JPH04250278A - Skeleton having vibration controller - Google Patents

Abstract

PURPOSE:To control effectively the deformation of a vibration controller to a skeleton assembling the vibration controller compactly and to also pulsative maximum waves existing in the initial earthquake. CONSTITUTION:A lever 26 is faced to the side of a longitudinal member 12 to provide, a damper 30 is faced to the side of a horizontal member 14 to place, and one end and a middle part of the lever 26 mentioned above are pivoted on two positions of the side of the longitudinal member 12 at regular spaces. One end of the damper 30 is connected to the side of the horizontal member 14, and the other end of the damper 30 is connected to the other end of the lever 26. The lever 26 and the damper 30 are respectively positioned to approximately the insides of the longitudinal member and the horizontal member. According to the constitution, because most of the vibration controller can be accommodated in the side of the skeleton, an effective space surrounded by the skeleton is not narrowed. When a button pushing out damper is used, the deformation of the skeleton can be effectively controlled against pulsative maximum waves exceeding 25cm/sec.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a structure equipped with a vibration damping device, and in particular to the structure and arrangement of levers, dampers, etc. of a vibration damping device in a steel frame structure that undergoes large deformation when a horizontal load is applied. It is.

0002

[Prior Art] Conventional devices for suppressing deformation of frames include:
There are vibration damping devices that combine a damper and a lever, such as tuned mass dampers.

0003

[Problems to be Solved by the Invention] Conventional vibration damping devices using a combination of a lever and a damper aim to increase the horizontal displacement and motion speed by the ratio of the lever, thereby amplifying the damping resistance. Adoption of a combination with this has the drawback that the support structure that supports the damper, lever, etc. becomes large, which narrows the effective room space. Additionally, the use of tuned mass dampers is very effective in suppressing steady horizontal forces or aftershocks of the frame due to earthquakes. However, it cannot be said to be effective against the pulse-like maximum wave that exists relatively early in the earthquake motion. In particular, 25c
For earthquakes exceeding m/sec, the structure deforms to the extent of plastic deformation, causing a significant deviation in the tuning of the damper, which inevitably reduces the effectiveness of the damper. The problem to be solved by this invention is to provide a frame in which a vibration damping device consisting of a damper, a lever, etc. is assembled in a compact manner. An object of the present invention is to provide a frame equipped with a damping device that can effectively suppress vibrations.

0004

[Means for Solving the Problems] The invention of this application employs the following configuration as a means for solving the above problems. The structure of the present invention is such that in a frame constructed by combining a vertical member arranged in a vertical direction and a horizontal member arranged in a horizontal direction, a lever is disposed facing the side surface of the vertical member, A damper is placed facing the side surface, one end and the middle of the lever are pivotally supported at two positions spaced apart from each other on the side surface of the vertical member, one end of the damper is connected to the side surface of the horizontal member, and the other end of the damper is is connected to the other end of the lever, and the lever and the damper are located approximately within the side surfaces of the vertical member and the horizontal member when viewed from the side. In a preferred embodiment of the present invention, the frame is constructed by connecting a column steel frame and a beam steel frame at a joint at the end of the beam steel frame, and one end of the support arm is attached to a portion of the side surface of the column steel near the joint. is fixed, a lever is placed facing the side of the column steel frame over a part of the column steel frame that is further away from the joint part of the column steel frame than the other end of the support arm, and one end of the lever is connected to the other end of the support arm. Pivotally supported on the side of the part of the column steel frame that is further away from the joint than the part of
The middle part of the lever is pivotally supported at the lower part of the support arm, a damper is arranged facing the side surface of the part of the beam steel frame from the joint part, one end of the damper is connected to the side part of the beam steel frame, and the other end of the damper is The end is connected to the other end of the lever. The upper end of the support arm is fixed to the side of the column steel frame, and the lower part of the lever is pivoted to the beam steel frame via a supporting protrusion fixed by welding or the like to the side of the column steel frame, and the beam steel frame at one end of the damper is fixed. The connection to the side surface of the beam is done through a support piece fixed to the side surface of the beam steel frame by welding or the like.

[0005] In a frame constructed by joining a column steel frame and a beam steel frame at a joint at the end of the beam steel frame, if there is a member extending in a direction perpendicular to the frame surface near the joint, For example, a vertical portion extending approximately vertically,
It consists of a horizontal part that extends approximately horizontally, and an oblique part that extends diagonally to connect the vertical part and the horizontal part, with a shaft support in the middle and lower part of the vertical part, and a connection part with the damper at the end of the horizontal part. Use a certain amount of leverage. In a preferred embodiment of the present invention, a damper having so-called friction type hysteresis is used, in which the resistance force generated by the damper hardly changes depending on its stroke or deformation start position. For example, use an extruded lead damper. In a damper that absorbs external vibration energy through plastic deformation of the material, lead is used as the plastic material because recrystallization or recovery of crystal grains occurs at room temperature, and the recovery time is extremely short (several seconds or less). , and exhibits no metal fatigue phenomenon, and stable energy absorption ability can be obtained. In this specification, the frame surface of a frame consisting of vertical members (or column steel frames) and horizontal members (or beam steel frames) is considered, and the surface of the vertical members (or column steel frames) that is parallel to the frame surface is referred to as its "side surface." The surface of the horizontal member (or steel beam) that is parallel to the frame surface is called its "side surface." Furthermore, the term "beam steel frame" used in this specification includes trusses used as beams.

[0006]

[Function] In this invention, a lever is placed facing the side surface of the vertical member, a damper is placed facing the side surface of the horizontal member, and the lever is placed at two positions spaced apart from each other on the side surface of the vertical member. One end and the middle are pivotally supported, one end of the damper is connected to the side surface of the horizontal member, and the other end of the damper is connected to the other end of the lever, so that when viewed from the side, the lever and damper are inside the side surfaces of the vertical member and the horizontal member. Since the vibration damping device is substantially located at the same position, the vibration damping device consisting of the lever and the damper can be compactly housed within the side surface of the frame consisting of the vertical members and the horizontal members. By using a damper with friction type hysteresis, for example, an extruded lead damper, deformation of the frame can be effectively suppressed even in the case of seismic motions exceeding 25 cm/sec.

[0007]

[Example] An example of the present invention is shown in Figs. 1 to 3 as a steel structure that exhibits large deformation when a horizontal load is applied.
A steel frame building 10 used as a factory or the like, which is equipped with a large-span roof truss and equipped with crane girders CG at the top of both side walls in the girder direction, as shown in FIG. 1, will be explained as an example. The building 10 is usually built in a rectangular plan shape with a large length in the direction of the beams and a relatively short length in the direction between the beams, and both walls in the direction of the long beams are spaced at a predetermined interval in the direction of the building's beams. It includes a large number of large steel columns 11 erected in parallel, and each steel column 11 is connected in the girder direction with girders, braces, etc. Small steel column 1 made of H-shaped steel material
2 is erected at the outer part of the upper end of each steel column 11, and a crane girder CG made of high-strength steel with an H-shaped cross section is arranged at the inner upper end of each steel column 11 in the column direction. A large-span roof truss 16 consisting of an upper chord member 13, a lower chord member 14, a diagonal member 15a, a tie member 15b, etc. is installed between mutually opposing steel columns 12 on the side wall of the building 10.
is spanned, and both ends of the roof truss 16 are fixed to the steel columns 12. Each steel column 12 has an upper chord member 17, a lower chord member 18,
They are also connected in the row direction by a truss beam 19 made of diagonal members or the like. However, since the building 10 has many steel columns 11, 12, truss beams 19, etc. in the row direction, there is little risk of deformation even if a horizontal load is applied in the row direction during an earthquake or the like. On the other hand, since the building 10 only has two steel columns 12 and a roof truss 16 in the direction between the beams, there is a risk that the building 10 will be significantly deformed if a horizontal load is applied in the direction between the beams during an earthquake or the like.

Therefore, a vibration damping device 20 is attached to the frame consisting of the steel columns 12 and the roof truss 16, and the building (frame) 1
0 deformation is suppressed. As shown in FIGS. 2 and 3, support protrusions 21 are fixed by welding or the like to both sides of the steel column 12 below the lower chord member 18 in the column direction, and a support shaft 23 is provided at the bottom. The upper end of the arm 22 is connected to the supporting protrusion 2
1 by welding, etc. Support protrusions 24 are also fixed by welding or the like to both side surfaces of the lower part of the steel column 12 in the column direction near the upper end of the steel column 11, and a support shaft 25 is provided to protrude from the support protrusions 24. The lever 26 is, as shown in FIGS. 1 and 4,
It consists of a vertical part 26a, a horizontal part 26b, and an oblique part 26c connecting these parts, and there are shaft holes 26d and 26e in the center and lower part of the vertical part 26a, respectively, and a vertical groove 26f is formed in the end of the horizontal part 26b. , a shaft hole 26g is formed in a portion corresponding to the vertical groove 26f. As shown in FIG. 4, supports made of steel materials with an H-shaped cross section are provided on both sides of the lower chord member 14 with an H-shaped cross section, which constitutes a part of the roof truss 16, at a predetermined distance from the steel column 12 in the column direction. The piece 27 is fixed by welding or the like, and both ends of the diagonal member 28a are fixed to a gusset plate 28a fixed to the support piece 27 and the lower surface of the lower chord member 14. The support piece 27 is attached to the steel column 12 at its end.
A support piece 29 with a shaft hole on the side surface is fixed by welding or the like.

As shown in FIG. 5, the damper 30 is composed of a cylinder 31, a push rod 32, a bearing piece, etc. The cylinder 31 has a cylindrical opening 31 with a step 31a in the middle.
b, 31c, and a shaft support 31e is fixed to the end 31d by welding or the like, and a shaft hole 31f is provided in this shaft support 31e.
There is. The push rod 32 has a spherical bulge portion 32b approximately in the center of a cylindrical rod body 32a.
A lead layer 33 having a diameter equal to the inner diameter of the opening 31b is formed around the rod 32a including the opening 31b. Fit the hole of the bearing piece 34A into the left part of the rod 32a of the lead layer 33, and
A threaded portion formed near the left end of rod 2a is screwed into a screw hole formed in shaft support 32c, and shaft support 32c is attached to rod 32a so that its position can be adjusted along its longitudinal direction. Fix the adjustment position with a lock nut. Pivot support 32
A shaft hole 32d is formed in c. Bearing piece 34B
pass through the opening of the rod 32a on the right side of the lead layer 33,
A guide ring 32f is fixed to the right end of the rod 32a. The rod 32a with the bearing pieces 34A, 34B, the lead layer 33, the guide ring 32f, etc. attached is inserted into the openings 31b, 31c of the cylinder 31, and the bearing piece 34A is attached to the end of the cylinder 31 by screws, welding, etc. as appropriate. The damper 30 is constructed by fixing the damper 30 by the fixing means shown in FIG.

A large number of steel columns 11 with steel columns 12 attached to their upper ends are erected at predetermined positions, both ends of the roof truss 16 are fixed to the upper portions of the opposing steel columns 12, and then the center of the vertical portion 26a of the lever 26 is fixed. The lever 25 is supported so as to be rotatable about the support shaft 24 by fitting the support shaft 23 of the support arm 22 fixed to the steel column 12 into the shaft hole 26d. At the same time, the lower shaft hole 26e of the vertical portion 26a of the lever 26 is fitted into the support shaft 25 of the support projection 24 fixed to the steel column 12, and the lever 26 is supported so that it can rotate around the support shaft 25. do. Insert the part of the shaft hole 31f of the shaft support 31e of the damper 30 between the support pieces 29 at the tips of the support pieces 27,
The shaft is connected to the shaft hole of the support piece 29 and the shaft hole 31f of the shaft support, and the shaft hole 32d of the shaft support 32c of the damper 30 is connected to the shaft hole 31f of the shaft support.
A certain part is inserted into the vertical groove 2 at the end of the horizontal part 26b of the lever 26.
5f, and connect the shafts through the respective shaft holes 25g and 32d.

[0011] When a horizontal load is applied to the building 10 during an earthquake, etc., the structure of the building 10 itself causes it to sway significantly in the direction between the beams. That is, the frame consisting of the steel columns 12 and the roof truss 16 is deformed from the state shown in FIG. 6 to the state shown in FIG. 7. The upper part of the support arm 22 is fixed via the support protrusion 21 below the connection part of the lower chord member 18 to the steel column 12, and the lower part is a free end.
According to the deformation of the frame consisting of the roof truss 16 and the roof truss 16, the support arm 22 itself does not deform, and the change in the position of the support shaft 23 of the support arm 22 with respect to the lower chord member 14 is small. On the other hand, the support shaft 25 is fixed to the steel column 12 via the support protrusion 24, and the steel column 12 itself deforms in accordance with the deformation of the frame consisting of the steel column 12 and the roof truss 16. , the change in the position of the support shaft 25 with respect to the lower chord member 14 becomes large. Therefore, the lever 26 attached to the support shafts 23 and 25
moves its top horizontally. Since the shaft support 32c of the damper 30 is connected to the horizontal portion of the lever 26, the push rod 32 of the damper 30 moves in the horizontal direction, and the bulging portion 32b of the push rod 32 pushes the lead layer 33 and deforms it. Since it moves while moving, deformation of the frame consisting of the steel columns 12 and the roof truss 16 can be suppressed. Since the damper 30 uses the deformation of the lead layer 33, it effectively acts on the pulse-like maximum wave that exists at a relatively early stage of earthquake motion. In particular, it can sufficiently cope with earthquakes exceeding 25 cm/sec. Since the lever 26 has a diagonal portion 26c in its upper part and has a dogleg shape, the lower chord of the truss beam 19 in the girder direction is placed near the connecting portion of the lower chord member 14 of the roof truss 16 to the steel column 12. Even if the members 18 are connected, the lower chord member 18 does not get in the way, and the upper limit L of the crane moving on the rail R of the crane girder CG is set by the lever 26 or the damper 3.
It is not narrowed by 0.

0012

Effects of the Invention This invention provides a lever that is placed facing the side surface of a vertical member, a damper that is placed facing the side surface of the horizontal member, and the lever is placed at two positions spaced apart from each other on the side surface of the vertical member. One end and the middle of the damper are pivotally supported, one end of the damper is connected to the side of the horizontal member,
The other end of the damper is connected to the other end of the lever, and the lever and damper are located approximately within the side surfaces of the vertical member and the horizontal member when viewed from the side. It can be compactly housed within the side surface of a frame consisting of vertical members and horizontal members, and the effective space surrounded by the frame can be used effectively without being narrowed. It consists of a vertical part that extends in a substantially vertical direction, a horizontal part that extends in a substantially horizontal direction, and an oblique part that extends diagonally to connect the vertical part and the horizontal part. If you use a lever that has a connection part with the damper at the end of the section, the vertical member A damping device consisting of a lever and a damper can be accommodated without significantly narrowing the effective space surrounded by the frame consisting of the horizontal members. By using a damper with friction-type hysteresis, for example, an extruded lead damper, it is possible to effectively suppress the deformation of the structure even in the event of seismic motion exceeding 25 cm/sec. It is possible to easily obtain a frame that can sufficiently withstand the maximum pulse-like wave that initially exists.

[Brief explanation of the drawing]

[Fig. 1] Side view of the main parts of a building including a frame according to an embodiment of the present invention.

[Figure 2] End view of the one in Figure 1

[Figure 3] Side view of the main part of the building in Figure 1 with levers etc. removed

[
Figure 4: Plan view of part of the main parts of the building in Figure 1

[Figure 5] Side view of the damper with only the cylinder section cut away

[Fig. 6] A side view schematically showing the operation of the frame of the example.

[
FIG. 7: A side view schematically showing the function of the frame of the example.

[Explanation of symbols]

10　Steel frame building 12 Column steel frame 13 Top chord material 14 Lower chord material 16 Roof truss 19 Truss beam 20 Vibration damping device 21 Support protrusion 24 Support protrusion 22 Support arm 23 Support shaft 25 Support shaft 26 Leverage 26a Vertical part 26b Horizontal part 26c Diagonal part 26d Shaft hole 26e Shaft hole 26f vertical groove 26g shaft hole 27 Support piece 30 Damper 31 Cylinder 31e Axial support 32c shaft support 32 Push rod 32a Rod body 32b Bulging part 33 Lead layer 34A bearing piece 34B Bearing piece

Claims

[Claims] Claim 1: A frame constructed by combining a vertical member disposed in a vertical direction and a horizontal member disposed in a horizontal direction, wherein a lever is arranged facing the side surface of the vertical member, and a lever is disposed facing the side surface of the vertical member; A damper is placed facing the horizontal member, one end and the middle of the lever are pivotally supported at two spaced apart positions on the side surface of the vertical member, one end of the damper is connected to the side surface of the horizontal member, and the other end of the damper is A frame including a vibration damping device connected to the other end of the lever so that the lever and the damper are located approximately within the side surfaces of the vertical member and the horizontal member when viewed from the side. Claim 2: In a frame constructed by connecting a column steel frame and a beam steel frame at a joint at the end of the beam steel frame, one end of the support arm is fixed to a portion of the side surface of the column steel near the joint. , a lever is arranged facing the side surface of the column steel frame extending from the joint part of the column steel frame to a part of the column steel frame that is further away from the other end of the support arm, and one end of the lever is placed closer to the other end of the support arm. The lever is also pivoted on the side of the part of the column steel frame that is away from the joint, and the middle part of the lever is pivoted on the lower part of the support arm.
A damper is disposed facing the side surface of a portion of the beam steel frame from the joint, one end of the damper is connected to the side surface portion of the beam steel frame, and the other end of the damper is connected to the other end of the lever. A frame equipped with a distinctive vibration damping device. 3. In a frame constructed by connecting a column steel frame and a beam steel frame at a joint at the end of the beam steel frame, the upper end of the support arm is attached to a support projection on a side surface of the column steel frame near the joint. A pivot support protrusion is fixed to the side of the column steel frame below the lower end of the support arm on the side of the column steel frame, and the lower part of the lever is pivotally supported on the shaft support protrusion. , the middle part of the lever is pivotally supported at the lower part of the support arm, a support piece is fixed to the side of the part of the beam steel frame from the joint part, and a damper is attached to the side surface of the beam steel frame between the joint part and the support piece. 1. A frame equipped with a vibration damping device, characterized in that one end of the damper is connected to the support piece, and the other end of the damper is connected to the upper end of the lever. 4. The lever consists of a vertical part extending in a substantially vertical direction, a horizontal part extending in a substantially horizontal direction, and an oblique part connecting the vertical part and the horizontal part, and the middle part and the lower part of the vertical part. 4. A frame equipped with a vibration damping device according to claim 1, characterized in that the frame has a shaft support at the end thereof and a connection part with the damper at the end of the horizontal part. 5. A frame equipped with a vibration damping device according to claim 1, wherein a damper having friction type hysteresis is used as the damper.