JP5541728B2 - Damping structure of wooden buildings - Google Patents

Description

The present invention relates to a vibration control structure of a wooden building mainly applied to a wooden house, particularly a wooden house of a conventional frame construction method.

  Structural vibration control technology began with the introduction of large-scale buildings for offices, etc., and recently combined with the need to improve residential comfort and earthquake safety, it has become a detached wooden house. Has also been introduced.

  The main damping technology used in detached wooden houses is to place a damper in the building that absorbs and attenuates vibration energy, thereby converging the shaking of the building due to seismic motion. There are various types such as elastic-plastic dampers using yield point steel, viscous dampers using silicon, oil dampers, friction dampers, etc., and they are properly used according to the seismic motion, building scale, or vibration characteristics.

  Regardless of which damper is used, in order to converge the shaking of the building due to the earthquake motion, it is necessary to bridge the damper between the members that have caused the relative displacement due to the shaking of the building. The larger it is, the easier it is to control the shaking of the entire building.

  Therefore, a typical example is a configuration in which the damper is installed such that an interlayer displacement, that is, a relative displacement generated between the upper and lower horizontal members is input.

JP 2010-203164 A JP 2009-024435 A JP 2008-308906 A

  However, when installing a damper between upper and lower horizontal members, the space surrounded by the rectangular frame consisting of pillar beams is inevitably occupied by the damper and the brace or connecting plate that connects the damper to the rectangular frame. If there is no problem if it can be closed as a wall, there will be no problem. However, if you want to secure a large indoor space or secure ventilation and lighting, the damper installation location will be a wall. It is difficult to stand up, and to provide an opening for securing a large space, ventilation or lighting.

  Of course, if the horizontal member for mounting the damper is separately bridged inside the rectangular frame made of column beams, and the damper is installed in the upper space and hidden by the ceiling, the remaining space can be used as an opening. The relative displacement input to the damper is reduced by the ratio of the ceiling height to the floor height, and the vibration control effect is greatly reduced.

  In addition, an installation form is known in which a damper is installed at the joint of the column beam so that the relative rotation angle of the column beam is input. According to such an installation form, the four corners of the wall space are occupied. Therefore, an opening can be secured at the center of the rectangular frame, and the dampers installed at the four corners can be concealed by the ceiling or floorboard, so that the aesthetics of the living room can be maintained.

  However, there is a limit to taking out the shaking of the building due to earthquake motion in the form of the relative rotation angle of the column beam at the joint, and the installation of a damper with a large damping force in a slight corner space near the joint itself, In the first place, it is difficult to expect a great vibration control effect.

The present invention has been made in consideration of the above-mentioned circumstances, and the inner space of the rectangular frame surrounded by the column beam is not occupied by the damper, and the shaking of the building due to the earthquake motion can be converged in a short time. An object is to provide a possible vibration control structure of a wooden building .

In order to achieve the above object, a vibration damping structure for a wooden building according to the present invention includes an oil damper, a cylinder side connecting portion to which a cylinder constituting the oil damper is pin-joined, and The piston-side coupling part with the piston rod that is pin-bonded to the oil damper, and the pair of pillars that constitute the wooden frame member and are arranged opposite to each other, can be fixed to the opposite side of one pillar at the edge. The cylinder side displacement transmitting plate to which the cylinder side connecting portion can be attached at the opposite edge, and the piston side connecting portion at the opposite edge can be fixed to the opposite side surface of the other column. A vibration damping device comprising a piston-side displacement transmission plate which can be freely attached. The vibration damping device includes the pair of columns, the upper horizontal members spanned on the tops thereof, and the legs thereof. Out of the inner space of the rectangular frame made of the lower horizontal member, it is arranged so that the installation region is directly below the upper horizontal member, directly above the lower horizontal member or near the middle height of the pair of columns, And the cylinder side displacement transmission plate and the piston side displacement transmission plate are respectively arranged on the opposing side surfaces of the pair of columns so that the region excluding the installation region of the inner space of the rectangular frame is a rectangular opening. A pair of rectangular frames fixed to each other and having the width of the inner dimension of the pair of columns are opposed to the pair of columns in a state where the cylinder-side displacement transmission plate and the piston-side displacement transmission plate are sandwiched therebetween. Each is fixed to the side .

  Further, in the vibration control structure for a wooden building according to the present invention, the installation area is directly below the upper horizontal member and directly above the ceiling installed below the upper horizontal member. The opening sandwiched between the floor boards provided is the rectangular opening, and the opening is an opening that can be moved between adjacent living rooms.

  Further, in the vibration control structure of a wooden building according to the present invention, the installation area is directly below the upper horizontal member and directly above the lower horizontal member, and an opening sandwiched between them is the rectangular opening. A waist window is fitted into the opening.

  Further, in the vibration control structure for a wooden building according to the present invention, the installation area is directly above the lower horizontal member, and an opening extending directly below the upper horizontal member is the rectangular opening. It is fitted with high windows.

  Further, in the vibration control structure for a wooden building according to the present invention, the installation area is in the vicinity of an intermediate height between the pair of pillars, and an opening extending directly below the upper horizontal member and directly above the lower horizontal member. Each of the expanding openings is the rectangular opening, and a high window and a ground window are fitted into the openings.

  The vibration control structure for a wooden building according to the present invention is a wooden building constructed by a conventional frame construction method.

  Although many vibration control technologies have been developed or proposed for wooden buildings, most of them have dampers and related members arranged so as to almost occupy the entire inner space of the rectangular frame surrounded by column beams. It has a structure.

  This is because the damper is arranged near the center of the rectangular frame, and the damper is connected to the upper and lower horizontal members, respectively, so that the interlayer displacement, that is, the relative displacement generated between the upper and lower horizontal members is input to the damper. As a result, the entire inner space of the rectangular frame is almost occupied by the vibration control device, ensuring lighting and ventilation, or leaving an opening that allows people to come and go without compromising aesthetics. It becomes difficult.

  On the other hand, as in Patent Document 2, there are some techniques in which the relative displacement between a pair of opposing columns is input to the damper. However, the damper is arranged near the center of the rectangular frame, and the damper is moved to the left and right. It is the same as the above-mentioned interlayer displacement type in the sense that it is connected to each of the pillars, and the entire inner space of the rectangular frame is occupied by the damper and related members, so that an opening that can be used for the above-described applications is provided. It is still difficult to leave the space inside the rectangular frame.

  In addition, as with the vibration damping device described in Patent Document 2, the use of a viscous damper facilitates downsizing, but in order to increase the overall damping force, multiple installations are indispensable. There are many things that are responsible for occupying the inner space.

  Further, as described above, it is difficult to achieve sufficient vibration suppression using a column beam or a relative rotation angle between the column and the base generated in the joint (Patent Document 1).

  Incidentally, Patent Document 3 is a few documents that disclose an invention that can leave an opening that allows people to move between adjacent living rooms, but uses the relative rotation angle between the pillar and the base in the joint. Because of this, it is still impossible to expect sufficient vibration suppression.

  Based on such knowledge, the present applicants have made the present invention as a result of research and development of a technology that can ensure sufficient lighting and ventilation, or can maintain sufficient vibration while leaving an opening where people can come and go. Is.

That is, in the vibration damping structure for a wooden building according to the present invention, the cylinder side displacement transmission plate constituting the vibration damping device is disposed on the opposite side surface of one column at the edge, and the piston side displacement transmission plate is disposed on the other side at the edge. The cylinder side connecting part, which is fixed to the opposite side surfaces of the cylinder and pinned to the cylinder of the oil damper that constitutes the vibration damping device, is connected to the opposite edge of the cylinder side displacement transmission plate, and the piston rod of the oil damper is pinned The joined piston side connecting portions are respectively attached to opposite side edge portions of the piston side displacement transmission plate.

  In this way, when the pair of columns tilts to the left and right according to the shaking of the entire building, the cylinder-side displacement transmission plate and the piston-side displacement transmission plate rotate due to the tilt, and the column shaft is between them. Relative displacement along is produced. The oil damper to which the relative displacement is input exerts its damping force to quickly converge the shaking of the building.

  In particular, in wooden buildings constructed with the conventional frame construction method, the degree of joint (rotational rigidity) between the column and the horizontal member is relatively small. Inclined to.

  Therefore, although the relative displacement input to the oil damper is smaller than the interlayer displacement, it can be reduced to a level that can be sufficiently compensated by the damping capacity of the oil damper, thus converging the shaking of the building in a short time. it can.

Further, since the vibration damping device used in the present invention is configured as described above, the height required for installation can be suppressed, and the inner space of the rectangular frame is the vibration damping device as in the conventional vibration damping device. And will not be occupied by related components.

  Therefore, in the inner space of the rectangular frame, arrange the vibration damping device so that the installation area is directly below the upper horizontal member, directly above the lower horizontal member, or near the middle height of the pair of columns. A configuration in which the area to be removed is a rectangular opening is possible.

  And according to this structure, it becomes possible to make the rectangular-shaped opening left in the rectangular frame as an area | region except the installation area | region of a damping device into an opening for lighting and ventilation, and obtains high comfortability In addition, as an opening for people to go back and forth, it is also possible to form a large space by integrating the adjacent living rooms by continuously forming the opening in the room.

In the relationship between the installation area of the vibration damping device in the rectangular frame and the rectangular opening left in the rectangular frame, the following specific configuration, that is,
(a) The installation area is directly below the upper horizontal member and directly above the ceiling installed below the upper horizontal member, and the opening sandwiched between the ceiling and the floor plate provided below is rectangular. And the opening can be moved between adjacent rooms.
(b) The installation area is directly below the upper horizontal member and directly above the lower horizontal member, and the opening sandwiched between them is a rectangular opening, and a waist window is fitted into the opening.
(c) The installation area of the vibration control device is directly above the lower horizontal member, and the opening extending directly below the upper horizontal member is a rectangular opening, and a high window is fitted into the opening.
(d) The installation area of the vibration damping device is in the vicinity of the middle height of the pair of pillars, and the opening extending just below the upper horizontal member and the opening extending just above the lower horizontal member are each rectangular openings, It is possible to employ a configuration in which a high window and a ground window are fitted into the opening.

  Among such specific configurations, (a) is to install a vibration damping device in the ceiling space, so that a rectangular opening is formed between the ceiling and the floorboard, and adjacent living rooms are integrated through the opening. A large space can be formed.

  In (b), the standard lighting and ventilation can be secured by the waist window, and the degree of contribution to damping can be increased by the damping device arranged in two stages above and below.

  In addition, (c) is a configuration that can be used mainly on the outer wall facing the living room where privacy is to be secured. The lower part of the outer wall is used as a space for vibration control, while the upper part is used as an opening for daylighting. As a result, it is possible to block the line of sight from the outside while contributing to vibration suppression of the entire building, and to ensure high quality lighting unique to the so-called high side light.

  (D) shows that the building is constructed by fitting the high window and the ground window into the rectangular openings left above and below, while using the middle height position of the pillar as a space for vibration control. While contributing to the overall vibration control, it is possible to secure high-quality lighting unique to so-called high-side lights and ventilation unique to the ground window while blocking the line of sight from the outdoors.

  The cylinder-side displacement transmission plate and the piston-side displacement transmission plate are preferably each composed of a plate material with high in-plane rigidity, such as a structural plywood, so that it can sufficiently resist the in-plane shear force generated during an earthquake.

  In addition, the cylinder side displacement transmission plate and the piston side displacement transmission plate are arranged so that a clearance is formed between the upper side horizontal member and the lower side of the upper side horizontal member when the vibration damping device is disposed directly below the upper side horizontal member. In the case of being arranged directly above the lower horizontal member, the horizontal member is attached to the opposing side surfaces of the pair of columns so that a clearance is formed between the upper member and the lower horizontal member. Try to avoid interference.

In the vibration control structure for a wooden building according to the present invention, a cylinder side displacement transmission plate and a piston side displacement transmission plate are sandwiched between a pair of rectangular frames whose width is the inner dimension of the pair of columns. In this state , the cylinder side displacement transmission plate and the piston side displacement transmission plate can be prevented from buckling in the out-of-plane direction in the event of an earthquake. it can.

The front view of the damping structure of the wooden building which concerns on this embodiment. The front view of the vibration damping device which concerns on this embodiment. The figure which showed the effect | action of the damping device which concerns on this embodiment, and the damping structure of a wooden building using the same. The whole front view which showed the damping structure of the wooden building which concerns on a modification. The whole front view which showed the damping structure of the wooden building which concerns on another modification. The whole front view which showed the damping structure of the wooden building which concerns on another modification. It is the figure which showed the damping structure of the wooden building which concerns on another modification, (a) is a front view, (b) is a vertical sectional view which follows the AA line. The front view of the test body produced in order to perform a dynamic force test. The graph which showed the result of the dynamic force test.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a vibration control structure for a wooden building according to the present invention will be described with reference to the accompanying drawings. Note that components that are substantially the same as those of the prior art are assigned the same reference numerals, and descriptions thereof are omitted.

  FIG. 1 is a front view showing a vibration control structure of a wooden building according to the present embodiment, and FIG. 2 is a front view of a vibration control device used therefor. As shown in these drawings, the vibration damping structure 1 for a wooden building according to the present embodiment is a rectangular building standing on the first floor of such a wooden house, where the wooden house constructed by the conventional frame construction method is a wooden building. A vibration damping device 6 is arranged in the inner space of the frame 5.

  The rectangular frame 5 includes a base 4 as a lower horizontal member mounted on a reinforced concrete cloth foundation (not shown), a pair of pillars 2 and 2 erected on the base 4, and tops thereof. It consists of a beam 3 as an upper horizontal member that is bridged.

  As can be seen from FIG. 2, the vibration damping device 6 has an oil damper 21, a cylinder side connecting portion 32 to which a cylinder 22 constituting the oil damper is pin-joined, and a piston rod 23 constituting the oil damper 21 being pin-joined. Of the pair of columns 2 and 2, the cylinder side displacement transmission plate 26 fixed to the opposite side surface of one column 2 and the piston side displacement fixed to the opposite side surface of the other column 2. The transmission plate 30 is generally configured.

  The cylinder side displacement transmission plate 26 is fixed to one column 2 via an angle 27 having an L-shaped cross section, and the opposite side edge of the cylinder side displacement transmission plate 26 constitutes a cylinder side connecting portion 32. It is fixed to the cylinder side connecting portion by inserting the screw into the screw holes formed on both side surfaces of the connecting main body and screwing the screw into the connecting main body 25 having a letter-shaped cross section.

  In addition, the connecting body 25 is provided with a bracket 24 that forms a cylinder side connecting portion 32 together with the connecting body, and the cylinder 22 of the oil damper 21 is pin-joined to the end of the bracket.

  Similarly, the piston-side displacement transmitting plate 30 is fixed to the other column 2 via an angle 31 having an L-shaped cross section, and the piston-side connecting portion 33 is connected to the opposite edge. It is fixed to the piston-side connecting portion by being inserted into a connecting body 29 having a U-shaped cross section and being screwed into a screw hole formed on both side surfaces of the connecting body.

  In addition, a bracket 28 that constitutes the piston-side connecting portion 33 together with the connecting body protrudes from the connecting body 29, and the piston rod 23 of the oil damper 21 is pin-joined to the tip of the bracket.

  Here, the cylinder-side displacement transmission plate 26 and the piston-side displacement transmission plate 30 include a ceiling 7 in which the vibration damping device 6 is installed in the inner space of the rectangular frame 5 directly below the beam 3 and below the beam. The rectangular opening 9 sandwiched between the ceiling 7 and the floor board 8 provided below the ceiling 7 is located between the adjacent living rooms so that the space behind the ceiling becomes the installation area and the area other than the installation area. Are fixed to the opposite side surfaces of the pair of pillars 2 and 2 so as to provide an opening that can be moved back and forth.

  The cylinder-side displacement transmission plate 26 and the piston-side displacement transmission plate 30 are each composed of a plate material with high in-plane rigidity, for example, a structural plywood, so that it can sufficiently resist the in-plane shear force generated during an earthquake. In order to avoid interference with each other, they are attached to the opposite side surfaces of the pair of columns 2 and 2 so that a clearance δ is formed between the lower surface of the beam 3.

  In the vibration damping device 6 according to this embodiment and the vibration damping structure 1 of a wooden building using the same, the cylinder side displacement transmission plate 26 is disposed on the opposite side surface of the one pillar 2 at the edge thereof, and the piston side displacement transmission plate 30. Is fixed to the opposite side surface of the other pillar 2 at the edge thereof, and the cylinder side coupling portion 32 to which the cylinder 22 of the oil damper 21 is pin-joined is connected to the opposite side edge portion of the cylinder side displacement transmission plate 26 at the oil damper. Piston side connecting portions 33 to which 21 piston rods 23 are pin-joined are respectively attached to opposite side edge portions of the piston side displacement transmission plate 30.

  In this way, as shown in FIG. 3, the pair of columns 2 and 2 are inclined to the left and right in accordance with the shaking of the entire building during the earthquake, and the inclination is determined by the cylinder side displacement transmission plate 26 and the piston side displacement transmission plate. 30 is rotated counterclockwise (Fig. 1 (a)) and clockwise (Fig. 1 (b)) alternately.

  Therefore, a relative displacement along the material axis of the column 2 occurs between the cylinder side displacement transmission plate 26 and the piston side displacement transmission plate 30, and the oil damper 21 to which the relative displacement is input exhibits its damping force. To quickly converge the shaking of the building.

  On the other hand, the vibration damping device 6 is arranged so that the space inside the rectangular frame 5 is directly below the beam 3 and directly above the ceiling 7 installed below the beam, that is, the space behind the ceiling is the installation area. Of the areas excluding the installation area, the rectangular opening 9 sandwiched between the ceiling 7 and the floor board 8 provided below the ceiling 7 is attached so as to be openable between adjacent living rooms. Adjacent living rooms are integrated through the shaped opening 9.

  As described above, according to the vibration damping device 6 and the vibration damping structure 1 of a wooden building using the vibration damping device 6 according to the present embodiment, when the pair of columns 2 and 2 are tilted to the left and right according to the shaking of the entire building. The cylinder side displacement transmission plate 26 and the piston side displacement transmission plate 30 are rotated by the inclination, and the relative displacement along the material axis of the column 2 generated between them is input to the oil damper 21, The shaking can be quickly converged.

  Moreover, according to the vibration control structure 1 of the wooden building according to the present embodiment, the column 2 is formed at an angle close to the interlayer deformation angle in the event of an earthquake by targeting the wooden building constructed by the conventional frame construction method. , 2 are inclined to the left and right.

  For this reason, although the relative displacement input to the oil damper 21 is smaller than the interlayer displacement, the relative displacement is limited to a level that can be sufficiently compensated by the damping capacity of the oil damper 21, thus converging the shaking of the building in a short time. It becomes possible.

  In addition, according to the vibration damping structure 1 for a wooden building according to the present embodiment, the installation area of the vibration damping device 6 is set directly above the ceiling 7 directly below the beam 3 and below the beam. Since the rectangular opening sandwiched between the floor plate 8 is the opening 9 that can be moved between the adjacent living rooms, the adjacent living rooms can be integrated through the opening to form a large living space.

  In the present embodiment, for the sake of convenience of explanation, an example in which vibration suppression is performed on the first floor has been described, but it goes without saying that the vibration control structure of a wooden building according to the present invention can be similarly applied to upper floors such as the second floor and the third floor. Yes.

  In the present embodiment, as shown in FIGS. 1 and 2, the oil damper 21 is disposed so that the material axis thereof is parallel to the material axis of the column 2, so that the relative input to the oil damper 21 is achieved. Although the displacement is made as large as possible, it is not necessarily limited to such a vertical arrangement, and if the performance of the oil damper is sufficient, for example, it may be arranged such that its material axis is inclined. .

  In such a modification, the installation height of the vibration damping device can be kept low.

  Further, in this embodiment, the installation area of the vibration damping device 6 is directly below the beam 3 and directly above the ceiling 7. However, if a rectangular opening remains in the inner space of the rectangular frame 5, the vibration damping device 6 It does not matter how the device 6 is installed.

  FIG. 4 is a front view showing such a modification. In the wooden building damping structure 41 shown in the figure, the installation area of the damping device 6 is set directly below the torso 3a as the upper horizontal member and directly above the base 4, and immediately below the torso 3a. The vibration damping device 6 is hidden by the vertical wall 42 and the vibration damping device 6 installed immediately above the base 4 is hidden by the waist wall 43, and a waist window is fitted into a rectangular opening 44 sandwiched between them.

  According to such a configuration, it is possible to increase the degree of contribution to damping by the damping devices 6 and 6 that are arranged in two stages above and below while securing standard lighting and ventilation by the waist window. .

  FIG. 5 is a front view showing another modified example. The vibration damping structure 51 of the wooden building shown in the figure has a rectangular opening extending directly below the torso 3a with the installation area of the vibration damping device 6 directly above the base 4 and concealing the vibration damping device with a wall 52. A high window is fitted in 53.

  According to such a configuration, while using the lower part of the wall 52 as a space for vibration control and using the upper part as the opening 53 for daylighting, the vibration control device 6 contributes to vibration control of the entire building. It is possible to block the line of sight from the outside with the wall 52 where the light source is installed, and to secure high-quality lighting peculiar to the so-called high side light through the opening 53.

  Instead of setting the area directly above the base 4 as the installation area of the vibration damping device 6, as shown in FIG. In addition, the high window may be fitted into the rectangular opening 53a that extends upward, and the ground window may be fitted into the rectangular opening 53b that extends downward.

  According to such a configuration, the area extending to the intermediate height of the rectangular frame 5 can be used as the installation area of the vibration damping device 6, and the upper and lower sides thereof can be used as the openings 53a and 53b for daylighting and ventilation. While contributing to vibration control of the entire building, while blocking the line of sight from the outside with the wall 52a, the aperture 53a secures high quality lighting peculiar to so-called high-side lights, and the ventilation function peculiar to the ground window Can be secured.

  In addition, the inclination angle of the columns 2 and 2 at the time of the earthquake is restricted at the joint part even in the conventional shaft assembly method, and the intermediate height position is larger than the top part and the end part. . Therefore, if configured as described above, it is possible to increase the relative displacement input to the oil damper 21.

  Although not particularly mentioned in the present embodiment, as shown in FIGS. 7A and 7B, a pair of rectangular frames 61 and 61 having a width corresponding to the inner dimension of the pair of columns 2 and 2, The cylinder-side displacement transmission plate 26 and the piston-side displacement transmission plate 30 may be attached to the opposing side surfaces of the pair of columns 2 and 2 with the cylinder-side displacement transmission plate 26 and the piston-side displacement transmission plate 30 interposed therebetween.

  The rectangular frame 61 may be loosely fixed to the column 2 as necessary, or the shear deformation of the entire rectangular frame may be allowed so as not to restrain the tilt deformation of the columns 2 and 2 during an earthquake. The cylinder-side displacement transmission plate and the piston-side displacement are configured so as not to restrain the rotational deformation in the plane of the cylinder-side displacement transmission plate 26 and the piston-side displacement transmission plate 30 due to the inclination deformation of the columns 2 and 2. A clearance is provided between the transmission plate and the transmission plate is slidable.

  According to such a configuration, it is possible to prevent the cylinder side displacement transmission plate 26 and the piston side displacement transmission plate 30 from buckling in the out-of-plane direction without obstructing the operation of the vibration damping device 6 at the time of an earthquake. It becomes possible.

  The cylinder side displacement transmission plate 26 and the piston side displacement transmission plate 30 are fixed to the columns 2 and 2 using angles 27 ′ and 31 ′ shorter than the inner height of the rectangular frame 61 instead of the angles 27 and 31. Is desirable.

  According to such a configuration, there is no concern that the rectangular frame 61 interferes with the angles 27 ′ and 31 ′ at the corners, and the workability of attaching to the column 2 is improved.

  The cylinder side displacement transmission plate 26 and the piston side displacement transmission plate 30 may be attached to the outer surfaces (rear surfaces) of the angles 27 'and 31' as shown in FIG. Instead, it may be attached to the inner surfaces of the angles 27 'and 31' as shown in FIG.

  According to this configuration, the cylinder side displacement transmission plate 26 and the piston side displacement transmission plate 30 can be more firmly fixed to the columns 2 and 2.

  In this embodiment, the oil damper 21 is disposed so that the piston rod 23 is on the top and the cylinder 22 is on the bottom. However, the oil damper 21 may be upside down.

  Next, a test body corresponding to the vibration damping structure of a wooden building according to the present invention was manufactured, and the damping characteristic was examined by applying a dynamic horizontal force to the test body. The outline will be described below.

  FIG. 8 is a front view showing each test body. A common rectangular frame has a 105 mm square cross section with a length of 2,550 mm, a 105 mm square cross section with a height of 2,587.5 mm. Three columns were erected symmetrically at a pitch of 910 mm, and a beam having a beam width of 105 mm, a beam formation of 180 mm, and a length of 2,550 mm was bridged on the top of them.

  In such a rectangular frame, a bracket in which one end is suspended from a column and the other end is suspended from the lower surface of the beam so that the oil damper is in a horizontal position at a height of 540 mm below the beam (lower edge of the oil damper mounting plate) The test piece 1 (joint type) was made by pin-joining each (Fig. (A)), and the oil damper was installed at a height of 250 mm below the beam. The constructed sample was designated as test body 2 (piroti type).

  The oil damper used was sold by Hitachi Automotive Systems, Ltd. under the name of “Seismic Reduction Kun Smart” (registered trademark).

  On the other hand, like the vibration damping structure 1 of the wooden building of this embodiment described in FIG. 1, the cylinder side displacement transmission plate and the piston side displacement transmission plate have a height of 460 mm, a width of 332.5 mm, and a clearance from below the beam. The configuration was 50 mm, and the distance between them was 140 mm.

  In addition, the test body of only the rectangular frame which does not provide an oil damper was made into the test body 0. FIG.

  FIG. 9 is a graph showing the hysteresis damping characteristics when a dynamic force test is performed on each specimen. This dynamic force test is a test method for damping walls that apply force in order from the smallest deformation with a combination of amplitude and frequency. This was performed in accordance with the provisions of “No. 1 Performance confirmation test method for seismic strengthening construction using bearing walls with damping materials”.

  First, comparing the test body 1 and the test body 2 which are conventional vibration damping devices, the test body 2 has a shorter distance from the bottom of the beam to the oil damper as compared with the test body 1, so that the distance between the beam and the column is low. The displacement angle cannot be made large, and it is difficult to ensure the amount of displacement of the oil damper.

  For this reason, the specimen 2 was less than the specimen 1 in both the amount of hysteresis attenuation and the maximum load at any interlayer displacement.

  Here, when the distance from the beam under the beam to the oil damper is further extended in the test body 1, the relative displacement input to the oil damper increases, and as a result, the damping force of the oil damper increases and hysteresis damping Although both the amount and the maximum load can be increased, the installation area of the vibration damping device including the oil damper is increased correspondingly, and it is difficult to secure the opening.

  On the other hand, the test body 3 corresponding to the present invention has the same amount of hysteresis attenuation and maximum load in any interlaminar displacement, although the distance from the beam under the beam to the oil damper is the same as that of the test body 1. The hysteresis attenuation and maximum load in large deformation (1/15 rad) were significantly larger than those of other test bodies.

  This is because the shaking of the building at the time of earthquake was taken out in the form of relative vertical displacement of the cylinder side displacement transmission plate and the piston side displacement transmission plate accompanying the tilt deformation of the column, and it was installed by ensuring the distance between the columns. It was found that high vibration control performance can be achieved while suppressing the height.

1, 41, 51 Damping structure of wooden building 2 Column 3 Beam (upper horizontal member)
3a Torso (upper horizontal member)
4 Foundation (Lower horizontal member)
5 Rectangular frame 6 Damping device 7 Ceiling 8 Floor plate 9, 44, 53 Rectangular opening 21 Oil damper 22 Cylinder 23 Piston rod 26 Cylinder side displacement transmission plate 30 Piston side displacement transmission plate 32 Cylinder side coupling portion 33 Piston side coupling portion 61 Rectangular frame

Claims (6)

An oil damper, a cylinder side connecting portion to which a cylinder constituting the oil damper is pin-joined, a piston side connecting portion to which a piston rod constituting the oil damper is pin-joined, and a wooden building frame member are configured. Of a pair of columns arranged opposite to each other, a cylinder-side displacement transmission plate that can be fixed to an opposite side surface of one column at an edge and the cylinder-side connecting portion can be mounted at the opposite edge, and the other column A vibration damping device comprising a piston-side displacement transmission plate that can be fixed to the opposite side surface at the edge and to which the piston-side connecting portion can be attached at the opposite edge, the vibration damping device comprising the pair of columns, Out of the inner space of the rectangular frame composed of the upper horizontal members spanned on the tops and the lower horizontal members connecting the legs, the lower members are directly below the upper horizontal members. Arranged so that the installation area is directly above the horizontal member or near the middle height of the pair of columns, and the area excluding the installation area in the inner space of the rectangular frame is a rectangular opening. The cylinder-side displacement transmission plate and the piston-side displacement transmission plate are fixed to the opposing side surfaces of the pair of columns, respectively , and a pair of rectangular frames having an internal dimension of the pair of columns as a width therebetween, A damping structure for a wooden building, wherein the cylinder-side displacement transmission plate and the piston-side displacement transmission plate are fixed to opposite sides of the pair of columns, respectively . The installation area is directly below the upper horizontal member and directly above the ceiling installed below the upper horizontal member, and an opening sandwiched between the ceiling and a floor plate provided below the ceiling is formed in the rectangular shape. 2. The vibration control structure for a wooden building according to claim 1, wherein the structure is an opening, and the opening is an opening that can be moved between adjacent living rooms. The installation area is set directly below the upper horizontal member and directly above the lower horizontal member, the opening sandwiched between them is the rectangular opening, and a waist window is fitted into the opening. Damping structure of wooden building. 2. The wooden building according to claim 1, wherein the installation area is directly above the lower horizontal member, the opening extending directly below the upper horizontal member is the rectangular opening, and a high window is fitted into the opening. Damping structure. The installation area is in the vicinity of the intermediate height of the pair of pillars, and an opening extending directly below the upper horizontal member and an opening extending immediately above the lower horizontal member are respectively the rectangular openings, 2. The vibration control structure of a wooden building according to claim 1, wherein a high window and a ground window are respectively fitted. The vibration control structure of a wooden building according to any one of claims 1 to 5, wherein the wooden building is a wooden building constructed by a conventional frame construction method.

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