JP2008223778A - Hysteretic damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact hysteretic damper, simple in structure, easy in manufacture, and easy in strength design. <P>SOLUTION: This hysteretic damper 1 is composed of a pair of plate parts 3a and 3b, and a connecting part 5 of a rectangular sold. The connecting part 5 is sandwiched by an end part of the plate parts 3a and 3b, and the plate parts 3a and 3b and the connecting part 5 are connected in a U shape. The plate parts 3a and 3b and the connecting part 5 are fixed by a penetrating bolt 9 and a nut 11. An end part on the opposite side of a joining part of the plate parts 3a and 3b with the connecting part 5 is joining parts 6a and 6b with an unillustrated structural member, and is provided with a bolt hole 7 to be joined with the structural member. The joining parts 6a sand 6b of the hysteretic damper 1 are joined to the structural member, and when receiving force from the structural member, the plate parts 3a and 3b are elastically plastically deformed, and energy is absorbed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a hysteretic damper and a damper structure that are simple in structure and compact.

Conventionally, braces and wands have been used to increase the earthquake resistance of gate-type structures with columns and beams. However, dampers may be provided on some of these structures to control the structures. is there. Examples of the damper include a hydraulic damper using fluid resistance, a friction damper using friction resistance, and a hysteretic damper using elastic-plastic deformation of a member. In particular, the hysteresis damper is excellent in cost and ease of handling.

Hysteretic dampers also have various structures, and conventionally known buckling-restrained braces are known as dampers attached to the braces. The buckling-restrained brace has a structure in which a steel material is embedded inside concrete. However, in such a system, the damper cannot be configured in a compact manner, and the replacement work cannot be simplified. For such a problem, (1) a hysteretic damper (Patent Document 1) formed by joining a cylindrical portion or a curved portion and a flat plate portion, and (2) a flat plate as a damper composed only of a steel material. There is a hysteretic damper composed of a flat plate portion and a curved portion (Patent Document 2).
JP 2001-207679 A JP 2006-52824 A

However, since the hysteretic damper of (1) absorbs energy by using plastic deformation of the cylindrical part or the curved part, the same shape can be obtained due to the influence of dimensional variation during joining and bending during the manufacture of the damper. It is difficult, and the deformation of the cylindrical portion or the curved portion is not constant even under the same conditions. In addition, since the cylindrical portion or the curved portion is deformed, there is a problem that it is difficult to design the strength of the damper. The hysteretic damper of (2) absorbs energy by elasto-plastic deformation of the curved portion and the flat plate portion. However, since the damper has many curved portions, it is difficult to bend at the time of manufacturing the damper and has the same shape. It is difficult to get a damper. Moreover, since the bending radius of the curved part more than a certain level is required, there is a problem that the damper itself becomes large.

The present invention has been made in view of such problems, and an object of the present invention is to provide a hysteretic damper and a damper structure that are easy to manufacture and strength design of a damper, and have a simple and compact structure.

In order to achieve the above-described object, the first invention provides a pair of flat plate portions that are provided opposite to each other, have different lengths, a connecting portion that connects ends of the flat plate portions, and the pair of flat plates. A hysteresis type damper comprising: a joint portion joined to another structural member at another end portion of the portion;

The flat plate portion and the connecting portion may be joined with a bolt, and the flat plate portion may be provided with a recess into which the connecting portion is fitted.

The flat plate portion and the connecting portion may be joined by welding. In this case, the mutually opposing surface of the flat plate portion and the side surface of the connecting portion may be welded, and the side surface of the flat plate portion and the upper and lower surfaces of the connecting portion may be welded.

The flat plate portion and the connecting material may be integrally formed by bending or forging. The joint has a bolt hole. In this case, a bolt may be inserted in advance into the bolt hole, and the joint portion may have a protruding portion that is wider than the flat plate portion, and the bolt hole may be provided in the protruding portion. Further, the flat plate portion may have a variable cross section in which one or both of the width and thickness of the flat plate portion are changed, and the strength of the flat plate portion and the connecting portion is partially changed by heat treatment or the like. Also good.

According to the first invention, since it is composed of a pair of flat plate portions and connecting portions, manufacturing is easy, and the flat plate portion of the damper is elastically plastically deformed to absorb energy. Therefore, a compact hysteresis type damper can be provided.

The second invention is a damper structure in which the opposing flat plate portions of the pair of hysteretic dampers are joined to the first structural member, and the other pair of flat plate portions are joined to the second structural member.

A spacer may be provided between the first structural member and the flat plate portion.

According to the second invention, it is possible to provide a damper structure in which the damper is compactly attached to the first structural member and the second structural member, and absorbs energy from the structural member by elastic-plastic deformation of the damper. .

ADVANTAGE OF THE INVENTION According to this invention, manufacture and intensity | strength design of a damper are easy, and a hysteresis type damper and damper structure with a simple and compact structure can be provided.

Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is a perspective view showing a hysteresis damper 1 according to the present embodiment, and FIG. 2 is a side view of the hysteresis damper 1. The hysteretic damper 1 includes a pair of flat plate portions 3a and 3b that do not have a curved portion, and a connecting portion 5 that is a rectangular parallelepiped. The flat plate portions 3a and 3b are connected by the connecting portion 5 so as to be substantially parallel. The flat plate portions 3a and 3b are elastically plastically deformed when receiving an external force, thereby absorbing energy and applying a damping force.

The connecting portion 5 is sandwiched between the end portions of the flat plate portions 3a and 3b, and the flat plate portions 3a and 3b and the connecting portion 5 are connected in a U-shape. The flat plate portions 3a and 3b and the connecting portion 5 are fixed by penetrating bolts 9 and nuts 11. The ends of the flat plate portions 3a and 3b on the opposite side to the joint portion with the connecting portion 5 are joint portions 6a and 6b with a structural member (not shown), and are provided with bolt holes 7 for joining with the structural member. It is done.

The flat plate portion 3 is not specified as long as it has a function of absorbing energy by elastic-plastic deformation, but may be carbon steel or stainless steel, for example. Moreover, the connection part 5 should just be able to connect a pair of flat plate part 3a, 3b also at the time of load input, and although a material is not specified, it may be carbon steel or stainless steel, for example. The thickness, length, and width of the flat plate portion 3 and the connecting portion 5 are set by calculation or the like according to the mounting state and use conditions.

FIG. 3 is a perspective view showing a state in which the hysteretic damper 1 is attached to the structural member, and FIG. 4 is a side view showing an attached state of the hysteretic damper 1 and the structural member. In FIG. 4, the bolts 21 and 27 and the nuts 23 and 29 used for joining the hysteretic damper 1 and the structural member are not shown. The bracket 17 as the first structural member is provided at the intersection of the column 13 extending in the vertical direction and the beam 15 extending in the horizontal direction. The bracket 17 extends in a diagonal direction of a quadrilateral formed by the columns 13 and the beams 15. The brace 19 as the second structural member has an outer dimension smaller than that of the bracket 17, and is provided on the diagonal line at the extended position of the bracket 17. The bracket 17 and the brace 19 are joined by a pair of hysteretic dampers 1. The bracket 17 and the brace 19 are made of a steel material having an H-shaped cross section.

A pair of hysteretic dampers 1 are opposed to each other, and one joint 6a of the hysteretic damper 1 and the bracket 17 are fastened by a bolt 21 and a nut 23, and the hysteretic damper 1 and the bracket 17 are joined. A spacer 25 is sandwiched between the other joint portion 6b of the hysteretic damper 1 and the brace 19, and the joint portion 6b and the brace 19 are fastened by a bolt 27 and a nut 29 penetrating the spacer 25. 1 and brace 19 are joined.

Although the method of joining the column 13, the beam 15, and the bracket 17 is not shown, they are joined by joining means such as welding joining and bolt joining.

The spacer 25 only needs to be able to join the brace 19 and the hysteretic damper 1, and the material is not specified, but may be carbon steel or stainless steel, for example.

In the present embodiment, the hysteretic damper 1 is mounted on the extension line of the brace 19 and shows the mounted state as the brace damper, but may be used as a shear link damper.

Next, the operation of the hysteresis damper 1 will be described. FIG. 5 is a diagram illustrating a state in which a force is applied to the brace 19 in the direction of the bracket 17 (the arrow direction in the drawing). As shown in FIG. 5, when the brace 19 receives a force in the direction of an arrow due to an earthquake or a wind, both the flat plate portions 3a and 3b are deformed so as to bend inward, which is the brace 19 side, and absorb the energy of the external force. . Here, the flat plate portion 3 a is deformed between the joint portion between the flat plate portion 3 a and the connecting portion 5 and the connecting portion 6 a between the flat plate portion 3 a and the bracket 17. The flat plate portion 3 b is deformed between a joint portion between the flat plate portion 3 b and the connecting portion 5 and a joint portion 6 b between the flat plate portion 3 b and the spacer 25.

Further, when a force is applied to the brace 19 in the direction shown in FIG. 5, the hysteretic damper 1 is deformed so as to bend inward, but there is a gap between the hysteretic damper 1 and the brace 19 due to the spacer 25. For this reason, the connecting portion side of the hysteresis damper 1 and the brace 19 do not contact even during deformation. That is, the hysteretic damper 1 is deformed without the deformation portion being restrained from other parts. Here, the thickness of the spacer 25 is designed based on the relative displacement between the brace 19 and the bracket 17, the size of the hysteretic damper 1, and the like.

FIG. 6 is a view showing a state in which a force is applied to the brace 19 in the direction opposite to the bracket 17 (the arrow direction in the figure). As shown in FIG. 6, when the brace 19 receives a force in the direction of an arrow due to an earthquake or a wind, the flat plate portions 3a and 3b are deformed so as to be bent outward, which is opposite to the brace 19, and the energy of the external force To absorb. Here, the flat plate portion 3 a is deformed between the joint portion between the flat plate portion 3 a and the connecting portion 5 and the connecting portion 6 a between the flat plate portion 3 a and the bracket 17. The flat plate portion 3 b is deformed between a joint portion between the flat plate portion 3 b and the connecting portion 5 and a joint portion 6 b between the flat plate portion 3 b and the spacer 25.

Further, when a force is applied to the brace 19 in the direction shown in FIG. 6, the hysteretic damper 1 is deformed so as to be bent outward, but the connecting portion side of the hysteretic damper 1 does not come into contact with other parts at the time of deformation. . That is, the hysteretic damper 1 is deformed without the deformation portion being restrained from other parts.

In addition, the cross-sectional shape of the deformed portion of the flat plate portion 3 may be constant, or may be a variable cross section in which one or both of the width and thickness of the flat plate portion are changed. That is, the cross-sectional area may be changed by changing the width and thickness of the flat plate portion of the deformed portion. For example, if a narrow portion is provided in a part of the deformation portion of the flat plate portion 3, when the force is applied to the flat plate portion 3, the narrow portion can be preferentially deformed. Can be adjusted. Further, if a contact plate or the like is welded to a part of the deformed portion of the flat plate portion 3 to reinforce, the deformation of the contact plate portion can be suppressed when a force is applied to the flat plate portion 3. The power can be adjusted.

A part of the flat plate part 3 and the connecting part 5 may be subjected to heat treatment such as partial quenching. For example, by performing partial quenching in the vicinity of the joint portion 6 and the joint portion 6 of the flat plate portion 3 and partially increasing the strength, when a force is applied to the flat plate portion 3, the yield of the heat-treated portion is suppressed. The part to be plastically deformed can be specified.

As described above, according to the present embodiment, the pair of flat plate portions 3 and the connecting portion 5 are the main components, and these are joined by the bolts 9. There is no bending process, and the structure is simple. Moreover, since the straight part of the flat plate part 3 is deformed, the design is easier than that of deforming the curved part or the cylindrical part. Furthermore, since the hysteretic damper 1 is attached within the entire thickness obtained by adding the thickness of the flat plate portion 3 and the height of the bolt 9 to the thickness of the bracket 17, it can be attached even in a narrow place. .

Next, a second embodiment will be described. FIG. 7 is a diagram showing a hysteretic damper 30 according to the second embodiment. In the following embodiment, components having the same functions as those of the hysteresis type damper 1 shown in FIG.

In the hysteretic damper 30, concave portions 31 a and 31 b are formed in the width direction of the flat plate portions 3 a and 3 b at the joint portions of the flat plate portions 3 a and 3 b with the connecting portion 5. The concave portions 31a and 31b have substantially the same width as the width of the connecting portion 5, and the connecting portion 5 is fitted into the concave portions 31a and 31b. The connecting portion 5 fitted to the flat plate portions 3a and 3b and the concave portions 31a and 31b is fixed by a bolt 9 and a nut 11 that pass therethrough.

When the joints 6a and 6b of the hysteretic damper 30 are joined to the structural member in the same manner as the hysteretic damper 1, and the force is received from the structural member, the flat plate portions 3a and 3b are elastically plastically deformed and absorb energy. At this time, since the connecting portion 5 is fitted in the recesses 31a and 31b, there is no slip between the connecting portion 5 and the flat plate portions 3a and 3b during deformation.

Thus, according to the second embodiment, the hysteresis damper 30 has the same effect as the hysteresis damper 1. Further, since the concave portion 31 and the connecting portion 5 are fitted, slip does not occur between the flat plate portions 3a and 3b and the connecting portion 5 during deformation. For this reason, the deformation amount of the flat plate portion 3 under the same load condition is constant, and the damping performance is stabilized.

FIG. 8 is a diagram illustrating a hysteresis damper 40 according to the third embodiment. In the hysteresis damper 40, the flat plate portions 3a and 3b and the connecting portion 5 are joined by welding. Welding is performed on contact portions between the opposing surfaces 43a and 43b of the flat plate portions 3a and 3b and the side surfaces 45a and 45b of the connecting portion 5. The welding method is not specified, but normal arc welding may be used.

When the joints 6a and 6b of the hysteretic damper 40 are joined to the structural member in the same manner as the hysteretic damper 1, and the force is received from the structural member, the flat plate portions 3a and 3b are elastically plastically deformed and absorb energy. At this time, since the connecting portion 5 is welded to the flat plate portions 3a and 3b, there is no slippage between the connecting portion 5 and the flat plate portions 3a and 3b during deformation.

Thus, according to the third embodiment, the hysteresis damper 40 has the same effect as the hysteresis damper 1. Further, since no slip occurs between the flat plate portions 3a, 3b and the connecting portion 5 during the deformation, the deformation amount of the flat plate portion 3 under the same load condition is constant, and the damping performance is stabilized. Furthermore, since it is not necessary to use the bolt 9 and the nut 11, the number of parts can be reduced.

FIG. 9 is a diagram illustrating a hysteresis damper 50 according to the fourth embodiment. FIG. 9A is a view of the hysteretic damper 50 as viewed from the connecting portion 5 side, and FIG. 9B is a side view of the hysteretic damper 50. The connecting portion 5 of the hysteretic damper 50 is wider than the flat plate portions 3a and 3b. The connecting portion 5 is sandwiched between the end portions of the flat plate portions 3a and 3b in a state of projecting to both sides in the width direction of the flat plate portions 3a and 3b, and is fixed by welding. Welding is performed on contact portions between the side surfaces 53a, 53b, 53c, 53d of the flat plate portions 3a, 3b and the upper and lower surfaces 55a, 55b of the connecting portion 5 protruding in the width direction of the flat plate portion 3.

When the joints 6a and 6b of the hysteretic damper 50 are joined to the structural member in the same manner as the hysteretic damper 1, and the force is received from the structural member, the flat plate portions 3a and 3b are elastically plastically deformed and absorb energy. At this time, the opposing surfaces of the flat plate portions 3a and 3b and the vicinity of the side surface of the connecting portion 5 are deformed portions. Therefore, if the vicinity is welded, the deformation may not be stabilized due to the influence of heat. However, the welded portion of the hysteretic damper 50 is the side surfaces of the flat plate portions 3a and 3b and the upper and lower surfaces of the connecting portion 5 protruding in the width direction of the flat plate portion 3, and is a portion that is not deformed. The deformation part is not affected by welding.

Thus, according to the fourth embodiment, the hysteresis damper 50 has the same effect as the hysteresis damper 1. Moreover, since the welding part of the hysteresis type damper 50 is a different part from the deformation | transformation site | part of flat plate part 3a, 3b, the deformation | transformation site | part of flat plate part 3a, 3b does not receive the heat influence by welding. For this reason, the deformation amount of the flat plate portion 3 under the same load condition is constant, and the damping performance is stabilized.

FIG. 10 is a diagram showing a hysteresis damper 60 according to the fifth embodiment. The hysteretic damper 60 includes a bolt 27 for joining with a structural member. The bolt 27 has a neck length longer than that between the flat plate portions 3 a and 3 b, and a bolt head portion is positioned between the flat plate portions 3 a and 3 b and is inserted into the bolt hole 7. In the hysteretic damper 60, the flat plate portions 3a, 3b and the connection 5 are joined by welding in a state where the bolt 27 is inserted into the bolt hole 7. Therefore, the bolt 27 has a structure that does not fall off from the hysteresis damper 60.

When the joints 6a and 6b of the hysteretic damper 60 are joined to the structural member in the same manner as the hysteretic damper 1, and when a force is received from the structural member, the flat plate portions 3a and 3b are elastically plastically deformed and absorb energy.

Thus, according to the fifth embodiment, the hysteresis damper 60 has the same effects as the hysteresis damper 1. Further, when the hysteretic damper 60 and the structural member are attached, the bolt 27 is inserted in advance and the fastening with the nut 29 is on the structural member side. Therefore, it is necessary to perform a nut fastening operation between the narrow flat plate portions 3a and 3b. There is no attachment work.

FIG. 11 is a diagram illustrating a hysteresis damper 70 according to the sixth embodiment. The flat plate portion 3 of the hysteretic damper 70 includes projecting portions 71a, 71b, 71c, 71d. The protrusions 71a and 71b are provided at the joint 6a of the flat plate portion 3a, and the protrusions 71c and 71d are provided at the joint 6b of the flat plate portion 3b. The projecting portions 71 project in the width direction of the flat plate portion 3. The bolt holes 7 are provided at the positions of the respective protrusions 71. That is, the bolt holes 7a and 7b are provided in the protruding portion 71b, the bolt holes 7c and 7d are provided in the protruding portion 71a, the bolt holes 7e and 7f are provided in the protruding portion 71d, and the bolt holes 7g and 7h are provided in the protruding portion 71c. The connecting portion 5 and the flat plate portions 3a and 3b are joined by welding.

When the joints 6a and 6b of the hysteretic damper 70 are joined to the structural member in the same manner as the hysteretic damper 1, and the force is received from the structural member, the flat plate portions 3a and 3b are elastically plastically deformed and absorb energy.

Thus, according to the sixth embodiment, the hysteresis damper 70 has the same effect as the hysteresis damper 1. Further, when the hysteretic damper 70 is attached to the structural member, the bolt hole 7 is located outside in the width direction of the flat plate portion 3, so that the tool 27 is used when inserting the bolt 27 into the bolt hole 7 or fastening the nut 29. Is easy and the mounting operation is simple.

FIG. 12 is a diagram illustrating a hysteresis damper 80 according to the seventh embodiment. Similar to the hysteresis damper 70, the hysteresis damper 80 includes a protrusion 71. Further, the flat plate portions 3a and 3b and the connecting portion 81 have an integral structure. That is, it is created by bending a single flat plate, and the flat portions 3 a and 3 b that are straight portions face each other in parallel, and the bent portion becomes the connecting portion 81. Note that the shape of the connecting portion 81 may be curved or U-shaped as long as the flat plate portions 3a and 3b are kept parallel.

When the joints 6a and 6b of the hysteretic damper 80 are joined to the structural member in the same manner as the hysteretic damper 1, and the force is received from the structural member, the flat plate portions 3a and 3b are elastically plastically deformed and absorb energy. At this time, since the connecting portion 5 is integral with the flat plate portions 3a and 3b, there is no slip between the flat plate portion 3 and the connecting portion 5 during deformation.

Thus, according to the seventh embodiment, the hysteresis damper 80 has the same effect as the hysteresis damper 1. Further, since no slip occurs between the flat plate portions 3a and 3b and the connecting portion 5 during the deformation, the deformation amount of the flat plate portion 3 under the same load condition is constant, and the damping performance is stabilized. Further, when the hysteretic damper 80 is attached to the structural member, the bolt hole 7 is located on the outer side in the width direction of the flat plate portion 3, so that the jig 27 is inserted into the bolt hole 7 and a tool is used when the nut 29 is fastened. Is easy and the mounting operation is simple. Furthermore, since the flat plate portions 3a and 3b and the connecting portion 81 have an integral structure, there is no need to join the flat plate portions 3a and 3b and the connecting portion 81, and the number of parts can be reduced.

As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

The perspective view of the hysteresis type damper 1 which concerns on 1st Embodiment. The side view of the hysteresis type damper 1. FIG. The perspective view which shows the attachment state to the structural member of the hysteresis type damper 1. FIG. The side view which shows the attachment state to the structural member of the hysteresis type damper 1. FIG. The figure which shows the deformation | transformation state of the hysteresis type damper. The figure which shows the deformation | transformation state of the hysteresis type damper. The side view of the hysteresis type damper 30 which concerns on 2nd Embodiment. The side view of the hysteresis type damper 40 which concerns on 3rd Embodiment. The side view of the hysteresis type damper 50 which concerns on 4th Embodiment. The side view of the hysteresis type damper 60 which concerns on 5th Embodiment. The perspective view of the hysteresis type damper 70 concerning 6th Embodiment. The perspective view of the hysteresis type damper 80 which concerns on 7th Embodiment.

Explanation of symbols

1, 30, 40, 50, 60, 70, 80 ......... Historical dampers 3a, 3b ......... Plate portion 5 ......... Connecting portions 6a, 6b ......... Joint portions 7a, 7b, 7c, 7d, 7e , 7f, 7g, 7h ......... Bolt hole 9 ......... Bolt 11 ......... Nut 13 ......... Column 15 ...... Beam 17 ......... Bracket 19 ......... Brace 21 ......... Bolt 23 ......... Nut 25 ......... Spacer 27 ......... Bolt 29 ......... Nuts 31a, 31b ......... Recesses 41a, 41b, 41c, 41d ......... Welding portions 43a, 43b ......... Faces 45a, 45b ......... Side 51a, 51b, 51c, 51d ......... welded parts 53a, 53b, 53c, 53d ..... side surfaces 55a, 55b ....... upper and lower surfaces 71 ....... projection part 81 ..... connecting part

Claims (14)

A pair of flat plate portions provided opposite to each other, each having a different length;
A connecting portion for connecting an end portion of the flat plate portion;
At the other end of the pair of flat plate portions, each joined to another structural member,
A hysteretic damper characterized by comprising: The hysteretic damper according to claim 1, wherein the flat plate portion and the connecting portion are joined by a bolt. The hysteretic damper according to claim 1, wherein the flat plate portion is provided with a recess into which the connecting portion is fitted. The hysteretic damper according to claim 1, wherein the flat plate portion and the connecting portion are joined by welding. The hysteresis type damper according to claim 4, wherein a surface of the flat plate portion facing each other and a side surface of the connecting portion are welded. The hysteresis type damper according to claim 4, wherein the side surface of the flat plate portion and the upper and lower surfaces of the connecting portion are welded. The hysteretic damper according to claim 1, wherein the flat plate portion and the connecting portion are integrally formed by bending or forging. The hysteretic damper according to claim 1, wherein the joint has a bolt hole. The hysteresis type damper according to claim 8, wherein a bolt is previously inserted into the bolt hole. The hysteretic damper according to claim 8, wherein the joining portion has a protruding portion that is wider than the flat plate portion, and the bolt hole is provided in the protruding portion. The hysteretic damper according to claim 1, wherein the flat plate portion has a variable cross section in which one or both of the width and thickness of the flat plate portion are changed. The hysteretic damper according to claim 1, wherein the flat plate portion and the connecting portion are partially changed in strength by heat treatment or the like. The opposing flat plate portions of the pair of hysteretic dampers according to claim 1 are joined to the first structural member,
A damper structure formed by joining another pair of flat plate portions to a second structural member. The damper structure according to claim 13, wherein a spacer is provided between the second structural member and the flat plate portion.

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