JP2896936B2 - Damping beam - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam provided with a beam steel structure and having a damper attached to the beam structure to improve the vibration control performance.

[0002]

2. Description of the Related Art Conventional large span beams use steel beams.

[0003]

As the span of a building is increased, sophisticated, and diversified, functional requirements for vibration of the floor and the like are becoming stricter. In order to increase the span of a conventional steel beam and obtain a beam with good vibration properties, it is necessary to use a beam that is considerably larger than the beam required for the bearing capacity. As a result, the effective space (floor height) of the building is reduced.
The problem to be solved by the present invention is to provide a large span damping beam having a small beam structure and excellent vibration damping properties by attaching a damper to a beam steel frame.

[0004]

The invention of this application employs the following constitution as means for solving the above-mentioned problems.
Construction of the invention according to claim 1 of this application, in the beam having a beam steel having the flange in the longitudinal direction of the lower, beam steel
A guide with a guide hole is fixed to the lower surface of the flange of the beam steel along the longitudinal direction of the beam steel, a damper is fixed to the lower surface of one end of the flange of the beam steel, and a connecting member extending in the longitudinal direction of the beam steel is provided. is inserted into the guide hole, one end of the connecting member is coupled to the damper, the damping beam the other end of the connecting member is characterized by being connected to the other end of the beam steel
is there. The configuration of the invention according to claim 2 of the present application has a longitudinal
In the beam with the beam steel frame with the flange below the direction,
Plan along the longitudinal direction of the beam steel on the underside of the beam steel flange
Guiding body provided with a bore is fixed, the damper formed by interposing the viscous body between the first plate member and second plate member is inserted into the guide bore, one of said damper connecting member of the first plate of the terminal connected to one end of the beam steel, that the connecting member of the second plate of the other end of the damper is connected to the other end of the beam steel It is a characteristic damping beam.
Guiding body having the above-described guide hole, the first and second plate bodies of the connecting member and the damper, so as not to deform in a direction perpendicular to its longitudinal direction when stretched or squeezed beam flange guides Any configuration may be used as long as it can be guided so as not to be deformed in the above-described perpendicular direction.

[0005] In the best embodiment of the invention, it was
For example , a PC plate (that is, a plate made of concrete made by introducing prestress) is connected to the lower surface of the lower flange, and a beam is attached to a portion below the flange of the beam steel frame of the PC plate. forming a longitudinally extending guide hole, and so as to form a guiding member by PC plate member with the guide holes
Or , in the vicinity of the lower flange, arrange a plurality of PC steel along the longitudinal direction of the beam, the lower flange of the beam steel,
Concrete is cast around a PC steel material or the like, a PC plate is formed around a lower flange of the beam steel frame, and a guide hole extending in a longitudinal direction of the beam is formed in a portion of the PC plate below the flange. And a guide body is formed by the PC plate body having the guide holes. As the damper, for example, a damper using a viscous fluid or a viscous body, a damper using lead, a damper using contact friction, or the like is used. As the connecting member, a member having a high tensile strength and a high yield point such as a PC steel material is used. In the present invention, the PC plate joined to the lower surface of the lower flange of the beam steel frame or the PC plate formed around the flange serves as a member having a function of increasing the rigidity of the beam having the beam steel frame. Further, the PC plate not only functions to increase the rigidity of the beam, but also becomes a member constituting a floor in some cases. As a beam steel frame, for example,
Use H-beams, truss beams with upper and lower flanges, etc.

[0006]

According to the present invention, a damper is attached to a beam steel frame,
The displaceable portion of the damper and the flange portion at the end of the beam steel frame are connected by a connecting member, and expansion and contraction due to external force of the flange portion of the beam steel frame is transmitted to the damper. When an external force due to walking or the like acts, the beam steel frame is elastically deformed and the flange expands and contracts, the expansion and contraction movement is transmitted to the damper, and the external force acting on the beam can be attenuated by the damper.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment is shown in FIGS.
Portions 11a at both ends of the flange below the steel beam 11 of the section steel
Guides 13a and 12b projecting from the lower surface of the guide member 13 and a guide hole 13a provided in a lower flange portion 11b.
Are fixed at intervals in the longitudinal direction. Each guide body 13 is fixed to the flange using an appropriate fixing means such as a bolt / nut, welding, or the like. A steel rod 14 having a high tensile strength and a high yield point, such as a PC steel rod having a smaller diameter than the guide hole, is passed through the guide hole 13a of each guide body 13. A damper 15 is fixed to the support piece 12a, one end 14a of the steel rod 14 is connected to the damper 15, and the other end 14b of the steel rod 14 is connected to the beam steel support 12b.
As the damper 15, for example, as shown in FIG.
Using an ordinary vibration damping device composed of a piston 15a, a cylinder 15b, a closing body 15c, and a viscous fluid 15d filled in a space surrounded by the cylinder 15b, the end 14a of the steel rod 14 is connected to the piston 15a. Connect to In the damping beam 10 of the first embodiment, when a repeated load is applied to the beam steel frame 11 due to human walking or the like, the H-shaped steel beam frame 11 is elastically deformed, and the lower flange expands and contracts. Then, since the steel rod 14 whose end 14b is connected to the support piece 12b has the opposite end 14a connected to the piston 15a of the damper 15, the piston 15a and the cylinder 15 The positional relationship with 15b changes. However, since the space surrounded by the cylinder 15b and the closing body 15c is filled with the viscous fluid 15d, the viscous fluid 15d prevents free movement of the piston 15a and attenuates external force due to human walking or the like. As a result, the elastic deformation of the H-shaped steel beam 11 is suppressed, and the vibration damping performance of the beam steel 11 is enhanced. In this case, since the steel bar 14 is supported through the guide holes 13a of the many guides 13, the steel bar 14 may be deformed in a direction perpendicular to the longitudinal direction when the lower flange is contracted. no, it is possible to convey the stretched or squeezed flange securely to the piston 15a of the damper 15. In this embodiment, a large number of the guides 13 having the guide holes 13a are fixed to the lower surface of the flange. However, the guide is constituted by a long metal tube, and the tube is connected with or without a connecting piece. May be fixed to the lower surface of the.

A second embodiment is shown in FIGS. 4 and 5,
The beam steel frame 11 is formed of an H-shaped steel, and a plurality of bolt through holes are formed in the lower flange portion 11b at intervals in the longitudinal direction. The PC board 21 has a rectangular cross section, a longer side longer than the flange width, and a shorter length than the beam steel frame. In a concrete portion 21a of the PC plate 21, a PC steel bar 21b, a reinforcing bar 21c parallel to the PC steel bar, and ribs 21d are buried around the periphery of the 21b and 21c at intervals in the longitudinal direction, and Prestress is introduced into the PC steel bar 21b, and a plurality of bolt through holes are formed in the longitudinal direction at the intervals. Further, a guide hole 21 extending in the longitudinal direction of the beam steel frame 11 is provided at the center of the concrete portion of the PC plate 21.
e is formed. The guide hole 21e may be formed by embedding a metal tube in the concrete portion 21a, or may be formed by using an elutable core. The lower surface of the flange 11b of the beam steel frame 11 is brought into contact with the upper surface of the PC plate body 21 so that the respective bolt holes are aligned, bolts are passed through the bolt holes, and nuts are screwed into the screw portions of the bolts. The PC plate 21 is connected to the lower flange portion 11b excluding the both end portions 11a of the PC 11. And the first
Similarly to the embodiment, a steel rod 14 having a high tensile strength and a high yield point, such as a PC steel rod having a smaller diameter than the guide hole, is passed through the guide hole 21e, and the damper 15 is fixed to the support 12a. One end 14a is connected to the piston 15a of the damper 15,
The other end 14b of the steel rod 14 is connected to the beam steel beam support 12b,
The damping beam 20 is formed. The damping beam 20 is used by fixing an end of the beam steel frame 11 to a mounting portion of a beam of a steel frame or a steel reinforced concrete column. A floor FL is formed on a flange above the beam steel frame 11. As the floor FL, for example,
Use PC board, metal plate, cast-in-place reinforced concrete, etc.
In the damping beam 20 of the second embodiment, one end 14a of the steel rod 14 is connected to the damper 15 similarly to the damping beam 10 of the first embodiment.
Since the other end 14b of the steel rod 14 is connected to the support piece 12b, the free movement of the piston 15a is hindered when the lower flange expands and contracts, so that a person who acts on the beam can walk. External force due to the vibration can be attenuated, and the vibration damping performance of the beam steel frame 11 is enhanced. At the same time, beam steel 11
Since the PC plate 21 is coupled to the lower flange 11b, the rigidity of the beam steel frame 11 is increased by about 1.5 to 2.0 times, and effectively acts on vibration. By using a small steel beam as the beam steel frame 11, a large span beam having excellent vibration damping properties can be obtained.

A damping beam 30 according to a third embodiment is shown in FIG. 6, in which the beam steel frame 11 is formed of H-shaped steel, and a stud 11c having a bulging portion at the head has a lower surface of a lower flange portion 11b. A plurality of rib through holes are formed in the web above the lower flange 11b at intervals in the longitudinal direction. And the flange 1 below the beam steel frame 11
A PC plate 31 is formed around 1b. The PC board 3
1 has a rectangular cross section, its long side is larger than the flange width, and its length is shorter than the length of the beam steel frame 11. In the PC plate 31, a metal tube 31a having a circular cross section is disposed in the center below the flange of the beam steel frame 11 in parallel with the longitudinal direction of the beam, and the PC steel rods 31b are respectively provided at positions slightly apart from both ends of the lower flange. Are arranged in parallel with the longitudinal direction of the beam, and reinforcing bars 31c are respectively arranged in parallel with the longitudinal direction of the beam at portions near the corners of the rectangle, and the metal tube 31a, the PC steel bar 31b, and the reinforcing bar 31c are provided.
The ribs 31d are arranged at intervals in the longitudinal direction around the perimeter of the web, and the pre-stress is introduced into the PC steel bar 31b by introducing prestress into the steel bar 31b.
b, a mold is arranged around the stud 11c, the PC steel bar 31b, the reinforcing bar 31c, and the rib 31d, and concrete is cast into the mold to form. Then, similarly to the second embodiment shown in FIG. 5, the steel rod 14 is passed through the hole of the metal tube 31a, and the damper 15 is fixed to the support piece 12a.
4a is connected to the piston 15a of the damper 15, and the steel rod 1
4, the other end 14b is connected to the support 12b at one end of the beam steel frame,
The damping beam 30 is formed. In the vibration damping beam 30 of the third embodiment, the stud 11c is fixed to the flange 11b below the beam steel frame 11 by welding or the like, and the PC plate 31 is formed around the flange 11b. The connection with the PC board 31 is ensured. Other functions and effects of the damping beam 30 are the same as those of the second embodiment.

A damping beam 40 according to a fourth embodiment is shown in FIGS. 7 and 8, and supports 42a and 42b project from the lower surface of both ends 41a of a flange below an H-shaped steel beam 41. And
A fixing piece 43 is provided on the lower surface of the middle portion 41b of the lower flange.
The guide 43 made of a square steel pipe is fixed along the longitudinal direction of the beam steel frame 41 via a. As the damper 45, an elongated first steel plate 45A and an elongated second steel plate 4 are used.
5B, a damper 45 is inserted into the guide hole 43b of the guide body 43, and is connected to the first steel plate 45A at one end of the damper 45. The member 45A1 is connected to the support 42a of the beam steel 41, and the connection member 45B1 connected to the second steel plate 45B at the other end of the damper 45 is connected to the support 42b of the beam steel,
The damping beam 40 is formed. Since the damping beam 40 of the fourth embodiment uses a thin and long damper, the beam structure can be reduced. Other functions and effects are the same as those of the first embodiment. In the case where an elongated damper formed by interposing a viscous material between the first plate body and the second plate body is used as the damper, as in the second and third embodiments, the beam steel frame may be used. A PC plate is joined to the lower surface of the lower flange of 41, or a PC plate is formed around the flange, and extends in the longitudinal direction of the beam to a portion of the PC plate below the lower flange of the beam steel 41. A guide hole is formed (for example, the guide hole is formed by embedding a metal pipe a having a rectangular cross section in a concrete portion) to form a guide having a guide hole. An elongated damper may be inserted into the square guide hole of the guide. Again, P
The C plate has a function of increasing the rigidity of the beam, and in some cases, the PC plate may be a member constituting a part of the floor.

[0011]

The present invention is described in the claims.
By having the configuration, the following (a) to (e)
It works. (A) The vibration control beam of the invention according to claim 1 is located below the longitudinal direction.
Beam with a flanged beam steel frame
A guide hole is provided on the underside of the flange along the length of the beam steel frame.
Is fixed, and one end of the flange of the beam steel frame
A damper is fixed to the lower surface and extends in the longitudinal direction of the beam steel frame
A connecting member is inserted into the guide hole, and one end of the connecting member is
Is connected to the damper, and the other end of the connecting member is
Be coupled to the other end, to the expansion and contraction of the flange portion of the beam steel is found transmitted to the damper, and an external force acts due to walking or the like of the person to the beam, when the flange is telescopic beam steel is elastically deformed In addition, since the expansion and contraction are transmitted to the damper and the external force acting on the beam can be attenuated by the damper, a beam having excellent vibration performance can be obtained. (B) The seismic control beam of the invention according to claim 2 is located below the longitudinal direction.
Beam with a flanged beam steel frame
A guide hole is provided on the underside of the flange along the length of the beam steel frame.
E was guide member are fixed, the damper formed by interposing the viscous body between the first plate member and second plate member is inserted into the guide hole, the one end of the damper 1 connecting member of the plate body is connected to one end of the beam steel, because the connecting member of the second plate of the other end of the damper is connected to the other end of the beam steel, the (a) Has the same effect as
Not only can make the damper thin and long
And even if a damper is provided,
A large span beam having excellent vibration performance can be obtained with a small beam without narrowing the effective room space . (C) The damping beam of the invention according to claim 3 has an H-shaped cross section.
In a beam with a beam steel frame, P
The C plate is connected, and the PC plate is below the beam steel flange.
This part has a guide hole extending in the longitudinal direction of the beam.
Is the guide formed by a PC plate with internal holes?
Therefore, the rigidity of the beam is 1.5 to 2.0 due to the presence of the PC plate .
A guide member having a guide hole which is approximately twice as high and has a guide hole is easily formed. (D) The damping beam of the invention according to claim 4 has an H-shaped cross section.
In beams with beam steel, near the lower flange,
A plurality of PC steel materials etc. are arranged along the longitudinal direction of the beam.
Concrete around the lower flange of the bone, PC steel, etc.
Is installed and a PC board is placed around the lower flange of the beam steel frame.
Body is formed and the part of the PC board below the flange
A guide hole extending in the longitudinal direction of the beam is formed in
Is the guide formed by a PC plate with holes?
Therefore, the same effect as the above (c) can be obtained.
Not only that, the lower flange and PC board of H-shaped beam steel frame
And can be firmly and easily joined. (E) The vibration control beam of the invention according to claim 5 is provided below the longitudinal direction.
A beam provided with a beam steel frame having a flange, a support piece is protruded from an end of the flange below the beam steel frame, and a damper is provided.
Since the connecting member or the like connected to the displaceable portion is connected to the beam steel via the support piece , the connection between the flange below the beam steel and the connecting member becomes easy.

[Brief description of the drawings]

FIG. 1 is a front view of a damping beam according to a first embodiment.

FIG. 2 is a side view of the structure shown in FIG . 1 taken along the line aa.
Figure

FIG. 3 is a front view of the damper according to the first embodiment, which is cut longitudinally.

FIG. 4 is a sectional view of the damping beam of the second embodiment taken along the same line as FIG. 2;
Side view

FIG. 5 is a front view of a damping beam according to a second embodiment.

FIG. 6 is a sectional view of the damping beam of the third embodiment taken along the same line as FIG. 2;
Side view

FIG. 7 is a front view of a damping beam according to a fourth embodiment.

FIG. 8 is a cross-sectional view of the damping beam of the fourth embodiment taken along line bb.
Side view

[Explanation of symbols] 10,20,30,40 Damping beam 11,41 Beam steel frame 12a, 12b, 42a, 42b support piece 13,43 Guide 13a, 43b Guide hole 14 Steel rod 15,45 damper 15a piston 15b cylinder 15c closed body 15d viscous fluid 21,31 PC board 31a metal tube 45A, 45B First and second plate bodies 45C viscous body

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tetsuo Mochida 2-5-14-1 Minamisuna, Koto-ku, Tokyo Takenaka Corporation Technical Research Institute (72) Inventor Satoru Aizawa 2--14-5 Minamisuna, Koto-ku, Tokyo Takenaka (56) References JP-A-4-92040 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) E04B 1/98 F16F 15/02

Claims (5)

(57) [Claims] In a beam having a beam steel frame having a flange below in a longitudinal direction, a guide body having a guide hole along the longitudinal direction of the beam steel is fixed to a lower surface of the flange of the beam steel, and a beam of the beam steel is fixed. A damper is fixed to the lower surface of one end of the flange, a connecting member extending in the longitudinal direction of the beam steel is inserted into the guide hole, and one end of the connecting member is connected to the damper,
A damping beam, wherein the other end of the connecting member is connected to the other end of the beam steel frame. 2. A beam having a beam steel frame having a flange below in a longitudinal direction, wherein a guide body having a guide hole is fixed to a lower surface of the flange of the beam steel along the longitudinal direction of the beam steel. A damper formed by interposing a viscous material between the plate and the second plate is inserted into the guide hole, and a connecting member of the first plate at one end of the damper is formed of a steel beam. The damping beam is connected to one end, and a connecting member of a second plate body at the other end of the damper is connected to the other end of the beam steel frame. In beam 3. A cross-section with a beam Steel H-shaped, PC plate body is bonded to the lower surface of the lower flange, the P
Claim C plate body comprises a guide hole extending in the longitudinal direction of the portion below the beams of the flange of the beam steel, characterized in that the guide member is formed by a PC plate member having the guide hole 1 Or the damping beam according to 2 . 4. A beam provided with a beam steel frame having an H-shaped cross section, wherein a plurality of PC steel materials and the like are arranged in the vicinity of a lower flange along a longitudinal direction of the beam, and a lower flange of the beam steel frame is provided. P
Concrete is cast around the C steel material, etc., and a PC plate is formed around the lower flange of the beam steel frame.
3. The guide body according to claim 1, wherein a guide hole extending in a longitudinal direction of the beam is formed in a portion below the flange of the plate body, and the guide body is formed by a PC plate body having the guide hole. Damping beams. 5. A beam provided with a beam steel frame having a flange below in a longitudinal direction, a connecting member having a support projecting from an end of the flange below the beam steel frame and connected to a displaceable portion of a damper. The damping beam according to any one of claims 1 to 4 , wherein is connected to a beam steel frame via the support piece.