JP2017190585A - Lifting structure of base-isolating device mounting part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lifting structure of a base-isolating device mounting part, which can lift a column-beam joint part by supporting it in a state in which a base-isolating device is mounted.SOLUTION: A lifting structure of a base-isolating device mounting part includes a base-isolating device 10 that is provided below a column-beam joint part 20 of a building 12, and a pair of support members 38 that are arranged on both sides of the base-isolating device 10 to support a bottom surface 20A of the column-beam joint part 20 while avoiding the base-isolating device 10 and both ends of which are supported by a jack 62.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a lifting structure for a seismic isolation device mounting portion.

  In a seismic isolation building in which a seismic isolation device is installed between an upper structure and a lower structure, a method of exchanging the seismic isolation device by lifting the upper structure with a jack or the like is known.

  For example, Patent Document 1 discloses a technique for reinforcing a beam protruding from a joint portion by attaching a brace or a stiffener and jacking up the reinforced portion of the beam. Patent Document 2 discloses a technique for directly supporting a lower surface of an upper base member in which a base plate and a protruding member are embedded with a jack from directly below.

JP 2008-163636 A Japanese Patent Laid-Open No. 2015-212470

  The technique of the above-mentioned patent document 1 requires reinforcement of the beam in order to jack up, and requires a lot of structural materials and is costly. Moreover, since the technique of patent document 2 is a structure which supports an upper foundation member directly with a jack, the width | variety of the lower surface of an upper foundation member is larger than the width | variety of a seismic isolation apparatus, and there exists a space in the lower part of an upper foundation member Can only be used in some cases.

  In view of the above-described facts, an object of the present invention is to provide a lifting structure for a seismic isolation device mounting portion that can receive and lift a column beam joint in a state where the seismic isolation device is mounted.

  The lifting structure for the seismic isolation device mounting portion according to claim 1 is disposed on both sides of the seismic isolation device provided below the column beam joint of the building and on both sides of the seismic isolation device, and avoids the seismic isolation device. And a pair of support members that receive the bottom surface of the column beam joint and have both ends supported by jacks.

  According to the above configuration, the support member receives the bottom surface of the column beam joint, and supports the both ends of the support member with jacks. When jacking up, a large force does not act on the foundation beam. Therefore, it is not necessary to reinforce the foundation beam in order to jack up the column beam joint.

  In addition, since the support member receives the bottom surface of the column beam joint, avoiding the seismic isolation device, for example, when the seismic isolation device is a sliding bearing, the support member is extended to the outside of the sliding plate and the jack is placed outside the sliding plate. The sliding plate can be exchanged.

  The lifting structure for the seismic isolation device mounting portion according to claim 2 is the lifting structure for the seismic isolation device mounting portion according to claim 1, and is a connecting member that is connected to the support member and prevents the support member from falling down. Have

  According to the above configuration, by connecting the connecting member to the support member, the support member can be prevented from falling when the support member is jacked up and the column beam joint is lifted.

  The structure for lifting the seismic isolation device mounting portion according to claim 3 is the structure for lifting the seismic isolation device mounting portion according to claim 2, wherein the connecting member is located below the foundation beam of the building, A lower connecting member that is bonded to the side surface of the supporting member; and an upper connecting member that is bonded to the upper surface of the supporting member and the other is bonded to the foundation beam.

  According to the said structure, since the upper connection member and the lower connection member are joined to the upper surface and side surface of a support member, respectively, when the support member is lifted with the jack, the twist of a support member is suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, the lifting structure of the seismic isolation apparatus attachment part which can receive and lift a column beam joint part in the state in which the seismic isolation apparatus was attached can be provided.

It is a perspective view of the seismic isolation apparatus attachment part in 1st Embodiment of this invention. It is a top view of the seismic isolation apparatus attachment part in 1st Embodiment of this invention. It is a front view of the seismic isolation apparatus attachment part in 1st Embodiment of this invention. It is a side view of the seismic isolation apparatus attachment part in 1st Embodiment of this invention. (A)-(D) are process drawings at the time of lifting a seismic isolation apparatus attaching part. (A) is a top view of the seismic isolation apparatus attachment part in 2nd Embodiment of this invention, (B) is the front view.

(First embodiment)
Hereinafter, the lifting structure of the seismic isolation apparatus attachment part which concerns on 1st Embodiment of this invention is demonstrated according to FIGS.

(Seismic isolation device mounting part)
As shown in FIGS. 1 to 4, a concrete base 28 is provided on the base portion 14 of the seismic isolation pit 22 of the building 12. On the base 28, a stainless steel rectangular sliding plate 24 is fixed with bolts 30. A sliding member 26 is slidably mounted on the upper surface of the sliding plate 24.

  The sliding member 26 is composed of laminated rubber, and a sliding surface that is fluorinated is formed on the lower surface of the laminated rubber. In the present embodiment, the seismic isolation device 10 is an elastic sliding bearing including a sliding plate 24 and a sliding member 26.

  The upper flange 26A of the sliding member 26 is fixed by a bolt 34 to a base plate 32A attached to the lower end of a square steel pipe 32 for height adjustment. Moreover, the upper part of the steel pipe 32 is embed | buried under the column beam connection part 20 which consists of a square steel pipe with which concrete was filled.

  Here, since the outer shape of the steel pipe 32 is smaller than the outer shape of the column beam joint portion 20, the bottom surface 20 </ b> A of the column beam joint portion 20 is exposed along the outer peripheral portion of the steel pipe 32. The exposed bottom surface 20A serves as a receiving surface for a support member 38 to be described later.

  Further, a foundation beam 18 made of H-shaped steel is joined to the side surface of the column beam joint 20 that supports the column 16. The column 16 is made of steel frame concrete, but may be a square steel pipe or the like.

(Support member)
Next, the support member 38 constituting the lifting structure of the seismic isolation device mounting portion will be described.

  As shown in FIG. 3, the support member 38 is a pair of box-shaped beam members whose cross-sectional shapes are substantially parallelograms, an upper flat steel 38A, a lower flat steel 38B, and an upper flat steel 38A and a lower flat steel 38B. It is comprised with the slanted flat bar 38C which joins both ends of each other. The support members 38 are disposed on both sides of the seismic isolation device 10 so as to avoid the seismic isolation device 10.

  As shown in FIG. 2, both end portions of the support member 38 extend to the outside of the sliding plate 24, and lower flat steel 38 </ b> B at both end portions is supported by jacks 62 disposed on the base portion 14. In the state where the support member 38 is supported by the jack 62, the upper flat steel 38 </ b> A of the support member 38 is pressed against the exposed bottom surface 20 </ b> A of the column beam joint portion 20 via the cushioning material 60 for unevenness adjustment. It has been.

  It should be noted that both ends of the support member 38 supported by the jack 62 and the central portion of the support member 38 that supports the bottom surface 20A of the column beam joint 20 are welded to the oblique flat steel 38C of the support member 38, respectively. A plurality of reinforcing rib plates 64 are provided.

  Further, an upper connecting member 40 and a lower connecting member 42 are connected to the support member 38, respectively. The upper connecting member 40 is made of H-shaped steel, and one end of the upper connecting member 40 to which the end plate 40A is welded is connected (pin-joined) to the web of the foundation beam 18 by a bolt 44.

  A connecting plate 46 extending downward is provided on the lower surface of the other end of the upper connecting member 40. A plurality of reinforcing rib plates 52 welded to the web of the upper connecting member 40 are provided on the upper portion of the connecting plate 46.

  On the other hand, the upper flat steel 38A of the support member 38 is provided with a connecting plate 48 extending upward. Then, the connecting plate 46 of the upper connecting member 40 and the connecting plate 48 of the support member 38 are sandwiched between the gusset plates 47 and connected (pin-joined) with the bolts 50, so that the upper connecting member 40 is connected to the support member 38. It is joined.

  In addition, a connecting plate 54 extending to the seismic isolation device 10 side is welded to each of the slanted flat bars 38C of the support member 38 on the seismic isolation device 10 side. The web of the lower connecting member 42 made of H-shaped steel and the connecting plate 54 of the support member 38 are sandwiched between the gusset plates 57 and connected (pin-joined) with the bolts 56, whereby the lower connecting member 42. Is joined to the support member 38 below the foundation beam 18.

  As shown in FIG. 1, a plurality of upper connecting members 40 and lower connecting members 42 are joined at predetermined intervals in the length direction of the support member 38. As shown in FIGS. 3 and 4, a fluororesin sliding material 66 is bonded to the lower surface of the lower flat steel 38 </ b> B of the support member 38.

(How to lift)
Next, a method for exchanging the seismic isolation device 10 by lifting the column beam joint 20 will be described.

  When exchanging the seismic isolation device 10, first, as shown in FIG. 5 (A), leave nothing around the seismic isolation device 10, and as shown in FIG. 5 (B), A jack 62 is placed on the base 14 outside the sliding plate 24 of the device 10.

  Then, both end portions of the lower flat steel 38 </ b> B of the support member 38 are placed on the jacks 62, respectively. Thereafter, the support member 38 is lifted by the jack 62, and the upper flat steel 38 </ b> A of the support member 38 is pressed against the bottom surface 20 </ b> A of the column beam joint 20 via the buffer material 60 and fixed.

  Next, as shown in FIG. 5C, the upper flat steel 38 </ b> A of the support member 38 and the foundation beam 18 are connected by the upper connecting member 40. Further, the oblique flat bars 38 </ b> C of the support member 38 are connected by the lower connecting member 42.

  Thereafter, as shown in FIG. 5D, the column beam joint 20 supported by the support member 38 is lifted by further lifting the support member 38 with the jack 62. At this time, the steel pipe 32 and the sliding member 26 fixed to the column beam joint portion 20 are lifted together with the column beam joint portion 20.

  On the other hand, since the sliding plate 24 remains fixed to the base 28 of the base portion 14, a gap is formed between the sliding plate 24 and the sliding member 26. In this state, one or both of the sliding plate 24 and the sliding member 26 of the seismic isolation device 10 are exchanged. In addition, the height lifted by the jack 62 is set to a minimum height necessary for exchanging the seismic isolation device 10.

  After the seismic isolation device 10 is replaced, the column beam joint 20 is lowered by a process reverse to the above process, and the support member 38 is removed, whereby the state shown in FIG.

(Function and effect)
Next, the operation and effect of this embodiment will be described.

  In particular, when the seismic isolation device 10 is an elastic sliding bearing, the beam formation of the foundation beam 18 is small compared to other laminated rubber bearings or rolling bearings. For this reason, when receiving the foundation beam 18 with the jack 62, it is necessary to reinforce the foundation beam 18.

  However, according to the present embodiment, the bottom surface 20A of the column beam joint 20 is received by the support member 38 and both ends of the support member 38 extended to the outside of the sliding plate 24 are supported by the jacks 62. The column beam joint 20 can be lifted while avoiding the seismic device 10. Therefore, as compared with the configuration in which the foundation beam 18 is received by the jack 62, a large force does not act on the foundation beam 18 when jacked up, so that it is not necessary to reinforce the foundation beam 18.

  Further, according to the present embodiment, since the upper connecting member 40 and the lower connecting member 42 are joined to the support member 38, when the support member 38 is lifted by the jack 62, the support member 38 is prevented from falling or twisting. can do.

  Since the support member 38, the upper connecting member 40, and the lower connecting member 42 are pin-bonded, it is easier to fix compared to the case of rigid joining, and no bending moment is generated at the joint location. The falling of the member 38 can be suppressed.

  Further, the upper connecting member 40 and the lower connecting member 42 are disposed at the upper flat steel 38A and the oblique flat steel 38C of the support member 38, that is, at positions separated from each other. Therefore, the upper connecting member 40 and the lower connecting member 42 act on the upper connecting member 40 and the lower connecting member 42 as compared with the oblique flat steel 38C of the support member 38, that is, in a configuration in which the upper connecting member 40 and the lower connecting member 42 are disposed at close positions. The tensile force and compressive force to be reduced can be reduced.

  Further, the support member 38 abuts against the bottom surface 20 </ b> A of the column beam joint portion 20 via the cushioning material 60. For this reason, the buffer member 60 eliminates unevenness of the upper flat steel 38A of the support member 38 and the bottom surface 20A of the column beam joint portion 20, and suppresses concentration of stress on the support member 38 and the column beam joint portion 20. be able to.

  Further, a sliding material 66 is bonded to the lower flat steel 38B of the support member 38. For this reason, even when the supporting force of the jack 62 is lost due to an earthquake or the like during replacement of the sliding member 26 of the seismic isolation device 10, the column beam joint 20 is connected between the supporting member 38 and the sliding plate 24. Can support seismic isolation.

(Second Embodiment)
Next, the structure for lifting the seismic isolation device mounting portion according to the second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected about the structure similar to 1st Embodiment, and description is abbreviate | omitted.

  As shown in FIG. 6, the column beam joint portion 70 of the present embodiment includes a plurality of (four in the present embodiment) brackets 72 extending from the side surface. The bracket 72 has a quadrangular prism shape whose height is the same as that of the column beam joint portion 70, and is welded to the side surface of the column beam joint portion 70. The bottom surface 72 </ b> A of the bracket 72 serves as a receiving surface for the support member 78.

  The support member 78 is a pair of box-shaped beam members having a substantially rectangular cross-sectional shape, and joins the upper flat steel 78A, the lower flat steel 78B, and both ends of the upper flat steel 78A and the lower flat steel 78B. It is composed of a vertical flat steel 78C. In a state where the support member 78 is supported by the jack 62, the upper flat steel 78 </ b> A of the support member 78 is pressed against the bottom surface 72 </ b> A of the bracket 72 via the cushioning material 60 for unevenness adjustment.

  According to the present embodiment, since the column beam joint portion 70 includes the bracket 72 extending from the side surface, the support member 78 receives the bottom surface 72A of the bracket 72, thereby avoiding the seismic isolation device 10. The joint portion 70 can be lifted.

  Further, according to the present embodiment, since the cross-sectional shape of the support member 78 is substantially rectangular, the support member 78 is less likely to fall down when the support member 78 is lifted by the jack 62. For this reason, the connection member which connects support members 78 mutually becomes unnecessary.

(Other embodiments)
In addition, although an example of embodiment was demonstrated about this invention, this invention is not limited to this embodiment, Other various embodiment is possible within the scope of the present invention.

  For example, in the first and second embodiments, the seismic isolation device 10 is an elastic sliding bearing, but any seismic isolation device such as a laminated rubber bearing or a rolling bearing may be used. In addition, the cross-sectional shape of the support members 38 and 78 is not limited to a parallelogram or a rectangle, and can be an H-shaped steel or the like as long as it can support the column beam joints 20 and 70 while avoiding the seismic isolation device 10. Other cross-sectional shapes may be used.

  In the first embodiment, the support member 38 is connected by the upper connection member 40 and the lower connection member 42 that are pin-bonded. However, even if the support member 38 is connected by one connection member that is rigidly connected, Good.

  Further, in the above embodiment, the sliding material 66 made of fluororesin is bonded to the lower surfaces of the lower flat steels 38B and 78B of the supporting members 38 and 78, but the sliding material 66 is not provided on the supporting members 38 and 78. Also good. Further, the material of the sliding member 66 and the fixing method to the support members 38 and 78 are not limited to the above embodiment.

DESCRIPTION OF SYMBOLS 10 Base isolation device 12 Building 16 Foundation beam 20, 70 Column beam joint part 20A, 72A Bottom surface 38, 78 Support member 40 Upper connection member (connection member)
42 Lower connection member (connection member)
62 Jack

Claims (3)

A seismic isolation device provided below the column beam joint of the building;
A pair of support members disposed on both sides of the seismic isolation device, receiving the bottom surface of the column beam joint portion avoiding the seismic isolation device, and having both ends supported by jacks,
A structure for lifting the seismic isolation device mounting portion.   The structure for lifting a seismic isolation device mounting portion according to claim 1, further comprising a connecting member that is connected to the supporting member and suppresses the falling of the supporting member. The connecting member is
A lower connecting member located below the foundation beam of the building and joined to a side surface of the support member;
An upper connecting member in which one is bonded to the upper surface of the support member and the other is bonded to the foundation beam;
The structure for lifting the seismic isolation device mounting portion according to claim 2, comprising:

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