JP6468733B2 - Seismic wall structure - Google Patents

Description

  The present invention relates to a seismic wall structure.

  It is known to reinforce earthquake resistance by adding reinforced concrete or other seismic walls in a frame framed between columns and beams of a reinforced concrete or steel reinforced concrete structure. However, if an opening such as a passage opening is provided in the seismic wall, the proof strength of the seismic wall decreases, and as a result, the seismic performance decreases.

  Therefore, in Patent Document 1, there is a technique in which a joining member is disposed along the lower side of the passage opening formed in the wall body, and further, the joining member is projected to the side of the passage opening and embedded in the wall body with a shear key. It is disclosed.

  Moreover, when a seismic wall is constituted by the block walls in which the blocks are stacked, it is necessary to penetrate the vertical and horizontal bars through the block wall and to join the vertical and horizontal bars to the frame (column beam). In addition, when the opening is formed, it is necessary to reinforce the opening by providing a steel frame or the like, and it is necessary to join the vertical and horizontal bars to the steel frame.

  Therefore, it is desired to easily provide a seismic wall having an opening on a frame with a block.

JP 2006-63732 A

  In view of the above facts, an object of the present invention is to easily provide a seismic wall having an opening on a frame with a block while ensuring seismic performance.

According to the first aspect of the present invention, there is provided a block in which an opening is formed in a frame composed of a column and a beam or a slab, and an inclined portion is formed on the upper surface and the lower surface. A block wall piled up so as to overlap, a reinforcing member provided in the opening and joined to an inner wall of the opening, between the reinforcing member and the block wall, and the block wall and the column Between the side end of the block wall and the reinforcing member and the column, respectively. The side end of the block wall, the reinforcing member, and the column have a tensile force composed of a filler filled in the gap and a splitting prevention bar arranged in the filler. They are joined via joints that do not expect transmission .

  According to the first aspect of the present invention, the horizontal force input to the upper corner portion of the block wall is transmitted to the lower corner portion by the compressive force acting on the inclined portion of the block. Therefore, the shear force that deforms the frame is transmitted from the upper corner of the frame to the lower corner of the frame via the beam or slab, the block wall, and the reinforcing member of the opening, and the deformation of the frame is suppressed. The

  In addition, the block wall transmits a shearing force by a compression strut and does not expect transmission by a tensile force. Therefore, it is not necessary to join between the block wall and the reinforcing member and between the block wall and the column with an anchor or the like that transmits a tensile force. Can be filled. Therefore, compared to the case of joining with an anchor or the like that transmits a tensile force, the construction is easy.

  Therefore, the seismic wall having the opening can be easily provided on the frame with the block while ensuring the seismic performance.

  According to a second aspect of the present invention, the reinforcing member has a steel frame joined to the entire circumference of the inner wall of the opening.

  In the second aspect of the invention, the opening is effectively reinforced by the steel frame joined to the entire circumference of the inner wall of the opening, and the horizontal force is effectively transmitted to the block wall. .

  ADVANTAGE OF THE INVENTION According to this invention, the seismic wall which has an opening part can be easily provided in a frame with a block, ensuring seismic performance.

It is a front view of the frame provided with the earthquake-resistant wall which concerns on one Embodiment of this invention. It is a perspective view in the middle of construction of the earthquake-resistant wall of FIG. It is an enlarged front view which shows the junction part of the earthquake-resistant wall of FIG. 1, and an upper beam. FIG. 2A is a front view illustrating a joint portion between the earthquake-resistant wall and the lower beam in FIG. 1, and FIG. 3B is a cross-sectional view taken along line BB in FIG. (A) is sectional drawing along the 5A-5A line of FIG. 1, (B) is sectional drawing along the 5B-5B line of FIG. It is explanatory drawing explaining that a shear force is transmitted through a block wall by a compression strut. (A) is a front view showing the earthquake-resistant wall of the first modified example, (B) is a front view showing the earthquake-resistant wall of the second modified example, and (C) is a front view showing the earthquake-resistant wall of the third modified example. FIG. (D) is a front view showing the earthquake-resistant wall of the fourth modified example, and (E) is a front view showing the earthquake-resistant wall of the fifth modified example. It is an enlarged front view of the block wall constructed | assembled with the block of the other example. (A) is explanatory drawing explaining transmission of the shear force when horizontally displaced to the frame in the right direction, and (B) is an explanatory diagram explaining transmission of shear force when horizontally displaced to the frame in the left direction. is there.

An example of a seismic wall structure according to an embodiment of the present invention will be described.
<Overall configuration>
As shown in FIG. 1, the seismic wall 100 of the present embodiment is provided on a frame 10 surrounded by left and right columns 12L and 12R and upper and lower beams 14U and 14L constituting a structure 11. The earthquake resistant wall 100 has a block wall 50 provided so that the opening 30 is formed, and a steel frame 70 provided in the opening 30. In addition, in this embodiment, although the structure 11 (frame 10) is a reinforced concrete structure, it is not specified to a reinforced concrete structure.

<Block walls and blocks>
Next, the block wall and the block will be described.

  As shown in FIG. 1, the block wall 50 is constructed by laying up a block 52 for constructing a wall body. The “clothing” is a stacking method in which the walls are constructed by arranging the blocks in a staggered manner with respect to the vertical direction.

  As shown in FIGS. 2 and 6, the block 52 has a so-called butterfly shape in which the width in the vertical direction becomes shorter from the both ends in the horizontal direction toward the center in the front view. Note that the front view is a case where the block wall 50 is viewed in an out-of-plane direction. Further, hereinafter, in the description of the shape of the block 52, it is assumed to be in a front view unless otherwise specified.

  As shown in FIG. 2, the block 52 includes an upper surface 54, a lower surface 56, a front surface 62, a back surface 64, a first side surface 66, and a second side surface 68.

  The upper surface 54 of the block 52 is formed with inclined surfaces 54A and 54B that are inclined downward from both ends toward the center. In other words, the upper surface 54 is composed of a pair of left and right inclined surfaces 54A and 54B. Similarly, the lower surface 56 of the block 52 is formed with inclined surfaces 56 </ b> A and 56 </ b> B that are inclined upward from both ends toward the center. In other words, the lower surface 56 includes a pair of left and right inclined surfaces 56A and 56B.

  The first side surface 66 and the second side surface 68 of the block 52 are formed with semicircular recesses 67 and 69 in a plan view (when viewed from above) (see also FIG. 5B). In addition, a through hole 58 that opens to the upper surface 54 and the lower surface 56 is formed in the central portion of the block 52 in the horizontal direction (see also FIG. 5B).

  In the state where the block 52 is piled up and becomes the block wall 50 (the first side surface 66 and the second side surface 68 are in contact), the concave portion 67 and the concave portion 69 are connected to form a through hole 59 (FIG. 5). (See also (B)). Further, the through hole 59 has the same size as the through hole 58.

  Further, the block 52 is formed with a guide portion 60 that communicates the concave portion 69 of the second side surface 68 with the through hole 58. The guide part 60 has a narrower width in the out-of-plane direction than the through hole 58 and the recessed part 69 (see also FIG. 5B).

(Block cloth method)
Next, an example of a method for laying the block 52 will be described.

  First, the reinforcing bars 40 are joined (fixed) to the upper and lower beams 14U and 14L (see FIGS. 1 and 3). A plurality of reinforcing bars 40 are joined at intervals in the left-right direction. The interval between the reinforcing bars 40 is provided so as to coincide with the interval between the through holes 58 and 59.

  Next, the block 52 is moved to reach the through hole 58 from the second side surface 68 of the block 52 through the guide portion 60 to the reinforcing bar 40. When the reinforcing bar 40 reaches the through hole 44, the block 52 is rotated 90 degrees so that the front surface 62 and the rear surface 64 of the block 52 are in the in-plane direction.

  In this way, the blocks 52 are stacked in order from the lower side. At this time, the inclined surface 54A and the inclined surface 56B, and the inclined surface 54B and the inclined surface 56A are stacked so as to overlap each other.

  In addition, when rotating the block 52, in order to avoid interference with the block 52 already arrange | positioned, the block 52 already arrange | positioned respond | corresponds suitably, such as shifting in the horizontal direction.

  The block wall 50 constructed in this manner is arranged in a zigzag pattern with the blocks 52 shifted in the left-right direction by half, and the block walls 50 are piled up so that the inclined surfaces 54A, 54B and the inclined surfaces 56A, 56B overlap each other. (See also FIG. 6).

  In the present embodiment, the through holes 58 and 59 and the guide portion 60 are filled with a filler M such as mortar (see FIG. 5B). In this embodiment, the block 52 has an upper surface 54, a lower surface 56, a first side surface 66, and a second side surface 68 that are adhesively bonded by applying a resin adhesive such as an epoxy resin.

  In this embodiment, as shown in FIG. 1, butterfly-shaped steel frame opening members 51 having the same outer shape as the block 52 are piled up in the same manner as the block 52. The steel opening member 51 is used as an opening for opening an equipment.

  120A (FIG. 1) between the side end 50L of the block wall 50 and the column 12L, and 120C (FIG. 1) between the side end 50R of the block wall 50 and the steel column 72L constituting the steel frame 70. The structure of FIG. 5B will be described later.

<Steel frame>
Next, the steel frame 70 provided in the opening 30 will be described.

  As shown in FIG. 1, the steel frame 70 is joined over the entire circumference of the inner wall 32 of the opening 30 (the column 12R, the beams 14U and 14L, and the end surface in the out-of-plane direction of the block wall 50). . The steel frame 70 includes left and right steel columns 72L and 72R, a steel beam 74, and a steel plate 76 that are welded.

  The left and right steel pillars 72R and 72L constituting the steel frame 70 are joined to the pillar 12R and the block wall 50 via joints 120B and 120C. The structure of the joint 120C (FIGS. 1 and 5A) between the steel column 72L and the column 12R will be described later.

  As shown in FIG. 3, the steel columns 72L and 72R (see also FIG. 1) and the steel beam 74 are joined to the upper beam 14U by a post-installed anchor 80. Further, as shown in FIG. 4A, the steel columns 72L and 72R and the lower beam 14L are similarly joined by an anchor 80.

  As shown in FIG. 4, the steel plate 76 has a structure having a plate portion 79 and a rib 78 joined to the upper surface 79U of the plate portion 79 along the left-right direction. Then, the plate portion 79 of the steel plate 76 is joined to the lower beam 14L by a post-installed anchor 80.

  In addition, as shown in FIG. 1, the reverse U-shape which can be utilized as a channel | path opening (door opening) which uses the steel plate 76 as a discharge part by joining the steel frame 70 to the perimeter of the inner wall 32 of the opening part 30. The opening 31 is formed.

<Joint part>
Next, a joint 120A (FIG. 1) between the side end 50R of the block wall 50 and the column 12L (FIG. 1), and a joint 120B between the side end 50R of the block wall 50 and the steel column 72L of the steel frame 70 (FIG. 1, FIG. 2 and FIG. 5B), the structure of the joint 120C (FIGS. 1 and 5A) between the steel column 72L and the column 12L of the steel frame 70 will be described.

  As shown in FIG. 1, FIG. 2, FIG. 5 (A), FIG. 5 (B), these joints 120A, 120B, 120C are filled with a filler M such as mortar in the gaps 122A, 122B, 122C between them. In addition to filling, spiral splitting prevention bars 124A, 124B, and 124C made of reinforcing bars are arranged (embedded).

  Note that these joints 120A, 120B, and 120C transmit a compressive force, but do not transmit or hardly transmit a tensile force.

  In addition, since the joint portions 120A, 120B, and 120C have the same configuration as described above, hereinafter, description may be made without omitting A, B, and C after the reference numerals.

<Action and effect>
Next, functions and effects of the present embodiment will be described.

  As shown in FIG. 6, the horizontal force (shearing force) S input to the block wall 50 is caused by the compression force V acting on the inclined surfaces 54 </ b> A, 54 </ b> B, 56 </ b> A, 56 </ b> B of the block 52. Acts sequentially. Therefore, compared with the structure which transmits a horizontal force with the shear frictional force between blocks, a transmission force is large and can counter a horizontal force, without providing a horizontal reinforcement (horizontal reinforcement).

  As shown in FIG. 9A, in a front view, when a shearing force acts on the frame 10 as indicated by an arrow WA, the shearing force is applied to the upper left corner 55A of the block wall 50 via the column 12L and the joint 120A. Entered. The shear force input to the upper left corner 55A of the block wall 50 is shifted to the right by the compression strut (the compression force V (see FIG. 6) acting on the inclined surfaces 54A, 54B, 56A, and 56B described above) indicated by the arrow VA. It is transmitted to the lower corner 57A.

  The shearing force transmitted to the lower right corner 57A is transmitted to the steel frame 70 via the joint 120B. Then, as shown by the arrow TA, the steel column 72L, the steel plate 76, and the steel column 72R are transmitted. At this time, since the rib 78 is provided on the steel plate 76, the shearing force is effectively transmitted. Then, the shearing force transmitted to the steel column 72R is transmitted to the column 12R through the joint 120C.

  As shown in FIG. 9B, when the shearing force acts on the frame 10 as shown by the arrow WB in the front view, the shearing force is transmitted to the steel frame 70 via the column 12R and the joint 120C. Then, as shown by the arrow TB, the steel column 72R, the steel beam 74, and the steel column 72L are transmitted. The shearing force transmitted to the steel column 72L is input to the upper right corner 55B of the block wall 50 through the joint 120B. The shear force input to the upper right corner 55B of the block wall 50 is transmitted to the left corner 57B by a compression strut V (compression force V (see FIG. 6)) indicated by an arrow VB.

  Thus, the shear force (horizontal force) that deforms the frame 10 is transmitted from the left and right upper corners of the frame 10 to the left and right lower corners of the frame 10, and deformation of the frame 10 is suppressed. The shear force is mainly transmitted through the steel plate 76 and the steel beam 74, but is also transmitted through the beams 14U and 14L.

  Further, the block wall 50 transmits shearing force by the compression struts VA and VB (compression force V (see FIG. 6)) and does not expect transmission of tensile force. Therefore, a joint 120A (see FIG. 1) between the side end 50R of the block wall 50 and the column 12L (see FIG. 1) and a joint 120B between the side end 50R of the block wall 50 and the steel column 72L of the steel frame 70 (FIG. 1, In FIG. 2 and FIG. 5B, it is not necessary to join with an anchor or the like that transmits a tensile force. If an excessive tensile force is transmitted to the block wall 50, the block 52 may be damaged.

  Therefore, the joints 120A and 120B between them may be filled with the filler M by arranging the splitting prevention bars 124. Therefore, compared with the case where the block wall 50 is joined with an anchor or the like that transmits a tensile force, the construction is easy.

  Further, as described above, by using the butterfly-shaped block 52 having the inclined surfaces 54A, 54B, 56A, and 56B, the shearing force input to the block wall 50 is sequentially applied to the lower block 52 by the compression force V. (Compressed struts VA and VB (see FIG. 9)). Accordingly, the horizontal force can be countered despite the structure in which the blocks 52 are stacked without providing horizontal reinforcing bars (horizontal bars). That is, horizontal reinforcing bars (lateral bars) are not required. Furthermore, in this embodiment, as shown in FIG. 2, the blocks 52 can be stacked from the front side.

  Therefore, the seismic wall 100 having the opening 30 (opening 31) can be easily provided on the frame 10 by the block 52 while ensuring seismic performance.

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

  For example, in the above embodiment, the joint 120C between the column 12R and the steel column 72R of the steel frame 70 is configured by the filler M and the splitting prevention muscle 124C, but is not limited thereto. For example, the column 12R and the steel column 72R of the steel frame 70 may be joined so that a shearing force is transmitted by an anchor, a stud, or the like.

  Further, the reinforcing member provided in the opening 30 is not limited to the frame-shaped steel frame 70. At least the steel column 72L is sufficient. When the steel beam 74 and the steel plate 76 are not provided, the beams 14U and 14L transmit a shearing force between the block wall 50 and the beams 14U and 14L.

  Moreover, the block which comprises a block wall is not limited to what is called butterfly type (refer FIG. 2 etc.) of the said embodiment. For example, as shown in FIG. 8, a combination of a block 252 having curved surfaces 254A, 254B, 256A, and 256B and a block 253 having curved surfaces 255A, 255B, 257A, and 257B may be used. Moreover, an inclination part may be either one instead of a pair of right and left. The point is that the horizontal force (shearing force) is sequentially transmitted to the lower block by the compressive force (compression strut) acting on the inclined portion.

  Further, the block wall 50 is provided with reinforcing bars 40 for preventing out-of-plane collapse in the vertical direction, but the present invention is not limited to this. The reinforcing bars 40 need not be arranged. When the reinforcing bars 40 are not arranged, the block wall 50 and the beams 14U and 14L are joined with an anchor or the like in order to prevent the block wall 50 from falling out of the plane.

[Aperture]
The shape of the opening is not limited to the above embodiment. Therefore, a modified example of the opening will be described next. Also in the modified example, the filler M and the splitting prevention bars 124 are provided between the steel frame or the steel member and the side end of the block wall and between the side end of the block wall and the columns 12L and 12R. Since it is the structure similar to the comprised junction part 120, description is abbreviate | omitted.

(First modification)
In the earthquake-resistant wall 102 of the first modification shown in FIG. 7A, the upper right portion of the block wall 150 is joined to the upper portion of the upper beam 14U and the right column 12R. Then, the inverted U-shaped opening 131 is formed by joining the steel frame 170 to the opening 130.

(Second modification)
In the earthquake-resistant wall 104 of the second modified example shown in FIG. 7B, an opening 230 is formed by opening the central portion in the left-right direction of the block wall 250 in an inverted U shape. Then, by joining the steel frame 270 to the opening 230, an inverted U-shaped opening 231 is formed.

(Third modification)
In the earthquake-resistant wall 106 of the third modified example shown in FIG. 7C, an opening 330 is formed by opening the central portion of the block wall 350. Then, the rectangular opening 231 is formed by joining the steel frame 270 to the opening 230.

(Fourth modification)
In the seismic wall 108 of the fourth modified example shown in FIG. 7D, the block wall 450 is joined to the lower beam 14L and the left and right columns 12L and 12R, and the space between the block wall 450 and the upper beam 14U is between. An opening 430 is formed. A steel frame member 470 is provided below the opening 430 and joined to the left and right columns 12R and 12L and the block wall 450. An opening 431 is formed between the steel member 470 and the upper beam 14U.

(Fifth modification)
In the seismic wall 109 of the fifth modification shown in FIG. 7E, the block wall 250 is joined to the lower beam 14L and the left column 12L, and the block wall 250, the upper beam 14U and the right column 12R An opening 530 is formed between the two. Then, the vertical member 572 constituting the T-shaped steel member 570 that is horizontally oriented in the front view is joined to the upper and lower beams 14U and 14L and the block wall 250, and the lateral member 574 is joined to the block wall 250 and the column 12L. Yes. In addition, by joining the steel member 570 to the opening 530, the left opening 571A and the upper opening 571B are formed.

<Others>
The present invention is not limited to the above embodiment.

  Further, for example, in the above embodiment, the steel frame (reinforcing member) is configured by welding and joining a plurality of steel frames, but is not limited thereto. For example, it may be configured by bolting a plurality of steel members.

  For example, the reinforcing member may be other than steel (steel). For example, a reinforcing member made of wood or precast concrete may be used.

  Further, for example, in the above-described embodiment, the frame 10 is configured to be surrounded by the columns 12L and 12R and the beams 14U and 14L, but is not limited thereto. Instead of the beams 14U and 14L, they may be surrounded by slabs and columns.

  Further, for example, in the above embodiment, as shown in FIG. 1, the steel frame opening member 51 used as an equipment opening has a butterfly shape having the same outer shape as the block 52, but is not limited to such an outer shape. An outer shape different from the outer shape of the block 52, for example, a rectangular shape may be used. Further, the steel opening member may not be provided.

  Further, for example, in the above embodiment, the steel plate 76 is provided with the ribs 78, but the present invention is not limited to this. If the plate thickness of the steel plate 76 is large and the steel plate 76 has sufficient performance to transmit shearing force, the rib 78 may be omitted.

  Further, for example, in the above-described embodiment, the splitting prevention bar is configured by a spiral reinforcing bar, but is not limited thereto. As long as it has a split preventing function, it may have a shape other than the spiral shape, for example, a branch line shape.

  Furthermore, it cannot be overemphasized that it can implement with a various aspect in the range which does not deviate from the summary of this invention.

10 frame 12R column 12L column 14U beam 14L beam 30 opening 32 inner wall 50 block wall 52 block 54 upper surface 54A inclined surface (inclined portion)
54B inclined surface (inclined part)
56 Lower surface 56A Inclined surface (inclined part)
56B inclined surface (inclined part)
70 Steel frame (an example of a reinforcing member)
DESCRIPTION OF SYMBOLS 100 Earthquake-resistant wall 102 Earthquake-resistant wall 104 Earthquake-resistant wall 106 Earthquake-resistant wall 108 Earthquake-resistant wall 109 Earthquake-resistant wall 124 Splitting prevention muscle 130 Opening part 150 Block wall 170 Steel frame (an example of a reinforcing member)
230 Opening 250 Block wall 252 Block 253 Block 254A Curved surface (inclined part)
254B Curved surface (inclined part)
255A Curved surface (inclined part)
255B Curved surface (inclined part)
256A Curved surface (inclined part)
256B Curved surface (inclined part)
257A Curved surface (inclined part)
257B Curved surface (inclined part)
270 Steel frame (an example of a reinforcing member)
330 Opening 350 Block Wall 370 Steel Frame (an example of a reinforcing member)
430 Opening 450 Block wall 470 Steel member (an example of a reinforcing member)
530 Opening 550 Block wall 570 Steel member (an example of a reinforcing member)
M filler

Claims (2)

A block that is provided with an opening formed in a frame composed of columns and beams or slabs, and in which an inclined portion is formed on the upper surface and the lower surface, is piled up so that the inclined portions overlap each other vertically. Block wall,
A reinforcing member provided in the opening and joined to the inner wall of the opening;
A filler filled between the reinforcing member and the block wall and between the block wall and the pillar;
Anti-split muscles arranged in the filler,
With
A space is provided between the side end of the block wall and the reinforcing member and the column.
The side end portion of the block wall, the reinforcing member, and the column do not expect transmission of a tensile force composed of a filler filled in the gap and a split prevention bar arranged in the filler. Joined through the joint,
Seismic wall structure. The reinforcing member has a steel frame joined to the entire circumference of the inner wall of the opening.
Seismic Kabe構Concrete according to claim 1.

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