Vibration-damping structure

Abstract

To transmit the force received by the movement restriction portion to the column-beam frame portion, by suppressing the complexity of the structure and the increase in cost.SOLUTION: The vibration-damping control structure includes a damper mounting portion 7 disposed at the tip of a brace 5, a vibration-damping damper 6 attached to the damper mounting portion 7 in a posture extending horizontally, a movement restriction portion 8 disposed at allowable range from the damper mounting portion 7 in the horizontal direction and restricting horizontal movement of the damper mounting portion 7 that exceeds the allowable range, and a collision force transmission portion 9 connected to a column 2 and transmitting a collision force to the column 2 when the damper mounting portion 7 and the movement restriction portion 8 come into contact. The movement restriction portion 8 extends to the collision force transmission portion 9 along the material axis of the damper mounting portion 7 and is composed of a compression member that transmits the collision force when the damper mounting portion 7 and the movement restriction portion 8 come into contact by a compression force.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a vibration control structure provided with braces and vibration dampers for a column-beam structure composed of columns and beams.

Background Art

[0002] In a building having a plurality of floors, by providing braces for reinforcing the column-beam structure and vibration dampers for absorbing the sway of the building for a plurality of column-beam structures, the seismic performance and vibration control performance of the building are improved.

[0003] However, when a major earthquake exceeding expectations occurs, for example, a specific floor such as the weakest floor may be excessively deformed and excessive inter-story displacement may occur, which may have a great impact on the building.

[0004] Therefore, regarding the displacement amount in the horizontal direction of the braces and vibration dampers during an earthquake, those that allow displacement within a preset allowable range and regulate displacement exceeding that allowable range have been proposed (see, for example, Patent Documents 1 and 2).

[0005] In Patent Document 1, in a column-beam structure, an inverted V-shaped brace is disposed on a lower structure, a damper attachment portion is provided at the upper end portion of the inverted V-shaped brace, and a vibration damper is provided in a posture extending horizontally at the damper attachment portion. On the upper structure, a movement restricting portion is disposed at a preset allowable interval from the damper attachment portion in the horizontal direction.

[0006] When the relative displacement of the upper structure with respect to the lower structure during an earthquake is smaller than the preset relative displacement amount within the allowable range, the horizontal displacement generated in the upper structure is absorbed by the damping force of the vibration damper, and the relative displacement between the lower structure and the upper structure is reduced. On the other hand, when the relative displacement of the upper structure with respect to the lower structure exceeds the preset relative displacement amount within the allowable range, the damper attachment portion abuts against the movement restricting portion, and the relative displacement of the upper structure is suppressed by braces or the like.

[0007] In Patent Document 2, in the column-beam framework, a V-shaped brace is arranged, a damper attachment part is provided at the lower end of the V-shaped brace, and a vibration control damper is provided in a posture extending horizontally at the damper attachment part. A tension member made of PC steel material or a tie rod is provided in parallel with the vibration control damper, and a fixing part of the tension member has a gap that allows displacement in the tension direction of the vibration control damper, and functions as an elasto-plastic damper in a state where a tensile force is applied.

[0008] When seismic motion acts on a building during a major earthquake, displacement in the tension direction of the vibration control damper acts, and the gap provided in the tension member disappears. When the gap disappears, the tension member acts as an elasto-plastic damper, and by adding the bearing capacity of the tension member to the building structure between the floors of the building, excessive inter-story displacement is suppressed.

Prior Art Documents

Patent Documents

[0009]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0010] In Patent Document 1, when the relative displacement of the superstructure with respect to the substructure exceeds the relative displacement amount within a preset allowable range, the damper attachment part is brought into contact with the movement restriction part. At this time, the fulcrum of the movement restriction part is near the upper end of the damper attachment part. Therefore, the fulcrum of the movement restriction part and the material axis of the damper attachment part do not coincide, and secondary forces are applied to the beam provided with the movement restriction part, which may cause local damage to the beam or may make it impossible to expect the original movement restriction effect of the movement restriction part.

[0011] In this regard, in Patent Document 2, when the tensile force of the vibration damping damper is applied to the tension member, it is possible to align the force point of the tension member with the member axis of the damper attachment portion. Therefore, in Patent Document 2, unlike Patent Document 1, it is possible to avoid the disadvantages that local damage may occur to the beam or the original movement restriction effect by the movement restriction portion may not be expected.

[0012] However, in Patent Document 2, since the force is transmitted to the columns and the like in the column-beam framework portion by the tensile force of the tension member, a large number of tension members are required to transmit sufficient force, leading to a complication of the structure and an increase in cost.

[0013] In view of this actual situation, the main problem of the present invention is to provide a vibration damping structure that can prevent local damage to the beam or the original movement restriction effect by the movement restriction portion from being lost, suppress the complication of the structure and the increase in cost, and transmit the force received by the movement restriction portion to the column-beam framework portion.

Means for Solving the Problems

[0014] A first characteristic configuration of the present invention is a vibration damping structure provided with a brace and a vibration damping damper for a column-beam framework portion composed of a column and a beam, a damper attachment portion disposed at the tip of the brace, the vibration damping damper attached to the damper attachment portion in a posture extending in the horizontal direction, a movement restriction portion disposed at a distance within an allowable range from the damper attachment portion in the horizontal direction and restricting horizontal movement exceeding the allowable range of the damper attachment portion, a collision force transmission portion connected to the column and transmitting the collision force when the damper attachment portion and the movement restriction portion come into contact to the column, wherein the movement restriction portion extends along the member axis of the damper attachment portion to the collision force transmission portion and is composed of a compression member that transmits the collision force when the damper attachment portion and the movement restriction portion come into contact as a compressive force.

[0015] According to this configuration, since the movement restricting portion is disposed at an interval within an allowable range from the damper mounting portion in the horizontal direction, horizontal movement within the allowable range of the damper mounting portion is permitted. Thus, for example, in a minor or moderate earthquake, the damper mounting portion can be horizontally moved within the allowable range, and the sway of the building can be absorbed by the damping damper. On the other hand, in a major earthquake exceeding the assumption, the damper mounting portion attempts to horizontally move beyond the allowable range, but the horizontal movement beyond the allowable range is restricted when the damper mounting portion abuts against the movement restricting portion. Since the impact force when the damper mounting portion and the movement restricting portion abut is transmitted to the column by the impact force transmitting portion, excessive deformation of the column-beam frame portion can be suppressed, and it is possible to prevent the inter-story displacement from becoming excessive.

[0016] Moreover, according to this configuration, since the movement restricting portion extends to the impact force transmitting portion along the material axis of the damper mounting portion, the force point of the movement restricting portion when the damper mounting portion and the movement restricting portion abut can be made to coincide with the material axis of the damper mounting portion. Thereby, it is possible to prevent a secondary force from being applied to the beam, suppress the possibility of causing local damage to the beam or the like, and suppress the inability to expect the original movement restricting effect by the movement restricting portion.

[0017] Furthermore, according to this configuration, since the movement restricting portion is constituted by a compression member that transmits the impact force when the damper mounting portion and the movement restricting portion abut as a compressive force, as in Patent Document 2, many tension members are not required, the complexity of the configuration and the cost increase can be suppressed, the force received by the movement restricting portion can be appropriately transmitted to the column-beam frame portion, excessive deformation of the column-beam frame portion can be suppressed, and it is possible to appropriately prevent the inter-story displacement from becoming excessive.

[0018] The second characteristic configuration of the present invention is that, in plan view, the impact force transmitting portion is provided with enlarged portions that are enlarged on both sides in the beam width direction compared to the movement restricting portion. The vibration damping damper is attached to the enlarged portion of the impact force transmission portion at the end opposite to the damper attachment portion, and is arranged in parallel on both sides in the beam width direction with the movement restricting portion interposed therebetween in a plan view.

[0019] According to this configuration, since the vibration damping dampers are arranged in parallel on both sides in the beam width direction with the movement restricting portion interposed therebetween, it is possible to efficiently utilize the limited space and arrange two vibration damping dampers and one movement restricting portion in a well-balanced manner, while making the force point of the movement restricting portion coincide with the material axis of the damper attachment portion when the damper attachment portion and the movement restricting portion come into contact. Moreover, since the vibration damping damper is attached to the enlarged portion enlarged in the beam width direction in the impact force transmission portion, the impact force transmission portion can be used as the member to which the vibration damping damper is attached, and the configuration can be simplified.

[0020] The third characteristic configuration of the present invention is that the beam is constituted by a haunch beam having downward extension portions extending the both end portions thereof downward. The downward extension portion of the beam is connected to the movement restricting portion.

[0021] According to this configuration, since the downward extension portion of the beam is connected to the movement restricting portion, the buckling resistance of the movement restricting portion can be improved.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0023] An embodiment of the vibration damping structure according to the present invention will be described with reference to the drawings. In this vibration damping structure 1, as shown in FIG. 1, a brace 5 and a vibration damping damper 6 (for example, an oil damper) are provided for a column-beam frame portion 4 composed of a column 2 and a beam 3. Such a vibration damping structure 1 is applied to a plurality of column-beam frame portions 4 that are continuous in the vertical direction in a building having a plurality of floors. Incidentally, FIG. 1 shows the column-beam frame portion 4 in a specific floor to which the vibration damping structure 1 is applied.

[0024] The brace 5 is composed of, for example, H-shaped steel, and as shown in FIG. 1, is arranged in an inverted V shape having a pair of braces 5. Each of the pair of braces 5 is provided in a posture inclined obliquely toward the central side from the joint portion between the column 2 and the beam 3 (the lower corner portion of the column-beam frame portion 4). The lower end portion 5b of the brace 5 is connected to a brace connecting portion 51 provided at the joint portion between the column 2 and the beam 3 (the lower corner portion of the column-beam frame portion 4), and the upper end portion 5a of the brace 5 is connected to a damper mounting portion 7.

[0025] As shown in FIG. 1, the damper mounting portion 7 is arranged below the central side portion 31 of the beam 3 in the beam length direction X while being spaced apart from the beam 3 by a predetermined distance in the vertical direction. The damper mounting portion 7 has a long upper side portion 71 and a short lower side portion 72 in the beam length direction X. The lower side portion 72 is provided in a state of protruding downward from the central portion of the upper side portion 71 in the beam length direction X. A vibration damping damper 6 is attached to the upper side portion 71 of the damper mounting portion 7 in a posture along the beam length direction X, and the upper end portions 5a of the pair of braces 5 are connected to the lower side portion 72 of the damper mounting portion 7.

[0026] As shown in FIG. 1, the damper mounting portion 7 and the vibration damping damper 6 are arranged at the same position in the vertical direction, and vibration damping dampers 6 are arranged on both the left and right sides in a state of extending from the damper mounting portion 7 on the central side in the beam length direction X to both the left and right sides.

[0027] In this vibration damping structure 1, as shown in FIGS. 1 and 2, in addition to the brace 5, the vibration damping damper 6, and the damper mounting portion 7, a movement restricting portion 8 and a collision force transmitting portion 9 are provided. The movement restricting portion 8 restricts horizontal movement beyond an allowable range while allowing horizontal movement within the allowable range with respect to the horizontal movement of the vibration damping damper 6 and the damper mounting portion 7. The collision force transmitting portion 9 transmits the collision force when the damper mounting portion 7 and the movement restricting portion 8 come into contact to the column 2.

[0028] As shown in the enlarged view in the lower right in FIG. 2, the movement restricting portion 8 is disposed with a gap of an allowable range G between it and the damper mounting portion 7 in the beam length direction X (horizontal direction). Thereby, during an earthquake, the damper mounting portion 7 is allowed horizontal movement within the allowable range G, and in minor and moderate earthquakes, the damper mounting portion 7 is horizontally moved within the allowable range G, and the sway of the building is absorbed by the vibration damping damper 6. On the other hand, when a large earthquake beyond the assumption occurs, the damper mounting portion 7 attempts to horizontally move beyond the allowable range G. At this time, the damper mounting portion 7 comes into contact with the movement restricting portion 8, and horizontal movement beyond the allowable range G is restricted.

[0029] As shown in FIGS. 1 and 2, the movement restricting portion 8 is disposed on both the left and right sides in a state of sandwiching the damper mounting portion 7 on the central side in the beam length direction X. Thereby, horizontal movement of the damper mounting portion 7 beyond the allowable range G is restricted in either direction in the beam length direction X.

[0030] As shown in FIGS. 1 and 2, the collision force transmitting portion 9 is provided in a state of being continuous with the movement restricting portion 8 in the beam length direction X (horizontal direction), and its end portion is connected to the column 2. Thereby, the collision force transmitting portion 9 transmits the collision force when the damper mounting portion 7 and the movement restricting portion 8 come into contact along the beam length direction X (horizontal direction), and finally transmits the collision force to the column 2.

[0031] As shown in FIG. 2, the impact force transmission part 9 is provided with an enlarged part 91 that is enlarged on both sides in the beam width direction Y with respect to the movement restriction part 8 in a plan view. One end of the vibration damping damper 6 on the side opposite to the damper mounting part 7 is attached to the enlarged part 91 of the impact force transmission part 9. Thereby, in a plan view, the vibration damping dampers 6 are arranged in parallel on both sides in the beam width direction Y with the movement restriction part 8 interposed therebetween. Therefore, while the movement restriction part 8 can be arranged at the center in the beam width direction Y, the movement restriction part 8 and the two vibration damping dampers 6 can be arranged compactly and efficiently.

[0032] As shown in FIG. 1, a predetermined interval is formed between the central side part 31 of the beam 3 and the damper mounting part 7 in the vertical direction. On the other hand, the end side part 32 of the beam 3 is provided with a downward extending part 33 that extends downward. Thereby, the beam 3 is constituted by a cantilever beam having the downward extending part 33 that extends the end side part 32 downward. The downward extending part 33 in the beam 3 has a length equal to the sum of the movement restriction part 8 and the impact force transmission part 9 in the beam length direction X, and the lower end part of the downward extending part 33 is connected to the movement restriction part 8 and the impact force transmission part 9.

[0033] As described above, in the event of a major earthquake exceeding the assumption, the gap in the allowable range G (see FIG. 2) between the damper mounting part 7 and the movement restriction part 8 disappears, the damper mounting part 7 and the movement restriction part 8 come into contact with each other, and the impact force is transmitted from the movement restriction part 8 to the impact force transmission part 9. As shown in FIGS. 1 and 2, the movement restriction part 8 is constituted by a compression member that extends to the impact force transmission part 9 along the material axis of the damper mounting part 7 and transmits the impact force to the impact force transmission part 9 as a compression force.

[0034] As shown in Fig. 1, both the damper mounting portion 7 and the movement restricting portion 8 are provided in a posture along the beam length direction X (horizontal direction), and the center of the damper mounting portion 7 in the vertical direction coincides with or substantially coincides with the center of the movement restricting portion 8 in the vertical direction. As shown in Fig. 2, although the movement restricting portion 8 is formed to be narrow and is closer to the center side in the beam width direction Y with respect to the damper mounting portion 7, the center of the damper mounting portion 7 in the beam width direction Y coincides with or substantially coincides with the center of the movement restricting portion 8 in the beam width direction Y. In this way, the damper mounting portion 7 and the movement restricting portion 8 are provided in a continuously connected state in both the beam length direction X and the beam width direction Y.

[0035] The impact force transmission portion 9 is provided in a state extending from the movement restricting portion 8 to the column 2. As shown in Fig. 1, it extends to the column 2 in a state continuous with the movement restricting portion 8 in the beam length direction X. Similar to the movement restricting portion 8, it is extended to the column 2 along the material axis of the damper mounting portion 7.

[0036] As shown in Fig. 1, the three members of the damper mounting portion 7, the movement restricting portion 8, and the impact force transmission portion 9 are provided in a posture along the beam length direction X (horizontal direction), and the center of the damper mounting portion 7 in the vertical direction coincides with or substantially coincides with the center of the movement restricting portion 8 in the vertical direction and the center of the impact force transmission portion 9 in the vertical direction. As shown in Fig. 2, although the widths of the damper mounting portion 7, the movement restricting portion 8, and the impact force transmission portion 9 are different in the beam width direction Y, the center of the damper mounting portion 7 in the beam width direction Y coincides with or substantially coincides with the center of the movement restricting portion 8 in the beam width direction Y and the center of the impact force transmission portion 9 in the beam width direction Y. In this way, the damper mounting portion 7, the movement restricting portion 8, and the impact force transmission portion 9 are provided in a continuously connected state in both the beam length direction X and the beam width direction Y.

[0037] By providing the damper attachment part 7, the movement restriction part 8, and the collision force transmission part 9 in a continuously connected state in both the beam length direction X and the beam width direction Y, when a major earthquake beyond expectation occurs, the gap in the allowable range G (see Fig. 2) between the damper attachment part 7 and the movement restriction part 8 disappears, and when the damper attachment part 7 and the movement restriction part 8 come into contact, the collision force is sequentially transmitted to the movement restriction part 8 and the collision force transmission part 9, and finally, it is linearly transmitted to the column 2. Therefore, it is possible to suppress the occurrence of the possibility of applying secondary forces to the beam 3 and causing local damage to the beam 3, or the inability to expect the original movement restriction effect by the movement restriction part 8. The column-beam framework part 4 including the brace 5 can effectively suppress excessive deformation at that floor and excessive inter-story displacement by receiving the transmitted collision force.

[0038] In this way, by applying the vibration control structure 1 provided with the movement restriction part 8 and the collision force transmission part 9 in addition to the brace 5, the vibration control damper 6, and the damper attachment part 7 to a specific floor, such as the weakest floor, that is more likely to displace horizontally than other floors, it is possible to effectively suppress excessive inter-story displacement in the entire building having a plurality of floors.

[0039] As shown in Figs. 1 and 3, when the damper attachment part 7 moves horizontally, a beam width direction movement restriction part 10 that restricts movement in the beam width direction Y is provided. As shown in Fig. 3, the beam width direction movement restriction part 10 includes a beam side restriction member 101 that protrudes downward from the lower surface part of the beam 3 and a pair of damper attachment part side restriction members 102 that protrude upward from the upper surface part of the damper attachment part 7. The pair of damper attachment part side restriction members 102 are arranged in a state of sandwiching the beam side restriction member 101 in the beam width direction Y, and when the beam side restriction member 101 comes into contact with any of the pair of damper attachment part side restriction members 102, the movement of the damper attachment part 7 in the beam width direction Y is restricted.

[0040] Hereinafter, with reference to FIGS. 3 to 5, the specific configurations of the beam 3, the damper mounting portion 7, the movement restricting portion 8, and the collision force transmitting portion 9, which are composed of what members, will be described. Incidentally, regarding what constitutes these specific members, although they are shown in FIGS. 1 and 2, for the sake of easy viewing of the configurations of the beam 3, the damper mounting portion 7, the movement restricting portion 8, the collision force transmitting portion 9, etc., the reference signs are basically omitted.

[0041] Regarding the beam 3, as shown in FIG. 3, the central side portion 31 (see FIG. 1) of the beam 3 is composed of the first H-shaped steel H1, while as shown in FIGS. 4 and 5, the end side portion 32 (see FIG. 1) of the beam 3 is composed of a combination of a plurality of plates P4 to P6, P10 to P12. At the portion corresponding to the upper side of the movement restricting portion 8 in the end side portion 32 of the beam 3 (see FIG. 1), as shown in FIG. 4, the web of the H-shaped steel is formed by the fourth plate P4 extending in the vertical direction, and the flanges of the H-shaped steel are formed by the fifth and sixth plates P5, P6 extending in the beam width direction Y. At the portion corresponding to the upper side of the collision force transmitting portion 9 in the end side portion 32 of the beam 3 (see FIG. 1), as shown in FIG. 5, the web of the H-shaped steel is formed by the tenth plate P10 extending in the vertical direction, and the flanges of the H-shaped steel are formed by the eleventh and twelfth plates P11, P12 extending in the beam width direction Y.

[0042] As shown in FIG. 3, at the central side portion 31 of the beam 3, corresponding to the location where the beam width direction movement restricting portion 10 is disposed, a first plate P1 extending in the vertical direction in a posture along the beam width direction Y is disposed between the upper and lower flanges H1a of the first H-shaped steel H1.

[0043] Regarding the damper attachment part 7, as shown in FIG. 3, the upper part 71 is composed of the second H-shaped steel H2, and the lower part 72 is composed of the first cut T-member T1 with the upper flange of the H-shaped steel removed. By connecting the second H-shaped steel H2 and the first cut T-member T1, a "king" character-shaped cross-sectional shape with three extended parts, namely an upper end extended part, an upper and lower middle extended part, and a lower end extended part, extending in the beam width direction Y, is formed from a member extending in the vertical direction. The second H-shaped steel H2 and the first cut T-member T1 are provided with a second plate P2 for closing the outer part in the beam width direction Y. The second H-shaped steel H2 and the first cut T-member T1 are provided with a third plate P3 extending in the vertical direction along the beam width direction Y between the upper and lower flanges H2a of the second H-shaped steel H2 or between the lower flange H2a of the second H-shaped steel H2 and the flange T1a of the first cut T-member T1 corresponding to the connection location of the brace 5.

[0044] Regarding the movement restricting part 8, as shown in FIG. 4, by combining the fourth, seventh, eighth, and ninth plates P4, P7, P8, and P9, a "king" character-shaped cross-sectional shape with three extended parts, namely an upper end extended part, an upper and lower middle extended part, and a lower end extended part, extending in the beam width direction Y, is formed from a member extending in the vertical direction. The seventh plate P7 forms the upper end extended part, the eighth plate P8 forms the upper and lower middle extended part, and the ninth plate P9 forms the lower end extended part. The vibration damping damper 6 is disposed on the outer side in the beam width direction Y of the eighth plate P8.

[0045] As shown in FIG. 4, the end side part 32 of the beam 3 is provided with a downward extended part 33 extending downward, and the end side part 32 of the beam 3 and the downward extended part 33 are integrally formed by a fourth plate P4 extending in the vertical direction. The fourth plate P4 extends below the downward extended part 33 of the beam 3, and the movement restricting part 8 is also integrally formed in accordance with the end side part 32 of the beam 3 and the downward extended part 33. In this way, using the fourth to ninth plates P4 to P9, the end side part 32 of the beam 3, the downward extended part 33, and the movement restricting part 8 are integrally formed, facilitating the formation of these respective members.

[0046] Regarding the impact force transmission part 9, as shown in FIG. 5, by combining the 10th, 13th, 14th, and 15th plates P10, P13, P14, and P15, it is formed into a "king" - shaped cross - sectional shape having three extended parts: an upper - end extended part, an upper - and - lower - middle extended part, and a lower - end extended part that extend in the Y direction (beam width direction) from a member extending in the vertical direction. The 13th plate P13 forms the upper - end extended part, the 14th plate P14 forms the upper - and - lower - middle extended part, and the 15th plate P15 forms the lower - end extended part. As shown in FIGS. 2 and 5, between the movement restriction part 8 and the impact force transmission part 9, a 16th plate P16 with a narrow upper side and a wide lower side is arranged.

[0047] As shown in FIG. 5, at the end - side part 32 of the beam 3, a downward - extended part 33 extending downward is provided, and the end - side part 32 of the beam 3 and the downward - extended part 33 are integrally formed by the 10th plate P10 extending in the vertical direction. The 10th plate P10 extends below the downward - extended part 33 of the beam 3, and in accordance with the end - side part 32 of the beam 3 and the downward - extended part 33, the impact force transmission part 9 is also integrally formed. In this way, using the 10th to 15th plates P10 - P15, the end - side part 32 of the beam 3, the downward - extended part 33, and the impact force transmission part 9 are integrally formed, facilitating the formation of these members.

[0048] As shown in FIG. 2, at the end of the damper mounting part 7, a 17th plate P17 is arranged, and at the end of the impact force transmission part 9, a 16th plate P16 is arranged. The vibration - damping damper 6 is provided in a state spanning the 17th plate P17 and the 16th plate P16. The vibration - damping damper 6 connects its ends to the 17th plate P17 and the 16th plate P16 by bolt fastening or the like. The side of the 17th plate P17 on the damper mounting part 7 side is a hollow space, and the side of the 16th plate P16 on the impact force transmission part 9 side is a hollow space. Thereby, during the bolt - fastening operation, these hollow spaces can be used as a working space, simplifying the connection operation of the vibration - damping damper 6.

[0049] 〔Alternative Embodiment〕 Another embodiment of the present invention will be described. Note that the configurations of the embodiments described below are not limited to being applied individually, but can also be applied in combination with the configurations of other embodiments.

[0050] (1) In the above embodiment, the pair of braces 5 are arranged in an inverted V shape. However, for example, the pair of braces 5 can also be arranged in a V shape. In this case, in FIG. 1, a damper mounting portion 7, a movement restricting portion 8, a collision force transmitting portion 9, etc. can be arranged on the lower beam 3 side.

[0051] (2) In the above embodiment, the beam 3, the damper mounting portion 7, the movement restricting portion 8, and the collision force transmitting portion 9 are configured by combining a plurality of members such as H-shaped steel, cut T members, and plates. However, the members used can be appropriately changed.

Explanation of Reference Numerals

[0052] 1 Vibration damping structure 2 Column 3 Beam 4 Column-beam framework portion 5 Brace 6 Vibration damping damper 7 Damper mounting portion 8 Movement restricting portion 9 Collision force transmitting portion 33 Lower side extended portion 91 Enlarged portion

Claims

1. In a vibration damping structure provided with braces and vibration damping dampers for a column-beam framework composed of columns and beams, a damper attachment portion disposed at the tip of the brace, the vibration damping damper attached to the damper attachment portion in a posture extending in the horizontal direction, a movement restricting portion disposed at a distance within an allowable range from the damper attachment portion in the horizontal direction and restricting horizontal movement exceeding the allowable range of the damper attachment portion, a collision force transmission portion connected to the column and transmitting the collision force when the damper attachment portion and the movement restricting portion come into contact to the column, The movement restricting portion is extended to the collision force transmission portion along the material axis of the damper attachment portion, and is configured by a compression member that transmits the collision force when the damper attachment portion and the movement restricting portion come into contact as a compression force. A vibration damping structure.

2. In plan view, the collision force transmission portion is provided with an enlarged portion enlarged on both sides in the beam width direction from the movement restricting portion, The vibration damping damper has an end portion on the side opposite to the damper attachment portion attached to the enlarged portion of the collision force transmission portion, and is arranged in parallel on both sides in the beam width direction with the movement restricting portion interposed therebetween in plan view. The vibration damping structure according to claim 1.

3. The beam is configured by a haunch beam having downward extension portions extending the both end portions thereof downward, The downward extension portion of the beam is connected to the movement restricting portion. The vibration damping structure according to claim 1 or 2.

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