JP2010174495A - Inertia mass damper for building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inertia mass damper for a building, which can bring about a high vibration control effect at a low cost without executing any work to the building body. <P>SOLUTION: The inertia mass damper for the building includes: a plurality of vertical-load bearing members 1 which are erected around the periphery of the building A and which can bear only a vertical load; a horizontal member 2 which is laid across the plurality of vertical-load bearing members 1 astride the building A; a restoring member 3 and a damping member 4, which are interposed between the horizontal member 2 and the building A; and a loaded object 5 which is supported by the horizontal member 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an inertial mass damping device for a building.

  Conventionally, an inertial mass damping device having a mechanism for suppressing vibration of a building by changing the vibration shape of the building at the time of an earthquake by adding mass to the roof or top floor of the building via a restoring member and a damping member. there were. However, there is a case where the vertical load acting on the building frame increases by the added mass, and the strength of the columns and beams against this vertical load may have to be increased, and components such as industrialized houses have already been standardized. In the case of buildings, there was a problem that it was difficult to deal with. In addition, there is a case where it is difficult to cope with the case where such a vibration control device is added to an existing building as well as an industrial house.

  On the other hand, Patent Document 1 discloses a vibration damping reinforcement structure in which a new structure composed of column beams is constructed outside an existing building, and the existing building and the new structure are connected by a vibration damping device. . According to this vibration-damping / reinforcing structure, the existing building can be reinforced without much modification.

JP 2008-115567 A

  However, the configuration of Patent Document 1 does not suppress the vibration of the building by adding the mass of the new structure to the top floor of the existing building and changing the vibration shape of the building at the time of the earthquake. A new structure is constructed as an anchor for a vibration control device connected to a building. In addition, the columns need to be strong enough to bear the vertical load as well as the horizontal load that acts on the new structure during an earthquake, increasing the number of columns required or increasing the cross-section of the columns, resulting in space for column installation. There is a problem that it is difficult to secure, and a problem that costs increase.

  The present invention solves the above-mentioned problems, and the object of the present invention is that there is no need to modify the main body of the building, space saving, cost reduction, and high vibration damping effect can be obtained. An object of the present invention is to provide an inertial mass damping device.

  In order to achieve the above object, a first configuration of an inertial mass damping device for a building according to the present invention includes a plurality of vertical load support members capable of supporting only a vertical load installed around a building, and the building A horizontal member spanning the plurality of vertical load support members, a restoring member and a damping member interposed between the horizontal member and the building, and a load supported by the horizontal member. It is characterized by having.

  According to a second configuration of the inertial mass damping device for a building according to the present invention, the rigidity and the damping property of the restoring member and the damping member are adjusted according to the earthquake-resistant structural characteristics of the building in the first configuration. It is possible.

  The third configuration of the building inertial mass damping device according to the present invention is the first and second configurations, wherein the load is solar radiation such as a roof garden device, a solar power generation device, a solar water heater, or the like. It is a utilization device.

  In addition, a fourth configuration of the inertial mass damping device for a building according to the present invention is the floor member spanned so as to cover the roof surface of the building in the first to third configurations. It is characterized by being supported by the horizontal member via

  According to the first configuration of the inertial mass damping device for a building according to the present invention, the plurality of vertical load support members erected around the building are configured to support only the vertical load. It is possible to leave the building body without a vibration damping device without burdening the building with the load of the load. Also, since the vertical load support member only needs to be strong enough to support the vertical load from the load and the horizontal member, the number can be minimized or the cross-section can be reduced. It can be a device, and the influence on the planning of the external space can be reduced.

  In addition, according to the second configuration of the building inertial mass damping device according to the present invention, the restoring member and the damping member can be adjusted in rigidity and damping according to the earthquake-resistant structural characteristics of the building. It is possible to deal with buildings of structural types and structural sections with the same device.

  Moreover, according to the 3rd structure of the inertial mass damping device of the building which concerns on this invention, since the load was a solar radiation utilization apparatus, such as a rooftop garden apparatus, a solar power generation device, a solar water heater, it was effective conventionally. The space above the top floor (roof surface) of an existing building that could not be used can be used effectively, and the mass of the solar radiation device can also be effectively used as an indispensable mass for constructing an inertial mass damping device. I can do it. In addition, it can be expected to protect existing buildings from ultraviolet rays and rainwater and prolong the life of the buildings.

  Moreover, according to the 4th structure of the inertial mass damping device of the building which concerns on this invention, a load is supported by a horizontal member through the floor member spanned so that the roof surface of a building might be covered. Therefore, it can protect from the deterioration by the solar radiation of the roof surface of a building.

It is a cross-sectional schematic diagram which shows the structure of the inertial mass damping device of the building which concerns on this invention. It is a figure which shows an example of a restoring member.

  An embodiment of an inertial mass damping device for a building according to the present invention will be specifically described with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a configuration of an inertial mass damping device for a building according to the present invention, and FIG. 2 is a view showing an example of a restoring member.

  In FIG. 1, reference numeral 1 denotes a plurality of vertical load support members that can support only a vertical load installed around an existing building A, and reference numeral 2 denotes a plurality of vertical load support members 1 that straddle the building A. It is a horizontal member. The vertical support member 1 is made of a square steel pipe, an H-shaped steel or the like having a cross-sectional performance capable of supporting a vertical load. Further, the horizontal member 2 is made of H-shaped steel or the like, and a floor member (not shown) made of a PC plate, a deck plate or the like is spanned over the horizontal member 2 so as to cover the entire roof surface of the building A. ing.

  The vertical load support member 1 is erected on a foundation (not shown) having a lower end portion provided near the ground surface, and supports the horizontal member 2 that supports the load 5 and the floor member at the upper end portion. . The vertical load support member 1 is pin-joined at both the upper and lower ends and can support only the vertical load of the load 5, the floor member, and the horizontal member 2 that function as additional mass of the inertial mass damping device. The frame structure composed of the support member 1 and the horizontal member 2 is an unstable structure, and the horizontal force cannot be borne by this frame structure.

  As shown in FIG. 2, the horizontal member 2 and the building A have a restoring member 3 composed of a natural rubber-based laminated rubber 3a and a variable stiffness device 3b, and a damping member 4 composed of an oil damper. Is provided. The attenuating member 4 has a function of attenuating the relative displacement between the roof surface of the building A and the horizontal member 2 at the time of the earthquake, and the restoring member 3 includes a load 5 and a floor member as additional mass. In order to restore the horizontal relative displacement of the horizontal member 2 with respect to the building A, the building A and the horizontal member 2 are connected. Although the restoration member 3 connects the building A and the horizontal member 2, the vertical load due to the additional mass is not transmitted to the building A via the restoration member 3.

  The load 5 is supported by the horizontal member 2 via a floor member formed so as to cover the roof surface of the building A. The load 5 according to the present embodiment is a solar radiation utilization device such as a roof garden device, a solar power generation device, or a solar water heater.

  The restoring member 3 and the damping member 4 having the above-described configuration are configured such that the rigidity and the damping property can be adjusted according to the earthquake-resistant structural characteristics of the building A. That is, as shown in FIG. 2, the variable stiffness device 3b constituting the restoring member 3 has a piston rod 3b2 that is configured to be movable in contact with a friction plate 3b1 provided on the roof of the building A. The material 2 is provided. Then, by applying hydraulic pressure to the piston rod 3b2 and pressing or loosening the tip of the piston rod 3b2 to change the frictional force, the restoring force characteristics after the horizontal movement of the horizontal member 2 relative to the building A are changed. Thus, the rigidity of the restoring member 3 can be adjusted. In addition, the damping member 4 can adjust the damping property of the damping member 4 by changing the damping force by driving the electromagnetic actuator of the oil damper and changing the orifice (oil passage opening) in the oil damper. It is said.

  The rigidity of the restoring member 3 and the damping force of the damping member 4 are optimized by analysis based on the weight and rigidity of the building and the weight of the additional mass composed of the load 5 supported by the vertical load support member 1 and the horizontal member 2 and the like. It is set to a valid value. That is, the additional mass is set to vibrate with a displacement larger than the displacement of the building A by the restoring member 3 having a rigidity smaller than that of the building A at the time of the earthquake.

  With the above configuration, the vibration shape (eigenvector) of the building A is changed, and the interlayer deformation of the building A during the earthquake can be reduced, and damage to the building A during the earthquake can be suppressed.

  Further, since it is not necessary for the building A to bear the vertical load due to the additional mass composed of the load 5 supported by the vertical load supporting member 1 and the horizontal member 2, etc., it is necessary to give special reinforcement to the building A. Absent. Therefore, it is particularly suitable for seismic reinforcement of existing buildings or for improving seismic resistance without altering the material standards of industrialized houses whose members are standardized.

  In addition to the above configuration, laminated rubber, viscoelastic member, steel member and the like can be used as the restoring member 3. The damping member 4 may be a viscoelastic damper having both damping properties and elasticity, a steel damper having a damping effect when plastically deformed, a friction damper, and the like. As the damping member whose damping property can be adjusted, an MR (magnetic viscous fluid) damper or the like can be adopted in addition to the oil damper. Alternatively, a viscoelastic member such as a high damping rubber having the function of the restoring member 3 and the function of the damping member 4 may be used.

  As an application example of the present invention, it can be applied to an inertial mass damping device of a building.

A ... Building 1 ... Vertical load support member 2 ... Horizontal member 3 ... Restoring member 3a ... Natural rubber-based laminated rubber 3b ... Stiffness variable device
3b1… friction plate
3b2 ... piston rod 4 ... damping member 5 ... load

Claims (4)

A plurality of vertical load supporting members capable of supporting only vertical loads installed around the building;
A horizontal member straddling the plurality of vertical load support members across the building,
A restoring member and a damping member interposed between the horizontal member and the building;
A load supported by the horizontal member;
An inertial mass damping device for a building characterized by comprising: The inertial mass damping device for a building according to claim 1, wherein the restoring member and the damping member are adjustable in rigidity and damping property according to a seismic structure characteristic of the building. The building's inertial mass damping device according to claim 1 or 2, wherein the load is a solar radiation utilization device such as a roof garden device, a solar power generation device, or a solar water heater. The building according to any one of claims 1 to 3, wherein the load is supported by the horizontal member via a floor member spanned so as to cover a roof surface of the building. Inertial mass damping device.

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