JP2020070661A - Vibration control structure to building having column and beam - Google Patents

Abstract

To provide a vibration control structure to an existing building which facilitates carrying-in of a material, does not need to block an existing opening, and is comparatively low cost.SOLUTION: A vibration control structure 1 includes a column part 5 arranged between a first beam 3 of a lower layer and a second beam 4 of an upper layer, and a tendon 6 which vertically penetrates through the column part 5, the first beam 3 and the second beam 4. The column part 5 has a plurality of blocks 9 made of precast concrete, and a plurality of vibration control members 10 that are vertically and alternately stacked on the plurality of blocks. Shaking at the time of earthquake is attenuated by a friction force or deformation of the vibration control member 10.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a vibration control structure for a building having columns and beams.

  When reinforcing an existing building, it is desirable to construct it while securing a living space. Further, when concrete is poured on site, the construction equipment becomes large-scale and the site becomes dirty. Therefore, it is desirable to carry out dry construction. Even in a new building, it may be desirable to construct a dry reinforcement structure.

  Patent Documents 1 and 2 describe a structure in which dampers are installed in a stud manner. Patent Documents 3 and 4 describe a seismic reinforced structure including a wall in which concrete blocks are laid between columns and beams. Patent Document 5 describes a seismic retrofit structure including a wall made of a steel frame and a reinforcing block having a diagonal member, which is built between columns and beams. Patent Document 6 describes an earthquake-resistant wall and an earthquake-resistant stud that are formed by laminating steel plate blocks and fastened to each other with bolts.

JP, 2011-42929, A JP, 2016-166530, A JP, 2009-249865, A JP, 2018-35592, A JP, 2016-102363, A JP, 9-144374, A

  The vibration damping device used in the structures and the like described in Patent Documents 1 and 2 is large in size, heavy in weight, which requires time and effort for construction, and tends to increase input stress to the existing structure. There were problems such as the need for technical guidance.

  Since the structures described in Patent Documents 3 to 6 are formed by stacking blocks, it is easier to carry in the material than the structures described in Patent Documents 1 and 2. However, there are problems that it is difficult to construct the joint between the vibration control structure and the building frame, and that cracks may occur after the earthquake. Further, the structures described in Patent Documents 3 to 5 have a problem that it is necessary to close the existing opening, and the structure described in Patent Document 6 is constructed by fixing the laminated steel plate blocks to each other, but In order to obtain the anti-seismic performance or the vibration damping performance, a wall or a wide column is formed, and there is a problem that the existing opening is blocked to some extent and the material cost is increased.

  In view of such a problem, it is an object of the present invention to provide a vibration damping structure for a building, which is easy to carry in materials, does not need to close an opening, and has a relatively low cost. ..

  At least some embodiments of the present invention are a damping structure (1,41) for a building having columns (2) and beams (3,4), the lower end and the upper end of which are respectively arranged on the lower layer side. The first beam (3) and the second beam (4) arranged on the upper layer side, the column part (5, 42) arranged so as to abut, and the column part includes a plurality of blocks (9). And a plurality of damping members (10, 9a) vertically and alternately laminated on the plurality of blocks, and the plurality of blocks and the plurality of damping members are compression members (6, 44). ) Is subjected to a compressive force in the vertical direction.

  According to this structure, since the pillar portion is composed of a relatively small member such as a plurality of blocks and a plurality of vibration damping members, the member can be carried in manually. Further, since the compressive force is introduced, a sufficient damping force can be obtained even if the vibration damping structure is column-shaped instead of wall-shaped, the opening is not blocked, and the cost can be suppressed.

  The damping structure according to at least some embodiments of the present invention is characterized in that, in the above-mentioned configuration, the block is a precast concrete member.

  According to this structure, the cost of the block can be reduced because the material of the block is concrete, which is cheaper than steel.

  In the vibration damping structure according to at least some embodiments of the present invention, in the above structure, each of the vibration damping members (10) is made of at least two metal or resin materials which are vertically stacked and slidable with respect to each other. Having a plate (12, 13) for contacting with the block, the plate is fixed to the block, or the coefficient of static friction between at least two plates is greater than the coefficient of static friction between the plate and the block. Characterized by being small.

  According to this configuration, it is possible to reduce the shaking during an earthquake by the frictional force between the first plate and the second plate.

  The vibration damping structure according to at least some embodiments of the present invention is characterized in that, in the first or second configuration, each of the vibration damping members has a layered rubber (14).

  According to this configuration, it is possible to reduce the shaking during an earthquake due to the deformation of the rubber.

  In the vibration damping structure (1) according to at least some embodiments of the present invention, in any one of the above configurations, the pillar portion (5) has a pillar portion through hole (15) penetrating vertically, Each of the first beam and the second beam has a first through hole (16) and a second through hole (17) penetrating vertically and communicating with the column portion through hole, and the compression member is the It is characterized by having a tension member (6) inserted into the column portion through hole, the first through hole and the second through hole.

  According to this configuration, a compressive force is introduced into the column portion by the tension member, and the block and the vibration damping member are prevented from falling off because the tension member vertically penetrates the column portion.

  In the vibration damping structure according to at least some embodiments of the present invention, in the above-mentioned configuration, the pillar portion through holes are respectively arranged above and below the blocks (9a, 9b) arranged at the uppermost stage and the lowermost stage. It is characterized in that the diameter increases as it goes to.

  According to this structure, cutting of the tendons is suppressed by the enlarged through hole.

  In the vibration damping structure according to at least some embodiments of the present invention, in any one of the above configurations having a tension member, each of the blocks has a block hole (19) forming a part of the pillar portion through hole. And a wedge-shaped portion (26) fitted in the groove, and a main body portion (25) that has a groove (24) that opens up and down and extends from the side surface to the block hole, and the groove and the wedge-shaped portion. Is characterized in that the width on the side surface side is shorter than the width on the block hole side in plan view.

  According to this configuration, even when the tension member is arranged, the block can be arranged at the predetermined position and removed from the predetermined position by removing the wedge-shaped portion from the main body, so that the block can be easily replaced. Becomes

  In the vibration damping structure (41) according to at least some embodiments of the present invention, in any one of the first to fourth configurations described above, the compression member has a spring or a jack arranged in the column portion. Is characterized by.

  According to this structure, the construction is easier than the case where the tension member is used as the compression member.

  In the vibration damping structure according to at least some embodiments of the present invention, in any one of the above configurations, each of the blocks includes a recess (22) provided on one of an upper surface and a lower surface, and the other adjacent to each other. A convex portion (23) provided on the other of the upper surface and the lower surface so as to be loosely received in the concave portion of the block, and a side surface of the convex portion is locked to a side surface of the concave portion. (See Figure 7).

  According to this configuration, the protrusions are locked in the recesses, so that the blocks can be prevented from falling off, and the displacement of each block can be averaged.

  In the vibration damping structure according to at least some embodiments of the present invention, in place of the above configuration, each of the blocks includes a recess (22) provided on one of an upper surface and a lower surface, and the other blocks adjacent to each other. And a convex portion (23) provided on the other of the upper surface and the lower surface so as to be loosely received in the concave portion, the concave portion and the convex portion each have a curved surface convex in the protruding direction of the convex portion. (See FIG. 8).

  According to this configuration, since the convex portion slides into contact with the concave portion, the convex portion receives a force from the concave portion toward the center in a plan view, and thus a restoring force acts on the block. Further, the displacement of each block can be averaged.

  In the vibration damping structure according to at least some embodiments of the present invention, in any one of the above-described configurations, the column portion has an adjusting member (11, 43) for adjusting the length in the vertical direction, and the adjustment is performed. The member includes a bolt shaft portion (27a) extending in the lateral direction, a locking portion (27b, 45) provided at one end of the bolt shaft portion in the lateral direction, and the bolt shaft portion (27a). A nut (28) screwed to the other end in the lateral direction, a first member (29, 46) abutting the nut on the other surface in the lateral direction, and the lateral member with respect to the bolt shaft portion. A second member (30, 47) locked to the locking portion so that the movement of the first direction toward the one side is restricted, and the first member and the second member are arranged in the lateral direction. Inclined surfaces that incline vertically and make sliding contact with each other ( 9a, and having 30a, 46a, and 47a).

  According to this configuration, since the vertical length of the adjusting member can be adjusted, the upper end of the column portion can be brought into contact with the second beam without a gap.

  According to the present invention, it is possible to provide a vibration damping structure for an existing building, in which it is easy to carry in materials, it is not necessary to close the opening, and the cost is relatively low.

Front view of the vibration damping structure according to the first embodiment (normal time) Front view of the vibration control structure according to the first embodiment (during an earthquake) A perspective view showing a block and a damping member according to a first embodiment. Front view of the block and damping member according to the first embodiment (during an earthquake) The front view (at the time of an earthquake) which shows the block and the damping member which concern on the 1st modification of 1st Embodiment. FIG. 3 is a vertical cross-sectional view showing blocks arranged in the uppermost stage and the lowermost stage according to the first embodiment. A longitudinal section showing a block concerning the 2nd modification of a 1st embodiment. A longitudinal section showing a block concerning the 3rd modification of a 1st embodiment. A perspective view showing a block concerning a 4th modification of a 1st embodiment. The perspective view which shows the modification of the block which concerns on the 5th modification of 1st Embodiment. The front view which shows the adjustment member which concerns on 1st Embodiment. The perspective view which shows the 1st member and 2nd member of the adjustment member which concerns on 1st Embodiment. Front view of the vibration damping structure according to the second embodiment (normal time) The front view which shows the adjustment member which concerns on 2nd Embodiment. The perspective view which shows the compression member which concerns on 2nd Embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the vibration damping structure 1 according to the first embodiment has an existing structure including a pillar 2, a first beam 3, and a second beam 4 arranged in an upper layer of the first beam 3. Installed in the building. The vibration damping structure 1 has a column portion 5, two tension members 6 that function as compression members that compress the column portion 5, and a protective cap 7 that covers the upper end and the lower end of the tension member 6. As the tension member 6, a PC steel wire, a PC steel stranded wire, or the like can be used.

  The column portion 5 contacts the upper surface of the first beam 3 at the lower end and contacts the lower surface of the second beam 4 at the upper end. The pillar portion 5 includes a pedestal 8 placed on the upper surface of the first beam 3, a plurality of blocks 9, a plurality of vibration damping members 10 vertically and alternately stacked on the plurality of blocks 9, and a pillar portion. 5 and the adjusting member 11 arranged at the upper end portion. The pillar portion 5 is installed between two pillars 2 adjacent to each other, but the pillar portion 5 does not have to be at the center between the two pillars 2 and may be arranged at any intermediate position.

  The pedestal 8 is a member made of precast concrete and having a rectangular parallelepiped shape. The pedestal 8 preferably has a roughening or a wedge on the lower surface so as not to be displaced in the horizontal direction with respect to the first beam 3 during an earthquake.

  As shown in FIGS. 1 to 3, each block 9 is a member made of precast concrete and having a rectangular parallelepiped shape, and the contour in plan view matches the contour of the pedestal 8.

  As shown in FIGS. 3 and 4, each damping member 10 is mounted on the first plate 12 and a first plate 12 made of metal or high-strength resin mounted on the block 9. And a second plate 13 made of metal or high-strength resin on which the other block 9 is placed. In a plan view, the contours of the first plate 12 and the second plate 13 match the contour of the block 9 in normal times. The materials of the first plate 12 and the second plate 13 may be the same or different from each other. The first plate 12 and the second plate 13 have such strength that they can withstand the compressive force of the tendons 6. The coefficient of static friction between the first plate 12 and the second plate 13 is smaller than the coefficient of static friction between the first plate 12 and the block 9 and the coefficient of static friction between the second plate 13 and the block 9. Therefore, when a shearing force equal to or greater than the frictional force between the first plate 12 and the second plate 13 is applied to the pillar portion 5, as shown in FIG. , And the deviation occurs between the first plate 12 and the second plate 13 before the deviation occurs between the second plate 13 and the block 9 that contacts the upper surface thereof.

  Note that one or a plurality of plates (not shown) may be inserted between the first plate 12 and the second plate 13. It is preferable that the one or more plates have the same shape as the first plate 12 and the second plate 13 in a plan view. In this case, the first plate 12, one or a plurality of plates that are stacked on top of each other, and the second plate 13 are slidable with respect to each other, and the static friction coefficient thereof is the static friction coefficient between the first plate 12 and the block 9. Also, it is smaller than the coefficient of static friction between the second plate 13 and the block 9. Further, the first plate 12 and the second plate 13 may be fixed to the blocks 9 that are in contact with each other. For example, the second plate 13 and the first plate 12 may be embedded to manufacture the block 9 made of precast concrete, and the second plate 13 and the first plate 12 may be fixed to the block 9.

  As shown in FIG. 5, a layered rubber such as the high damping rubber 14 may be used as each damping member 10. In this case, the high damping rubber 14 is deformed to resist the shearing force.

  As shown in FIG. 1 and FIG. 2, the pillar portion 5 has two pillar portion through holes 15 penetrating vertically, and the first beam 3 and the second beam 4 respectively vertically penetrating the pillar portion. It has two first through holes 16 and a second through hole 17 that communicate with the through hole 15. The tension member 6 is inserted through the column portion through hole 15, the first through hole 16 and the second through hole 17, is fixed to the lower surface of the first beam 3 at the lower end portion, and is fixed to the upper surface of the second beam 4 at the upper end portion. Has been done. In addition, as shown in FIGS. 1 to 3, the pedestal 8, the block 9, the vibration damping member 10 and the adjusting member 11 respectively include two pedestal holes 18 and two blocks that form a part of the pillar portion through hole 15. The hole 19, two damping member holes 20, and two adjusting member holes 21 are provided. As shown in FIG. 6, the block holes 19 of the block 9a arranged at the uppermost stage and the block 9b arranged at the lowermost stage are expanded in diameter toward the upper side and the lower side, respectively. Even if the block 9a and the adjusting member 11 that are arranged and the block 9b and the pedestal 8 that are arranged at the lowermost stage are displaced from each other in the horizontal direction, the tension member 6 is difficult to be cut.

  7 to 10 show second to fifth modifications of the first embodiment, respectively, which differ from the above-described example mainly in the shape of the block 9. The block 9 according to the second modified example and the third modified example shown in FIGS. 7 and 8 has a concave portion 22 provided on the upper surface and a concave portion 22 of another block 9 that is adjacent to the lower portion via the vibration damping member 10. And a convex portion 23 provided on the lower surface thereof so as to be loosely received. The concave portion 22 and the convex portion 23 are located at the center of the block 9 in plan view. The vibration damping member 10 sandwiched between the upper and lower blocks 9 is bent by the convex portion 23 or is opened along the contour of the concave portion 22 in a plan view. The concave portion 22 may be provided on the lower surface of the block 9 and the convex portion 23 may be provided on the upper surface.

  In the second modification shown in FIG. 7, the convex portion 23 has a truncated pyramid shape or a truncated cone shape with a rectangular bottom surface, and the concave portion 22 has a truncated pyramid shape or a truncated cone shape having a contour larger than that of the convex portion 23 in plan view. Make a shape. When the two blocks 9 vertically adjacent to each other are displaced from each other in the horizontal direction, the side surface of the convex portion 23 is locked to the side surface of the concave portion 22 to prevent the block 9 from falling off. Further, since the friction coefficients between the first plate 12 and the second plate 13 do not completely match between the plurality of vibration damping members, the ones having smaller friction coefficients start to shift in order from each other, but the side surface of the convex portion 23 Is locked to the side surface of the concave portion 22, the displacement of each block 9 is averaged.

  In the third modification shown in FIG. 8, the convex portion 23 has a circular shape in a plan view and the surface has a convexly curved downward shape, for example, a spherical crown shape, and the concave portion 22 has a shape larger than that of the convex portion 23 in a planar view. It has a large circular contour, and the surface of the bowl is curved downward convexly. In the curved surface of the concave portion 22 and the curved surface of the convex portion 23 that can locally come into contact with each other, the convex portion 23 has a larger curvature at the local portion than the concave portion 22. When the two blocks 9 which are vertically adjacent to each other are displaced from each other in the horizontal direction, the convex portion 23 receiving the compressive force in the vertical direction returns from the curved surface of the concave portion 22 to the center which is the deepest portion of the concave portion 22. Due to the force, the block 9 has resilience performance. Further, the displacement of each block 9 can be averaged.

  In the fourth modified example shown in FIG. 9, the block 9 has a main body portion 25 having two grooves 24 that are vertically opened to reach the corresponding block hole 19 from the side surface, and a wedge-shaped portion 26 that is fitted into the groove 24. .. The two grooves are arranged parallel to each other. The width of the groove 24 and the wedge portion 26 on the side surface side of the block 9 is shorter than the width on the side of the block hole 19 in a plan view. Since the block 9 has the main body portion 25 and the wedge-shaped portion 26, the main body portion 25 is moved from the lateral direction to the predetermined position so that the tension material 6 is inserted into the groove 24 after the tension material 6 is arranged. By inserting the wedge-shaped portion 26 into the groove 24 from above, the block 9 can be arranged at a predetermined position. Therefore, when some blocks 9 are damaged, the damaged blocks 9 can be easily replaced.

  In the fifth modification shown in FIG. 10, the block 9 is a member made of metal. The blocks 9 are arranged at the H steel 31 and at both ends of the H steel 31, the upper edge and the lower edge contact the inside of the flange 31a of the H steel 31, and one side edge of the web 31b of the H steel 31. Four rectangular flat plate-shaped first rib plates 32 that come into contact with each other, and are arranged inside the first rib plate 32 in the extending direction of the H steel 31, and the upper edge and the lower edge are flanges of the H steel 31. The second flat rib plate 33 has four rectangular flat plates that are in contact with the inside of the steel plate 31a and one side edge of which is in contact with the web 31b of the H steel plate 31, and are arranged on both sides of the H steel plate 31 in the width direction. Two rectangular flat plate-shaped plates 34 whose upper and lower edges are in contact with the widthwise end edges of the flange 31a of the H steel 31, and both side edges are in contact with the other side edge of the second rib plate 33. Have. Block holes 19 are provided in the vicinity of both ends of the flange 31a of the H steel 31 so that the tension member 6 can be inserted between the first rib plate 32 and the second rib plate. The block 9 may be made of a resin member having the same shape.

  Since the surface of the flange 31a of the H steel 31 has more uniform coefficient of friction than the surface of the concrete, the flange 31a of the H steel 31 is used as the vibration damping member 10, and the web 31b of the H steel 31, the first rib plate 32, and the The block 9 may be a portion including the two-rib plate 33 and the plate 34. The same applies when the block 9 is a resin member.

  As shown in FIG. 11, the adjusting member 11 includes a bolt shaft portion 27a extending in the horizontal direction (a predetermined horizontal direction) and one end portion in the horizontal direction of the bolt shaft portion 27a (the left end portion in FIG. 11). ) Provided with a bolt head 27b that functions as a locking portion, a nut 28 screwed to the other lateral end of the bolt 27 (the right end in FIG. 11), and a lateral direction. The first member 29 that abuts the nut 28 on the other surface (right side in FIG. 11) and the movement toward one side (left side in FIG. 11) in the lateral direction with respect to the bolt shaft portion 27a are restricted. The second member 30 locked to the bolt head 27b. Each of the first member 29 and the second member 30 has a first inclined surface 29a and a second inclined surface 30a that are vertically inclined so as to form an angle with the lateral direction and are in sliding contact with each other. In the first member 29 and the second member 30, at least one of the first insertion hole 29b and the second insertion hole 30b, through which the bolt shaft portion 27a is inserted, is a long hole having a long axis in the vertical direction. Each of the first member 29 and the second member 30 has a trapezoidal shape in which the upper side and the lower side are the bottom side and one leg is perpendicular to the bottom side in a front view. The second member 30 preferably has a roughening or a wedge on its upper surface so as not to be displaced in the horizontal direction with respect to the second beam 4 during an earthquake.

  When the nut 28 is screwed, the first member 29 and the second member 30 are in sliding contact with each other, and the first member 29 moves diagonally downward leftward in FIG. 11 with respect to the second member 30. Therefore, the vertical length of the adjusting member 11 increases. Therefore, after the pedestal 8, the plurality of blocks 9 and the plurality of damping members 10 are stacked, the adjusting member 11 is inserted between the uppermost block 9a and the second beam 4 with the nut 28 screwed back. Then, by screwing the nut 28 thereafter, the gap between the adjusting member 11 and the second beam 4 can be eliminated.

  As shown in FIG. 12, a first hole 29c provided in the first member 29 and a second hole 30c provided in the second member 30, which form the adjustment member hole 21, are the first member 29 and the second member. The width in the lateral direction is larger than that of the block hole 19 and the vibration damping member hole 20 (see FIG. 3) so that they can communicate with each other even if the relative positions of the members 30 are displaced from each other.

  The effects of the vibration damping structure 1 according to the first embodiment will be described. By tensioning the tension member 6, the column portion 5 receives a compressive force in the vertical direction. This compressive force causes a frictional force between the first plate 12 and the second plate 13, and the frictional force damps the shaking during an earthquake. The coefficient of friction between the blocks 9 or the coefficient of friction between the first plate 12 or the second plate 13 and the block 9 varies greatly because concrete is a mixture of cement and aggregate. Compared to these, the friction coefficient between the first plate 12 and the second plate 13 made of metal or resin has a small variation, and therefore each vibration damping member 10 is likely to be displaced during an earthquake and is easy to design. Further, the tension of the tension member 6 contributes to the restoring force. In addition, since the compressive force is applied by the tension member 6, even with the columnar vibration damping structure 1, sufficient damping force can be obtained and the opening of the existing building is not closed. When the high damping rubber 14 (see FIG. 5) is used as the damping member 10 as in the first modification, the deformation of the high damping rubber 14 damps the shaking during an earthquake.

  Since the pillar portion 5 can be divided into the pedestal 8, the block 9, the damping member 10 and the adjusting member 11 and transported to the installation site, these can be transported manually and can be easily carried into the existing building indoors. .. Moreover, the weight of each member is light, and the transportability and the workability of constructing the pillar portion are good. In addition, the construction difficulty is lower than that of the conventional damping structure using dampers. Since concrete, which is cheaper than steel, is used as the block 9, the cost can be suppressed.

  A vibration damping structure 41 according to the second embodiment will be described with reference to FIGS. 13 to 15. In the description, the configuration common to the first embodiment will be omitted and the same reference numerals will be given. The vibration damping structure 41 according to the second embodiment differs from that of the first embodiment in the means for compressing the column portion 42 and the like.

  As shown in FIG. 13, the vibration damping structure 41 has a column portion 42 that abuts the upper surface of the first beam 3 at the lower end and abuts the lower surface of the second beam 4 at the upper end. The column portion 42 includes a pedestal 8 placed on the upper surface of the first beam 3, a plurality of blocks 9, a plurality of vibration damping members 10 vertically and alternately stacked on the plurality of blocks 9, and a column portion. 5 has an adjusting member 43 arranged at the upper end thereof, and a compression member 44 arranged between the block 9a arranged at the uppermost stage and the adjusting member 43. The pedestal 8, the block 9 and the damping member 10 have the same configuration as that of the first embodiment, except that no hole for inserting the tension member 6 (see FIG. 1) is provided.

  As shown in FIG. 14, the adjusting member 43 includes a bolt shaft portion 27a extending in the lateral direction and a bolt head provided at one lateral end portion (the left end portion in FIG. 14) of the bolt shaft portion 27a. A bolt 27 having a portion 27b, a nut 28 screwed to the other lateral end portion of the bolt 27 (the right end portion in FIG. 14), and a through hole 45a in which the bolt shaft portion 27a is inserted are provided. , A plate-shaped locking member 45 such as a steel plate locked to the bolt head 27b so that movement toward one side in the lateral direction (leftward in FIG. 14) with respect to the bolt shaft portion 27a is restricted; The first member 46 that abuts the nut 28 on the other surface (right side in FIG. 14) of the direction, and one side in the lateral direction (left side in FIG. 14) with respect to the bolt shaft portion 27a above the bolt shaft portion 27a. Move toward The second member 47 locked to the locking member 45 and the movement of the second member 47 laterally below the bolt shaft portion 27a (leftward in FIG. 14) with respect to the bolt shaft portion 27a are restricted. And a third member 48 locked to the locking member 45 as described above.

  Each of the first member 46 and the second member 47 has a first upper inclined surface 46a and a second inclined surface 47a that are vertically inclined so as to form an angle with the lateral direction and are in sliding contact with each other. Similarly, the first member 46 and the third member 48 each have a first lower sloping surface 46b and a third sloping surface 48a that are vertically inclined so as to form an angle with the lateral direction and are in sliding contact with each other. The first member 46 has a trapezoidal shape when viewed from the front, a side on the lateral bolt head 27b side has a short base, a side on the lateral nut 28 side has a long base, and a short base and two legs are provided. The angle formed is obtuse. The first member 46 also has an insertion hole 46c through which the bolt shaft portion 27a is inserted. The second member 47 has a right triangle shape in which the upper side and the side on the side of the bolt head 27b in the lateral direction form a right angle. The third member 48 is in the shape of a right triangle in which the lower side and the side on the bolt head 27b side in the lateral direction form a right angle.

  When the nut 28 is screwed, the first member 46 moves to the left in FIG. At this time, since the second member 47 and the third member 48 are locked by the locking member 45, the second inclined surface 47a is in sliding contact with the first upper inclined surface 46a, and the third inclined surface 48a is the first. 1 By slidingly contacting the lower inclined surface 46b, it moves so as to be vertically separated. Therefore, the vertical length of the adjusting member 43 increases. Therefore, after the pedestal 8, the plurality of blocks 9, the plurality of damping members 10 and the compression member 44 are stacked, the adjusting member 43 is moved to the uppermost block 9a and the compression member 44 with the nut 28 screwed back. The gap between the adjusting member 43 and the second beam 4 can be eliminated by inserting it between the beam 4 and the nut 28 and then threading the nut 28.

  As shown in FIG. 15, the compression member 44 is arranged in a recess 49 provided in the upper surface of the block 9a arranged in the uppermost stage. Further, it is preferable that a recess (not shown) that receives the compression member 44 is also provided on the lower surface of the adjustment member 43. The compression member 44 includes a spring such as a disc spring that exerts a spring force in the vertical direction, or a jack such as a flat jack that expands and contracts in the vertical direction. After adjusting the height of the adjusting member 43 to eliminate the gap between the adjusting member 43 and the second beam 4, the spring force is released or the jack is extended to move the compression member 44 to the upper surface of the block 9a and the adjusting member. A compressive force is introduced into the column portion 42 by pressing it against the lower surface of 43.

  The vibration damping structure 41 according to the second embodiment also has the same effects as the first embodiment. Further, compared with the first embodiment, since there is no step of tensioning the tension member 6 (see FIG. 1), the construction difficulty of the vibration damping structure 41 is further low. Further, as compared with the first embodiment, since the tension member does not penetrate the column portion 42, the block 9 and the vibration damping member 10 can be easily replaced.

  Although the specific embodiment has been described above, the present invention is not limited to the above embodiment and can be widely modified and implemented. You may arrange | position an adjustment member in the intermediate part of a pillar part. In this case, it is preferable that the upper surface and the lower surface of the adjusting member contact the block or the pedestal. In the first embodiment, the tension material may be changed to one or three or more. The shape of the vibration damping member of the first modification of the first embodiment and the block of the second modification or the third modification may be applied to the second embodiment. The first modified example, the second modified example or the third modified example, and the fourth modified example of the first embodiment may be combined with each other. The adjusting member of the first embodiment may be applied to the second embodiment, and the adjusting member of the second embodiment may be applied to the first embodiment. In the first embodiment, a plurality of pillars arranged in vertically adjacent layers may be compressed by a common tension member. The present invention may be applied to a new building.

1, 41: Damping structure 2: Column 3: First beam 4: Second beam 5, 42: Column part 6: Tension material (compression member)
9: Block 10: Damping member 11, 43: Adjusting member 12: First plate 13: Second plate 14: High damping rubber 22: Recessed portion 23: Convex portion 24: Groove 25: Main body portion 26: Wedge portion 27: Bolt 27a: bolt shaft portion 27b: bolt head portion (locking portion)
28: Nuts 29, 46: First member 29a: First inclined surface (inclined surface)
46a: First upper inclined surface (inclined surface)
30, 47: Second member 30a, 47a: Second inclined surface (inclined surface)
44: Compression member 45: Locking member (locking part)

Claims (11)

A damping structure for a building having columns and beams,
The lower end and the upper end respectively have pillar portions arranged so as to abut on the first beam arranged on the lower layer side and the second beam arranged on the upper layer side,
The pillar portion has a plurality of blocks, and a plurality of vibration damping members that are vertically and alternately stacked with respect to the plurality of blocks,
A vibration damping structure, wherein the plurality of blocks and the plurality of vibration damping members receive a compressive force in a vertical direction by a compression member.   The damping structure according to claim 1, wherein the block is a precast concrete member. Each of the vibration damping members includes at least two metal or resin plates that are vertically stacked and slidable with respect to each other,
The plate contacting the block is fixed to the block, or the coefficient of static friction between at least two plates is smaller than the coefficient of static friction between the plate and the block. Vibration control structure.   The damping structure according to claim 1 or 2, wherein each of the damping members has a layered rubber. The pillar portion has a pillar portion through hole that vertically penetrates,
The first beam and the second beam each have a first through hole and a second through hole that penetrate vertically and communicate with the pillar through hole,
The vibration damping device according to any one of claims 1 to 4, wherein the compression member includes a tension member that is inserted into the pillar portion through hole, the first through hole, and the second through hole. Construction.   The vibration damping structure according to claim 5, wherein the pillar-shaped through-holes have diameters that increase in an upward direction and a downward direction in the blocks arranged in the uppermost stage and the lowermost stage, respectively. Each of the blocks has a block hole that constitutes a part of the pillar through hole, a main body portion having a groove that opens vertically and extends from a side surface to the block hole, and a wedge-shaped portion that fits in the groove. Has and
7. The vibration damping structure according to claim 5, wherein the groove and the wedge-shaped portion have a width on the side surface side shorter than a width on the block hole side in plan view.   The vibration damping structure according to claim 1, wherein the compression member has a spring or a jack arranged in the column portion. Each of the blocks has a concave portion provided on one of the upper surface and the lower surface, and a convex portion provided on the other of the upper surface and the lower surface so as to be loosely received in the concave portions of the other adjacent blocks. ,
9. The vibration damping structure according to claim 1, wherein a side surface of the convex portion is locked to a side surface of the concave portion. Each of the blocks has a concave portion provided on one of the upper surface and the lower surface, and a convex portion provided on the other of the upper surface and the lower surface so as to be loosely received in the concave portions of the other adjacent blocks. ,
The damping structure according to claim 1, wherein the concave portion and the convex portion each have a curved surface that is convex in a protruding direction of the convex portion. The pillar portion has an adjusting member for adjusting the length in the vertical direction,
The adjusting member is
A bolt shank extending in the lateral direction,
An engaging portion provided at one end of the bolt shaft portion in the lateral direction,
A nut screwed to the other end of the bolt shaft portion in the lateral direction,
A first member that abuts the nut on the other surface in the lateral direction;
A second member locked to the locking part so as to restrict movement toward the one side in the lateral direction with respect to the bolt shaft part,
11. The first member and the second member each have an inclined surface that is vertically inclined so as to form an angle with the lateral direction and slidably contact with each other, according to any one of claims 1 to 10. Damping structure described.

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