JP2011149153A - Vibration control structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration control structure which inexpensively and surely reduces deformation of the whole building during earthquakes, while inhibiting restrictions from being imposed on a building plan by a vibration control damper. <P>SOLUTION: The vibration control damper 4, which is interposed between a column 2 and a beam 3, includes: a corrugated plate-like damper body 40 which is made of a low-yield-point steel material formed in a corrugated shape in a cross-sectional view and has a ridge portion of the corrugated shape arranged in the direction of elongation along a beam axis direction; a column-side mounting portion 41 which is joined to one end in the ridge-portion elongation direction of the damper body 40 and mounted on the column 2; and a beam-side mounting portion 42 which is joined to the other end in the ridge-portion elongation direction of the damper body 40 and mounted on the end of the beam 3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vibration control structure in which a vibration damper is interposed between a beam end and a column.

  2. Description of the Related Art In recent years, as a global environmental problem, a dry-type beam-to-column connection structure that draws less carbon dioxide and can be easily assembled and disassembled has attracted attention. As a method for dry connection of columns and beams, the method using bolts is generally used. However, in this method, the rigidity of the joint is lower than that of the welding method, and the deformation of the entire building during an earthquake may increase. There is.

  Therefore, there is a vibration control structure in which a vibration damper is installed at the beam-column joint in order to suppress the overall deformation of the building. As such a vibration damping structure, conventionally, one using a cane type vibration damping damper, one using a viscoelastic structural damping damper, one using a damping damper made of a damping alloy plate, and an axial direction It is known to use a damping damper from a low yield point steel plate whose shape is intentionally changed.

  As a damping structure using the above-mentioned brace type damping damper, for example, as described in Patent Document 1 below, the lower surface of the beam end and the outer peripheral surface of the column upper portion (upper portion of the column interlayer portion) There is a configuration in which a cane type vibration damper is installed between the two. This cane-type damping damper is a damper made of a plate material such as a steel plate, and is disposed along the vertical plane including the beam axis and is disposed at the corner between the beam end and the column upper portion. In such a vibration damping structure, it is possible to resist the vibration stress in the beam axis direction by the axial force of the above-mentioned wand type damping damper, and as a result, it is possible to reduce deformation of the entire building during an earthquake.

  Moreover, as a damping structure using the above-described viscoelastic system vibration damper, for example, as described in Patent Document 2 below, a viscoelastic system vibration is provided between the lower surface of the beam end and the outer peripheral surface of the column upper part. Some have a damper installed. In this viscoelastic system vibration damper, a first plate is suspended from the lower surface of the beam end portion, and a second plate is projected from the outer peripheral surface of the column upper portion so as to face the first plate, The viscoelastic body is interposed between the first and second plates. In such a damping structure, energy can be absorbed by generating shear strain in the viscoelastic body, and as a result, deformation of the entire building during an earthquake can be reduced.

  Moreover, as a damping structure using the damping damper which consists of an above-mentioned damping alloy plate, for example as described in the following patent document 3, it is between the lower surface of a beam end part, and the outer peripheral surface of a column upper part. There is a configuration in which a damping damper made of a twin type damping alloy plate is interposed. The twin-type damping alloy described above is an alloy in which the metal itself absorbs vibration, and twins are easily generated when a load is applied, and the twins move easily. It is an alloy having properties. In a damping structure having a damping damper made of such a damping alloy, when vibration energy (kinetic energy) is input to the damping damper, the vibration energy is converted into thermal energy by the generation and movement of the twins described above. Is converted to As a result, the vibration input to the building is attenuated, and deformation of the entire building during an earthquake can be reduced.

  Moreover, as a damping damper from a low yield point steel plate whose axial shape is intentionally changed, for example, a damping damper is used from a constricted low yield point steel plate whose intermediate portion in the axial direction is narrower than both ends. There is. In the vibration damping structure using such a vibration damper, the low yield point steel plate yields with respect to tension, and energy is stably absorbed. Therefore, it is possible to reliably reduce the deformation of the building in which the damping damper is pulled. Moreover, since stress concentrates on the constricted part (constriction part) of the damping damper, energy absorption by the damping damper is improved.

JP 2003-261993 A JP 2005-220614 A JP 2007-211184 A

  However, in the conventional vibration damping structure using the above-mentioned cane-type vibration damper or viscoelastic vibration damper, the plate-shaped vibration damper includes a beam axis at the corner between the beam end and the column. It is arranged along the vertical plane, and the corners between the beam end and the top of the column are closed with vibration damping dampers. There is a problem that the construction plan is restricted by the damping damper.

  Further, in the conventional vibration damping structure using the above-described viscoelastic structural vibration damper and the above-described vibration damper made of the vibration damping alloy plate, the viscoelastic body and the vibration damping alloy are expensive. In the case of installation at a location, there is a problem that the cost becomes remarkably high.

  In addition, the damping damper from the low yield point steel plate with a constricted shape tends to buckle in the out-of-plane direction of the low yield point steel plate against compression, so if a large compressive force acts on the damping damper, the damping damper There is a case where the energy absorption performance may not be exhibited due to buckling, and there is a problem that the energy equivalent to that of tension cannot be absorbed stably. That is, in the vibration damping structure including the above-described vibration damping damper, there are cases where the deformation of the building cannot be reduced due to the overall buckling of the vibration damping damper.

  The present invention takes the above-described conventional problems into consideration, and suppresses the restriction of the building plan by the vibration damper, and can reliably reduce the deformation of the entire building at the time of earthquake at a low cost. The purpose is to provide goods.

  The vibration damping structure according to the present invention is disposed between the column and the end of the beam so as to have a corrugated cross-sectional view and is arranged in a direction in which the corrugated crest extends along the beam axis direction. Corrugated plate-like damper main body made of low yield point steel, column-side mounting portion attached to one end of the damper main body in the direction in which the mountain portion extends, and a peak of the damper main body A vibration damper having a beam side attachment portion that is joined to the other end portion in the partial extending direction and attached to the end portion of the beam is interposed.

In the damping structure with such characteristics, when the structure is displaced between layers by the earthquake or the beam vibrates up and down and the column and the end of the beam rotate relatively, the rotation follows the rotation, The damper body of the damping damper made of low yield point steel is deformed in the beam axis direction. As the damper main body is axially deformed in this way, vibration energy is absorbed and vibration input to the structure is attenuated.
Further, the above-described damper main body portion is a corrugated plate-like member formed in a corrugated cross-sectional view, and the corrugated crest portion is disposed in a direction extending along the beam axis direction. Compared to the members, the buckling rigidity against the compressive force along the beam axis direction is high, and it is possible to exert the compressive strength equivalent to the tensile strength. Therefore, vibration energy is stably absorbed by the damping damper not only during tension but also during compression.

Further, in the vibration damping structure according to the present invention, the damper main body portion is formed in a corrugated waveform in a sectional view, and is disposed along the upper surface or the lower surface of the flange of the beam. Of the plurality of crest portions of the damper main body portion, the curvature radius of the crest portion convex to the flange side is larger than the curvature radius of the crest portion convex to the opposite side of the flange side. It is preferable.
As a result, when a large compressive force in the beam axis direction is applied to the damping damper, the buckling deformation is suppressed by contacting the flange before the entire damper main body buckles.

According to the vibration damping structure of the present invention, since the damper main body of the vibration damping damper is axially deformed, the vibration energy input to the structure is absorbed and the vibration is attenuated. Can be reduced. In addition, the above-mentioned damper body has a high buckling rigidity, and the damping damper absorbs vibration energy stably during compression as well as during tension, so the deformation of the entire building during an earthquake can be reliably reduced. Can do.
Moreover, only the corrugated plate-like damping damper is provided at the corners between the column and the beam end, and the corners are hardly blocked, so the damping damper restricts the building plan. There are few things.
Moreover, since the damping damper which consists of a low yield point steel material is used, a damping structure can be provided at low cost.

It is a side view of the beam-column joint part of the damping structure for demonstrating embodiment of this invention. It is a longitudinal cross-sectional view between AA shown in FIG. It is a top view of the beam-column joint part of the damping structure for demonstrating embodiment of this invention. It is a longitudinal cross-sectional view of the damping damper for demonstrating embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a vibration damping structure according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the damping structure 1 is a structure in which a damping damper 4 is installed on a ramen structure composed of columns 2 and beams 3, and can attenuate vibrations caused by earthquakes and winds. It is a structure.

The above-described pillar 2 is a steel pillar made of a steel material, for example, a steel pipe pillar made of a square tube-shaped steel pipe.
The beam 3 described above is a steel beam made of steel, and specifically, a steel beam made of H-shaped steel. The end of the beam 3 is joined to the column 2 so as to be relatively rotatable. More specifically, the beam 3 is disposed with a gap between its end surface and the outer peripheral surface of the joint portion 20 of the column 2. A plurality of bolt holes (not shown) through which bolts 10 to be described later are inserted are formed in the web 30 at the end of the beam 3 at intervals in the vertical direction. Further, a gusset plate 11 that is superposed on the web 30 is provided on the outer peripheral surface of the joint portion 20 of the column 2 so as to protrude. The gusset plate 11 is formed with a plurality of bolt holes (not shown) aligned with the bolt holes of the web 30 described above. Bolts 10 such as high strength bolts are inserted into the bolt holes and the bolt holes of the web 30. By inserting and fastening, the center part of the web 30 at the end of the beam 3 in the height direction is dry-pin joined to the joint 20 of the column 2.

  A damping damper 4 that absorbs vibration energy input to the damping structure 1 is interposed between the pillar 2 and the end of the beam 3 described above. The vibration damper 4 is a steel damper having a damper main body portion 40 made of a plate-like low yield point steel material having a low yield point and high ductility, and the outer peripheral surface of the column 2 and the end portion of the beam 3 described above. Between the upper surface of the column 2 and between the outer peripheral surface of the column 2 and the lower surface of the end portion of the beam 3.

More specifically, as shown in FIGS. 1 to 3, the schematic configuration of the vibration damper 4 is as follows:
A column-side attachment portion 41 attached to the column 2, a beam-side attachment portion 42 attached to the end portion of the beam 3, and a damper main body portion 40 interposed between the column-side attachment portion 41 and the beam-side attachment portion 42. And.

  The column-side mounting portion 41 is a rectangular steel plate, is arranged vertically along the column surface (the outer peripheral surface of the column 2), and is joined to the column 2 with bolts 12. That is, the damping damper 4 is bolted to the beam 3 side surface of the upper end portion (a portion immediately below the joint portion 20) and the lower end portion (a portion immediately above the joint portion 20) of the column 2. Bolt holes (not shown) are formed respectively. In addition, the pillar-side mounting portion 41 is formed with a bolt hole (not shown) that communicates with the bolt hole of the pillar 2 described above. The column-side mounting portion 41 is fixed to the column 2 by inserting and fastening bolts 12 such as high-strength bolts into the bolt holes of the column-side mounting portion 41 and the bolt holes of the column 2.

  The beam-side attachment portion 42 is a bracket that is attached to the upper surface of the upper flange 31 of the beam 3 or the lower surface of the lower flange 32, and has a schematic configuration along the upper surface of the upper flange 31 or the lower surface of the lower flange 32 of the beam 3. A base plate 43 disposed on the upper surface of the base plate 43, and a rib plate 45 that stiffens the rise plate 44 and the base plate 43. The base plate 43 is joined to the upper flange 31 and the lower flange 32 of the beam 3 by bolts 13 such as high strength bolts. The rising plate 44 is disposed perpendicularly to the web 30 of the beam 3, is raised vertically to the base plate 43, and is welded to the base plate 43. The rising plate 44 is disposed at a position facing the column side mounting portion 41 in the beam axis direction. The rib plate 45 is raised vertically with respect to the base plate 43, extends along the beam axis direction of the beam 3, and is welded to the base plate 43 and the rising plate 44.

  The damper main body 40 is a corrugated plate-like member formed in a cross-sectionally arcuate waveform, and a plurality of semi-cylindrical mountain portions 47A and 47B are arranged in parallel and the plurality of mountain portions 47A. , 47B are formed in a shape arranged in a staggered direction. That is, the damper main body portion 40 includes a first peak portion 47A that is convex toward one side and a second peak portion 47B that is convex toward the other side (the opposite side of the one side). The first and second peak portions 47A and 47B are alternately arranged and continuously provided.

  The damper main body 40 having the above-described configuration is disposed along the upper surface of the upper flange 31 and the lower surface of the lower flange 32 of the beam 3 and extends along the beam axis direction. That is, the damper main body 40 is disposed in the direction in which the first and second peak portions 47A and 47B extend along the beam axis direction. And the above-mentioned pillar side attaching part 41 is welded and fixed to one end part of the length direction (the direction in which the peak portions 47A and 47B extend) of the damper main body part 40, and the length of the damper main body part 40 is fixed. The rising plate 44 of the beam side mounting portion 42 is welded and fixed to the other end portion.

  Further, as shown in FIG. 4, the first peak portion 47A and the second peak portion 47A described above are formed in different sizes in a cross-sectional view perpendicular to the beam axis. The curvature radius R1 of the first peak portion 47A convex in the direction of the flange 32 (flange side) is larger than the curvature radius R2 of the second peak portion 47B convex on the opposite side of the flange side. The tip surface of the first peak portion 47A is in contact with the upper surface of the upper flange 31 and the lower surface of the lower flange 32 of the beam 3.

Next, the operation of the vibration damping structure 1 having the above-described configuration will be described.
When vibration is input to the damping structure 1 due to an earthquake or the like and an interlayer displacement occurs in the damping structure 1 or the beam 3 vibrates up and down, the column 2 and the end of the beam 3 rotate relative to each other. The beam 3 undergoes axial deformation (compression deformation, tensile deformation). At this time, following the relative rotational deformation between the column 2 and the end of the beam 3, the damper main body portions 40 of the upper and lower vibration dampers 4 are deformed in the beam axis direction. Thus, when the damper main body portion 40 made of the low yield point steel material is axially deformed, the vibration energy is absorbed, and the vibration input to the damping structure 1 is attenuated.

  Moreover, the above-described damper main body 40 is a corrugated plate-like member formed in a cross-sectional waveform, and the corrugated peak portions 47A and 47B are arranged in a direction extending along the beam axis direction. The buckling rigidity against the compressive force along the beam axis direction is high, and the compressive strength equivalent to the tensile strength is exhibited. Therefore, even when the damping damper 4 receives a large compressive force, the damper main body portion 40 is unlikely to buckle out of plane, and the damping damper 4 is not limited not only when receiving a tensile force but also when receiving a compressive force. The vibration energy is stably absorbed by the vibration damper 4.

  In addition, among the plurality of peak portions 47A and 47B of the damper main body 40 described above, the radius of curvature R1 of the first peak portion 47A convex to the flange side is larger than the radius of curvature R2 of the second peak portion 47B. When a large compressive force in the beam axis direction is applied to the damping damper 4, the tip surface of the first peak portion 47 </ b> A is placed on the upper surface of the upper flange 31 or the lower surface of the lower flange 32 before the damper main body portion 40 is buckled as a whole. To touch. Thereby, the buckling deformation of the damper main-body part 40 at the time of compression is suppressed.

According to the damping structure 1 described above, the damper main body 40 of the damping damper 4 is axially deformed, so that the vibration energy input to the damping structure 1 is absorbed and the vibration is attenuated. It is possible to reduce deformation of the entire damping structure 1 at the time.
Moreover, since the above-described vibration damper 4 is disposed above the upper flange 31 and the lower flange 32 of the beam 3, maintenance, replacement, and repair can be easily performed, and the cost can be kept low. Can do.

Further, the above-described damper main body portion 40 has a corrugated plate shape, and the damper main body portion 40 has a high buckling rigidity, and the vibration damper 4 stably absorbs vibration energy not only during tension but also during compression. Therefore, the deformation of the entire damping structure 1 during an earthquake can be reliably reduced.
Moreover, since the above-described damper main body portion 40 has a corrugated plate shape, bending due to its own weight is reduced, so that the plate thickness of the damper main body portion 40 can be reduced. Thereby, weight reduction and cost reduction can be achieved.
Furthermore, when the damper main body 40 has a corrugated plate shape, the appearance is more beautiful than that of a flat plate shape.

  Further, among the plurality of peak portions 47A and 47B of the damper main body 40 described above, the curvature radius R1 of the first peak portion 47A convex to the flange side is larger than the curvature radius R2 of the second peak portion 47B. Since the upper flange 31 and the lower flange 32 suppress the buckling deformation of the damper main body 40 during compression, even if a large compressive force acts on the damping damper 4, the vibration energy absorbing function of the damping damper 4 is secured. The deformation of the entire damping structure 1 during an earthquake can be reliably reduced.

  Further, according to the above-described vibration damping structure 1, since the vibration damping damper 4 is only disposed at the corner portion between the column 2 and the end of the beam 3, the vibration damping damper 4 is provided with the vibration damping structure. There are few restrictions on 1 architectural plan. Particularly, since the damper main body 40 of the vibration damper 4 is disposed along the upper surface of the upper flange 31 of the beam 3 and the lower surface of the lower flange 32 of the vibration damper 4 described above, most of the corner portions are not provided. It is not blocked, and the impact on the architectural plan can be particularly reduced. In other words, since the damping damper 4 can be installed without considering the influence on the building plan, the damping damper 4 can be installed in as many places as necessary. As a result, the vibration of the damping structure 1 The damping constant can be greatly improved, and the degree of freedom in building planning and earthquake resistance can be achieved at the same time.

  Further, since the vibration damper 4 having the damper main body portion 40 made of the low yield point steel material is less expensive than the vibration damper made of the vibration damping alloy or the viscoelastic body, the vibration damping structure 1 is realized at a low cost. can do. Further, since the maximum damping performance of the steel material can be obtained by making the best use of the characteristics of the low yield point steel material, the amount of necessary steel material can be reduced, and the vibration damper 4 can be reduced in size and weight. As a result, the vibration damper 4 can be easily installed, replaced, repaired, etc., and the cost can be reduced.

As mentioned above, although embodiment of the damping structure which concerns on this invention was described, this invention is not limited to above-described embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the above-described embodiment, the damping damper 4 is installed on the upper surface of the upper flange 31 of the beam 3 and the lower surface of the lower flange 32, respectively. The damping damper 4 may be installed on the upper surface of the flange 32, or the damping damper 4 may be installed only on one of the upper flange 31 and the lower flange 32. Further, in the present invention, the vibration damper 4 can be interposed between the web 30 at the end of the beam 3 and the outer peripheral surface of the column 2.

  In the above-described embodiment, the column-side mounting portion 41 of the damping damper 4 is joined to the column 2 with the bolt 12 and the beam-side mounting portion 42 is joined to the beam 3 with the bolt 13. In the present invention, the column side mounting portion 41 and the beam side mounting portion 42 may be fixed to the column 2 and the beam 3 other than by bolting. For example, the column side mounting portion 41 and the beam side mounting portion 42 may be fixed to the column 2 or the beam. 3 may be welded.

  Further, in the above-described embodiment, the gusset plate 11 provided on the outer peripheral surface of the joint portion 20 of the column 2 and the web 30 at the end of the beam 3 are joined by the bolt 10, so that the column 2 and the beam However, in the present invention, the column 2 and the end of the beam 3 may be bonded by dry bonding of another structure. And a structure in which the end of the beam 3 is welded.

  Moreover, in the above-described embodiment, the pillar 2 is a steel pipe pillar made of a square tubular steel pipe, but the structure of the pillar in the present invention can be changed as appropriate. For example, it may be a steel column made of a steel frame such as H-shaped steel, a steel pipe concrete column filled with concrete inside the steel pipe, or a column of reinforced concrete or steel reinforced concrete. May be. In addition, as a mounting structure of the damping damper 4 in the case of a reinforced concrete or steel-framed reinforced concrete column, for example, a steel pipe is wound around the joint of the column, and the damping damper 4 is attached to the steel pipe via a gusset plate or the like. The structure, or the structure in which the gusset plate is embedded inside the column concrete and the damping damper 4 is attached to the gusset plate, or the anchor bolt is fixed in the column concrete and protrudes from the outer peripheral surface of the column. The structure etc. which fix the damping damper 4 to a pillar by fastening the damping damper 4 to an anchor bolt can be considered.

  In the above-described embodiment, the beam 3 is a steel beam made of H-shaped steel, but the structure of the beam in the present invention can be changed as appropriate. For example, it may be a steel beam made of channel steel or T-shaped steel, or a parallel chord truss beam (lattice) in which an upper flange material made of angle steel or the like and a lower flange material are connected by a web material such as flat steel. Beam) or strip plate beam, or a box beam in which the upper and lower ends of the grooved steel, lattice beam, strip plate beam, etc. arranged in parallel are connected by a connecting material such as flat steel. It may be. The present invention may also be a concrete-coated steel beam in which concrete is coated on a part or all of the steel beam. Furthermore, the present invention may be a beam other than a steel beam (steel beam), and may be a concrete beam such as a precast concrete beam. In the case of a concrete beam, the anchor bolt is fixed in the beam concrete and protrudes from the lower surface or the upper surface of the beam, and the vibration damper 4 is fastened to the anchor bolt to fix the vibration damper 4 to the beam. be able to.

  Further, in the above-described embodiment, the damper main body portion 40 of the damping damper 4 is formed into a corrugated waveform in a sectional view. However, the present invention changes the corrugated cross-sectional shape in the corrugated damper main body portion. For example, a damper main body formed in a V-shaped (mountain shape) waveform in a cross-sectional view may be used.

In the above-described embodiment, the curvature radius R1 of the first peak portion 47A convex to the flange side is larger than the curvature radius R2 of the second peak portion 47B convex to the opposite side of the flange side. In the present invention, the curvature radii R1 and R2 of both peak portions 47A and 47B can be made the same damper main body, or the curvature radius R1 of the first peak portion 47A convex on the flange side is the flange side. It is also possible to make the damper main body smaller than the curvature radius R2 of the convex second peak portion 47B on the opposite side.
In addition, the plate | board thickness of the damper main-body part in this invention, a wave number, and a curvature radius can be changed suitably, and it is possible to adjust maximum proof stress by adjusting these.

In addition, the present invention is not limited to the case where the above-described vibration damper 4 is installed at the time of construction of the structure, but when the above-mentioned vibration damper 4 is additionally installed on an existing structure to suppress vibration. Can also be applied.
In addition, the damping structure in the present invention may be a wooden structure, or may be a configuration in which the above-described damping damper 4 is installed between a wooden column and a wooden beam.

  In addition, in the range which does not deviate from the main point of this invention, it is possible to replace suitably the component in above-mentioned embodiment with a well-known component, and you may combine the above-mentioned modification suitably.

1 Damping structure 2 Column 3 Beam 4 Damping damper 31 Upper flange (flange)
32 Lower flange (flange)
40 Damper body 41 Column side mounting portion 42 Beam side mounting portions 47A and 47B Mountain portion R1 Curvature radius R2 Curvature radius

Claims (2)

  A corrugated plate made of a low-yield point steel material that is formed in a cross-sectional waveform between the column and the end of the beam and that is arranged in a direction in which the peak of the waveform extends along the beam axis direction. Joined to the damper main body, the column-side mounting portion attached to one end of the damper main body in the mountain extending direction, and attached to the column, and the other end of the damper main body in the mountain extending direction And a vibration damping damper provided with a beam side attachment portion attached to the end portion of the beam. The vibration damping structure according to claim 1,
The damper main body portion is formed in a waveform having a circular arc shape in a sectional view, and is disposed along the upper surface or the lower surface of the flange of the beam,
In a cross-sectional view perpendicular to the beam axis, of the plurality of crest portions of the damper main body portion, the curvature radius of the crest portion convex to the flange side is larger than the curvature radius of the crest portion convex to the opposite side of the flange side Damping structure characterized by being large.

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