JP2016017323A - Damping structure - Google Patents

Abstract

An object of the present invention is to provide a vibration control structure capable of increasing the degree of freedom of design of a building.
SOLUTION: A vibration control structure 5 in which an external force absorbing damper 20 is provided between adjacent pillars 3 and 3 via a pair of mounting brackets 10 and 10, and the external force absorbing damper 20 is made of a hollow extruded shape member. The hollow extruded shape member includes a pair of side plates 21 and 21 arranged at intervals, and a plurality of ribs 22, 22... Arranged between the pair of side plates 21 and 21. 10 is provided between the pillars 3 and 3 and extends along the pillar 3.
[Selection] Figure 1

Description

  The present invention relates to a vibration control structure.

  Conventionally, as a seismic control structure of a building, an oblique member (bar crossing) with an external force absorbing damper is provided in a rectangular space formed by structural members such as foundations, columns, and horizontal members. (For example, refer to Patent Document 1).

  In the vibration control structure of Patent Document 1, a shape member in which a plurality of ribs are arranged between a pair of side pieces is used as an external force absorbing damper. The rib can be deformed according to an external force applied to the structural member. The diagonal material is formed of a hollow extruded shape having a rectangular cross section, and is divided in the middle. The external force absorbing damper is mounted inside the hollow portion of the diagonal member, and the side pieces of the external force absorbing damper are fixed to surfaces facing each other at the cut portion of the diagonal member. With such a configuration, when stress is applied in the axial direction of the diagonal member, the pair of side plates of the external force absorbing damper are displaced from each other, and the rib is deformed.

JP 2012-251364 A

  In the vibration control structure of Patent Document 1, the number of external force absorbing dampers that can be installed is limited because the external force absorbing dampers are provided inside the hollow portion of the diagonal member. For this reason, there is a problem that the number of places where the damping structure is provided increases. For example, in a 3 to 4 LDK two-story wooden house, it is necessary to provide two locations in the X-axis direction and the Y-axis direction. In such a vibration control structure, since diagonal members are arranged obliquely between columns, an opening cannot be formed in the wall on which the diagonal members are arranged, resulting in a low degree of freedom in design.

  From such a viewpoint, it is an object of the present invention to provide a vibration control structure that can increase the degree of freedom in designing a building.

  The invention according to claim 1 for solving the above problem is a vibration control structure in which an external force absorbing damper is provided between adjacent columns via a pair of mounting brackets, and the external force absorbing damper is a hollow extrusion. The hollow extruded profile comprises a pair of side plates arranged at intervals and a plurality of ribs arranged between the pair of side plates, and the mounting bracket is provided between the columns. And a vibration control structure that extends along the column.

  The pillar in the present invention indicates a structural material extending in the vertical direction, and includes a vertical frame in the two-by-four method. ADVANTAGE OF THE INVENTION According to this invention, when a pillar inclines with external forces, such as the seismic force which acted on the building, vibration energy can be absorbed because a some rib of an external force absorption damper deform | transforms. If the mounting bracket is enlarged, the number of external force absorbing dampers connected can be increased, so that the damping performance of one place of the damping structure can be improved. As a result, the number of installation locations of the vibration control structure can be reduced, so that the installation restrictions on the walls and the openings are reduced, and the design freedom of the building can be increased.

  The invention according to claim 2 is characterized in that the external force absorbing dampers are arranged in a plurality of rows in the separating direction of the pillars and in a plurality of stages in the vertical direction.

  According to such a configuration, a large number of external force absorbing dampers can be installed and a large damping effect can be obtained with a single damping structure, so that the number of installation locations of the damping structure in the entire building can be further reduced.

  In the invention which concerns on Claim 3, the extrusion direction edge part of the said side plate is extended in the extrusion direction outer side rather than the edge of the extrusion direction of the said rib, It is characterized by the above-mentioned.

  According to such a structure, since the extrusion direction edge part of the side plate in which a rib is not located can be joined, it is easy to perform joining work.

  In the invention which concerns on Claim 4, between the said pillar and the said attachment bracket, the pillar accessory which extends along the said pillar is provided. The mounting bracket is made of an aluminum alloy shaped material having an H-shaped cross section, and is fixed to the side plate in a state where one flange is in contact with the surface of the side plate. The column attachment material is made of an aluminum alloy shaped material having an H-shaped cross section, and is fixed in a state where one flange is in contact with the side surface of the column. Further, the other flange of the mounting bracket and the other flange of the column attachment material are fixed in a state of being in contact with each other.

  According to such a structure, even when the distance between pillars is long, it can respond. Further, it is possible to reinforce the column main body by lengthening the column attachment material. Thus, even a building having a column with a small cross-sectional area such as a two-by-four method (wooden framed wall structure) can be applied.

  According to the vibration control structure according to the present invention, the degree of freedom in designing a building can be increased.

It is the figure which showed the damping structure which concerns on 1st embodiment of this invention, Comprising: (a) is a top view, (b) is a front view. It is the figure which showed the external force absorption damper of the damping structure which concerns on 1st embodiment of this invention, Comprising: (a) is a front view, (b) is a side view. It is the perspective view which showed the external force absorption damper of the damping structure which concerns on 1st embodiment of this invention. It is the figure which showed the damping structure which concerns on 2nd embodiment of this invention, Comprising: (a) is a top view, (b) is a front view. It is the perspective view which showed the external force absorption damper of the damping structure which concerns on 2nd embodiment of this invention. It is the perspective view which showed the modification of the external force absorption damper of the damping structure which concerns on 2nd embodiment of this invention.

  Hereinafter, a vibration control structure according to a first embodiment of the present invention will be described in detail with reference to the accompanying drawings. The vibration control structure according to the first embodiment is applied to a wooden frame construction method (conventional construction method).

  As shown in FIG. 1, in the wooden frame construction method, for example, a wooden base 2 is laid on a reinforced concrete foundation 1, and columns 3 and 3 are erected thereon. A beam 4 is installed above the columns 3 and 3. The vibration control structure 5 is provided between adjacent columns 3 and 3 and includes a mounting bracket 10 and an external force absorbing damper 20.

  The external force absorbing damper 20 is disposed at a position away from the column 3. The mounting bracket 10 is for attaching the external force absorbing damper 20 to the column 3, and is provided between the external force absorbing damper 20 and the column 3. The mounting bracket 10 is provided on each of the left and right sides of the external force absorbing damper 20. In the present embodiment, the mounting bracket 10 is disposed at a position away from the pillar 3. Between the mounting bracket 10 and the column 3, a column attachment 15 is provided.

  The mounting bracket 10 is made of an aluminum alloy shaped member having an H-shaped cross section, and is connected to the external force absorbing damper 20. The mounting block 10 is disposed so as to extend in the vertical direction. The height dimension of the mounting block 10 is the same as the height dimension of the external force absorbing damper 20 arranged in a plurality of stages (two stages) in the vertical direction. The web 11 a of the mounting bracket 10 extends along the surface of the frame-shaped frame composed of the base 2, the pillar 3, and the beam 4. One flange 11b of the mounting bracket 10 faces the external force absorbing damper 20, and the other flange 11b faces the column attachment 15 arranged on the column 3 side.

  A bolt insertion hole (not shown) is formed in the flange 11b. The flange 11b on the one side (external force absorbing damper 20 side) is joined to the side plate 21 with bolts and nuts in contact with the surface of the side plate 21 of the external force absorbing damper 20.

  The column attachment material 15 is a spacer connected to the column 3 and is made of an aluminum alloy shaped material having an H-shaped cross section. The column accessory 15 serves to fill the gap between the column 3 and the mounting bracket 10 and connect them. The column attachment material 15 extends in the vertical direction along the column 3.

  The web 16a of the column attachment material 15 extends along the surface of the frame-shaped frame. One flange 16 b of the column attachment 15 faces the column 3, and the other flange 16 b faces the mounting bracket 10. The dimension between the outer surfaces of the flanges 16 b and 16 b of the column attachment 15 is the same as the gap between the column 3 and the mounting bracket 10. In the present embodiment, the column attachment material 15 has the same shape and the same size as the mounting bracket 10, and the column attachment material 15 and the attachment bracket 10 are configured by a common member. The web 16a of the column attachment 15 and the web 11a of the mounting bracket 10 are arranged on the same plane.

  Bolt insertion holes (not shown) are formed in the flange 16b. One flange 16b (the column 3 side) is joined to the column 3 with a through bolt and a nut while being in contact with the side surface of the column 3. The column attachment material 15 is fixed to an intermediate portion in the height direction of the column 3. The flange 16b on the other side (external force absorbing damper 20 side) is joined to the mounting bracket 10 with bolts and nuts while being in contact with the flange 11b on the other side (column 3 side) of the mounting bracket 10.

  As shown in FIGS. 2 and 3, the external force absorbing damper 20 includes a pair of side plates 21, 21 and a plurality of ribs 22, 22. The external force absorbing damper 20 is made of a hollow extruded shape made of an aluminum alloy.

  The side plates 21 and 21 are arranged in parallel to each other at an interval in the lateral direction. The side plate 21 is formed in a flat plate shape and has a rectangular shape in a side view. The pair of side plates 21 and 21 have the same shape. At the upper end of the side plate 21, an upper connecting plate 23a that connects the upper portions of the side plates 21 and 21 is provided. The upper connecting plate 23 a is formed in a flat plate shape and is orthogonal to the side plate 21. The upper connecting plate 23 a is bridged between the side plates 21 and 21 at a position lower than the upper end of the side plate 21 by a predetermined distance. The upper connecting plate 23a may be provided at the upper ends of the side plates 21 and 21. A lower connection plate 23 b that connects lower portions of the side plates 21 and 21 is provided at the lower end portion of the side plate 21. The lower connecting plate 23b is formed in a flat plate shape, and is orthogonal to the side plate 21 and parallel to the upper connecting plate 23a. The lower connecting plate 23b is bridged between the side plates 21 and 21 at a position a predetermined distance higher than the lower ends of the side plates 21 and 21. The lower connecting plate 23b may be provided at the lower end of the side plate 21. Since the upper connecting plate 23a and the lower connecting plate 23b are provided, the distance between the side plates 21 and 21 can be maintained. Can be prevented.

  The rib 22 is spanned between the pair of side plates 21 and 21 and can be deformed according to an external force applied to the building. The rib 22 is disposed between the upper connecting plate 23a and the lower connecting plate 23b. A plurality of ribs 22 are provided at intervals in the vertical direction. The plurality of ribs 22, 22... Define a plurality of hollow portions 24 together with the side plates 21, 21 on both sides. The rib 22 extends along the separating direction of the side plates 21 and 21. The rib 22 has a corrugated shape that is vertically curved. By making the ribs 22 corrugated, the entire ribs 22 are plastically deformed, so that the vibration energy absorption efficiency during an earthquake is improved. The connection position between one end of the rib 22 and the one side plate 21 and the connection position between the other end of the rib 22 and the other side plate 21 are shifted in the vertical direction. Thus, the rib 22 is easily deformed by shifting the connecting position between the rib 22 and the side plate 21 in the vertical direction.

  An end portion 25 in the extruding direction of the side plate 21 (an end portion in the left-right direction in FIG. 2B) extends outward in the extruding direction from the edge of the rib 22 in the extruding direction. The length of the rib 22 in the extrusion direction is smaller than the length of the side plate 21 in the extrusion direction. Further, the length of the rib 22 in the extrusion direction is equal to the width dimension of the flange 11 b of the mounting bracket 10. The end portion 25 in the extrusion direction of the side plate 21 serves as a flange when the external force absorbing dampers 20 and 20 are joined together. The length of the side plate 21 in the extrusion direction may be equal to the width dimension of the flange 11b of the mounting bracket 10. In this case, the length of the rib 22 in the pushing direction is smaller than the width dimension of the flange 11b of the mounting bracket 10. Both bolt through holes 26 and 27 described later are used for joining the mounting bracket 10 and the external force absorbing damper 20.

  A bolt insertion hole 26 is formed in the end portion 25 of the side plate 21. The bolt insertion hole 26 is used when the external force absorbing dampers 20 and 20 are connected to each other. The bolt insertion holes 26 are provided at equal intervals in the vertical direction, and are formed at intermediate heights of the gaps between the ribs 22 and 22 arranged in the vertical direction.

  Bolt insertion holes 27 are also formed in the inner side of the side plate 21 in the extrusion direction. The bolt insertion hole 27 is used when the external force absorbing damper 20 and the mounting bracket 10 are connected. The bolt insertion holes 27 are provided at equal intervals in the vertical direction, and are formed at intermediate heights of the gaps between the ribs 22 and 22 arranged in the vertical direction. The bolt insertion hole 27 is formed at the same height as the bolt insertion hole 26.

  Note that the height positions of the bolt insertion holes 26 and 27 are not limited to the above positions. As long as the bolts and nuts do not interfere with the rib 22, the upper connecting plate 23a, or the lower connecting plate 23b, the bolt insertion holes 26 and 27 may be formed at other height positions.

  The external force absorbing dampers 20 are provided in a plurality (four in this embodiment), arranged in a plurality of rows (two rows) in the separating direction of the pillars 3 and 3, and arranged in a plurality of steps (two steps) in the vertical direction. Yes. The external force absorbing dampers 20 and 20 adjacent to each other in the lateral direction (the direction in which the columns 3 and 3 are separated) are connected by bolts and nuts that are inserted into the bolt insertion holes 26 of the end portions 25 of the side plates 21. The external force absorbing dampers 20 and 20 adjacent in the vertical direction are not directly fixed, but are connected via the mounting bracket 10. The fixing member for fixing each part is not limited to bolts and nuts, and other members such as screws and screws may be used. In this case, a female screw may be formed in the bolt through holes 26 and 27 and a screw or a screw may be screwed together. If a female screw is formed in the bolt through hole 27 opened between the ribs 22 and screwed with a screw or a screw, the bolt or nut does not enter the hollow portion 24, so that the tightening operation is easy.

  When forming the external force absorbing damper 20, the aluminum alloy hollow extruded section having the cross section is formed and cut at an appropriate length, and then the rib 22, the upper connecting plate 23a and the lower connecting plate at the end in the extrusion direction are formed. 23b is cut. Thereby, only the side plate 21 remains at the end portion in the extrusion direction, and this portion becomes the extended portion 25.

  According to the vibration control structure 5 as described above, when an external force is applied to the building due to the earthquake and the pillar 3 is deformed so as to be inclined (that is, the frame-like frame composed of the base 2, the pillar 3, and the beam 4 is sheared). When deformation occurs), an external force acts on the external force absorbing damper 20 via the mounting bracket 10. Specifically, a shearing force is applied to the external force absorbing damper 20, and one side plate 21 is pulled downward, and the other side plate 21 is pulled upward. The plurality of ribs 22 and 22 can be deformed to absorb vibration energy and attenuate.

  Since the external force absorbing damper 20 is connected to the flange 11b of the mounting bracket 10, the number of connections can be increased by increasing the area of the flange 11b. Furthermore, since the external force absorbing dampers 20 can be arranged in a plurality of rows in the separation direction (lateral direction) of the columns 3 and 3, the number of external force absorbing dampers 20 that can be installed in one vibration control structure 5 can be increased. . Furthermore, if the width of the flange 11b is increased, the length of the external force absorbing damper 20 in the extrusion direction can be increased, so that the vibration control performance can be improved. Thereby, since the large damping effect can be obtained in the damping structure 5 at one location, the number of installation locations of the damping structure 5 in the entire building can be reduced. Therefore, in a building, since the arrangement | positioning of a wall and the restriction | limiting of an opening part can be reduced, a design freedom can be raised.

  Since extended portions 25 are formed at both ends in the extrusion direction of the side plate 21 of the external force absorbing damper 20, it is easy to attach bolts and nuts and to easily join the external force absorbing dampers 20, 20 together. Can do. Moreover, since the extension part 25 serves as a reinforcing rib and the strength of the side plate 21 is increased, the strength of the external force absorbing damper 20 itself can be increased.

  Since the external force absorbing damper 20 is made of an aluminum alloy hollow extruded shape, the external force absorbing damper 20 can be reduced in weight and can have a highly accurate shape.

  Moreover, since the mounting bracket 10 and the column attachment material 15 are comprised by the cross-section H-shaped aluminum alloy shape material, the weight reduction of the damping structure 5 can be achieved. Furthermore, since adjacent brackets can be fixed with bolts and nuts via the flanges 11b and 16b, the joint strength between the mounting bracket 10 and the column attachment 15 can be increased.

  Furthermore, since the vibration control structure 5 is lightweight and can easily form each part, it can be constructed at low cost. Moreover, the joining operation | work of each part is also easy.

  Next, the vibration control structure according to the second embodiment of the present invention will be described in detail with reference to FIGS. The vibration control structure according to the second embodiment is applied to a two-by-four method (wooden framed wall structure).

  As shown in FIG. 4, in the two-by-four method, the wall panel 51 is formed by attaching a structural plywood 55 to a frame having a lower frame 52, vertical frames 53, 53 and an upper frame 54 assembled in a rectangular shape. Yes. The vibration control structure 105 is provided between the adjacent vertical frames 53 and 53, and includes a mounting bracket 10 and an external force absorbing damper 120. A column attachment material 115 is provided between the mounting bracket 10 and the vertical frame 53.

  In the vibration control structure 105 according to the second embodiment, the vertical length of the column attachment material 115 is larger than the vertical length of the mounting bracket 10. One flange 116 b of the column attachment material 115 is fixed to the vertical frame 53 with a through bolt and a nut while being in contact with the inner surface of the vertical frame 53. The width dimension of the flange 116b of the column attachment material 115 and the width dimension of the flange 11b of the mounting bracket 10 are equal to the depth dimension (width dimension of the inner side surface) of the vertical frame 53.

  The column attachment material 115 extends from the upper end portion to the lower end portion of the vertical frame 53, and is provided along the vertical frame 53. Clearances are provided between the upper frame 54 and the lower frame 52 above and below the column attachment material 115, respectively. This clearance is dimensioned such that when the wall panel 51 is deformed during an earthquake, the upper end of the pillar attachment material 115 does not interfere with the upper frame 54 and the lower end does not interfere with the lower frame 52. In this embodiment, the clearance dimension is calculated on the assumption that the inclination angle of the vertical frame 53 during an earthquake is 20 degrees. A plurality of bolt insertion holes (not shown) are formed in the flange 116 b that contacts the vertical frame 53. The bolt insertion holes are arranged at a predetermined interval from the upper end portion to the lower end portion of the flange 116b. In other words, the column attachment material 115 is fixed to the vertical frame 53 by a number of through bolts and nuts because of its large length.

  As shown in FIG. 5, in the external force absorbing damper 120, the length of the side plate 121 in the extrusion direction is equal to the length of the rib 22 in the extrusion direction. That is, no extending portion is formed at the end portion of the side plate 121 in the extrusion direction. The length of the side plate 121 in the extrusion direction is equal to the depth dimension of the vertical frame 53 (the width dimension of the inner surface).

  In addition, about other structures, such as the attachment bracket 10, since it is equivalent to the damping structure 5 of 1st embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  According to the vibration control structure 105, the column attachment material 115 extends along the substantially entire length of the vertical frame 53 and is fixed with a plurality of through bolts and nuts, so that the column attachment material 115 serves as a reinforcing member for the vertical frame 53. It can also serve the role of Since the vertical frame 53 of the two-by-four method has a smaller cross-sectional area than the column of the wooden frame construction method, the meaning of reinforcing the vertical frame 53 is great.

  Moreover, the wall to which the structural plywood 55 is affixed is obtained by making the length in the extrusion direction of the side plate 121 equal to the depth dimension of the vertical frame 53 without providing an extending portion at the end portion in the extrusion direction of the side plate 121. Even if it is the panel 51, the external force absorption damper 120 can be installed. That is, the external force absorbing damper 120 can be provided in the panel surface of the wall panel 51 without the side plate 121 interfering with the structural plywood 55.

  FIG. 6 illustrates a modification of the external force absorbing damper 120 of the second embodiment. In the external force absorbing damper 120a according to the modification, the upper and lower protruding portions of the side plate 121a are longer than the external force absorbing damper 120 of FIG. And the bolt through-hole 27 is formed in this protrusion part. The bolt through holes 27 are upper and lower projecting portions, and are formed in six horizontal rows and two upper and lower rows. The number of bolt through holes 27 is not limited to this. A bolt through hole is not formed in the intermediate portion in the height direction of the side plate 120a. In addition, about another structure, since it is equivalent to the external force absorption damper 120 shown in FIG. 5, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  According to such a configuration, the bolt that penetrates the bolt through hole 27 does not enter the hollow portion 24 sandwiched between the ribs 22, so that it is easy to perform bolt tightening work.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of this invention, a design change is possible suitably. For example, in the above-described embodiment, the mounting bracket 10 and the column attachment material 15 are made of an aluminum alloy shape material having an H-shaped section, but the shape is not limited to an H-shaped section, and the material is aluminum. It is not limited to alloys.

  In the above embodiment, the column attachment material 15 is provided between the mounting bracket 10 and the column 3. However, the attachment bracket 10 may be directly fixed to the column 3 without providing the column attachment material. In this case, the interval between the columns 3 and 3 is reduced or the lateral length of the mounting bracket is increased. In addition, it is preferable to reinforce the vertical frame 53 having a small cross-sectional area by providing the column attachment material 15 that is long in the vertical direction.

  Furthermore, in the said embodiment, although the rib 22 is exhibiting the waveform shape, it is not limited to this, For example, the shape from which planar shape, curved surface shape, or thickness changes may be sufficient. Further, in the embodiment, the ribs 22, 22,... Are provided between the upper connecting plate 23a and the lower connecting plate 23b of the side plate 21 of the external force absorbing damper 20, but the upper connecting plate 23a and the lower connecting plate 23b are provided. The side plates 21 and 21 may be connected only by the ribs 22, 22.

3 Pillar 5 Damping structure 10 Mounting bracket 15 Pillar accessory 20 External force absorbing damper 21 Side plate 22 Rib 53 Vertical frame (column)
105 Damping structure 115 Column attachment 120 External force absorbing damper 121 Side plate

Claims (4)

Between the adjacent columns, a vibration control structure is provided with an external force absorbing damper via a pair of mounting brackets,
The external force absorbing damper is made of a hollow extruded profile,
The hollow extruded profile comprises a pair of side plates arranged at intervals, and a plurality of ribs arranged between the pair of side plates,
The mounting bracket is provided between the pillars and extends along the pillars. The damping structure according to claim 1, wherein the external force absorbing dampers are arranged in a plurality of rows in the separation direction of the columns and in a plurality of stages in the vertical direction. The damping structure according to claim 1 or 2, wherein an end portion of the side plate in the extrusion direction extends outward in an extrusion direction from an edge of the rib in the extrusion direction. Between the column and the mounting bracket, a column attachment extending along the column is provided,
The mounting bracket is made of an aluminum alloy shaped member having an H-shaped cross section, and one flange is fixed in contact with the surface of the side plate,
The column attachment material is made of an aluminum alloy profile having an H-shaped cross section, and one flange is fixed in contact with the side surface of the column,
4. The vibration control structure according to claim 1, wherein the other flange of the mounting bracket and the other flange of the column attachment material are fixed in contact with each other. 5. .

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