JP2008038559A - Vibration control wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration control wall which imparts horizontal rigidity to a beam-column frame, that is necessary for the frame, consumes deformation energy of the entire frame in conjunction with horizontal deformation of the beam-column frame, and does not leave damage on the beam-column frame even if the horizontal deformation is imposed on the same. <P>SOLUTION: The vibration control wall 1 has damping devices 20 arranged at four corners of a PCaPC wall 10, and is mounted on each of upper and lower beams 40 via a joint 30 having a predetermined width, by PC bars 50. Each damping device 20 is formed of a plurality of plates pinching high-damping rubbers, and the plates are mounted on the beam 40 and the PCaPC wall 10, respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vibration control wall provided in a building frame composed of column beams.

  Conventionally, vibration damping dampers that have been used in building structures can be roughly divided into three types: a hysteresis type, a viscous type, and a viscoelastic type (for example, Non-Patent Document 1).

  Hysteresis type dampers use low-yield point steel, etc., which shows yield properties when a certain force is applied, and does not cause a subsequent decrease in yield strength. It is intended to reduce energy. The hysteretic damper must be replaced once it is plasticized.

  Viscous dampers are roughly classified into oil dampers and viscous dampers. The oil damper uses hydraulic oil, and the viscous damper uses a polymer compound, and attempts to reduce the vibration energy of the building by a resistance force proportional to speed or an exponential power. The shape includes a cylindrical type, a surface type, and a multilayer type. These dampers generally do not contribute to the initial stiffness of the building.

  Viscoelastic dampers are intended to reduce the vibration energy of buildings by sandwiching viscoelastic materials such as acrylic compounds, diene compounds, asphalt compounds, styrene compounds between steel plates and using their shear resistance. It is. Although it has some rigidity, it is extremely small compared to the rigidity of the building.

  Damping walls (damping dampers and attachment members to the main frame) when using each of the above dampers effectively consume energy associated with the deformation of the building during an earthquake, but significantly improve the building rigidity. In addition, it was difficult to prevent damage caused by the deformation of the building.

  For this reason, there is a demand for a damping wall that effectively adds additional rigidity to the column beam frame that makes up the building, and that does not damage the damping wall itself during an earthquake and that effectively consumes seismic energy. Yes.

  In addition, as a composite material that attenuates due to compression deformation, for example, there is a composite material in which glass fiber reinforced plastic rods having a diameter of about 1 mm are arranged in four diagonal directions of a cube and are combined in an isotropic manner and hardened with a flexible epoxy resin. (For example, refer nonpatent literature 2.).

  The present inventors can add the necessary horizontal rigidity to the column beam frame and consume the deformation energy of the entire frame in conjunction with the horizontal deformation of the column beam frame. A damping wall that does not remain is provided (see Patent Document 1).

This technology is installed between the horizontal beams on the upper and lower floors connecting the spans, and joints with a certain width are provided in the horizontal direction. Damping materials made of materials that consume deformation energy are interposed near both ends of the joints. The seismic material is installed with a certain compressive force and compressive deformation, and is a technology that connects the damping walls with upper and lower floor beams and vertical PC tendons. This technology is special in damping material.
Japan Seismic Isolation Structure: Passive Damping Structure Design and Construction Manual, pp. 1-6, 2003.10. Japan Society of Civil Engineers Seismic Engineering Committee: Seismic control structure using composite material that generates damping by compressive deformation, Proceedings of the 1st Seismic Isolation and Seismic Control Colloquium, pp. 249-255, 1996.11. JP 2006-83546 A (page 2-3, FIG. 1)

  The inventors of the present invention are further developing the technology of the damping wall for effectively improving the seismic performance in the column beam frame of the building.

  The problem of the damping wall to be solved by the present invention is that the necessary horizontal rigidity can be added to the column beam frame, and the deformation energy of the entire frame can be consumed in conjunction with the horizontal deformation of the column beam frame. The purpose is to provide a damping wall that does not leave any damage to the damping wall even if it is subjected to horizontal deformation.

  In addition, a technique different from the technique using a special material as disclosed in Non-Patent Document 1 and Japanese Patent Application Laid-Open No. 2006-83546 is provided.

  The present invention has been made to solve the above-described problems, and is a vibration control wall characterized by taking the following technical means. That is, the present invention is a wall provided in a building frame composed of column beams, the wall having a constant width between the upper and lower floor horizontal beams connecting the spans, and between the upper and lower beams and the upper and lower ends of the wall. The damping wall is characterized by being provided with joints, interposing damping devices in the vicinity of both ends of the joints, and being joined by beams on the upper and lower floors and vertical PC tendons.

  This seismic control wall is installed near the center between the horizontal beams on the upper and lower floors in a column beam structure that tends to lack the horizontal rigidity and strength of horizontal deformation of the frame. To improve the horizontal rigidity and strength of the entire building.

  Further, a joint having a certain width is provided between the upper and lower ends of the damping wall of the present invention and the beam, and a damping device using high damping rubber is incorporated in the vicinity of both ends of the joint between the upper and lower beams and the damping wall. The horizontal deformation of the frame causes bending deformation and rotation deformation in the damping wall, and the joints of the damping wall are separated. Due to this deformation, the damping device built in the damping wall expands and contracts to consume the deformation energy of the frame.

  The damping wall of the present invention can add the horizontal rigidity necessary for the column beam frame, and can consume the deformation energy of the entire frame in conjunction with the horizontal deformation of the column beam frame. Even if it is given, it has an excellent effect that no damage remains on the damping wall.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing a damping wall 1 according to an embodiment of the present invention, and FIG. 2 is a view taken along the line AA in FIG.

  As shown in FIG. 1, the damping wall 1 is composed of a precast prestressed concrete wall (PCaPC wall) 10 and a damping device 20. The PCaPC wall 10 is connected to upper and lower beams 40 and PC steel bars (PC steel) via joint mortar 30. (Tension material) 50.

  The shape of the PCaPC wall 10 is, for example, a width of 2000 mm × height of 2400 mm × thickness of about 300 mm, and has a cross shape with notches 11 (width 600 mm × height 730 mm) for installing the attenuation device 20 at the four corners Yes. The damping wall 1 is obtained by crimping the PCaPC wall 10 and the beam 40 having a width of 600 mm × not more than 900 mm with four PC steel bars 50 through a joint mortar 30 having a thickness of 25 mm.

  An example of the attenuation device 20 is shown in FIG. The damping device 20 is composed of three mounting members 22 sandwiching two damping materials 21 (high damping rubber). However, the damping material 21 may have any number of layers. FIG. 4 shows an example in which four damping materials 21 are provided. The joint surface between the mounting member 22 and the damping material 21 is shot blasted.

    The dimensions of the damping device 20 are, for example, the dimensions H = 200 mm, W = 200 mm, the rubber thickness 3 mm, and the attachment member 22 shown in FIG. The attenuation device 20 is disposed at the four corners of the PCaPC wall 10 as shown in FIGS. The damping device 20 is coupled into the PCaPC wall 10 and the beam 40. For example, the mounting member 22 (see FIGS. 3 and 4) is coupled to the plate 23 protruding from the beam 40 and the plate 24 protruding from the PCaPC wall 10 by mounting bolts 26.

  FIG. 5 is a graph showing a curve 61 of a load displacement relationship (restoring force characteristic) (calculated value) of the PCaPC wall 10, and FIG. 8 is a curve 62 of a load displacement relationship (horizontal conversion) (restoring force property) of the damping device 20. It is a graph.

  The damping wall 1 is composed of the PCaPC wall 10 and the damping device 20, and the load displacement relationship (restoring force characteristic) of the damping wall 1 is a curve shown in FIG. 9 combining FIG. 7 and FIG. 63.

It is a front view of the test body of this invention. It is an AA arrow line view of FIG. It is a perspective view which shows the example of an attenuation device. It is a perspective view which shows the example of an attenuation device. It is a schematic graph which shows the load deformation of a damping wall. It is a typical graph which shows the load displacement relationship of an attenuation device. It is a schematic graph which shows the load displacement relationship of a damping wall.

Explanation of symbols

1 Damping wall 10 PCaPC wall 11 Notched 20 Damping device 21 Damping material (laminated rubber)
22 Mounting member 26 Mounting bolt 30 Joint mortar 40 Beam 50 PC steel bar 61, 62, 63 Curve

Claims (1)

  A wall provided in a building frame composed of column beams, which is interposed between upper and lower floor horizontal beams connecting spans, and having a joint with a fixed width between the upper and lower beams and the upper and lower ends of the wall. A damping wall characterized in that a damping device is interposed in the vicinity of both ends of the joint, and the upper and lower floor beams are joined to each other by a vertical PC tension member.

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