Vibration damper and structure equipped with the same

Abstract

To provide a vibration control damper capable of efficiently absorbing energy of a vibration external force acting on a frame and exhibiting an effective damping action, and a frame provided with the same.SOLUTION: A vibration control damper 1 is provided inside a column-beam frame 5 constructed by joining a column 2 and a beam 3, and attenuates a vibration external force acting on the column-beam frame. The vibration control damper includes: a circular pipe member 6; a first plate 7 that has a first through hole 9 through which the circular pipe member penetrates at a base end part, has a first pin hole 11 for connection to an upper beam at a tip part, and is integrally joined and fixed to a central part in a longitudinal direction of the circular pipe member; and a pair of second plates 8 and 8 that each have a second through hole 12 through which the circular pipe member penetrates at a base end part, each have a second pin hole 14 for connection to a left column at the tip part, and are integrally joined and fixed to both ends in the longitudinal direction of the circular pipe member on both sides of the first plate. The first plate and the second plate occupy a position in which one is bent with respect to the other through the circular pipe member.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a vibration damper capable of efficiently absorbing vibration external forces acting on a structure and exerting an effective vibration damping action, and a structure provided with the same.

Background Art

[0002] As a vibration damper for attenuating vibration external forces acting on a building, for example, Patent Document 1 is known. In the "vibration damper" of Patent Document 1, a top plate and a base plate are arranged in parallel and spaced apart, and steel pipes are arranged between these plates while being rigidly joined to the top plate. And a displacement transmission portion provided on the base plate is engaged with a torsion plate fixed to the steel pipe. Then, when the top plate and the base plate are relatively displaced during an earthquake, the displacement amount is transmitted to the torsion plate as a rotational motion through the displacement transmission portion. Thereby, a torsional moment is applied to the steel pipe.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When the top plate and the base plate are relatively displaced during an earthquake, not only a torsional moment but also a shear force acts on the steel pipe. Since the vibration damper of the background art is not configured in anticipation of the shear force, it has been difficult to ensure an effective vibration damping action.

[0005] In the background art, both ends of a single steel pipe are sandwiched and welded between a central fixed plate and two torsion plates on both sides such that the two torsion plates cover the ends of the steel pipe. The welding between the steel pipe and the torsion plates is limited to one side of the torsion plates, and at the same time, the welding needs to be performed from the side of the steel pipe, making the welding operation extremely difficult and it being difficult to ensure quality.

[0006] The steel pipe is blocked by the torsion plates on both sides, and the steel pipe can only be observed from the outside, making it difficult to grasp the degree of damage to the steel pipe.

[0007] The top plate and the base plate are arranged in parallel, and are installed at a predetermined position of the building through studs and braces. The studs etc. must have a cross-sectional performance greater than that of a vibration damping damper, resulting in the problem of the need for very large studs etc. or an increase in cost.

[0008] When large inter-story deformation occurs in the building, there is a risk that the steel bars engaging the torsion plates as displacement transmission parts will come off.

[0009] Since the vertical displacement of the above steel bars is not restricted and they move freely, they cannot absorb the vertical vibration energy.

[0010] The present invention was conceived in view of the above conventional problems, and an object thereof is to provide a vibration damping damper capable of efficiently absorbing vibration external forces acting on a structure and exhibiting an effective vibration damping effect, and a structure equipped with the same.

Means for Solving the Problems

[0011] The vibration damping damper according to the present invention is provided inside a structure constructed by joining a column and a beam, and is a vibration damping damper that attenuates vibration external forces acting on the structure. The vibration damping damper includes a circular tube member, a first through hole through which the circular tube member passes and which is provided at a base end portion, a first pin hole for connecting to a first predetermined position of the structure at a tip end portion, and a first plate integrally joined and fixed to a central portion in the length direction of the circular tube member. The vibration damping damper further includes a pair of second plates each having a second through hole through which the circular tube member passes at a base end portion, a second pin hole for connecting to a second predetermined position of the structure at a tip end portion, and each integrally joined and fixed to both ends in the length direction of the circular tube member on both sides of the first plate. The first plate and the second plates occupy positions where one is bent with respect to the other via the circular tube member.

[0012] The first plate and the second plates that occupy positions bent with respect to each other are characterized in that an axis of the first plate connecting the center of the first through hole and the center of the first pin hole intersects an axis of the second plate connecting the center of the second through hole and the center of the second pin hole.

[0013] The first plate and each of the pair of second plates are characterized in that they are equidistantly spaced in the length direction of the circular tube member.

[0014] The length direction ends of the circular tube member respectively protrude from the second through holes of the pair of second plates.

[0015] The first plate and the second plates are characterized in that, in the length direction from the base end portions of the first and second through holes toward the tip end portions of the first and second pin holes, the circumferences of the first and second through holes are formed wide, and the circumferences of the first and second pin holes are formed narrow.

[0016] The plate thickness of the first plate is thicker than the plate thickness of the second plates, and the plate thickness of the second plates is thicker than the wall thickness of the circular tube member.

[0017] The first plate, the pair of second plates, and the circular tube member are joined and fixed over the entire circumference of the first and second through holes on both sides of the first plate and both sides of each of the second plates.

[0018] In the structure provided with the vibration damping damper according to the present invention, the vibration damping damper is used, the first predetermined location is set on either the beam or the column, the second predetermined location is set on the other of the beam and the column, a first vibration damping damper connection member is joined and fixed to the first predetermined location, a second vibration damping damper connection member is joined and fixed to the second predetermined location, the first vibration damping damper connection member is pivotally pin-connected to the first pin hole of the first plate via a first pin, and the second vibration damping damper connection member is pivotally pin-connected to the second pin hole of the second plate via a second pin.

[0019] In the structure provided with the vibration damping damper according to the present invention, the vibration damping damper is used, the structure is constructed in a square shape by joining a pair of upper and lower beams to a pair of left and right columns, the first predetermined location is set on either one of a pair of upper inner corners and lower inner corners facing each other in the structure, the second predetermined location is set on the other of the upper inner corner and the lower inner corner, a first vibration damping damper connection member is joined and fixed to the first predetermined location, a second vibration damping damper connection member is joined and fixed to the second predetermined location, the first vibration damping damper connection member is pivotally pin-connected to the first pin hole of the first plate via a first pin, and the second vibration damping damper connection member is pivotally pin-connected to the second pin hole of the second plate via a second pin.

[0020] One of the first vibration damping damper connection member and the second vibration damping damper connection member is a brace, and the other is a joining bracket unit.

[0021] The structure provided with the vibration damping damper according to the present invention uses the above vibration damping damper, wherein the first predetermined position is set on either the upper beam or the lower beam, the second predetermined position is set on the other of the upper beam and the lower beam, either the upper part or the lower part of the intermediate column is joined and fixed to the first predetermined position, either the upper part or the lower part of the intermediate column is joined and fixed to the second predetermined position, either the upper part or the lower part of the intermediate column is rotatably pin-connected to the first pin hole of the first plate via a first pin, and the other of the upper part or the lower part of the intermediate column is rotatably pin-connected to the second pin hole of the second plate via a second pin.

[0022] The structure provided with the vibration damping damper according to the present invention uses the above vibration damping damper, and the structure is configured with a pier instead of the column and a bridge instead of the beam. The first predetermined position is set on either the bridge or the pier, the second predetermined position is set on the other of the bridge and the pier, a first vibration damping damper connecting member is joined and fixed to the first predetermined position, a second vibration damping damper connecting member is joined and fixed to the second predetermined position, the first vibration damping damper connecting member is rotatably pin-connected to the first pin hole of the first plate via a first pin, and the second vibration damping damper connecting member is rotatably pin-connected to the second pin hole of the second plate via a second pin.

Effect of the Invention

[0023] In the vibration damping damper according to the present invention and the structure provided therewith, it is possible to efficiently absorb the vibration external force acting on the structure and exhibit an effective vibration damping effect.

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0025] Hereinafter, preferred embodiments of the vibration damper according to the present invention and the structure provided with the same will be described in detail with reference to the accompanying drawings.

[0026] As shown in FIG. 1, the vibration damper 1 according to the present embodiment is provided inside a rectangular column - beam structure 5 (see FIGS. 9 and 10) made of steel frame, reinforced concrete, steel - frame reinforced concrete, or wood, which is constructed by joining a pair of upper and lower beams 3 (only the upper beam is shown in the illustrated example) to a pair of left - and - right columns 2 (only the left column is shown in the illustrated example) at the column - beam joint 4.

[0027] The illustrated example is a steel - frame column - beam structure 5, and the beam 3 is made of I - shaped steel and the column 2 is made of a hollow steel pipe.

[0028] When the column - beam structure 5 is vibrated and deformed by lateral vibration external forces in the left - and - right horizontal direction or vertical vibration external forces in the up - and - down vertical direction generated during an earthquake or the like, the vibration damper 1 absorbs and attenuates the energy of the vibration external forces.

[0029] Exemplifying the steel frame column and beam structure 5, the vibration damping damper 1 will be described below. As shown in FIGS. 1 to 3, the vibration damping damper 1 is configured as a unit component including one circular tube member 6, one first plate 7, and a pair of second plates 8, 8.

[0030] The circular tube member 6 is formed of a steel hollow cylindrical body. Both ends in the length direction of the circular tube member 6 are opened as openings 6a so that the inside of the circular tube member 6 can be visually recognized.

[0031] The first plate 7 is a steel plate having a length and a width, and is formed with an outer contour in which the width dimension of the base end portion 7a, which is one end side in the length direction, is wide and the width dimension of the tip end portion 7b, which is the other end side in the length direction, is narrow.

[0032] In the illustrated example, the outer contour of the first plate 7 is formed in an oval shape in which the width dimension is gradually narrowed from the base end portion 7a toward the tip end portion 7b.

[0033] At the base end portion 7a of the first plate 7, a first through hole 9 through which the circular tube member 6 passes is formed at the same center as the center of the circular tube member 6. The outer contour of the base end portion 7a of the first plate 7 is concentric with the center C1 of the first through hole 9 and is formed to include an arc portion having an outer diameter larger than the inner diameter of the first through hole 9.

[0034] At the tip end portion 7b of the first plate 7, a first pin hole 11 through which a first pin 10 described later is inserted is formed. The outer contour of the tip end portion 7b of the first plate 7 is concentric with the center C2 of the first pin hole 11 and is formed to include an arc portion having an outer diameter larger than the inner diameter of the first pin hole 11.

[0035] Therefore, the first plate 7 is formed wide around the first through hole 9 and narrow around the first pin hole 11 in the length direction from the base end portion 7a where the first through hole 9 is formed toward the tip end portion 7b where the first pin hole 11 is formed.

[0036] Furthermore, the first plate 7 is formed symmetrically with respect to the axis P1 of the first plate 7 connecting the center C1 of the first through hole 9 and the center C2 of the first pin hole 11.

[0037] Similar to the first plate 7, the second plate 8 is a steel plate having a length and a width, and is formed with an outer contour in which the width dimension of the base end portion 8a at one end side in the length direction is wide and the width dimension of the tip end portion 8b at the other end side in the length direction is narrow.

[0038] In the illustrated example, the outer contour of the second plate 8 is formed in an oval shape in which the width dimension is gradually narrowed from the base end portion 8a toward the tip end portion 8b.

[0039] At the base end portion 8a of the second plate 8, a second through hole 12 through which the circular pipe member 6 passes is formed at the same center as the center of the circular pipe member 6. The outer contour of the base end portion 8a of the second plate 8 is concentric with the center C3 of the second through hole 12 and is formed to include an arc portion having an outer diameter larger than the inner diameter of the second through hole 12.

[0040] At the tip end portion 8b of the second plate 8, a second pin hole 14 through which a second pin 13 described later is inserted is formed. The outer contour of the tip end portion 8b of the second plate 8 is concentric with the center C4 of the second pin hole 14 and is formed to include an arc portion having an outer diameter larger than the inner diameter of the second pin hole 14.

[0041] Therefore, with respect to the length direction of the second plate 8 from the base end portion 8a where the second through hole 12 is formed toward the tip end portion 8b where the second pin hole 14 is formed, the periphery of the second through hole 12 is formed wide and the periphery of the second pin hole 14 is formed narrow.

[0042] Furthermore, the second plate 8 is formed symmetrically with respect to the axis P2 of the second plate 8 connecting the center C3 of the second through hole 12 and the center C4 of the second pin hole 14.

[0043] The pair of second plates 8, 8 are made of the same material and the same dimensions and are formed identically. Also, with respect to the outer form excluding the plate thickness, it is desirable that the first plate 7 and the second plate 8 be formed identically, but they do not necessarily have to be identical.

[0044] Regarding the mutual relationship among the first plate 7, the second plate 8, and the circular tube member 6, the plate thickness of the first plate 7 is formed to be thicker than the plate thickness of the second plate 8, and the plate thickness of the second plate 8 is formed to be thicker than the wall thickness of the circular tube member 6. Preferably, the plate thickness of the first plate 7 is twice the plate thickness of the second plate 8.

[0045] The circular tube member 6 is sequentially penetrated through the second through-hole 12 of one second plate 8, the first through-hole 9 of the first plate 7, and the second through-hole 12 of the other second plate 8 in its length direction, and is provided on these first plate 7 and second plates 8, 8.

[0046] The first plate 7 is positioned between the pair of second plates 8, 8. The first plate 7 is disposed at the central portion in the length direction of the circular tube member 6.

[0047] The pair of second plates 8, 8 are respectively disposed on both sides of the first plate 7 at both end portions in the length direction of the circular tube member 6.

[0048] The first plate 7 and one second plate 8 and the first plate 7 and the other second plate 8 are arranged at an equal distance L apart in the length direction of the circular tube member 6 (see FIG. 2).

[0049] From the second through-holes 12, 12 of the pair of second plates 8, 8 on both sides, the end portions in the length direction of the circular tube member 6, that is, the tube end portions 6b, respectively protrude.

[0050] The first plate 7 and the pair of second plates 8, 8 are integrally joined and fixed to the circular tube member 6 by corner fillet welding W over the entire circumference around the first through-hole 9 and the entire circumference around the second through-hole 12, respectively.

[0051] The joint portions of these plates 7, 8 and the circular tube member 6 by this full-circumference corner fillet welding W are formed on both sides in the plate width direction of the first plate 7 and on both sides in the plate width direction of the second plate 8 as shown in FIG. 4.

[0052] It is desirable that the joint of the gusset weld W be formed so as to gently converge toward the outer peripheral surface 6c of the circular tube member 6 at least with respect to the circular tube member 6.

[0053] As described above, the vibration damping damper 1 is configured as a unitized component by joining and fixing the first plate 7 and the pair of second plates 8, 8 to the circular tube member 6.

[0054] As its outer shape, the vibration damping damper 1 is formed in a bent shape in which the first plate 7 and the second plate 8 are not arranged in a straight line or overlapped at the same position around the circular tube member 6.

[0055] That is, the vibration damping damper 1 is configured such that the first plate 7 and the second plate 8 occupy positions bent with respect to each other via the circular tube member 6.

[0056] Specifically, the first plate 7 and the second plate 8 are joined and fixed to the circular tube member 6 such that the axis P1 in the first plate 7 and the axis P2 in the second plate 8 intersect each other.

[0057] The mounting directions of the pair of second plates 8, 8 with respect to the circular tube member 6 are parallel to each other and in the same direction (not in a twisted position) where they overlap each other when viewed in the longitudinal direction of the circular tube member 6.

[0058] The vibration damping damper 1 configured as described above is provided inside the column-beam structure 5 described above. The first pin hole 11 of the first plate 7 of the vibration damping damper 1 is formed to connect to the first predetermined position of the column-beam structure 5.

[0059] In this embodiment, as shown in FIG. 1, the first predetermined position is set at the midpoint in the longitudinal direction (left - right horizontal direction) of the upper beam 3, which is one of the upper and lower beams, at a distance from the column - beam joint 4. The first pin hole 11 is pivotally pin - connected via a first pin 10 to a brace 15, which is a first vibration - damping damper connection member joined and fixed to the midpoint of the upper beam 3. In this way, the first pin hole 11 is connected to the first predetermined position of the upper beam 3 via the brace 15.

[0060] Also, the second pin hole 14 of the second plate 8 of the vibration - damping damper 1 is formed to connect to the second predetermined position of the column - beam structure 5.

[0061] In this embodiment, as shown in FIG. 1, the second predetermined position is set at the midpoint in the vertical height direction of the left column 2, which is one of the left and right columns, at a distance from the column - beam joint 4. The second pin hole 14 is pivotally pin - connected via a second pin 13 to a joining bracket unit 16, which is a second vibration - damping damper connection member joined and fixed to the midpoint of the left column 2. In this way, the second pin hole 14 is connected to the second predetermined position of the left column 2 via the joining bracket unit 16.

[0062] The brace 15 is composed of an H - shaped steel in the illustrated example. One end in the longitudinal direction is joined and fixed to the upper beam 3, and the other end in the longitudinal direction is connected to the first plate 7 via a first pin insertion hole 17.

[0063] As shown in FIGS. 5 - 7, at one end in the longitudinal direction of the brace 15, there are provided a steel joining plate 18 welded to a brace end face formed flat along the lower surface of the upper beam 3, and a pair of steel reinforcing ribs 19 welded to both sides of the brace 15 aligned with the web 15a of the brace 15 and welded to the joining plate 18.

[0064] The brace 15 is rigidly attached and fixed to the upper beam 3 by joining the joining plate 18 under the upper beam 3 with bolts 20.

[0065] At the other end of the brace 15 in the longitudinal direction, a pair of steel spacers 21 are provided so as to overlap both sides of the web 15a, and a pair of steel connecting plates 22 protruding outward from the brace 15 are provided so as to overlap each spacer 21. These pair of connecting plates 22 are joined to the web 15a with bolts and nuts 23 via the spacers 21 and provided with high rigidity.

[0066] A first pin insertion hole 17 is formed in the connecting plate 22. The brace 15 and the first plate 7 are pivotally connected to each other by inserting the tip portion 7b of the first plate 7 between the pair of connecting plates 22, aligning the first pin hole 11 and the pair of first pin insertion holes 17, and inserting and installing the first pin 10 through the first pin hole 11 and the first pin insertion holes 17.

[0067] As shown in FIGS. 1, 2, and 8, the joining bracket unit 16 is formed in a flat U-shape by joining a pair of left and right side plates 24a and a front plate 24b disposed between these side plates 24a. The front plate 24b is directed inward of the column-beam structure 5, and the three plates 24a and 24b are joined and fixed to the outer surface of the left column 2 to provide a plate assembly 24. The front plate 24b of the plate assembly 24 is provided with a pair of left and right connecting portions 25 corresponding to the pair of second plates 8.

[0068] Each of the connecting portions 25 includes a pair of steel spacers 26 provided at intervals in the vertical direction so as to form a gap Q therebetween, a pair of left and right connecting steel plates 27 disposed so as to sandwich the spacers 26 from both sides, and a pair of upper and lower steel reinforcing ribs 28 welded to either one of the connecting steel plates 27. These pair of connecting steel plates 27 are joined with bolts and nuts 29 via the upper and lower spacers 26 to form a high-rigidity structure.

[0069] Then, a pair of reinforcing ribs 28 of each connecting portion 25 and the connecting steel plate 27 to which the reinforcing rib 28 is joined are welded to the front plate 24b of the plate assembly 24 with high rigidity to form the joining bracket unit 16.

[0070] A second pin insertion hole 30 that communicates from one to the other is formed in the pair of connecting steel plates 27, 27.

[0071] For each connecting portion 25, 25, the joint bracket unit 16 and the pair of second plates 8, 8 insert the tip portion 8b of the second plate 8 between the pair of connecting steel plates 27, 27, align the second pin hole 14 and the second pin insertion hole 30, and insert and install the second pin 13 through the second pin hole 14 and the second pin insertion hole 30, whereby the pair of second plates 8, 8 are pivotally connected to the joint bracket unit 16 so as to be rotatable relative to each other.

[0072] Next, the operation of the vibration damping damper 1 according to the present embodiment and the column-beam structure 5 including the same will be described.

[0073] In manufacturing the vibration damping damper 1, first, the first plate 7 is joined and fixed to the central portion of the circular pipe member 6 by performing fillet welding W over the entire circumference of the first through hole 9 on both sides of the first plate 7.

[0074] Next, a pair of second plates 8, 8 are joined and fixed to both end portions of the circular pipe member 6 respectively by performing fillet welding W over the entire circumference of the second through hole 12 on both sides of the second plate 8.

[0075] At this time, the second plates 8, 8 are joined to the first plate 7 at a predetermined angle so that the vibration damping damper 1 forms a bent shape. Thus, the manufacturing of the vibration damping damper 1 is completed.

[0076] When the vibration damping damper 1 is provided in the column-beam structure 5, for example, the brace 15 is first joined and fixed to the first predetermined position of the upper beam 3.

[0077] Next, the connecting plate 22 of the brace 15 and the first plate 7 of the vibration damping damper 1 are pivotally connected by inserting the first pin 10 through their first pin insertion holes 14 and first pin holes 11 so as to be rotatable.

[0078] Thereafter, the joining bracket unit 16 is joined and fixed to the second predetermined location of the left column 2.

[0079] Finally, both the connecting steel plate 27 of the joining bracket unit 16 and the second plate 8 of the vibration damping damper 1 are pivotally pin - connected by inserting a second pin 13 through their second pin insertion holes 30 and second pin holes 14.

[0080] Thus, the column - beam structure 5 provided with the vibration damping damper 1 is constructed.

[0081] When vibration external forces such as an earthquake act on the column - beam structure 5, repeated deformation (strain) occurs in the column - beam structure 5. When deformation occurs in the column - beam structure 5, the force associated with this deformation is transmitted through the brace 15 and the joining bracket unit 16 and input into the vibration damping damper 1.

[0082] In the vibration damping damper 1, if the input from the first plate 7 and the second plate 8 acts in the circumferential direction of the circular tube member 6 (the first pin hole 11 and the second pin hole 14 move so as to approach and separate), due to the torsional moment generated between the first plate 7 and the second plate 8, the circular tube member 6 deforms and absorbs energy, and the vibration external force can be attenuated.

[0083] Also, if the input from the first plate 7 and the second plate 8 is a shear force acting in the radial direction of the circular tube member 6 from the horizontal lateral direction, the vertical longitudinal direction, and also the diagonal direction, the circular tube member 6 deforms and absorbs energy due to the shear force, and the vibration external force can be attenuated.

[0084] In this way, the vibration damping damper 1 can absorb energy against both torsional moment and shear force, and can efficiently exert the vibration damping effect.

[0085] Since the vibration damping damper 1 is connected to the column - beam structure 5 by pin - connection, all the forces generated in the column - beam structure 5 by the vibration external force can be smoothly transmitted to the circular tube member 6, and the vibration damping effect can be ensured efficiently and effectively.

[0086] Accordingly, the brace 15 and the joint bracket unit 16 are also less likely to be damaged, and their rigidity can be set to be small, achieving cost reduction.

[0087] The vibration damping damper 1 is configured such that the first plate 7 and the second plate 8 occupy positions where one is bent with respect to the other via the circular tube member 6. Specifically, since the axis P1 of the first plate 7 and the axis P2 of the second plate 8 are set to intersect, with this configuration as well, all of the forces generated in the column-beam structure 5 by the vibration external force can be surely borne by the circular tube member 6.

[0088] The first plate 7 and each of the pair of second plates 8, 8 are joined and fixed at an equal distance L in the length direction of the circular tube member 6. Therefore, the force can be transmitted to the circular tube member 6 without bias, and the vibration damping effect can be optimally exerted.

[0089] The plate thickness of the first plate 7 is thicker than that of one second plate 8, and the plate thickness of one second plate 8 is formed thicker than the wall thickness of the circular tube member 6. Thus, as a whole, the vibration damping damper 1 has excellent rigidity balance and can ensure optimal force transmission performance and energy absorption performance.

[0090] One circular tube member 6 is provided to penetrate through the first through hole 9 of the first plate 7 and the second through holes 12 of the pair of second plates 8, 8, and the length direction ends 6b, 6b of the circular tube member 6 are respectively protruded from the second through holes 12, 12 of the pair of second plates 8, 8.

[0091] The first plate 7, the pair of second plates 8, 8, and the circular tube member 6 are joined and fixed over the entire circumference of the first and second through holes 9, 12, 12 on both sides of the first plate 7 and on both sides of each of the second plates 8, 8.

[0092] Therefore, unlike the configuration in the background art where both ends of a single steel pipe are sandwiched and welded between a central fixed plate and two torsion plates on both sides, all of the weld joints of the circular pipe members 6 to the second plates 8, 8 and the weld joints of the circular pipe members 6 to the first plate 7 can be performed on both sides of these plates 7, 8, 8, and these weld joints that affect the performance of the vibration damping damper 1 can be easily and appropriately performed.

[0093] The circular pipe member 6 is formed of a steel hollow cylinder, and both ends in the length direction of the circular pipe member 6 are open at 6a, so the inside of the circular pipe member 6 can be easily visually recognized, and the presence or absence and degree of damage to the circular pipe member 6 can be surely judged.

[0094] And in the column-beam structure 5 provided with the vibration damping damper 1 according to the present embodiment, since the above-described vibration damping damper 1 can sufficiently absorb the energy of the vibration external force with high efficiency and appropriately attenuate it, an excellent vibration damping effect can be enjoyed.

[0095] Figures 9 and 10 show a modified example of the structure 31 provided with the vibration damping damper according to the present invention.

[0096] Figure 9 shows a case where the structure 31 is constructed in a square shape by joining a pair of upper and lower beams 3, 3a to a pair of left and right columns 2, 2a, the first predetermined location is set to either one of the column-beam joints 4 at any pair of upper inner corner portions and the column-beam joints 4a at the lower inner corner portions of the structure 31 facing each other, and the second predetermined location is set to the other of the column-beam joints 4 at the upper inner corner portions and the column-beam joints 4a at the lower inner corner portions.

[0097] In other words, it is a case where one diagonal brace 15 is provided across between the column-beam joints 4, 4a inside the square-shaped structure 31.

[0098] In the illustrated example, a brace 15 is joined and fixed to a column-beam joint 4 at the upper inner corner, which is a first predetermined location for connecting the first pin hole 11 of the vibration damping damper 1. A joint bracket unit 16 is joined and fixed to a column-beam joint 4a at the lower inner corner, which is a second predetermined location for connecting the second pin hole 14. The brace 15 is pin-connected to the first plate 7 via a first pin 10 so as to be rotatable, and the joint bracket unit 16 is pin-connected to the second plates 8, 8 via a second pin 13 so as to be rotatable.

[0099] This modification is different from providing the brace 15 and the joint bracket unit 16 at positions away from the column-beam joint 4 in the above-described embodiment. Instead, the brace 15 or the like is installed at or near the column-beam joints 4, 4a. Even in such a modification, it goes without saying that the same operational effects as those of the above-described embodiment can be achieved.

[0100] FIG. 10 shows a case where the above-described vibration damping damper 1 is incorporated into an interior column 32 within a framework 31.

[0101] In the illustrated example, a first predetermined location is set on the upper beam 3, and a second predetermined location is set on the lower beam 3a. The upper portion 32a of the interior column 32 is joined and fixed to the first predetermined location, and the lower portion 32b of the interior column 32 is joined and fixed to the second predetermined location. The upper portion 32a of the interior column 32 is pin-connected to the first plate 7 via a first pin 10 so as to be rotatable, and the lower portion 32b of the interior column 32 is pin-connected to the second plates 8, 8 via a second pin 13 so as to be rotatable.

[0102] Then, the vibration external force transmitted from the upper beam 3 and the lower beam 3a via the upper portion 32a and the lower portion 32b of the interior column 32 is energy-absorbed by the vibration damping damper 1, and the vibration damping effect on the framework 31 is exerted. Even in such a modification, it goes without saying that the same operational effects as those of the above-described embodiment can be achieved.

[0103] Furthermore, although not shown, the above-described vibration damping damper 1 may be applied to a bridge, which is a civil engineering structure.

[0104] In this case, regarding the structure shown in FIG. 1, the column 2 is replaced with a pier, and the beam 3 is replaced with a bridge girder.

[0105] The first predetermined location is set on the bridge girder, the second predetermined location is set on the pier, a first vibration damping damper connecting member such as a brace 15 is joined and fixed to the first predetermined location, and a second vibration damping damper connecting member such as a joining bracket unit 16 is joined and fixed to the second predetermined location. The first vibration damping damper connecting member is pivotally pin-connected to the first plate 7 via a first pin 10, and the second vibration damping damper connecting member is pivotally pin-connected to the second plates 8, 8 via a second pin 13.

[0106] Then, the vibration external force transmitted from the bridge girder and the pier via the first and second vibration damping damper connecting members is energy-absorbed by the vibration damping damper 1, and a vibration damping effect on the bridge is exerted. Even in such a modified example, it goes without saying that the same operational effects as those of the above-described embodiment are achieved.

Explanation of Reference Numerals

[0107] 1 Vibration damping damper 2, 2a Column 3, 3a Beam 4, 4a Column-beam joint 5 Column-beam structure 6 Circular pipe member 6b Pipe end portion of the circular pipe member 7 First plate 7a Base end portion of the first plate 7b Tip end portion of the first plate 8 Second plate 8a Base end portion of the second plate 8b Tip end portion of the second plate 9 First through hole 10 First pin 11 First pin hole 12 Second through hole 13 Second pin 14 Second pin hole 15 Brace 16 Joining bracket unit 31 Structure 32 columns Upper part of column 32a Lower part of column 32b Center of the first through hole C1 Center of the first pin hole C2 Center of the second through hole C3 Center of the second pin hole C4 Distance L between the first plate and the second plate Axis P1 of the first plate Axis P2 of the second plate

Claims

1. A vibration damping damper provided inside a structure constructed by joining columns and beams, for attenuating vibration external forces acting on the structure, comprising: A circular pipe member; having a first through hole through which the circular pipe member penetrates at a base end portion, and having a first pin hole at a tip end portion for connection to a first predetermined position of the structure, and a first plate integrally joined and fixed to a central portion in the length direction of the circular pipe member; each having a second through hole through which the circular pipe member penetrates at a base end portion, and each having a second pin hole at a tip end portion for connection to a second predetermined position of the structure, and a pair of second plates integrally joined and fixed to both ends in the length direction of the circular pipe member on both sides of the first plate; The vibration damping damper, wherein the first plate and the second plates occupy positions where one is bent relative to the other via the circular pipe member.

2. The vibration damping damper according to claim 1, wherein an axis of the first plate connecting the center of the first through hole and the center of the first pin hole and an axis of the second plate connecting the center of the second through hole and the center of the second pin hole intersect with each other for the first plate and the second plates occupying positions where one is bent relative to the other.

3. The vibration damping damper according to claim 1 or 2, wherein the first plate and each of the pair of second plates are spaced equidistantly in the length direction of the circular pipe member.

4. The vibration damping damper according to any one of claims 1 to 3, wherein end portions in the length direction of the circular pipe member respectively protrude from the second through holes of the pair of second plates.

5. The vibration damping damper according to any one of claims 1 to 4, wherein the first plate and the second plates are formed with a wide width around the first and second through holes and a narrow width around the first and second pin holes in a length direction from the base end portions of the first and second through holes toward the tip end portions of the first and second pin holes.

6. The plate thickness of the first plate is thicker than that of the second plate, and the plate thickness of the second plate is thicker than the wall thickness of the circular tube member. The vibration damping damper according to any one of claims 1 to 5, characterized in that.

7. The first plate, the pair of second plates, and the circular tube member are joined and fixed over the entire circumference of the first and second through holes on both sides of the first plate and both sides of each of the second plates. The vibration damping damper according to any one of claims 1 to 6, characterized in that.

8. The vibration damping damper according to any one of claims 1 to 7 is used. The first predetermined position is set on either the beam or the column, and the second predetermined position is set on the other of the beam and the column. A first vibration damping damper connecting member is joined and fixed to the first predetermined position, and a second vibration damping damper connecting member is joined and fixed to the second predetermined position. The first vibration damping damper connecting member is pivotally pin-connected to the first pin hole of the first plate via a first pin. The second vibration damping damper connecting member is pivotally pin-connected to the second pin hole of the second plate via a second pin. A structure provided with a vibration damping damper, characterized in that.

9. The vibration damping damper according to any one of claims 1 to 7 is used. The structure is constructed in a square shape by joining a pair of upper and lower beams to a pair of left and right columns. The first predetermined position is set on either one of a pair of upper corner portions and lower corner portions facing each other in the structure, and the second predetermined position is set on the other of the upper corner portion and the lower corner portion. A first vibration damping damper connecting member is joined and fixed to the first predetermined position, and a second vibration damping damper connecting member is joined and fixed to the second predetermined position. The first vibration damping damper connecting member is pivotally pin-connected to the first pin hole of the first plate via a first pin. A structure provided with a vibration damping damper, characterized in that the second vibration damping damper connecting member is pivotally pin-connected to the second pin hole of the second plate via a second pin.

10. The structure provided with a vibration damping damper according to claim 8 or 9, characterized in that one of the first vibration damping damper connecting member and the second vibration damping damper connecting member is a brace and the other is a joining bracket unit.

11. The vibration damping damper according to any one of claims 1 to 7 is used, wherein the first predetermined position is set on either the upper beam or the lower beam, and the second predetermined position is set on the other of the upper beam and the lower beam, either the upper part or the lower part of the intermediate column is joined and fixed to the first predetermined position, and the other of the upper part or the lower part of the intermediate column is joined and fixed to the second predetermined position, A structure provided with a vibration damping damper, characterized in that either the upper part or the lower part of the intermediate column is pivotally pin-connected to the first pin hole of the first plate via a first pin, and the other of the upper part or the lower part of the intermediate column is pivotally pin-connected to the second pin hole of the second plate via a second pin.

12. A bridge in which the vibration damping damper according to any one of claims 1 to 7 is used, wherein the bridge has bridge piers replacing the columns and a bridge deck replacing the beams, the first predetermined position is set on either the bridge deck or the bridge pier, and the second predetermined position is set on the other of the bridge deck and the bridge pier, a first vibration damping damper connecting member is joined and fixed to the first predetermined position, and a second vibration damping damper connecting member is joined and fixed to the second predetermined position, the first vibration damping damper connecting member is pivotally pin-connected to the first pin hole of the first plate via a first pin, A bridge provided with a vibration damper, characterized in that the second vibration damper connection member is pivotally connected to the second pin hole of the second plate via a second pin so as to be rotatable.

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