JPH1018444A - Expansion joint part for building of base-isolated construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a flat road surface by a method wherein a horizontal connec tion plate supporting part is movably provided on a fixing side and a connection plate supporting part is provided also on the side of a building of base-isolated construction so as to be opposed to the horizontal connection plate supporting part to provide a connection plate movably between both the connection plate supporting parts. SOLUTION: A first plate 11 is supported on a receiving part 10 which is a fixing side element belonging to the surrounding ground, one of the ends of the plate 11 being fixed to a building 3 of base-isolated construction. And an expansion joint part is formed from a second plate 12 superposed on the plate 11, one of the ends of which is fixed to an end of the part 10 on the fixing side, and an expandable third plate 13 for forming a horizontal road surface nearly on a level with the second plate. Further, a hinge 17 is provided on the plate 11 at anchors 16 fixed to the building 3, and a hinge 19 is provided on the part 10 for the plate 12 at a location where anchors 18 are provided. Thus when a cleaning or maintenance work is performed, the work can be easily carried out by rotating each plate upward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation structure having different vibration periods and its surrounding ground and other adjacent structures (hereinafter referred to as a fixed portion or a fixed side with respect to the mobility of the seismic isolation structure building). )) (Dry area) is freely connected so as not to adversely affect each other mechanically.

[0002]

2. Description of the Related Art In recent years, demand for seismically isolated buildings that employ seismic isolation devices to prevent seismic energy from being directly transmitted to buildings has increased, and construction has been promoted. By the way, as for the connection of the bridge between the base-isolated structure building and the outer ground (dry area), since the vibration periods of both are different, use an expansion joint so that they do not adversely affect each other mechanically. Is of course necessary. However, at present, it is general that a building b is protruded from the building a side to the outer peripheral ground c as shown in FIG. Symbol d is a seismic isolation device. However, in the case of the bouncing frame b as described above, a step occurs at the crossing portion, so that the road surface (frame upper surface) becomes an inclined surface (slope), and when the base-isolated building a vibrates, the bouncing frame b Since b also vibrates in the same manner, there is a risk that the person riding on it may be stepped off.

Next, an expansion joint is employed in the vibration damping device described in Japanese Patent Application Laid-Open No. 63-97774. However, because of the configuration in which a large step (dent) occurs on the road surface due to the movement of the slide portion,
It is also dangerous because it may hinder the passage of people and vehicles.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention that a vibration stroke (amount of deformation) in two perpendicular directions (X, Y directions) on a horizontal plane can be absorbed up to about ± 40 cm, and the vibration state can be reduced. An object is to provide an expansion joint which always forms a substantially flat road surface.

[0005]

According to a first aspect of the present invention, there is provided an expansion joint of a seismic isolation building according to the first aspect of the present invention. Is installed so as to be movable in the horizontal Y-direction, and also on the seismic isolation structure building side, a crossing board support section is provided at substantially the same level as the crossing board support section, and the two crossing board support sections are The transfer plate is provided so as to be freely movable in a horizontal X direction orthogonal to the Y direction.

[0006] The expansion joint of the seismic isolation structure building according to the second aspect of the present invention includes:
A horizontal crossboard support portion is installed so as to be movable in the horizontal Y direction, and a crossboard support portion is provided on the fixed side at substantially the same level as the crossboard support portion so as to face each other. A transfer plate is provided between the support portions so as to be freely movable in a horizontal X direction orthogonal to the Y direction.

[0007] According to the first and second aspects of the present invention,
It is installed so that there is no displacement in the horizontal Y direction with the two bridge support parts on both sides, and with the vibration of the seismic isolated structure building, the fixed side or seismic isolated building side It is characterized by being moved unitarily in the Y direction. The expansion joint portion of the seismic isolation structure building according to the invention according to claim 4, wherein one end is fixed to the seismic isolation structure building, and the first plate is passed and supported on the fixed-side receiving portion, and one end is fixed to the fixed side. A second plate fixed and movably superimposed on the first plate in the X and Y2 directions that are horizontally orthogonal to each other, and disposed on the first plate on an extension of the second plate, It is characterized by comprising a second plate and an extendable third plate forming a horizontal road surface at substantially the same level.

[0008] The first plate described in claim 4 has a hinge at a position near a fixing portion with the seismic isolation structure building so as to be able to rotate vertically, and the second plate has a fixed side. Is characterized by having a hinge at a position near the fixing portion for enabling a vertical rotation. The first plate described in claim 4 is characterized in that a bearing material for facilitating movement is provided on a contact surface of the fixing portion with the receiving portion and a contact surface with the second plate.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIGS. 1A to 1C, an expansion joint portion of a base-isolated building according to the first aspect of the present invention is provided on a fixed side 1 shown as an outer ground. The plate support 2 is moved in the horizontal Y direction (FIG. 2A)
(See Reference). In addition, on the seismic isolation structure building 3 side, the crossover support 4 is provided at substantially the same level as the crossover support 2 so as to face each other, and between the two crossover support 2 and 4 ( The transfer plate 5 is installed in the dry area) so as to be freely movable in a horizontal X direction (see FIG. 2A) orthogonal to the Y direction.

A support frame 6 for supporting the transfer plate support 2 so as to be able to move at least about ± 40 cm in the Y direction is provided with a movable portion 6a movable along a movement guide mechanism 7 as a base. 2 is supported in a horizontal posture. As long as the above conditions are satisfied, the support frame 6
Is not limited to the illustrated link structure, and various structures and forms can be adopted. In any case, the handover support 2
Is fixed to the fixed side 1 in the X direction by the support frame 6 so as to be inseparable and integral with each other in the X direction. There is no gap or dent.
On the other hand, the bridge supporting part 4 on the seismic isolation structure 3 side is fixedly installed in a shape corresponding to the thickness thereof.

Although the illustrated moving guide mechanism 7 is provided in a posture perpendicular to the vertical wall on the fixed side 1, the present invention is not limited to this, and may be similarly implemented in a horizontal or inclined posture. Although illustration of the details of the structure of the movement guide mechanism 7 is omitted, a sliding mechanism using a sliding material such as a Teflon (registered trademark) sheet or the like, or a rail or the like is used and a wheel or a plane is formed along the rail. Well-known means such as a mechanism for moving metal or the like may be appropriately adopted and implemented.

The crossover plate 5 has a thickness of, for example, 12
A steel plate of about mm is used. The crossover plate 5 has a length (2L) that is twice as long as the clearance dimension (L) of about 40 cm in the neutral state in FIG. 1A in the left-right direction of FIG. 1. On the other hand, the length in the left-right direction of the transfer plate supporting portions 2 and 4 that support the transfer plate 5 is set to a length that allows a slide corresponding to the dimension L. Handover board 5
As a means for preventing the positional relationship between the transfer plate support portions 2 and 4 on both sides from being displaced in the horizontal Y direction, the restrained portions 5a protruding downward at both ends of the lower surface of the transfer plate 5,
On the other hand, guide grooves 8 are provided in the upper and lower surfaces of the crossover plate support portions 2 and 4 so as to be movably fitted with the restrained portions 5a and 5b so as to restrain the position so as not to cause displacement. The length L is provided.

Therefore, as shown in FIG. 1B or FIG. 1C, the transfer board 5 is moved from the normal state (neutral state) of FIG. Sliding the expansion joint works and functions. At this time, the road surface changes at most by an amount corresponding to the thickness of the bridge plate 5, and a flat surface state that does not hinder walking or the like is maintained. In addition, for the vibration in the Y direction,
Of the constrained portions 5a and 5b and the guide grooves 8 of the support members 2 and 4.
2A, the transfer plate support 2 on the fixed side 1 moves together with the support frame 6 along the movement guide mechanism 7 from the normal state (neutral state) of FIG. 2A, as shown in FIG. 2B or 2C. It is moved in the Y direction unitedly with the transfer plate 5 to function and function as an expansion joint.

Incidentally, as in the invention described in claim 2,
On the seismic isolation structure 3 side, a horizontal bridge support is installed so as to be movable in the horizontal Y direction, and on the fixed side, the bridge support is substantially at the same level as the bridge support. The invention according to claim 1, wherein the transfer plate is provided between the two transfer plate support portions so as to be freely movable in a horizontal X direction orthogonal to the Y direction. The arrangement can also be implemented as an expansion joint having a left-right reversed configuration.

Next, as shown in FIG. 3, one end of the expansion joint portion of the seismic isolation structure building according to the invention is fixed to the seismic isolation structure building 3 and belongs to the outer peripheral ground side. A first plate 11 passed and supported on a receiving part 10 constructed as a side element, and conversely, one end fixed to an end of the fixed-side receiving part 10
1 and a second road plate 12 which is arranged on the first plate 11 on an extension of the second plate 12 and forms a horizontal road surface at substantially the same level as the second plate 12. And a third plate 13 that is extendable and retractable. First and second plates 1
Reference numerals 1 and 12 are steel plates having a plate thickness of about 12 mm, and the third plate 13 is a neoprene tile as an example. Reference numeral 14 in FIG. 3 denotes a seismic isolation device.

A bearing material such as a Teflon (registered trademark) sheet for facilitating sliding is provided on the upper and lower surfaces of the first plate 11 on the contact surface with the receiving portion 10 on the fixed side and on the contact surface with the second plate 12. 15 are provided, so that they can be freely moved in the X, Y2 directions that are orthogonal to the horizontal direction. Accordingly, when the base-isolated building 3 vibrates in the Y direction from the normal (neutral) state of FIG. 4A, the first plate 11 and the third
4B and 4C, the set of plates 13 and the second plate 12
The relative displacement as shown in (1) is generated, and the operation and function of the expansion joint work. The seismic isolation building 3 is X
When the third plate 13 vibrates in the direction shown in FIG.
As shown in E, it expands and contracts to function as an expansion joint. In addition, the contraction of the third plate 13 is actually bent as shown by the dotted line in FIG.
Will be absorbed. At this time, the first plate 11 slides on the upper surface of the receiving portion 10 and the lower surface of the second plate 12. Since the third plate 13 expands and contracts and is displaced as shown in FIG.
Linking with 2 is not an essential condition. In the case of performing the connection, it is necessary to devise the connection structure with the second plate 12 so that the structure is slidable and detachable.

The first plate 11 has a hinge 17 which can be turned in the vertical direction at a position near a part fixed to the base-isolated structure building 3 and the anchor 16, and a second plate 11.
The plate 12 has a hinge 19 at a position near a portion fixed to the receiving portion 10 on the fixed side by the anchor 18, which is also capable of turning in the vertical direction. This is because, during cleaning or other maintenance work, each plate 11 or 12 is pivoted upward to raise it, thereby facilitating the work.

[0018]

[Effects of the present invention] The expansion joint according to the present invention has a relatively simple structure, does not require a special material or complicated processing, can be easily implemented at low cost, and has desired effects. This will contribute to the free connection between the seismic isolation structure building and the fixed side, which will increase in demand in the future and are likely to be constructed.

[Brief description of the drawings]

1A is a front view showing a first embodiment of an expansion joint according to the present invention in a neutral state, FIG. 1B is a front view in a contracted state, and FIG.

FIG. 2A is a plan view showing a neutral state of the expansion joint, and FIGS. 2B and 2C are plan views showing a vibration state in a Y direction.

FIG. 3 is a front view showing a second embodiment of the expansion joint according to the present invention in a neutral state.

4A is a plan view showing a neutral state of the expansion joint, FIG. 4B and FIG. 4C are vibration states in the Y direction,
D and E are plan views showing a vibration state in the X direction.

FIG. 5 is an explanatory view showing a conventional expansion joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed side 2 Bridge board support part 3 Seismic isolation structure building 4 Bridge board support section 17 Hinge 19 Hinge

Continued on the front page (72) Inventor Tsuyoshi Aritake 8-21-1, Ginza, Chuo-ku, Tokyo Inside Takenaka Corporation Tokyo Main Store (72) Inventor Noriaki Hirano 8-2-1, Ginza, Chuo-ku, Tokyo Takenaka Corporation Tokyo Head Office

Claims (6)

[Claims] 1. On a fixed side, a horizontal crossboard support is installed so as to be movable in a horizontal Y direction, and a crossboard support at the seismic isolation structure building side at substantially the same level as the crossboard support. A seismic isolation structure building, provided opposite to each other, wherein a cross board is freely installed between the two cross board support portions in a horizontal X direction orthogonal to the Y direction. Expansion joint part. 2. A horizontal crossboard support portion is installed on the seismic isolation structure building side so as to be movable in the horizontal Y direction, and on the fixed side, the horizontal crossboard support portion is at substantially the same level as the crossboard support portion. A seismic isolation structure building, provided opposite to each other, wherein a cross board is freely installed between the two cross board support portions in a horizontal X direction orthogonal to the Y direction. Expansion joint part. 3. The crosspiece described in claim 1 and 2 is installed in such a manner as not to be displaced in the horizontal Y direction with the two crosspiece support portions on both sides, and is fixed with the vibration of the seismic isolation structure building. An expansion joint section of a base-isolated building, wherein the cross-board support on the side or the base-isolated building side is moved in the Y direction together with the cross-board. 4. A first plate fixed at one end to the base-isolated structure building and passed over and supported on a fixed-side receiving portion, and a first plate fixed at one end to a fixed side and horizontally orthogonal to the first plate. A second plate movably stacked in the X and Y2 directions, and a horizontal road surface that is disposed on the first plate on an extension of the second plate and substantially at the same level as the second plate. An expansion joint section of a base-isolated structure building, characterized by being constituted by a third plate that can be extended and contracted. 5. The first plate according to claim 4, wherein the first plate has a hinge at a position near a fixing portion with the seismic isolation structure, the hinge being capable of turning in a vertical direction, and the second plate has a hinge with the fixed side. An expansion joint part of a base-isolated building, characterized by having a hinge at a position near a fixed part to enable vertical rotation. 6. The first plate according to claim 4, wherein a bearing material for facilitating movement is provided on a contact surface of the fixing portion with the receiving portion and a contact surface with the second plate. The expansion joint of the base-isolated building.