake, the sliding support allows this relative movement, and prevents the RC wall from restricting the deformation of the RC column-beam structure. In this way, a structure can be realized that supports the RC walls while preventing the RC walls from impairing the deformation of the RC beam-column structure, and that can efficiently resist the vertical load on the RC walls and the out-of-plane loads during earthquakes.

[0009] In one aspect of the present invention, the connecting material connecting the column and the RC wall comprises a column connecting member that is arranged across the vertical slit and includes a plate member joined to each of the column and the RC wall. According to this configuration, the plate member can bear the out-of-plane stress of the RC wall.

[0010] In one aspect of the present invention, a finishing material is attached to the surface of the RC wall. According to this configuration, by providing an RC structural surface with RC walls that have horizontal and vertical slits around the entire circumference, even if the RC column-beam structure deforms during an earthquake, this deformation is prevented from reaching the RC walls, and damage to the RC walls is suppressed. Therefore, in the case where a finishing material is attached to the RC wall, damage to the finishing material is also suppressed. Effect of the Invention

[0011] According to the present invention, it is possible to provide an RC wall structure that can suppress damage to the RC wall while improving the deformation performance of the RC beam-column frame during an earthquake. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a front view showing the configuration of an RC wall structure according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an enlarged view of a portion viewed from an arrow A in FIG. [Diagram 3] 3 is a diagram showing the configuration of a vertical slit, and is a cross-sectional view of the portion viewed from the arrow II in FIG. 2. [Figure 4] FIG. 2 is a cross-sectional view of the portion viewed from the arrows II-II in FIG. 2, showing the configuration of a horizontal slit provided between the RC structural face and the lower beam. [Diagram 5] FIG. 3 is a diagram showing the configuration of a horizontal slit provided between the RC structural face and the upper beam, and is a cross-sectional view taken along the line III-III in FIG. 2. [Figure 6] FIG. 11 is a front view showing an RC wall structure according to a first modified example of the embodiment. [Figure 7] 7 is a diagram showing the configuration of a sliding support body provided as a connecting member, and is a cross-sectional view taken along the line IV-IV in FIG. 6. [Figure 8] 8 is a cross-sectional view taken along the line VV in FIG. 7. [Figure 9] 8 is a cross-sectional view taken along the line VI-VI in FIG. 7. [Figure 10] FIG. 11 is a front view showing an RC wall structure according to a second modified example of the embodiment. [Figure 11] 11 is a diagram showing the configuration of a column joint member provided as a connecting material, and is a cross-sectional view taken along the line VII-VII in FIG. 10. [Figure 12] 8 is a cross-sectional view taken along the line VIII-VIII in FIG. [Figure 13] 12 is a cross-sectional view taken along the line IX-IX in FIG. 11 . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The present invention is an RC wall structure consisting of an RC column-beam frame and an RC structural surface. Specifically, by providing connectors (vertical slits and horizontal slits) around the entire periphery of the joint between the columns and beams that form the RC column-beam frame and the RC wall that forms the RC structural surface, an RC wall structure consisting of the RC column-beam frame and the RC structural surface separated by the connectors is formed. Hereinafter, an embodiment of an RC wall structure according to the present invention will be described with reference to the accompanying drawings. (First embodiment) Fig. 1 shows a front view of the RC wall structure according to the first embodiment of the present invention. Fig. 2 is an enlarged view of the A arrow portion of Fig. 1. Fig. 3 is a cross-sectional view of the II arrow portion of Fig. 2 showing the configuration of a vertical slit. Fig. 4 is a cross-sectional view of the II-II arrow portion of Fig. 2 showing the configuration of a horizontal slit provided between the RC structural surface and a lower beam. Fig. 5 is a cross-sectional view of the III-III arrow portion of Fig. 2 showing the configuration of a horizontal slit provided between the RC structural surface and an upper beam. 1 and 2, a reinforced concrete (hereinafter, referred to as RC) wall structure 1 includes an RC column-beam structure 2 and an RC structural surface 3. The RC column-beam structure 2 includes columns 21 and beams 22 that constitute the skeleton of a building 100. A plurality of pillars 21 are provided at predetermined intervals in the horizontal direction (the width direction W of the RC wall 30 described later). Each pillar 21 extends in the vertical direction H. As shown in Fig. 3, pillar 21 is made of reinforced concrete and has a concrete portion 21c and a column reinforcing bar 21d embedded in the concrete portion 21c. As shown in Fig. 2, a plurality of beams 22 are provided at predetermined intervals in the up-down direction H between horizontally adjacent columns 21. Each beam 22 extends in the horizontal direction (width direction W) and is joined to two adjacent columns 21. As shown in Figs. 4 and 5, the beams 22 are made of reinforced concrete and have a concrete portion 22c and a beam reinforcing bar 22d embedded in the concrete portion 22c.

[0014] As shown in Fig. 2, the RC structural surface 3 is formed along a surface on which the columns 21 and beams 22 constituting the RC column-beam frame 2 are provided. The RC structural surface 3 is surrounded by two columns 21 adjacent to each other in the horizontal direction (width direction W) and two beams 22 adjacent to each other in the vertical direction H. The RC structural surface 3 is formed to include an RC wall 30. As shown in Figs. 3 to 5, the RC wall 30 is made of reinforced concrete and has a concrete portion 30p and wall reinforcing bars 30q embedded in the concrete portion 30p. In this embodiment, the RC wall structure 1 having such an RC structural surface 3 is provided, for example, on the outer peripheral surface 100f of the building 100. That is, in this embodiment, the RC wall 30 is an exterior wall, and is provided so as to separate the outdoor space S1 from the indoor space S2 in the thickness direction T. The RC wall 30 may be formed by pouring concrete on-site, or may be made of precast concrete.

[0015] At the boundary between the RC wall 30 and the RC column-beam structure 2 that surrounds the RC wall 30, slits 40 are provided around the entire periphery of the RC wall 30 so as to separate and isolate the RC wall 30 from the RC column-beam structure 2. The slit 40 has a pair of vertical slits 41A, 41B and a pair of horizontal slits 42A, 42B.

[0016] The vertical slit 41A is provided between an end 30a on one side in the width direction W of the RC wall 30 (the left side of the paper in FIG. 2) and a column 21A provided on one side in the width direction W of the RC wall 30. The vertical slit 41B is provided between an end 30b on the other side in the width direction W of the RC wall 30 (the right side of the paper in FIG. 2) and a column 21B provided on the other side in the width direction W of the RC wall 30. The vertical slits 41A, 41B are provided over the entire length of the RC wall 30 in the up-down direction H so as to separate and separate the RC wall 30 from the RC column-beam structure 2.

[0017] As shown in FIG. 3, each of the vertical slits 41A and 41B includes a vertical slit material 43, a sealing material 44, and a fireproof material 45A. The vertical slit material 43 is sandwiched between the end surface 30s facing the columns 21A, 21B at the end portions 30a, 30b in the width direction W of the RC wall 30 and the column side surface 21s facing the RC wall 30 at the columns 21A, 21B. The vertical slit material 43 is provided continuously over the entire length of the end portions 30a, 30b of the RC wall 30 in the vertical direction H. The vertical slit material 43 is formed in a plate shape so as to close the gap between the end surface 30s and the column side surface 21s. The vertical slit material 43 is formed, for example, from a calcium silicate board, a calcium carbonate foam material, a foamed polymer material such as foamed polyethylene, or the like. The vertical slit material 43 may be formed from wood. The vertical slit material 43 is provided in pairs. The pair of vertical slit members 43 are provided spaced apart from each other so as to sandwich a fireproof material 45A, which will be described later, on the outdoor S1 side and the indoor S2 side, respectively.

[0018] The sealing materials 44 are provided as a pair. One sealing material 44 is provided on the further outdoor S1 side of the vertical slit material 43 provided on the outdoor S1 side so as to cover the entire surface of the vertical slit material 43 from the outdoor S1 side. One sealing material 44 is provided so as to close the gap between the finishing material 35 provided so as to cover the RC wall 30 from the outdoor S1 side and the frame finishing material 25 provided so as to cover the columns 21A, 21B from the outdoor S1 side. The other sealing material 44 is provided on the further indoor S2 side of the vertical slit material 43 provided on the indoor S2 side so as to cover the entire surface of the vertical slit material 43 from the indoor S2 side. The other sealing material 44 is provided so as to close the gap between the end face 30s of the RC wall 30 and the column side surfaces 21s of the columns 21A and 21B. The sealing material 44 is made of, for example, a rubber-based material. The fireproof material 45A is provided between the pair of vertical slit materials 43, extends over the entirety in the up-down direction H, and is provided so as to separate the pair of vertical slit materials 43 from each other. The fireproof material 45A is, for example, rock wool.

[0019] As shown in Fig. 2 and Fig. 4, the horizontal slit 42A, which is located below the RC wall 30, is provided between the lower end 30c of the RC wall 30 and the beam 22A provided below the RC wall 30. As shown in Fig. 4, the beam 22A provided below the RC wall 30 has an additional section 24. The additional section 24 is provided integrally with the beam 22A on the upper side of the outdoor S1 side of the beam 22A so as to protrude upward from the upper surface 22t of the beam 22A on the indoor S2 side. The additional section 24 extends in the vertical direction H and has a reinforcing bar 24a whose upper part protrudes upward from the upper surface 22t, and a concrete section 24b provided so as to cover the reinforcing bar 24a. The additional pouring section 24 has an indoor side upper surface 241 formed on the indoor S2 side, and an outdoor side upper surface 242 formed on the outdoor S1 side of the indoor side upper surface 241 and at a lower level than the indoor side upper surface 241. The lower end portion 30c of the RC wall 30 has an indoor side lower end surface 301 formed on the indoor side S2 side, and an outdoor side lower end surface 302 formed on the outdoor side S1 side of the indoor side lower end surface 301 and at a lower level than the indoor side lower end surface 301. The horizontal slit 42A is provided between the lower end portion 30c of the RC wall 30 and the lower beam 22A (the additional portion 24 thereof). The horizontal slit 42A is provided over the entire length of the RC wall 30 in the width direction W so as to separate and separate the RC wall 30 from the RC column-beam frame 2.

[0020] The horizontal slit 42A includes a horizontal slit material 46A, a sealing material 47, and a fireproof material 45B. The horizontal slit material 46A is sandwiched between the indoor side upper surface 241 and the outdoor side upper surface 242 of the additional pouring section 24 and the indoor side lower end surface 301 and the outdoor side lower end surface 302 of the RC wall 30. The horizontal slit material 46A is provided continuously over the entire horizontal direction (width direction W) length of the lower end portion 30c of the RC wall 30. The horizontal slit material 46A is provided as a pair. The pair of horizontal slit materials 46A are provided spaced apart from each other so that they are located on the outdoor S1 side and the indoor S2 side, respectively, with a fireproof material 45B described later in between. The horizontal slit member 46A is formed of the same material as the vertical slit member 43.

[0021] The sealant 47 is provided as a pair. One sealant 47 is provided on the outdoor S1 side of the horizontal slit material 46A provided on the outdoor S1 side, so as to cover the entire surface of the horizontal slit material 46A from the outdoor S1 side. One sealant 47 is provided so as to close the gap between the finishing material 35 provided to cover the RC wall 30 from the outdoor S1 side, and the frame finishing material 25 provided to cover the lower beam 22A from the outdoor S1 side. The other sealing material 47 is provided on the further indoor S2 side of the horizontal slit material 46A provided on the indoor S2 side so as to cover the entire surface of the horizontal slit material 46A from the indoor S2 side. The other sealing material 47 is provided so as to close the gap between the indoor side lower end surface 301 of the RC wall 30 and the indoor side upper surface 241 of the additional pouring section 24. The sealant 47 is made of the same material as the sealant 44 in the vertical slits 41A and 41B. The fireproof material 45B is provided between the pair of horizontal slit materials 46A, extends over the entire width direction W, and is provided so as to separate the pair of horizontal slit materials 46A from each other. The fire-resistant material 45B is made of the same material as the fire-resistant material 45A of the vertical slits 41A and 41B.

[0022] As shown in Figures 2 and 5, of the pair of horizontal slits 42A, 42B, the horizontal slit 42B located above the RC wall 30 is provided between the upper end 30d of the RC wall 30 and the beam 22B provided above the RC wall 30. As shown in Figure 5, the beam 22B provided above the RC wall 30 has an additional section 27. The additional section 27 is provided integrally with the beam 22B on the lower side of the outdoor S1 side of the beam 22B so as to protrude downward from the lower surface 22s of the indoor S2 side of the beam 22B. The additional section 27 has an indoor side underside 271 formed on the indoor S2 side, and an outdoor side underside 272 formed on the outdoor S1 side of the indoor side underside 271 and at a lower level than the indoor side underside 271. The upper end portion 30d of the RC wall 30 has an indoor side upper end surface 311 formed on the indoor side S2 side, and an outdoor side upper end surface 312 formed on the outdoor side S1 side relative to the indoor side upper end surface 311 and formed at a lower level than the indoor side upper end surface 311. The horizontal slit 42B is provided between the upper end portion 30d of the RC wall 30 and the upper beam 22B (the additional portion 27 thereof). The horizontal slits 42B are provided over the entire length of the RC wall 30 in the width direction W so as to separate and separate the RC wall 30 from the RC column-beam frame 2.

[0023] The horizontal slit 42B includes a horizontal slit material 46B, a sealing material 48, and a fireproof material 45C. The horizontal slit material 46B is sandwiched between the indoor side lower surface 271 and the outdoor side lower surface 272 of the additional pouring portion 27 and the indoor side upper end surface 311 and the outdoor side upper end surface 312 of the RC wall 30. The horizontal slit material 46B is provided continuously over the entire horizontal direction (width direction W) length of the upper end portion 30d of the RC wall 30. The horizontal slit material 46B is provided as a pair. The pair of horizontal slit materials 46A are provided spaced apart from each other so that they are located on the outdoor S1 side and the indoor S2 side, respectively, sandwiching the fireproof material 45C described later. The horizontal slit member 46B is formed of the same material as the vertical slit member 43.

[0024] The sealants 48 are provided as a pair. One sealant 48 is provided on the outdoor S1 side of the horizontal slit material 46B provided on the outdoor S1 side, so as to cover the entire surface of the horizontal slit material 46B from the outdoor S1 side. One sealant 48 is provided so as to close the gap between the finishing material 35 provided to cover the RC wall 30 from the outdoor S1 side, and the frame finishing material 25 provided to cover the upper beam 22B from the outdoor S1 side. The other sealant 48 is provided on the further indoor S2 side of the horizontal slit material 46B provided on the indoor S2 side so as to cover the entire surface of the horizontal slit material 46B from the indoor S2 side. The other sealant 48 is provided so as to close the gap between the indoor side upper end surface 311 of the RC wall 30 and the indoor side lower surface 271 of the additional pouring section 27. The sealant 48 is made of the same material as the sealant 44 in the vertical slits 41A and 41B. The fireproof material 45C is provided between the pair of horizontal slit materials 46B, extends over the entire width direction W, and is provided so as to separate the pair of horizontal slit materials 46B from each other. The fire-resistant material 45C is made of the same material as the fire-resistant material 45A of the vertical slits 41A and 41B. In this manner, the RC wall 30 is entirely surrounded by the fireproof materials 45A, 45B, 45C which are provided so as to extend entirely in the vertical direction H and the width direction W.

[0025] In this way, the RC wall 30 and the columns 21 and beams 22 are separated (decoupled) by the horizontal slits 42A, 42B and the vertical slits 41A, 41B of the slits 40 provided around the entire periphery of the RC wall 30. This prevents the deformation of the RC column-beam structure 2 from being restricted by the RC wall 30 during an earthquake. In addition, when the RC column-beam structure 2 deforms during an earthquake, this deformation is prevented from reaching the RC wall 30, causing damage to the RC wall 30.

[0026] In this embodiment, the finishing material 35, which is provided to cover the entire surface of the RC wall 30 from the outdoor S1 side, terminates at the end of the RC wall 30 as shown in each of Figures 3 to 5, and is attached to the RC wall 30 so as not to protrude from the RC wall 30 into the areas of the horizontal slits 42A, 42B or the vertical slits 41A, 41B.

[0027] 2, in this embodiment, the RC wall structure 1 includes a connector 50 that is provided across the horizontal slits 42A, 42B and the vertical slits 41A, 41B and connects the RC wall 30 to the column 21 and the beam 22. In this embodiment, the connector 50 includes a hanging bolt 51, a lower steel bar 52, and a side steel bar 53.

[0028] As shown in FIG. 2, a plurality of hanging bolts 51 are provided at intervals on the upper side of the RC wall 30 in the horizontal direction in which the beam 22 extends, i.e., in the width direction W. As the hanging bolts 51, it is preferable to use bolts, reinforcing bars, or steel bars manufactured from general structural rolled steel materials. As shown in FIG. 5, each hanging bolt 51 straddles the horizontal slit 42B and connects and joins the upper end 30d of the RC wall 30 to the upper beam 22B. At the upper end of each hanging bolt 51, a fixing plate 57A sandwiched between a pair of nuts 55A is provided. The upper end of each hanging bolt 51 is embedded in the concrete portion 22c of the upper beam 22B and fixed to the concrete forming the concrete portion 22c. At the lower end of each hanging bolt 51, a fixing plate 57B sandwiched between a pair of nuts 55B is provided. The lower end of each suspension bolt 51 is embedded in the concrete portion 30p of the RC wall 30 and fixed to the concrete that forms the concrete portion 30p. Each suspension bolt 51 is provided so as to penetrate the fireproof material 45C of the horizontal slit 42B.

[0029] As shown in FIG. 2, in this embodiment, a plurality of types of hanging bolts 51 having different lengths are provided. Specifically, the hanging bolts 51 include a first hanging bolt 51A and a second hanging bolt 51B. The first hanging bolt 51A is formed longer than the second hanging bolt 51B. The first hanging bolts 51A and the second hanging bolts 51B are alternately arranged in the width direction W. The first hanging bolts 51A and the second hanging bolts 51B are provided so that their upper ends are at the same height. The first hanging bolts 51A and the second hanging bolts 51B are provided so that their lower ends are at different heights, which suppresses the formation of a fracture interface in the wall along the lower end positions of the hanging bolts 51A and 51B. In this manner, each suspension bolt 51 is provided extending in the vertical direction H, and its ends are embedded in the upper beam 22B and the RC wall 30, respectively. The RC wall 30 is suspended by these multiple hanging bolts 51, thereby supporting the weight of the RC wall 30.

[0030] As shown in FIG. 2, the side steel bars 53 are provided at intervals in the vertical direction (up-down direction) H in which the columns 21A, 21B extend on both ends of the RC wall 30 in the width direction W. In this embodiment, the side steel bars 53 are reinforcing bars. As shown in FIG. 3, each side steel bar 53 straddles the vertical slits 41A, 41B to connect and join the RC wall 30 and the columns 21A, 21B. One end of each side steel bar 53 is embedded in the concrete parts 21c of the columns 21A, 21B and fixed to the concrete forming the concrete part 21c. The other end of each side steel bar 53 is covered with a reinforcing bar curing cover 56B made of, for example, foamed polyethylene, and is embedded in the concrete part 30p of the RC wall 30 while being covered with the reinforcing bar curing cover 56B. This separates the other end of each side steel bar 53 from the concrete that forms the concrete portion 30p. Each side steel bar 53 is provided so as to penetrate the fireproof material 45A of the vertical slits 41A, 41B. In this manner, each side steel bar 53 is provided extending in the width direction W, and its ends are embedded in each of the columns 21A, 21B and the RC wall 30.

[0031] As shown in FIG. 2, a plurality of lower steel bars 52 are provided at intervals on the lower side of the RC wall 30 in the horizontal direction in which the beam 22 extends, i.e., in the width direction W. In this embodiment, the lower steel bars 52 are reinforcing bars. As shown in FIG. 4, each lower steel bar 52 straddles the horizontal slit 42A to connect and join the lower end 30c of the RC wall 30 and the lower beam 22A. The lower end of each lower steel bar 52 is embedded in the concrete part 22c of the lower beam 22A and is fixed to the concrete forming the concrete part 22c. The upper end of each lower steel bar 52 is covered with a reinforcing bar curing cover 56C made of, for example, foamed polyethylene, and is embedded in the concrete part 30p of the RC wall 30 while being covered with the reinforcing bar curing cover 56C. This separates the upper end of each lower steel bar 52 from the concrete forming the concrete part 30p. Each lower steel bar 52 is provided so as to penetrate the fireproof material 45B of the horizontal slit 42A. In this manner, each lower steel bar 52 is provided extending in the vertical direction H, with its ends embedded in each of the lower beams 22A and RC wall 30.

[0032] As described above, the RC wall 30 and the columns 21 and beams 22 are separated by the horizontal slits 42A, 42B and the vertical slits 41A, 41B around the entire circumference of the RC wall 30. Therefore, even if the RC column-beam structure 2 vibrates and deforms during an earthquake, the RC wall is prevented from restricting the deformation of the RC column-beam structure. Furthermore, even if the RC column-beam structure 2 deforms during an earthquake, the deformation is prevented from extending to the RC wall 30 around the entire circumference of the RC wall 30. Therefore, damage to the RC wall 30 during an earthquake can be efficiently prevented. In the above-mentioned configuration, the RC wall 30 is supported by being suspended from the upper beam 22B by the suspension bolts 51 as the connecting members 50 while being separated from the RC column-beam frame 2 by the horizontal slits 42A, 42B and the vertical slits 41A, 41B all around. In this configuration, when an earthquake occurs and the RC column-beam frame 2 vibrates, the RC wall 30 tries to move relative to the RC column-beam frame 2 so as to swing around the part suspended by the suspension bolts 51. The RC wall 30 is restrained by the side steel bars 53 and the lower steel bars 52 that connect the ends 30a, 30b and the lower end 30c in the width direction W to the column 21 and the lower beam 22A, and the above-mentioned relative movement is suppressed. Thus, in this embodiment, the side steel bars 53 and the lower steel bar 52 act as anti-vibration members. Furthermore, since the rigidity of steel bars is smaller than that of columns 21 and beams 22, even if the RC beam-column structure 2 attempts to deform during an earthquake, the RC wall 30, the side steel bars 53, and the lower steel bars 52 do not significantly restrain this deformation. Therefore, by connecting the RC wall 30 to the columns 21 and beams 22 with the side steel bars 53 and the lower steel bars 52, the deformation performance of the RC beam-column structure 2 is not significantly impaired.

[0033] According to the RC wall structure 1 as described above, the RC wall structure 1 is composed of an RC column-beam structure 2 and an RC structural surface 3, and includes columns 21 and beams 22 that constitute the RC column-beam structure 2, and an RC wall 30 that forms the RC structural surface 3, and horizontal slits 42A, 42B are formed at the boundary between the beam 22 and the RC wall 30, and vertical slits 41A, 41B are formed at the boundary between the column 21 and the RC wall 30, and the horizontal slits 42A, 42B and vertical slits 41A, 41B are provided around the entire circumference of the RC wall 30, and the RC wall 30 is connected to the column 21 and beam 22 by connecting members 50 that are provided across the horizontal slits 42A, 42B and vertical slits 41A, 41B. According to the above-mentioned configuration, between the columns 21 and beams 22 constituting the RC column-beam frame 2 and the RC wall 30 forming the RC structural face 3, horizontal slits 42A, 42B and vertical slits 41A, 41B are provided around the entire periphery of the RC wall 30. In this way, the RC wall 30 and the columns 21 and beams 22 are separated by the horizontal slits 42A, 42B and the vertical slits 41A, 41B around the entire periphery of the RC wall 30, so that the RC wall 30 is prevented from restricting the deformation of the RC column-beam frame 2 during an earthquake. Therefore, the ductility of the RC column-beam frame 2 can be improved, and the deformation performance can be enhanced. In addition, the RC wall 30 is separated from the columns 21 and beams 22 by horizontal slits 42A, 42B and vertical slits 41A, 41B around the entire periphery of the RC wall 30. Therefore, even if the RC column-beam structure 2 deforms during an earthquake, the deformation is prevented from spreading to the RC wall 30 around the entire periphery of the RC wall 30. Therefore, damage to the RC wall 30 during an earthquake can be efficiently prevented. Furthermore, the RC wall 30 is connected to the column 21 and the beam 22 by connecting members 50 provided across the horizontal slits 42A, 42B and the vertical slits 41A, 41B. The connecting members 50 support the vertical load of the RC wall 30. Even if a load acts on the RC wall 30 in an out-of-plane direction during an earthquake, the connecting members 50 can resist this. As a result, it is possible to provide an RC wall structure 1 that can suppress damage to the RC wall 30 while improving the deformation performance of the RC column-beam structure 2 during an earthquake, and can efficiently resist vertical loads on the RC wall 30 and out-of-plane loads during an earthquake.

[0034] In addition, the connecting material 50 connecting the lower beam 22A of the RC wall 30 to the underside of the RC wall 30 is arranged to extend in the vertical direction H and has a lower steel rod 52 whose ends are embedded in each of the lower beam 22A and the RC wall 30. According to this configuration, the lower steel bar 52 is provided as a connecting member 50 connecting the lower beam 22A and the lower side of the RC wall 30, extending in the vertical direction H, and has its ends embedded in the beam 22A and the RC wall 30. The lower steel bar 52 is provided between the lower beam 22A and the RC wall 30 so as to straddle the horizontal slits 42A and 42B. The lower steel bar 52 restrains the movement of the RC wall 30 in the out-of-plane direction. In addition, since the rigidity of the steel bar is smaller than that of the column 21 and the beam 22, when the RC column-beam frame 2 tries to deform during an earthquake, the RC wall 30 and the lower steel bar 52 do not restrain this deformation significantly. Therefore, even if the RC wall 30 and the lower beam 22A are connected by the lower steel bar 52, the deformation performance of the RC column-beam frame 2 is not significantly impaired.

[0035] In addition, the connecting material 50 connecting the column 21 and the RC wall 30 is arranged extending in the width direction H of the RC wall 30, and has side steel rods 53 whose ends are embedded in each of the column 21 and the RC wall 30. According to this configuration, the connecting member 50 connecting the column 21 and the RC wall 30 includes a side steel bar 53 extending in the width direction H and having its ends embedded in the column 21 and the RC wall 30. The side steel bar 53 is provided between the column 21 and the RC wall 30 so as to straddle the vertical slits 41A and 41B. The side steel bar 53 restrains the movement of the RC wall 30 in the out-of-plane direction. In addition, since the rigidity of the steel bar is smaller than that of the column 21 and the beam 22, when the RC column-beam frame 2 tries to deform during an earthquake, the RC wall 30 and the side steel bar 53 do not restrain this deformation significantly. Therefore, even if the RC wall 30 and the column 21 are connected by the side steel bar 53, the deformation performance of the RC column-beam frame 2 is not significantly impaired.

[0036] In addition, the connecting material 50 connecting the upper beam 22B of the RC wall 30 to the upper side of the RC wall 30 is provided extending in the vertical direction H, and is equipped with a hanging bolt 51 whose end is embedded in each of the upper beam 22B and the RC wall 30 and fixed to the concrete that forms each of them. According to this configuration, the connecting member 50 connecting the upper beam 22B and the upper side of the RC wall 30 includes the hanging bolt 51 extending in the vertical direction H, with the end of the hanging bolt embedded in each of the upper beam 22B and the RC wall 30 and fixed to the concrete forming each of them. In this way, by providing the horizontal slits 42A, 42B and the vertical slits 41A, 41B around the entire periphery of the RC wall 30, it is possible to realize a structure in which the RC wall 30 is separated from the RC beam-column structure 2 while the load of the RC wall 30 is supported by the RC beam-column structure 2 via the hanging bolt 51.

[0037] In addition, a finishing material 35 is attached to the surface of the RC wall 30. According to such a configuration, by providing the RC structural face 3 having the RC wall 30 with the horizontal slits 42A, 42B and the vertical slits 41A, 41B provided all around, even if the RC column-beam structure 2 is deformed during an earthquake, the deformation is prevented from reaching the RC wall 30, and damage to the RC wall 30 is suppressed. Therefore, in the case where a finishing material 35 is attached to the RC wall 30, damage to the finishing material 35 is also suppressed.

[0038] In particular, in this embodiment, the finishing material 35 terminates at the end of the RC wall 30 and is provided so as not to protrude from the RC wall 30 into the areas of the horizontal slits 42A, 42B and the vertical slits 41A, 41B. With this configuration, even if the RC column-beam frame 2 deforms during an earthquake or the like and stress is exerted from the RC column-beam frame 2 to the RC wall 30 through the horizontal slits 42A, 42B and the vertical slits 41A, 41B, the finishing material 35 is arranged so as to terminate at the end of the RC wall 30 and not to protrude from the RC wall 30 into the areas of the horizontal slits 42A, 42B and the vertical slits 41A, 41B, so that the finishing material 35 is prevented from coming into contact with the columns 21 and beams 22. This makes it possible to prevent damage to the finishing material 35.

[0039] In addition, the RC wall 30 is surrounded on its entire periphery by fireproof materials 45A, 45B, and 45C that are provided so as to extend over the entire area in the vertical direction H and the width direction W. In such a configuration, the RC wall 30 is surrounded on its entire periphery by the fire-resistant materials 45A, 45B, and 45C, so that even if a fire breaks out on one side of the RC wall 30, the fire is prevented from spreading to the other side.

[0040] Furthermore, each hanging bolt 51 and each lower steel bar 52 is arranged to penetrate the fire-resistant materials 45B and 45C of the horizontal slits 42A and 42B, and each side steel bar 53 is arranged to penetrate the fire-resistant material 45A of the vertical slits 41A and 41B. In this configuration, the hanging bolts 51, the lower steel bars 52, and the side steel bars 53 are provided so as to penetrate the fire-resistant materials 45A, 45B, and 45C, so that the portions of the hanging bolts 51, the lower steel bars 52, and the side steel bars 53 that are exposed from the concrete and located in the portions corresponding to the horizontal slits 42A, 42B and the vertical slits 41A, 41B are surrounded by the fire-resistant materials 45A, 45B, and 45C. Therefore, even in the event of a fire, the strength of the hanging bolts 51, the lower steel bars 52, and the side steel bars 53 is reduced by heat, and the RC wall 30 is prevented from collapsing.

[0041] The hanging bolts 51 include a first hanging bolt 51A and a second hanging bolt 51B that are different in length, and the first hanging bolts 51A and the second hanging bolts 51B are arranged alternately in the width direction W. This configuration suppresses the formation of a fracture interface in the wall along the lower end positions of the hanging bolts 51A, 51B.

[0042] In addition, the above-mentioned RC wall structure 1 may be constructed when constructing a new building 100 by providing an RC wall 30 between two adjacent columns 21 in the horizontal direction W and two adjacent beams 22 in the vertical direction H. Alternatively, the above-mentioned RC wall structure 1 may be applied to a case where an opening 103 is formed between two columns 21 adjacent to each other in the horizontal direction W and two beams 22 adjacent to each other in the vertical direction H in an existing building 100, and an RC wall 30 is added to this opening 103 to close the opening 103. In this way, it is possible to add an RC wall 30 without impairing the deformation performance of the RC column-beam frame 2 of the existing building 100.

[0043] (First Modification of the Embodiment) The RC wall structure of the present invention is not limited to the above-mentioned embodiment described with reference to the drawings, and various modifications are possible within the technical scope of the invention. Fig. 6 is a front view showing an RC wall structure according to a first modified example of the embodiment. Fig. 7 is a diagram showing the configuration of a sliding support provided as a connecting material, and is a cross-sectional view of the portion viewed from the arrows IV-IV in Fig. 6. Fig. 8 is a cross-sectional view of the portion viewed from the arrows VV in Fig. 7. Fig. 9 is a cross-sectional view of the portion viewed from the arrows VI-VI in Fig. 7. For example, in the above embodiment, the connecting member 50 includes the hanging bolt 51, the lower steel bar 52, and the side steel bar 53, but is not limited to this. For example, as shown in FIG. 6, a connecting member 50 may include a sliding support 60 in addition to a hanging bolt 51, a lower steel bar 52, and a side steel bar 53. The sliding support bodies 60 support the RC wall 30 so that the RC wall 30 is movable horizontally relative to the beam 22A below. A plurality of sliding support bodies 60 are provided at the lower end portion 30c of the RC wall 30 at intervals in the extension direction (width direction W) of the beam 22A. As shown in Figs. 7 to 9, each sliding support body 60 has a support member 61, a shaft portion 62, a tip member 63, and a sliding plate 66.

[0044] The support member 61 extends in the thickness direction T of the RC wall 30, and one end 61a of the support member 61 is embedded in the RC wall 30. The other end 61b of the support member 61 protrudes from the RC wall 30 to one side in the thickness direction T, more specifically toward the indoor S2 side. The support member 61 is, for example, a channel steel, and has a pair of side plates 61s and a connecting plate 61t that connects the lower ends of the pair of side plates 61s to each other. The support member 61 has a reinforcing plate 61p provided along the wall surface of the RC wall 30 on the indoor S2 side. The reinforcing plate 61p is joined to each of the pair of side plates 61s and the connecting plate 61t between the pair of side plates 61s. Reinforcing bars 64 are joined to the pair of side plates 61s. The reinforcing bars 64 are provided so as to penetrate the pair of side plates 61s and extend toward both sides in the width direction W. The reinforcing bars 64 are embedded in the RC wall 30.

[0045] At the other end 61b of the support member 61, a receiving nut 65 is welded to the underside of the connecting plate 61t. A bolt is screwed into the receiving nut 65. The bolt is provided so as to pass through the connecting plate 61t from the underside to the upper side. In this embodiment, the shaft portion 62 of the sliding support body 60 is the shaft portion of the bolt provided in this manner. The tip member 63 is provided at the lower end of the support member 61. In this embodiment, the tip member 63 is the head of the bolt provided as described above. The sliding plate 66 is provided on the upper surface of the additional driving portion 24 of the lower beam 22A. The tip member 63 is provided on the sliding plate 66 so as to be slidable.

[0046] With this configuration, the load of the RC wall 30 is transmitted to the beam 22A below via the support member 61, the shaft portion 62, the tip member 63, and the sliding plate 66. As a result, the sliding support 60 supports the weight of the RC wall 30 together with the hanging bolt 51. The sliding support 60 also supports the RC wall 30 so that it can move horizontally relative to the beam 22A below.

[0047] According to the RC wall structure 1 of this modified example as described above, the connecting material 50 connecting the beam 22 below the RC wall 30 to the underside of the RC wall 30 extends in the vertical direction H and includes both a lower steel rod 52 whose ends are embedded in the beam 22A and the RC wall 30, and a sliding support 60 that supports the RC wall 30 so that the RC wall 30 can move horizontally relative to the lower beam 22A. According to this configuration, the lower steel bar 52 is provided as a connecting member 50 connecting the lower beam 22A and the lower side of the RC wall 30, extending in the vertical direction H, and has its ends embedded in the beam 22A and the RC wall 30. The lower steel bar 52 is provided between the lower beam 22A and the RC wall 30 so as to straddle the horizontal slits 42A and 42B. The lower steel bar 52 restrains the movement of the RC wall 30 in the out-of-plane direction. In addition, since the rigidity of the steel bar is smaller than that of the column 21 and the beam 22, when the RC column-beam frame 2 tries to deform during an earthquake, the RC wall 30 and the lower steel bar 52 do not restrain this deformation significantly. Therefore, even if the RC wall 30 and the lower beam 22A are connected by the lower steel bar 52, the deformation performance of the RC column-beam frame 2 is not significantly impaired. In addition, as the connecting member 50 connecting the lower beam 22A and the underside of the RC wall 30, a sliding support 60 is provided to support the RC wall 30 so that the RC wall 30 can move horizontally relative to the lower beam 22A. The sliding support 60 allows the load of the RC wall 30 to be transmitted to the lower beam 22A. Furthermore, as described above, when the RC column-beam structure 2 tries to deform during an earthquake, causing the RC wall 30 to move relative to the lower beam 22A, the sliding support 60 allows this relative movement, and restricts the RC wall 30 from restricting the deformation of the RC column-beam structure 2. In this way, a structure can be realized that supports the RC wall 30 while preventing the RC wall 30 from impairing the deformation of the RC column-beam structure 2, and that can efficiently resist the vertical load of the RC wall 30 and the out-of-plane load during an earthquake.

[0048] (Second Modification of the Embodiment) Fig. 10 is a front view showing an RC wall structure according to a second modified example of the embodiment. Fig. 11 is a diagram showing the configuration of a column joint member provided as a connecting material, and is a cross-sectional view of the portion viewed from the arrows VII-VII in Fig. 10. Fig. 12 is a cross-sectional view of the portion viewed from the arrows VIII-VIII in Fig. 11. Fig. 13 is a cross-sectional view of the portion viewed from the arrows IX-IX in Fig. 11. In this modification, the connecting material 50 further includes a column joint member 70 in addition to the configuration shown in the first modification. As shown in Fig. 10, a plurality of column joint members 70 are provided in each of the vertical slits 41A, 41B at intervals in the vertical direction H in which the columns 21A, 21B extend. As shown in Figs. 11 to 13, each column joint member 70 includes a plate member 71 and joint bolts 72A, 72B.

[0049] The plate member 71 is a steel material formed to be L-shaped when viewed from the vertical direction H. The plate member 71 has a first plate portion 71a provided along the surface of the RC wall 30 on the indoor S2 side, and a second plate portion 71b extending from an end of the first plate portion 71a located on the pillars 21A, 21B side in a direction intersecting the first plate portion 71a, i.e., in the thickness direction T, and provided along the pillar side surfaces 21s of the pillars 21A, 21B. The fastening bolt 72A penetrates the first plate portion 71a and is fixed to the concrete that forms the concrete portion 30p of the RC wall 30. The fastening bolts 72B pass through the second plate portion 71b and are fixed to the concrete that forms the concrete portions 21c of the pillars 21A, 21B.

[0050] According to the RC wall structure 1 of this modified example as described above, the connection material 50 connecting the column 21 and the RC wall 30 is provided with a column connection material 70 that is arranged across the vertical slits 41A, 41B and includes a steel material (plate material) 71 joined to each of the column 21 and the RC wall 30. According to such a configuration, the steel material (plate member) 71 can bear the out-of-plane stress of the RC wall 30.

[0051] The RC wall structure of the present invention is not limited to the above-mentioned embodiment and each of the modified examples described with reference to the drawings, and various other modified examples are conceivable within the technical scope thereof. For example, in the above first modified example, the connecting material 50 is provided with both the lower steel bar 52 and the sliding support body 60, but alternatively, the lower steel bar 52 may be omitted and only the sliding support body 60 may be provided. That is, the connecting member 50 connecting the lower beam 22 of the RC wall 30 to the underside of the RC wall 30 may be configured to include only the sliding support 60 that supports the RC wall 30 so that it can move horizontally relative to the lower beam 22A. However, in this case, in order to suppress movement of the RC wall 30 relative to the RC column-beam frame 2, it is preferable that the side steel bar 53 is not omitted but is included as the connecting member 50 connecting the column 21 to the RC wall 30.

[0052] In the above embodiment, the RC wall structure 1 is an exterior wall provided on the outer periphery 100f of the building 100, but is not limited to this. The RC wall structure 1 may be an interior wall provided inside the building 100. In the above embodiment, the steel bars (lower steel bar 52 and side steel bar 53) are made of reinforcing bars, but are not limited to this. The lower steel bar 52 and side steel bar 53 may have any shape, such as a circular, square, or polygonal cross section, as long as they are rod-shaped steel materials. In addition to the configuration of the above embodiment, the second modified example includes both the column joint member 70 including the plate member 71 and the sliding support body 60 as the connecting member 50, but is not limited to this. For example, the sliding support body 60 may be omitted from the configuration of the above second modified example. 4, the beam 22A has the additional portion 24 on the upper side of the beam 22A so as to protrude upward from the upper surface 22t of the beam 22A, and the RC wall 30 is provided above the additional portion 24 with the horizontal slit 42A in between, but this is not limited to the above. For example, the beam 22A may be configured not to have the additional portion 24, and the RC wall 30 may be provided directly above the upper surface 22t of the beam 22A with the horizontal slit 42A in between. Similarly, in the above embodiment, as shown in Fig. 5, the beam 22B has an additional portion 27 on the lower side of the beam 22B so as to protrude downward from the lower surface 22s of the beam 22B, and the RC wall 30 is provided below the additional portion 27 with a horizontal slit 42B in between, but this is not limited to the above. For example, the beam 22B may be configured not to have the additional portion 27, and the RC wall 30 may be provided directly below the lower surface 22s of the beam 22B with a horizontal slit 42B in between. In addition, it is possible to select and discard the configurations given in the above embodiment and each modified example, or to change them to other configurations as appropriate. [Explanation of symbols]

[0053] 1 RC wall structure 42A, 42B Horizontal slits 2 RC column beam frame 50 Connection material 3 RC structure 52 Lower steel bar 21, 21A, 21B Column 60 Sliding support 22, 22A, 22B Beam 70 Column joint member 30 RC wall 71 Plate member 35 Finishing materials 100 Buildings 41A, 41B Vertical slit 100f Outer periphery

Claims

1. An RC wall structure consisting of an RC column-beam frame and an RC structural surface, Columns and beams constituting the RC column-beam frame; An RC wall forming the RC structural surface; Equipped with A horizontal slit is formed at the boundary between the beam and the RC wall, A vertical slit is formed at the boundary between the column and the RC wall, The horizontal slits and the vertical slits are provided around the entire periphery of the RC wall, An RC wall structure characterized in that the RC wall, the columns, and the beams are connected by connecting materials that span the horizontal slits and the vertical slits.

2. The connecting member connecting the beam below the RC wall and the underside of the RC wall is A lower steel rod extending vertically and having ends embedded in the lower beam and the RC wall; a sliding support that supports the RC wall so that the RC wall can move horizontally relative to the lower beam; 2. The reinforced concrete wall structure according to claim 1, further comprising one or both of the following:

3. The RC wall structure according to claim 1 or 2, characterized in that the connecting material connecting the column and the RC wall is provided with a column connecting member including a plate member arranged across the vertical slit and joined to each of the column and the RC wall.

4. 3. The reinforced concrete wall structure according to claim 1, wherein a finishing material is attached to a surface of the reinforced concrete wall.

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