JP6437685B1 - Seismic reinforcement device for existing buildings - Google Patents

Abstract

An earthquake-proof reinforcement device for an existing building that can be compactly attached to a beam-column joint of an existing building and that can effectively exert a reinforcing effect on the beam-column joint and a damping effect by a damper.
SOLUTION: A horizontal two-way beam attachment member 2 extending along two intersecting beams 12 at a beam-to-column junction, and a column attachment extending upward or downward from the intersection of the two-way beam attachment members 2. The connecting member 3, the rod-shaped horizontal damper 4 connecting between the tip portions of the two-way beam attaching member 2, and the connecting member 2 between the tip portion of the column attaching member 3 and the tip portion of the two-way beam attaching member 2 The rod-shaped diagonal dampers 5 are connected in a three-dimensional truss shape so as to form six sides of a substantially triangular pyramid shape. The three-dimensional truss shape resists vibration during the earthquake of the beam-column joint, and the horizontal damper 4 and the diagonal damper 5 absorb vibration energy with respect to the vibration of the beam-column joint more than a predetermined value.
[Selection] Figure 1

Description

  The present invention relates to a seismic reinforcement device for an existing building that is installed at a column beam joint of an existing building and reinforced the building against earthquakes, and is particularly suitable for seismic reinforcement of middle- and high-rise multi-story buildings.

  In Japan, an earthquake-prone country, the idea of earthquake resistance is reviewed each time based on lessons learned from past major earthquakes. Under such circumstances, the existing building structure based on the old seismic design has a problem that the seismic performance is not sufficient for a large earthquake expected in the future.

  For these reasons, for existing buildings, there is a demand for an earthquake-resistant reinforcement structure or method that can greatly improve earthquake-resistance performance without rebuilding, and various structures and methods have been proposed. .

  By the way, in areas with high land prices such as urban areas, many multi-storey buildings with narrow frontage such as pencil buildings have been constructed. Due to the shape of such a pencil building, the girder direction has a relatively high earthquake resistance, but the natural period in the interbeam direction is long, and there is a problem that the roll due to a relatively long period of ground motion tends to increase.

  Pencil buildings are often built on a narrow site, which makes it difficult to reinforce earthquake resistance from outside the building.

  As a technique related to building vibration control, for example, Patent Document 1 discloses that the first and second viscoelastic dampers are formed in a C shape or an inverted C shape in the structural surface constituting the column beam structure of the building. An arranged composite damping frame is disclosed.

  In addition, as a technique for providing an earthquake-resistant element at a joint between columns and beams, for example, Patent Document 2 discloses a structure in which a stick and a hammer that incorporate a viscoelastic damper are attached to a joint between a column and a beam or a beam of a wooden house. It is disclosed.

  Patent Document 3 discloses a vibration-damping structure building in which a form of a connection between a column and a beam of a building is a pin connection, and a damper that operates by a relative rotation between the column and the beam due to an interlayer displacement is interposed in the connection part. It is disclosed.

  In Patent Document 4, a movable bearing and a damper are arranged in a building frame, and a movable bearing that supports the upper frame on the lower frame so as to be relatively displaceable in the horizontal direction, and a lower frame and an upper frame. A seismic control structure including a damper interposed in parallel is disclosed.

  Patent Document 5 discloses a reinforced structure in which a brace member having a damper performance is erected between a column and a large beam in the vicinity of a column beam joint formed by rigidly connecting a column made of a steel material and a large beam. A reinforcing structure is disclosed.

  Further, Patent Document 6 discloses an elastic structure in which a seismic control device is juxtaposed on a column / beam frame side of a building and a free end portion of a cantilever mounting device for mounting a seismic control device on a building. In a configuration in which members are installed, a structure for mounting a vibration control device in which the vibration control device and an elastic member are stored in a ceiling or the like is disclosed.

JP 2010-112085 A JP 09-279683 A Japanese Patent Laid-Open No. 2001-200653 JP 2001-207676 A JP 2011-074732 A JP-A-2006-173014

  As in the invention described in Patent Document 1, the method of installing a damper that connects a beam or a column on the upper and lower floors in a wall requires a major renovation for installing the damper when applied to an existing building. Become.

  In the case of the inventions described in Patent Document 2 and Patent Document 5, the damper is provided on the wand or firestroke to provide a compact structure as a vibration control device. However, in these inventions, the damper gives a damping force. However, the reinforcement effect on the column beam frame is small.

  In the case of the inventions described in Patent Document 3 and Patent Document 4, it is practically impossible to incorporate them into an existing building later.

  Even if the invention described in Patent Document 6 can accommodate the vibration control device and the elastic member in the back of the ceiling or the like, a mounting member extending up and down the floor is required in the wall of the column beam frame. I can't say that.

  The present invention is intended to solve the above-described problems in the prior art, and can be compactly attached to a beam-column joint of an existing building, and has a reinforcing effect on the beam-column joint and a damping effect by a damper. The purpose is to provide a seismic reinforcement device for existing buildings that can be used effectively.

  The present invention relates to a seismic reinforcement apparatus for an existing building which is installed at a beam-column joint of an existing building and reinforced the building against earthquakes, and is a horizontal bi-directional beam extending along two beams intersecting the beam-column joint An attachment member, a column attachment member extending upward or downward from an intersection of the two-direction beam attachment members, a bar-shaped horizontal damper connecting between the tip portions of the two-direction beam attachment members, and the columns The tip of the attachment member and the two rod-shaped diagonal dampers connecting between the two ends of the beam attachment member in the two directions are connected in a three-dimensional truss shape so as to form six sides of a substantially triangular pyramid shape. Resisting the vibration of the beam-column joint during an earthquake, the horizontal damper and the oblique damper absorb the vibration energy against the vibration of the column-beam joint more than a predetermined value. It is.

  In the case of the dampers individually arranged at the position of the conventional wand or fire, it is unstable with respect to the force in the out-of-plane direction, whereas the seismic reinforcement apparatus of the present invention has two beam attachment members and 1 Since the column attachment members, one horizontal damper and two diagonal dampers are arranged in a three-dimensional truss shape, it can function in any direction force. As a reinforcing element that increases rigidity, it is possible to exert an earthquake-proof reinforcing effect.

  In addition, the horizontal damper and the diagonal damper function not only in the horizontal and vertical vibrations but also in the torsion of the building against a large earthquake motion, and can provide a great damping effect.

  As the beam attaching member and the column attaching member constituting the seismic reinforcement apparatus of the present invention, a rod-like or plate-like steel material or the like can be used. In order to use the beam attachment member and the column attachment member together with the horizontal damper and the diagonal damper as a reinforcing element of the column beam joint portion, it is necessary to provide a member having strength and rigidity necessary for reinforcement. In consideration of accommodation in the beam-column joint, steel materials such as rods, plates, and angles can be used.

  In addition, in actual existing buildings, there are many cases where the protruding corners of the pillars protrude to the side surfaces of the two beams that intersect, but in that case, the horizontal section of the column attachment member is L-shaped, What is necessary is just to cope with the shape of the column beam joint part of the building used as an application object, for example, using the column attachment member of the shape which entangled two members located in the both sides of a protruding corner part.

  Alternatively, if the protruding corner of the column is protruding, attach the seismic reinforcement device of the present invention in such a way that the protruding corner is not protruded by interposing a plate-like spacer on the side of the beam in two directions. Also good.

  In addition, the seismic reinforcement device of the present invention mainly attenuates the input seismic motion while resisting deformation of the column-beam joint, so that the steel sheet winding method is used for shearing the intermediate portion of the column or beam. Use other seismic control means, such as by applying seismic reinforcement by fiber sheet winding method, installing seismic retrofit elements at the wall position, or installing active or passive seismic control devices at the top of the building, etc. This can further increase the earthquake resistance of the entire building.

  Also, if the joint between the beam attachment member and the column attachment member is a joint whose angle can be adjusted in the joined state, when it is installed at the column beam joint, the column beam joint may not be perpendicular or It can deal with subtle distortions in the beam joint. Specifically, adjustment at the tightening portion of the pin structure using a bolt or the like, or a structure in which the bolt hole is adjusted as a long hole or a fool hole can be considered.

  The horizontal damper and the oblique damper do not need to be a damper as a whole member, and may be one in which a damper is incorporated in the middle of the steel material. As the damper itself, an existing friction damper, an axial force yield hysteresis steel damper, a rod-like viscous damper, or the like can be used.

  For example, if the length can be adjusted by incorporating a screw-type length adjusting member or a turnbuckle in the middle, the length can be adjusted without any axial force acting upon installation.

  In addition, depending on the end form of the beam attachment member, the column attachment member, the horizontal damper, and the oblique damper, a ball joint or other joint for a three-dimensional truss can be used as the joint.

  The form of the building to which the seismic reinforcement device for an existing building of the present invention is applied is not particularly limited, but it is suitable for a middle-to-high-rise multi-story building, particularly when applied to an existing pencil building with an RC or SRC structure, and installation is simple. High earthquake resistance can be expected.

  In the seismic reinforcement device of the present invention, two beam attachment members, one column attachment member, one horizontal damper and two oblique dampers are arranged in a three-dimensional truss shape, so It can be made to function with respect to force, and can also exert a reinforcing effect as a reinforcing element that increases the rigidity of the beam-column joint.

  In addition, the horizontal damper and the diagonal damper function not only in the horizontal and vertical vibrations but also in the torsion of the building against a large earthquake motion, and can provide a great damping effect.

  Since the overall shape of the device is a three-dimensional truss-like shape with a substantially triangular pyramid shape, it itself has a stable structure and is compactly attached to the corners of the column beam joints of existing buildings. be able to.

It is a perspective view which shows the state which attached the seismic reinforcement apparatus of this invention to the column beam junction part of the existing building. The basic form of the seismic reinforcement apparatus of this invention is shown as a principle figure. The example of the installation position in the case of installing the seismic reinforcement apparatus of this invention in a pencil building is shown, (a) is a horizontal sectional view, (b) is a vertical sectional view. It is a perspective view which shows the application example regarding the attachment form of the seismic reinforcement apparatus of this invention. It is a perspective view which shows the example of the other attachment form of the earthquake-proof reinforcement apparatus of this invention. It is a perspective view which shows the example of the further another attachment form of the seismic reinforcement apparatus of this invention. It is the horizontal sectional view which showed the case where a spacer is provided between beam side surfaces as another attachment form of the seismic reinforcement apparatus of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a view of a state in which the seismic reinforcement device 1 of the present invention is attached to a column beam joint of an existing building as viewed obliquely from below.

  This seismic reinforcement device 1 is composed of a total of six rod-like elements including two beam attachment members 2, one column attachment member 3, one horizontal damper 4, and two diagonal dampers 5. It is configured to be connected in a three-dimensional truss shape so as to form six sides of a triangular pyramid shape.

  In this example, as shown in the figure, the seismic reinforcement device 1 is installed at the entrance corner of the beam 12 in the two directions intersecting the pillar 11 of the existing building, and the column attachment member 3 is provided at the exit corner of the column 11. It is attached to the lower part of the two-way beam 12 where the two beam attachment members 2 intersect.

  The beam attachment member 2 and the column attachment member 3 are made of a rod-shaped steel material such as a shape steel, and the horizontal damper 4 and the oblique damper 5 are friction dampers, axial-yield hysteresis steel dampers, rod-like viscous dampers, or the like. It is done. As such a damper, an existing commercially available damper can be used, but it can be used by changing the structure of the joint as required.

  FIG. 2 shows a basic form of the seismic reinforcement device 1 as a principle diagram. In such a configuration, two beam attaching members 2, one column attaching member 3, and one horizontal damper 4 are provided. And two diagonal dampers 5 are arranged in a three-dimensional truss shape, so that they can function in any direction and exert a reinforcing effect as a reinforcing element that increases the rigidity of the beam-column joint. be able to.

  In addition, for large earthquake motions, the horizontal damper 4 and the diagonal damper 5 function not only in the horizontal and vertical vibrations but also in the torsion of the building, and can provide a great damping effect.

  The seismic reinforcement device 1 of the present invention is a three-dimensional truss-like shape in which the overall shape of the device is a substantially triangular pyramid shape. Can be mounted compactly. Depending on the structure of the existing building to be applied, the entire device or a part of the device can be stored in the ceiling, or can be hidden by a haunch-like interior.

  FIG. 3 shows an example of an installation position when the seismic reinforcement device 1 of the present invention is installed in a pencil building. In this example, it is attached to the beam-column joint on each floor of the existing building A, but it is applicable to install every other floor, every other floor, or on the upper floor of the existing building. An arrangement plan may be made according to the strength and vibration characteristics of the existing building.

  FIG. 4 is a view of an application example related to the mounting form of the seismic reinforcement device 1 of the present invention as viewed obliquely from above. In this application example, another seismic reinforcement device 1 is attached to the upper part of the seismic reinforcement device 1 in the embodiment of FIG. By arrange | positioning in this way, the two earthquake-resistant reinforcement apparatuses 1 can be attached to the one corner of a column beam junction part, and an earthquake-resistant effect can be heightened. Alternatively, the seismic effect equivalent to that of one seismic reinforcement device can be provided by two smaller seismic reinforcement devices.

  FIG. 5 shows an example of another attachment form of the seismic reinforcement apparatus 1 of the present invention. In the example of FIG. 1, the attachment position of the beam attachment member 2 is substantially the lower end position of the beam 12 at the beam-column joint, whereas in the example of FIG. Since it is in the vicinity of the beam forming intermediate position of the beam 12, the seismic reinforcement device 1 can be placed almost in the ceiling.

  FIG. 6 shows another example of the mounting configuration of the seismic reinforcement apparatus 1 of the present invention. When it is difficult to stably fix the beam attachment member 2 and the column attachment member 3 in the connection with the beam-to-column connection portion, as shown in FIG. The beam attachment member 2 and the column attachment member 3 may be fixed to the surfaces of the column 11 and the beam 12 via the flange-shaped fixing bracket 7.

  The flange-shaped fixing bracket 7 may be provided integrally with the beam attachment member 2 or the column attachment member 3, or is separate from the beam attachment member 2 or the column attachment member 3, and the flange-shaped fixing bracket is first provided. 7 may be fixed to the surfaces of the column 11 and the beam 12, and the beam attaching member 2 and the column attaching member 3 may be attached to the flange-like fixing bracket 7.

  FIG. 7 shows still another mounting form in which the beam width is larger than the beam width, and the beam-proof reinforcement device 1 is easily mounted when the protruding corner of the column 11 protrudes from the beam width of the beam 12. An example in which a spacer 8 is interposed between 12 side surfaces is shown.

  In this example, a plate-like spacer 7 in which a shape steel and a steel plate are combined is fixed to the side surface of the beam 12, and the beam attachment member 2 is attached to the beam 12 via the spacer 7.

DESCRIPTION OF SYMBOLS 1 ... Seismic reinforcement apparatus, 2 ... Beam attachment member, 3 ... Column attachment member, 4 ... Horizontal damper, 5 ... Diagonal damper, 6 ... Joint part, 7 ... Flange-shaped fixing metal fitting, 8 ... Spacer,
11 ... pillars, 12 ... beams,
A ... Existing building (Pencil building)

Claims (3)

A seismic reinforcement device for an existing building that is installed at a beam-column joint of an existing building and seismically strengthens the building, and includes a horizontal bi-directional beam attachment member that extends along two beams intersecting the beam-column joint A column attachment member extending upward or downward from an intersection of the two-way beam attachment members, a bar-shaped horizontal damper connecting between the distal ends of the two-direction beam attachment members, The column beam joint portion is formed by connecting a tip portion and two rod-shaped oblique dampers connecting between the tip portions of the two-way beam attachment members in a solid truss shape so as to form six sides of a substantially triangular pyramid shape. The horizontal damper and the oblique damper are configured to absorb vibration energy against vibrations greater than or equal to a predetermined value at the column-beam joint, and the beam attachment member and the Adjust the angle of the joint with the column attachment member in the joined state. And is severable joint, the horizontal damper and said oblique damper existing buildings for seismic reinforcement device, characterized in that there as a length-adjustable in a state of axial force does not act.   2. The existing building seismic reinforcement apparatus according to claim 1, wherein the beam attaching member and the column attaching member are made of a steel material in a bar shape or a plate shape. 3. The existing building seismic reinforcement apparatus according to claim 1 or 2 , wherein the horizontal damper and the oblique damper are friction dampers, axial-yield hysteresis steel dampers, or rod-like viscous dampers. Seismic reinforcement device.

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