JP3711524B2 - Expansion joints for seismic isolation structures - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a space between a base-isolated structure having a different vibration cycle and an outer peripheral ground or other adjacent structure (hereinafter referred to as a fixed portion or a fixed side with respect to the mobility of the base-isolated structure building). ) Belong to the technical field of expansion joints that can be freely connected to form a flat road surface .
[0002]
[Prior art]
Recently, the demand for seismic isolation structures that use seismic isolation devices to prevent the transmission of seismic energy directly to the building has increased, and construction is underway. By the way, regarding the connection of the crossover part between the base-isolated structure building and the outer ground (dry area), since the vibration period of both is different, an expansion joint should be used so as not to adversely affect each other mechanically. Of course it is necessary. However, at present, as shown in FIG. 3 , it is general that the building frame b is jumped from the building a side to the outer peripheral ground c and connected. Symbol d is a seismic isolation device. However, in the case of the jumping frame b as described above, a step occurs at the transition part, so that the road surface (top surface of the frame) becomes an inclined surface (slope), and if the seismic isolation structure a vibrates, the springing frame b Since b vibrates in the same manner, there is a risk that a person riding on b may be crushed.
[0003]
Next, an expansion joint is employed in the vibration damping device described in Japanese Patent Laid-Open No. 63-97774. However, since it is a structure in which a large step (dent) is generated on the road surface due to the movement of the slide portion, there is a risk that the passage of people and vehicles is hindered.
[0004]
[Problems to be solved by the present invention]
The object of the present invention is to absorb vibration strokes (deformation amounts) in two directions perpendicular to the horizontal plane (X and Y directions) to about ± 40 cm, and to maintain a substantially flat road surface regardless of the vibration state. It is to provide an expansion joint part to be formed.
[0005]
[Means for Solving the Problems]
As a means for solving the problems of the prior art, the expansion joint part of the base-isolated structure building according to the invention of claim 1 is:
On the fixed side 1 , a horizontal transfer plate support 2 is installed so as to be movable in the horizontal Y direction by a support frame 6 based on a movable part 6 a that is movable along a movement guide mechanism 7. the side 3 is provided to face a horizontal pass plate supporting portion 4 phases substantially the same level as the pass support part 2, the two passes in the neutral state between the two passes support part 2,4 with the movement of the horizontal X-direction passing plate 5 made of steel plate of about 2 times the length of the clearance dimension L of the plate support portions 2 and 4 are perpendicular to the Y direction is disposed freely, the passing plate 5 is characterized in that the two transfer plate support portions 2 and 4 are slidable in the horizontal X direction, but are placed in a restrained relationship so as not to cause positional displacement in the Y direction. To do.
[0006]
The expansion joint part of the base-isolated structure building according to the invention of claim 2 is:
On the seismic isolation building side 3 , the horizontal transfer plate support 2 is installed and fixed in a horizontal Y direction by a support frame 6 based on a movable part 6 a that is movable along the movement guide mechanism 7. the side 1 is provided to face a horizontal pass plate supporting portion 4 phases substantially the same level as the pass support part 2, the two passes in the neutral state between the two passes support part 2,4 with the movement of the horizontal X-direction passing plate 5 made of steel plate of about 2 times the length of the clearance dimension L of the plate support portions 2 and 4 are perpendicular to the Y direction is disposed freely, the passing plate 5 is characterized in that the two transfer plate support portions 2 and 4 are slidable in the horizontal X direction, but are placed in a restrained relationship so as not to cause positional displacement in the Y direction. To do.
[0009]
Embodiments and Examples of the Invention
As shown in FIGS. 1A to 1C, the expansion joint portion of the base-isolated structure building according to the first aspect of the invention has a horizontal transfer plate support portion 2 on the fixed side 1 shown as the outer peripheral ground, and a horizontal Y It is installed to be movable in the direction (see FIG. 2A). In addition, the seismic isolation building 3 is also provided on the side of the seismic isolation structure building 3 so that the crossing plate support 4 is opposed to the crossing plate support 2 and between the two crossing plate supports 2 and 4 ( In the dry area, the transfer plate 5 is installed so as to freely move in the horizontal X direction (see FIG. 2A) orthogonal to the Y direction.
[0010]
The support frame 6 that supports the transfer plate support 2 so that it can move at least about ± 40 cm in the Y direction has a movable portion 6a that is movable along the movement guide mechanism 7 as a base. It is configured to support the posture. As long as the above conditions are satisfied, the structure of the support frame 6 is not limited to the illustrated link structure, and various structures and forms can be employed. In any case, since the transfer plate support portion 2 is installed in the X direction with respect to the fixed side 1 by the support frame 6, the transfer plate support portion 2 is connected to the fixed side 1 in any operation of the expansion joint portion. No large or small gaps or dents are generated between the plate support portion 2 and the plate support portion 2. On the other hand, the transfer plate support 4 on the seismic isolation structure building 3 side is fixed and installed in a shape that is carved by the thickness of the plate.
[0011]
The illustrated movement guide mechanism 7 is provided in a posture perpendicular to the vertical wall on the fixed side 1, but is not limited thereto, and is similarly implemented in a horizontal or inclined posture. Although detailed illustration of the structure of the moving guide mechanism 7 is omitted, a sliding mechanism using a sliding material such as a Teflon (registered trademark) sheet in a plane, or a rail or the like, and a wheel or a plane along the rail. It can be implemented by appropriately adopting known and known means such as a mechanism for moving metal or the like.
[0012]
As the transfer plate 5, for example, a steel plate having a thickness of about 12 mm is used. The transfer 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. On the other hand, the length in the left-right direction of the transfer plate support portions 2 and 4 that support the transfer plate 5 is set to a length that allows a slide corresponding to the clearance dimension L. The transfer plate 5 is constrained to protrude downward at both end portions of the lower surface of the transfer plate 5 as a means for preventing positional displacement in the horizontal Y direction with respect to the relationship between the transfer plate support parts 2 and 4 on both sides. On the other hand, guide grooves 8 are provided on the upper surfaces of the transfer plate support portions 2 and 4 so that the restrained portions 5a and 5b are movably fitted and restrained so as not to be displaced. The length L is provided in the left-right direction.
[0013]
Accordingly, the crossing plate 5 slides on the crossing plate support portions 2 and 4 from the normal state (neutral state) of FIG. 1A in the X direction in accordance with the vibration of the seismic isolation structure building 1 as shown in FIG. 1B or 1C. Work the function and function of the expansion joint. At this time, the road surface changes only by an amount corresponding to the thickness of the transfer plate 5, and a flat surface state that does not hinder walking or the like is maintained. Further, with respect to vibration in the Y direction, the normal state (neutral state) of FIG. 2A is caused by the restraining effect between the restrained portions 5a and 5b of the transfer plate 5 and the guide grooves 8 of the transfer plate support portions 2 and 4. 2B or 2C, the transfer plate support 2 on the fixed side 1 moves along the movement guide mechanism 7 together with the support frame 6, and is moved in the Y direction together with the transfer plate 5 to be expanded joints. It works as a function.
[0014]
In addition, as in the invention described in claim 2, a horizontal connecting plate support part is installed on the seismic isolation structure building 3 side so as to be movable in the horizontal Y direction, and the connecting plate support part is provided on the fixed side. The transfer plate support portion is provided so as to be relatively opposite to the same level, and the transfer plate is freely installed between the two transfer plate support portions in the horizontal X direction perpendicular to the Y direction. If it becomes, the arrangement | positioning of a component can also be implemented as an expansion joint part of the structure opposite to the invention of Claim 1.
[0018]
[Effects of the present invention]
The expansion joint portion according to the present invention has a relatively simple structure, does not require special materials or complicated processing, can be easily implemented at low cost, and has the desired effects. It contributes to the free connection between the seismic isolation building that will be constructed and the fixed side.
[Brief description of the drawings]
FIG. 1A is a front view showing a first embodiment of an expansion joint portion according to the present invention in a neutral state, B is a contracted state, and C is a front view in an expanded state.
2A is a plan view showing a neutral state of the expansion joint part, and B and C are plan views showing a vibration state in the Y direction. FIG.
FIG. 3 is an explanatory view showing a conventional expansion joint.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fixed side 2 Connection board support part 3 Seismic isolation structure building 4 Connection board support part

Claims (2)

  On the fixed side (1), the horizontal transfer plate support (2) is moved in the horizontal Y direction by the support frame (6) based on the movable part (6a) movable along the movement guide mechanism (7). It is movably installed, and on the side of the seismic isolation structure building (3), a horizontal transfer plate support portion (4) is provided at the same level as the transfer plate support portion (2). Between the plate support portions (2) and (4), a transfer plate made of a steel plate having a length approximately twice as long as the clearance dimension (L) of the two transfer plate support portions (2) and (4) in the neutral state. 5) is freely installed in the horizontal X direction perpendicular to the Y direction, and the transfer plate (5) is horizontal with the two transfer plate support portions (2) and (4). It is slidable in the X direction, but is installed in a restrained relationship so as not to cause a positional shift in the Y direction. That, expansion joints of the seismic isolation building.   On the seismic isolation building side (3), the horizontal transfer plate support (2) is leveled by the support frame (6) based on the movable part (6a) movable along the movement guide mechanism (7). It is installed so as to be movable in the Y direction, and on the fixed side (1), a horizontal transfer plate support portion (4) is provided at a level substantially equal to that of the transfer plate support portion (2). Between the plate support portions (2) and (4), a transfer plate made of a steel plate having a length approximately twice as long as the clearance dimension (L) of the two transfer plate support portions (2) and (4) in the neutral state. 5) is freely installed in the horizontal X direction perpendicular to the Y direction, and the transfer plate (5) is horizontal with the two transfer plate support portions (2) and (4). It is slidable in the X direction, but is installed in a restrained relationship so as not to cause a positional shift in the Y direction. That, expansion joints of the seismic isolation building.

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