JP4884914B2 - Vibration control device installation structure of unit building - Google Patents

Description

  The present invention relates to a vibration control device installation structure for a unit building, and more particularly to a vibration control device installation structure for a unit building that reduces shaking of a unit building.

There is a vibration control method as a technique for reducing shaking of buildings due to earthquakes, strong winds, and the like (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 11-200487

  When installing a vibration control device in a unit building, it is common to install it in a single column beam frame (between one upper and lower beams).

  When installing a vibration control device in the single column beam frame of the unit method, the reaction force from the vibration control device is input to the building, so the members to which the vibration control device is attached, that is, large floor beams and large ceiling beams are enlarged. However, there is a problem that a reinforcing member such as a vertical member is required for the floor beam and the ceiling beam, and a normal member cannot be used as it is.

  This is because the damping device generates a damping force related to deformation, speed, etc., in order to attenuate the shaking of the building, and as a result, a reaction force acts on the mounting portion (floor beam, ceiling beam). Since the beam members are not designed on the assumption that force is applied partially from the direction other than the material axis direction, a reinforcing member such as a vertical member is required to connect the floor beam and the ceiling beam to the mounting part of the vibration control device. .

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a vibration control device installation structure for a unit building that can reduce the number of reinforcing members.

The unit building vibration control device installation structure according to claim 1 is disposed at an upper part of a foundation, and a unit building in which a plurality of units are stacked, a floor beam on an upper floor of the unit building, and a lower floor adjacent to the floor beam. Transmission means for transmitting force between the ceiling beams of the floor, one end side is connected to the transmission means, and the other end side is connected to a portion that is relatively displaced when the unit building is shaken, And damping means for absorbing an input force so as to suppress relative displacement between the transmission means and the relative-displacement foundation .

Next, the operation of the vibration control device installation structure for a unit building according to claim 1 will be described .

When a unit building shakes due to an earthquake, strong wind, etc., a horizontal relative displacement occurs between the foundation and the floor beam and ceiling beam, but the floor beam on the upper floor of the unit building and adjacent to this floor beam The transmission means that transmits force to the ceiling beam on the lower floor is connected to one end side of the vibration damping means, and the other end side of the vibration damping device is the basis for relative displacement from the transmission means when the unit building shakes Since they are connected, the relative displacement is suppressed by the vibration control means, and as a result, the shaking of the unit building is reduced. Since the other end side of the damping means is connected to a solid foundation, a high damping effect can be obtained.

In the prior art, in order to receive a reaction force from the damping device, but not require special reinforcing member, such as a large longitudinal member connecting the floor beams and ceiling beams, the unit building according to claim 1 In the vibration damping device installation structure, one end of the vibration damping device is connected to a transmission means for transmitting force between the floor beam on the upper floor of the unit building and the ceiling beam on the lower floor adjacent to the floor beam. It is economical because it is not necessary to attach a special reinforcing member such as the above-mentioned large vertical member to the beam member at one end side of the vibration damping device.

  Also, by providing the transmission means, the floor beam and the ceiling beam are integrated mechanically, so that a large reaction force can be obtained when shaking occurs, and the reaction force is generated by the floor beam and the ceiling. Since it is directly propagated to the beam, a high damping effect can be obtained.

According to a second aspect of the present invention, in the vibration damping device installation structure of the unit building according to the first aspect, the damping means has a greater resistance force at the time of tensile force than at the time of compressive force, and the transmission means Is provided with an attachment member for attaching the one end side of the vibration damping means to the floor beam, and a spacer disposed between the floor beam and the ceiling beam and in contact with the floor beam and the ceiling beam. It is characterized by that.

Next, the operation of the vibration control device installation structure for a unit building according to claim 2 will be described .

  When using vibration damping means with greater resistance during tensile force than during compression force and attaching one end of the vibration damping means to the floor beam via a mounting member, the unit building will shake due to an earthquake, strong wind, etc. When a tensile force is applied to the vibration damping means, the floor beam receives a force from the vibration damping means, and the force received by the spacer arranged between the floor beam and the ceiling beam is applied to the ceiling beam. It can propagate and receive this force on both floor and ceiling beams. For this reason, the attenuation of the reaction force is suppressed, and a high vibration damping effect is obtained.

According to a third aspect of the present invention, in the vibration damping device installation structure for a unit building according to the first aspect, the transmission means includes a plate member that connects a side surface of the floor beam and a side surface of the ceiling beam. It is characterized by.

Next, the operation of the vibration control device installation structure for a unit building according to claim 3 will be described .

In the vibration control device installation structure of the unit building according to claim 3, the plate material that connects the side surface of the floor beam and the side surface of the ceiling beam transmits force between the floor beam and the ceiling beam. Since the plate material only needs to be connected to the side surface of the floor beam and the side surface of the ceiling beam, less material is used.

  As described above, according to the vibration control device installation structure of the unit building of the present invention, it is possible to suppress the shaking of the unit building and reduce special and large reinforcing members such as vertical members that have been conventionally required. can do.

[First Embodiment]
Hereinafter, a first embodiment of a vibration control device installation structure for a unit building according to the present invention will be described with reference to FIGS.

(Overall configuration of unit building according to this embodiment)
As shown in FIG. 1, the unit building 10 according to this embodiment includes eight building units 60.

  For convenience of explanation, names are given to the members of the building unit 60. The building unit 60 includes four pillars 32, two sets of long and short ceiling beams 42 and 44 arranged in parallel to each other, and two sets of long and short sets arranged in parallel up and down with respect to the ceiling beams 42 and 44. Floor girder 52, 54 is provided, and the end portion of the beam is welded to the ceiling and floor joints to form a ramen structure. However, the unit configuration is not limited to the above, and another box-shaped frame structure may be used.

  The building unit 60 includes a ceiling frame 62 and a floor frame 64 assembled in a rectangular frame shape, and is configured such that four pillars 32 are erected between them. The ceiling frame 62 includes ceiling joints (columns) 66 at the four corners, and ends of the ceiling beams 42 and 44 having different lengths are welded to the ceiling joint 66.

  Similarly, the floor frame 64 includes floor joints (columns) 68 at four corners, and the longitudinal ends of the floor beams 52 and 54 having different lengths are welded to the floor joint 68.

  The upper and lower ends of the pillar 32 are rigidly joined by welding between the ceiling joint portion 66 and the floor joint portion 68 that are arranged to face each other in the vertical direction, and are temporarily fixed by bolts. Composed.

  The first floor portion 10 </ b> A of the unit building 10 is configured by a total of four building units 60. In addition, although the four building units 60 are arrange | positioned adjacently, in order to make drawing easy to see, the building units 60 which adjoin in the digit direction (arrow A direction) are drawn apart.

  In a state where the four building units 60 are arranged adjacent to each other, a gap 46 having a longitudinal direction in the wife direction (arrow B direction) is formed between two sets of opposed ceiling beams 44.

  The second floor portion 10B is configured similarly to the first floor portion 10A. In the state where four such building units 60 are arranged adjacent to each other, a gap 56 having a wife direction as a longitudinal direction is formed between two sets of opposing floor beams 54.

(Vibration control device installation structure)
Next, the main part of the vibration damping device installation structure of this embodiment will be described in detail.

  As shown in FIGS. 2 and 3, the bracket 12 is inserted into the gap 46 of the first floor portion 10A and the gap 56 of the second floor portion 10B. The bracket 12 includes a pair of connecting steel plates 14 that are parallel to each other, and a central portion of one connecting steel plate 14 and a central portion of the other connecting steel plate 14 are connected by a steel round bar 18.

  As shown in FIG. 4, four attachment holes (not shown in FIG. 4) are formed in the connecting steel plate 14, and the bolts 20 through which the attachment holes are inserted are connected to the ceiling girder 44 on the first floor. The ceiling girder 44 and the floor girder 54 are connected to each other by screwing them into screw holes (not shown in FIG. 4) formed in the side surfaces of the girder and the second floor girder 54, respectively. In this embodiment, the bracket 12 is bolted to the floor beam 54 and the ceiling beam 44, but may be fixed by other methods such as welding.

  When transporting the building unit 60, the bracket 12 is laid so that the bracket 12 does not protrude above the upper surface of the ceiling beam 44, as shown by a two-dotted line in FIG. It can be fixed with one bolt 20.

  As shown in FIG. 2, two dampers 22 are disposed between two building units 60 adjacent in the girder direction. The damper 22 of the present embodiment is a so-called shock absorber used for automobile suspensions, and is manufactured at low cost by mass production. Further, the damper 22 used in the suspension of the automobile is set so that the damping force during tension is set larger than the damping force during compression.

  As shown in FIGS. 3 and 4, the round bar 18 of the bracket 12 is inserted into the hole 24 </ b> A of the bearing 24 attached to the tip of the piston rod 12 </ b> A of the damper 22. Thereby, the damper 22 and the bracket 12 are connected.

  As shown in FIG. 2, an extension rod 26 is attached to the cylinder 24 </ b> B of the damper 22, and a pin receiver 28 is attached to the tip of the extension rod 26 as shown in FIG. 5.

  As shown in FIGS. 5 and 6, a pinned anchor 30 is fixed to the foundation 16. The anchor 30 with a pin includes a shaft portion 30A and a pin attachment portion 30B that is integrally attached to an end portion of the shaft portion 30A. The shaft portion 30 </ b> A is inserted into a hole 34 formed in the foundation 16, and is firmly fixed to the foundation 16 by injecting a grind material 36 into the hole 34.

  The pin attachment portion 30B includes a U-shaped main body 30Ba and a pin 30Bb fixed to the main body 30Ba. Here, the pin 30 </ b> Bb of the pinned anchor 30 is inserted into the hole 28 </ b> A of the pin receiver 28 of the damper 22, whereby the damper 22 is connected to the foundation 16 via the pinned anchor 30.

  As shown in FIG. 2, the anchor 30 with the pin is provided at the central portion in the wife direction of the building unit 60. In FIG. 2, the bracket 12 connected to the damper 22 on the left side of the drawing is attached in the vicinity of the left end of the ceiling girder 44 and the floor girder 54, and the bracket 12 connected to the damper 22 on the right side of the drawing is attached to the ceiling. The dampers 22 are attached in the vicinity of the ends on the right side of the drawing of the girder 44 and the floor girder 54, so that the dampers 22 are inclined with respect to the vertical direction.

  As shown in FIG. 5, a pin 38 is attached to the side surface of the floor girder 52 on the first floor. By inserting 38, the extension rod 26 of the damper 22 can be temporarily fixed. A screw hole may be formed instead of the pin 38, and the pin receiver 28 may be temporarily fixed with a bolt.

  In addition, in FIG. 1, although illustration of the bracket 12 and the damper 22 is abbreviate | omitted, it is the same as the bracket 12 and the damper 22 also between the building units 60 of the 1st floor adjacent to the wife direction (arrow B direction). Has been placed.

(Action / Effect)
Next, the operation and effect of this embodiment will be described.

  When the unit building 10 sways in the direction of the wife due to an earthquake, strong wind, etc. and the ceiling beam 44 and the floor beam 54 are displaced in the arrow S direction, for example, as shown in FIG. A tensile force acts on the damper 22, and a compressive force acts on the damper 22 on the side opposite to the arrow S direction side. Since the damper 22 of this embodiment is set to have a large resistance force during tension, the displacement is suppressed by the damper 22 on the arrow S direction side where the tensile force acts.

  In this unit building 10, the floor girder 54 and the ceiling girder 44 are connected by the bracket 12, so that one end side of the damper 22 is supported by both the floor girder 54 and the ceiling girder 44 (synthetic beam). The floor beam 54 and the ceiling beam 44 are very little deformed, and a large reaction force can be obtained when shaking occurs. Further, the other end side of the damper 22 is connected to the solid foundation 16, and the one end side of the damper 22 is connected to the floor beam 54 and the ceiling beam 44 as described above, so that the vibration damping action of the damper 22 is effective. It can be used effectively, and a high damping effect can be obtained.

  In addition, one end of the damper 22 is connected to the bracket 12 and the other end of the damper 22 is connected to the foundation 16, and a special reinforcing member such as a large vertical member that connects the floor beam and the ceiling beam is not used. So it is economical for conventional unit buildings.

  When the ceiling beam 44 and the floor beam 54 are displaced in the direction opposite to the arrow S direction, a tensile force acts on the damper 22 on the opposite side to the arrow S direction side, and the displacement is different from the arrow S direction side. It is suppressed by the damper 22 on the opposite side. Further, when the unit building 10 shakes in the girder direction, the damper 22 disposed between the building units 60 adjacent in the wife direction similarly suppresses the displacement.

  In this way, the shaking of the unit building 10 is effectively suppressed.

  In the unit building 10 of this embodiment, since the lower end side of the damper 22 is directly attached to the foundation 16, there is no need to reinforce the floor large beam member, and a normal beam member can be used and it is economical. Further, the upper end side of the damper 22 is connected to a so-called composite beam in which the first-floor ceiling girder 44 and the second-floor girder 54 are coupled by the bracket 12, so that the beam members of the ceiling girder 44 and the floor girder 54 themselves are connected. There is no need to reinforce, and ordinary beam members can be used and are economical.

  In addition, since the damper 22 is connected to the bracket 12 that connects the first-floor ceiling beam 44 and the second-floor floor beam 54, a large reaction force can be obtained when a vibration occurs, and the longitudinal member of the conventional example can be obtained. Thus, the damping of the reaction force due to deformation of the reinforcing member or the like is suppressed, and a high damping effect is obtained by the damper 22.

  The bracket 12 and the damper 22 are preferably temporarily fixed to the building unit 60 on the first floor at the factory. At this time, the bracket 12 is temporarily fixed to the side surface of one floor girder 54 as shown by a two-dot chain line in FIG. 4, and the pin receiver 28 of the damper 22 is temporarily fixed by inserting the pin 38 of the floor girder 54. It ’s fine.

  In this embodiment, the bracket 12 is disposed and fixed between two adjacent building units 60 and connected to the damper 22. However, as shown in FIG. A bracket 12 in which one of the connecting steel plates 14 is omitted may be attached, and the damper 22 may be connected to the bracket 12. In this case, a female screw may be formed on the round bar 18 so that the bearing 24 does not come off from the round bar 18, and a hooked bolt 50 may be attached to the female screw.

  Although not shown, the bracket 12 and the damper 22 may be arranged on the inner surface side of the outer wall.

In the present embodiment, the shock absorber used for the suspension of the automobile is used as the damper 22, but the present invention is not limited to this, and a damper having the same damping force in the extension direction and the contraction direction may be used. You may use the damper of other structures, such as an oil damper and a viscoelastic damper.
[Second Embodiment]
Next, the second embodiment of the vibration control device installation structure for a unit building according to the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same structure as 1st Embodiment, and the description is abbreviate | omitted.

  As shown in FIGS. 8 and 9, in the unit building 10 of the present embodiment, a damper mounting bracket 40 and a steel plate spacer 48 are used instead of the bracket 12 used in the first embodiment. .

  The damper mounting bracket 40 includes a steel plate base plate 40A attached to the side surface of the second floor floor beam 54, and a steel shaft 40B fixed to the center of the base plate 40A by welding or the like. The base plate 40 </ b> A is fixed to the side surface of the floor girder 54 with the bolt 20.

  The shaft 40B is inserted into the hole 24A of the bearing 24 of the piston rod 12A of the damper 22.

  On the other hand, the spacer 48 is disposed between the ceiling beam 44 and the floor beam 54 so as to be in close contact with both the ceiling beam 44 on the first floor and the floor beam 54 on the second floor. The spacer 48 is preferably fixed to either the ceiling large beam 44 or the floor large beam 54.

  The arrangement position of the spacer 48 is preferably in the vicinity of the damper mounting bracket 40.

(Action / Effect)
Next, the operation and effect of this embodiment will be described.

  When the unit building 10 is shaken by an earthquake, strong wind, etc., and a tensile force acts on the damper 22, a large resistance force is generated on the damper 22, and the large floor beam 54 receives a large downward force. It propagates to the lower ceiling beam 44 and is received by both the floor beam 54 and the ceiling beam 44. For this reason, the attenuation of the reaction force is suppressed, and a high vibration damping effect is obtained.

  In the present embodiment, by installing a small spacer 48 between the first floor and the second floor, a force is transmitted from the second floor floor beam 54 to the first floor ceiling beam 44. It can be made smaller than the connecting steel plate 14 of the bracket 12 of the first embodiment, which is economical.

When a compressive force is applied to the damper 22, the reaction force when the compressive force is applied is smaller than the reaction force when the tensile force is applied, so that the floor beams 54, the spacers 48, and the ceiling beam 44 are There is no need to fix the three members to each other, and the reaction force can be received only by the floor beam 54.
[Other Embodiments]
(1) In the said embodiment, although the unit building 10 was 2 stories, the unit building 10 may be 3 or more floors. For example, when the unit building 10 is on the third floor, the bracket 12 may be attached so as to connect the ceiling big beam 44 on the second floor and the floor big beam 54 on the third floor, and the upper end of the damper 22 may be connected to the bracket 12.
(2) When the unit building 10 has three or more floors, as shown in FIG.
(3) When the unit building 10 is on the third floor or higher and the damper mounting bracket 40 and the spacer 48 as described in the second embodiment are used, the damper mounting bracket 40, as shown in FIG. A spacer 48 may be attached (embodiment corresponding to claim 4).

  In both cases (2) and (3), the beam member is economical because it does not require reinforcement of a vertical member or the like.

It is a disassembled perspective view of a unit building. It is a side view of a building unit. It is a longitudinal cross-sectional view near the floor beam and the ceiling beam between the first and second floors. It is a front view of a bracket. It is a front view of an anchor part with a pin. It is a side view of the anchor part with a pin. It is a longitudinal cross-sectional view near the floor girder and ceiling girder on the outer wall side between the first and second floors. It is a front view of the bracket which concerns on 2nd Embodiment. It is a longitudinal cross-sectional view near the floor beam and ceiling beam between the first and second floors according to the second embodiment. It is a side view of the building unit which concerns on other embodiment. It is a side view of the building unit which concerns on other embodiment.

Explanation of symbols

10 Unit building 10A First floor part 10B Second floor part 12 Bracket (Transmission means)
14 Connecting steel plates
16 Foundation 22 Damper (damping means)
30 Anchor with pin 40 Damper mounting bracket (Transmission means, mounting member)
42 Ceiling girder (ceiling beam)
44 Ceiling girder (ceiling beam)
48 Spacer (Transmission means)
52 Floor girder (floor beam)
54 Floor beams (floor beams)
60 building units

Claims (3)

A unit building that is placed on top of the foundation and stacked with multiple units;
  A transmission means for transmitting force between the floor beam on the upper floor of the unit building and the ceiling beam on the lower floor adjacent to the floor beam;
  One end side is connected to the transmission means, and the other end side is connected to the foundation that is displaced relative to the transmission means when the unit building is shaken, and the relative displacement between the transmission means and the foundation that is relatively displaced Vibration suppression means for absorbing the input force to suppress
  A vibration control device installation structure for a unit building, characterized by comprising: The vibration damping means has a greater resistance force during tensile force than during compression force,
  The transmission means includes a mounting member that attaches the one end side of the vibration damping means to the floor beam, a spacer that is disposed between the floor beam and the ceiling beam, and that contacts the floor beam and the ceiling beam. With
  The vibration control device installation structure for a unit building according to claim 1. 2. The vibration control device installation structure for a unit building according to claim 1, wherein the transmission unit includes a plate member that connects a side surface of the floor beam and a side surface of the ceiling beam.

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