JP4048878B2 - Manufacturing method of upper and lower armor of seismic isolation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a lower structure of a building such as a building, an elevated highway, a bridge or a detached house, for example, interposed between a foundation and an upper structure, and an upper part of the vibration of the foundation due to an earthquake, traffic vibration, etc. The present invention relates to a method for manufacturing an upper arm and a lower arm used in a seismic isolation device that reduces the transmission to the structure and prevents the collapse of the upper structure.
[0002]
[Problems to be solved by the invention]
As the seismic isolation device, a lower rod having a concave sliding surface upward is attached to the lower structure, and an upper rod having a concave sliding surface is attached to the upper structure, respectively. There is known one in which a sliding body is slidably brought into contact with each sliding surface between a collar and an upper collar.
[0003]
And most of the lower and upper rods in this type of seismic isolation device are manufactured by integrally casting and then cutting at necessary places.
[0004]
By the way, in the case of the lower casting and upper casting that are integrally cast products, the weight thereof becomes large, and it takes a lot of time and labor in its transportation, installation, etc. Since the manufacturing process requires a cutting process, this also requires a lot of time and labor in combination with the above, resulting in an increase in cost.
[0005]
On the other hand, as described in Japanese Patent Application Laid-Open No. 2000-27935, a thin metal plate and a thick plate having a curved surface are overlapped, and a grout material is poured into a gap between the thin metal plate and the thick plate to solidify the grout. Techniques have been proposed for manufacturing the upper arm by forming a layer, and according to such technology, the upper arm can be reduced in weight and can be easily transported and installed. A time-consuming cutting process can be saved.
[0006]
By the way, in the technique described in the publication, in order to form the upper ridge by pouring the grout material into the space between the thin metal plate and the thick plate in a state where the thin metal plate and the thick plate are installed horizontally, there is no shrinkage. If the grout material is not used, a gap may occur on the lower surface of the thick plate after the grout material is solidified. If the load on the upper structure is supported by the upper arm with this gap, the curved surface of the thin metal plate cannot be maintained as desired. Therefore, it is difficult to obtain the intended support function and seismic isolation function. According to the technology described in the publication, such a problem is not limited to the upper eyelid but can occur similarly to the lower eyelid.
[0007]
The present invention has been made in view of the above-mentioned points. The object of the present invention is to eliminate a time-consuming and labor-consuming cutting process, reduce costs, and eliminate the need for a filler. Provided is a method for manufacturing upper and lower heels of a seismic isolation device that does not cause an inconvenient gap after the filler is solidified without exhibiting a support function and a seismic isolation function without using a shrinkable grout material. There is.
[0008]
[Means for Solving the Problems]
It is interposed between a lower rod having a lower load receiving surface having an arc-shaped concave section upward, an upper rod having an upper load receiving surface having an arc-shaped concave portion facing downward, and the lower rod and the upper rod. And at least one of the upper collar and the lower collar has a concave plate portion having an arc cross section and an annular side plate portion integrated with the concave plate portion, and a plate-like body. A plate-like member made of a flat plate-like lid member fixed to a side plate portion of the plate-like member, and a filling body filled in a space between the plate-like member and the lid member. The manufacturing method according to the first aspect of the present invention for at least one of the upper and lower eyelids for a seismic isolation device that movably supports the upper eyelid via an intervening body, Combination of a plate-like member having an opening for supplying a filler for the side plate on the side plate and a flat lid member fixed to the side plate of the plate-like member Prepare a fitting body, supply a filler from the opening to the space between the dish-shaped member and the lid member of the combined body, fill the space with the filler, and at least during solidification of the filler in the space The combined body is erected so that the opening of the side plate portion is located above.
[0009]
According to the manufacturing method of the first aspect, during the solidification of the filler in the space, in order to make the combination stand upright so that the opening of the side plate portion is located above, the influence of the shrinkage of the filler during the solidification Is limited to the vicinity of the side plate portion on the opening side, and the filler filled in the space between the dish-shaped member and the lid member is in close contact with the dish-shaped member and the lid member to be solidified. As a result, there is substantially no gap between the plate-like member that receives the load and the lid member, and therefore there is no need to use a non-shrinkable grout material as the filler. Therefore, the support function and the seismic isolation function can be exhibited as desired, and the cutting process can be omitted, so that the cost can be reduced.
[0010]
In the manufacturing method of the present invention, as in the manufacturing method of the second aspect, even if the supply of the filler from the opening to the space is started after the combination is upright, the manufacturing method of the third aspect As described above, the combination may be erected after filling the filler into the space, and the combination is kept upright until the solidification of the filler is completed as in the fourth aspect of the manufacturing method. Also good.
[0011]
According to the manufacturing method of the second aspect, in order to erect the combined body before the start of filling, the lightweight combined body not filled with the filler is erected. As a result, the operation is facilitated, which is preferable.
[0012]
What is manufactured by the manufacturing method of the present invention may be upper iron as in the manufacturing method of the fifth aspect, or may be lower iron as in the manufacturing method of the sixth aspect. .
[0013]
In the present invention, the filler is preferably supplied until the opening is filled with the filler as in the manufacturing method of the seventh aspect, but instead, as in the manufacturing method of the eighth aspect. The filling material is supplied to the space through the hollow portion and the opening of the surrounding body using the dish-like member having the hollow surrounding body on the side plate portion, and is filled until the hollow portion of the surrounding body is filled with the filling material. A material may be supplied.
[0014]
According to the manufacturing method of the eighth aspect, even when a shrinkable grout material is used as the filler, the number of cavities that can be generated in the vicinity of the side plate portion on the opening side can be reduced as much as possible, and the influence of the shrinkage of the filler can be reduced. It can be as small as possible.
[0015]
In the manufacturing method of the eighth aspect, as in the manufacturing method of the ninth aspect of the present invention, it is determined based on the shrinkage amount at the time of solidification of the filler filling the space between the dish-like member and the lid member. It is preferable to fill the hollow portion of the enclosure with a sufficient amount of the filler, and by adopting such a method, it is possible to prevent a cavity from being generated in the vicinity of the side plate portion on the opening side.
[0016]
A non-shrinkable grout material may be used as the filler, but a shrinkable grout material may be used as in the manufacturing method of the tenth aspect of the present invention.
[0017]
In the manufacturing method of the present invention, as in the manufacturing method of the eleventh aspect, after the filler is solidified, the upright state is released.
[0018]
In the present invention, the intervening body has the same curvature as that of the lower load receiving surface of the lower rod as in the manufacturing method of the twelfth aspect, and is slidably in contact with the lower load receiving surface. A sliding body having a sliding lower surface and a curvature having the same curvature as that of the upper load receiving surface of the upper collar and slidably contacting the upper load receiving surface may be used. The invention is not limited to this, and the inclusion may be a roller or a sphere. If the intervening body is a sliding body, the seismic isolation device is a sliding seismic isolation device using sliding, and if the inclusion is a roller or a ball, the seismic isolation device is a rolling seismic isolation device.
[0019]
The dish-like member may be integrally formed by spatula drawing or press molding, may be integrally formed from a weather-resistant steel plate, and further, a stainless steel plate or surface It may be made of a rigid metal plate, preferably a steel plate, plated with copper or zinc. As a preferable example of the thickness of the plate-like member constituting the dish-like member, about 1.8 mm to 3.2 mm can be mentioned, but the present invention is not limited to this, and press forming or spatula drawing forming or the like is possible. Others are possible as long as they are possible and can achieve the above object.
[0020]
As the lid member, a steel plate having a thickness and strength that does not cause deformation or the like when supporting the load of the upper structure in addition to being able to maintain the upright state of the combined body, preferably a weathering steel plate, etc. What is necessary.
[0021]
Next, the present invention and its embodiments will be described in more detail with reference to the drawings. The present invention is not limited to these embodiments.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
First, an example of the seismic isolation device 3 using the lower rod 1 and the upper rod 2 manufactured in the embodiment of the manufacturing method of the present invention will be described. 1 and 2, the seismic isolation device 3 of the present example has a lower sliding surface 4 as a lower load receiving surface having a concave section in an arc shape upward, and serves as a foundation as a substructure of a building. A lower rod 1 fixed to 5, an upper sliding surface 6 as an upper load receiving surface having an arc-shaped concave section downward, and an upper rod 2 fixed to an upper structure 7 of the building, The lower sliding surface 4 has a curvature (curvature radius R) that is the same as that of the lower sliding surface 4 and includes a lower sliding surface 8 that is slidably in contact with the lower sliding surface 4. It has a sliding upper surface 9 that has the same curvature (curvature radius R) as the curvature (curvature radius R) of the upper sliding surface 6 of the flange 2 and is slidably in contact with the upper sliding surface 6. And the upper body 2 are provided with a sliding body 10 which is an interposed body.
[0023]
The lower arm 1 is manufactured by integrally forming a stainless steel plate, which is a weather-resistant steel plate, by press molding, and is formed integrally with the disk-shaped concave plate portion 13 and the peripheral edge of the concave plate portion 13. In this example, the plate-like member 15 having the annular side plate portion 14 that is integral with the concave plate portion 13 and the end surface of the side plate portion 14 of the plate-like member 15 made of a plate-like member are fixed by welding or the like. A flat and square lid member 16 and a filling body 17 filled and solidified in a space between the dish-like member 15 and the lid member 16. A side sliding surface 4 is provided.
[0024]
The lower rod 1 is fixed to the foundation 5 with a cover member 16 by a plurality of anchor bolts 19 planted on the foundation 5.
[0025]
The filling body 17 is made of a grout material as a filling material that is filled and solidified in a space between the inner surface 23 of each of the concave plate portion 13 and the side plate portion 14 and one surface 24 of the lid member 16.
[0026]
Similar to the lower rod 1, the upper rod 2 is manufactured by integrally forming a stainless steel plate, which is a weather-resistant steel plate, by press forming, and has a circular arc-shaped cross-section with a disk-shaped concave plate portion 31 and a concave plate portion. An annular plate integrally formed with the peripheral edge of 31 and integrated with the concave plate portion 31, in this example, a dish-like member 33 having a cylindrical side plate portion 32, and a side plate portion 32 of the dish-like member 33 made of a plate-like body. A flat plate-shaped lid member 34 fixed to the end surface of the plate by welding or the like, and a filling body 35 filled in the space between the plate-like member 33 and the lid member 34 and solidified. The upper sliding surface 6 is provided on the concave plate portion 31.
[0027]
The upper collar 2 is fixed to the upper structure 7 with a plurality of bolts 36 with a lid member 34.
[0028]
The filler 35 is made of a grout material as a filler that is filled and solidified in a space between the inner surface 37 of each of the concave plate portion 31 and the side plate portion 32 and one surface 38 of the lid member 34.
[0029]
The sliding body 10 is formed of a rigid body with such a height that an appropriate gap is generated between the lower rod 1 and the upper rod 2, and the diameter d thereof is defined by the lower sliding surface 4 and the upper sliding surface 6. Is sufficiently smaller than the diameter D.
[0030]
In this example, each of the lower sliding surface 4 and the upper sliding surface 6, the sliding lower surface 8 and the sliding upper surface 9 is formed of a part of a spherical surface, and the respective radii of curvature are the same.
[0031]
In the seismic isolation device 3 described above, the upper rod 2 is supported by the lower rod 1 via the sliding member 10 so as to be movable in the horizontal direction H, so that the sliding member 10 is always in the lower sliding surface 4. The upper structure 7 is supported on the foundation 5 by receiving the vertical load of the upper structure 7 and being positioned substantially at the center of the upper sliding surface 6. Even if a slight horizontal force is applied to the upper structure 7 due to wind or the like or a slight horizontal force is applied to the foundation 5 due to a small earthquake or the like, the lower sliding surface 4 and the upper sliding surface 6 are applied. The upper structure 7 does not sway relatively in the horizontal direction H with respect to the foundation 5 due to frictional resistance caused by surface contact between the sliding lower surface 8 and the sliding upper surface 9.
[0032]
When a large horizontal force is applied to the foundation 5 due to seismic motion or the like, sliding of the sliding lower surface 8 and the sliding upper surface 9 occurs with respect to the lower sliding surface 4 and the upper sliding surface 6, as shown in FIG. The upper structure 7 is vibrated relative to the base 5 in the horizontal direction H while the sliding body 10 is swung. In such vibration, the sliding body 10 tends to return to the position shown in FIG. 1, and the vibration energy of the upper structure 7 based on the movement of the foundation 5 in the horizontal direction H is lower than the lower sliding surface 4. And it is absorbed and damped by the friction between each of the upper sliding surface 6 and each of the sliding lower surface 8 and the sliding upper surface 9. Therefore, even if a large horizontal force such as an earthquake is applied to the foundation 5, it is possible to prevent a situation in which the upper structure 7 is collapsed.
[0033]
Next, a method of manufacturing the lower arm 1 used in the seismic isolation device 3 will be described. First, as shown in FIG. 4, an opening 52 for supplying a filler for the filler 17, for example, a shrinkable grout material 51, is provided. Prepare a combination body 53 of the plate-like member 15 provided on the side plate portion 14 and the flat lid member 16 fixed to the end face of the side plate portion 14 of the plate-like member 15 by welding or the like. Similarly, as shown in FIG. 4, after the upright 52 is located so that the opening 52 of the side plate portion 14 is positioned upward, a hose 54 for supplying the grout material 51 is connected to the opening 52 formed of a circular through hole, The supply of the grout material 51 to the space 55 between the dish-like member 15 and the lid member 16 of the combined body 53 is started from 52, the grout material 51 is supplied to the space 55 from the opening 52, and the grout material 51 is supplied to the space 55. Are sequentially filled and the opening 52 is filled. Supplying grout 51 to be filled with grout 51. After the opening 52 is filled with the grout material 51 in addition to the space 55, the supply of the grout material 51 is stopped, and then the grout material 51 is solidified while maintaining the upright state of the combined body 53, and then the grout material During the solidification of 51, the combined body 53 is erected so that the opening 52 of the side plate portion 14 is positioned above, and the combined body 53 is maintained up to the completion of the solidification of the grout material 51. The combination body 53 is released from the upright state, and the lower shell 1 in which the filler 17 composed of the grout material 51 thus solidified is formed in the space 55 is manufactured. After the manufacturing, the lower shell 1 is mounted on the foundation 5. It is used for the seismic isolation device 3.
[0034]
In the lower punch 1 manufactured as described above, a cavity 56 (see FIG. 1) due to contraction when the grout material 51 is solidified can be generated in the vicinity of the side plate portion 14 on the opening 52 side. Is sufficiently away from the central portion of the lower sliding surface 4 and therefore does not substantially affect the support function and seismic isolation function of the seismic isolation device 3.
[0035]
The upper bowl 2 can also be produced in the same manner as the lower bowl 1.
[0036]
In the above manufacturing method, during the solidification of the grout material 51, the combined body 53 is erected so that the opening 52 of the side plate portion 14 is positioned upward, so that the influence of the shrinkage of the grout material 51 during the solidification is on the opening 52 side. The grout material 51 filled in the space 55 between the dish-like member 15 and the lid member 16 is in close contact with the dish-like member 15 and the lid member 16. As a result, the gap between the dish-like member 15 and the lid member 16 that receives the load is substantially not generated, and therefore, the non-shrinkable grout material is not used as the grout material 51. Inconvenient gaps are not generated after the grout material 51 is solidified, so that the support function and the seismic isolation function can be exhibited as desired, and the cutting process can be omitted, so that the cost can be reduced. Before filling To erect only combined body 53, a result of grout 51 is thereby upright combination body 53 of lightweight unfilled, thereby facilitating the work.
[0037]
In the above manufacturing method, the hose 54 is connected directly to the opening 52 and the space 55 is filled with the grout material 51 via the opening 52. Instead, as shown in FIG. The lower casing 1 may be manufactured using the dish-shaped member 15 having the side plate portion 14 with the pipe 61 serving as an enclosed hollow enclosure. That is, as shown in FIG. 5, the tube 61 is fixed to the side plate portion 14 by welding or the like, preferably temporarily fixed, and the plate-like lid member 16 fixed to the side plate portion 14 of the plate-like member 15. And the combination body 53 is erected so that the opening 52 of the side plate portion 14 is located above, and then the hose 54 for supplying the grout material 51 is connected to the pipe 61 to obtain the combination body. While maintaining the upright state of 53, the grout material 51 is supplied to the space 55 through the hollow portion 62 and the opening 52 of the tube 61, and the hollow portion 62 of the tube 61 is formed by the grout material 51 as shown in FIG. The grout material 51 is supplied until it is filled, and thereafter, the lower iron 1 is manufactured in the same manner as described above. In the case of such a manufacturing method, when the amount of grout material 51 determined based on the amount of shrinkage at the time of solidification of the grout material 51 filling the space 55 is filled in the hollow portion 62 of the pipe 61, the cavity 56 (see FIG. 1). ) Can be eliminated. Then, after the grout material 51 is solidified, the temporarily fastened tube 61 may be removed from the side plate portion 14 as shown in FIG. The upper bowl 2 can be manufactured in the same manner as the lower bowl 1.
[0038]
In any of the manufacturing methods described above, after the grout material 51 is filled into the space 55 and before the grout material 51 is solidified, preferably immediately after the grout material 51 is filled into the space 55, the combination body 53 is erected. Alternatively, after the grout material 51 is solidified, the opening 52 may be closed with a sealing member as necessary.
[0039]
【The invention's effect】
According to the present invention, it is possible to save a lot of time and a labor-intensive cutting process, and to reduce the cost. In addition, a support function and a seismic isolation function can be achieved without using a non-shrinkable grout material as a filler. Thus, it is possible to provide a method for manufacturing the upper and lower armpits of the seismic isolation device that does not cause an inconvenient gap after the filling material is solidified.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a preferred example of an embodiment of a seismic isolation device using an upper arm and a lower arm manufactured by the manufacturing method of the present invention.
FIG. 2 is a cross-sectional view taken along line II-II shown in FIG.
FIG. 3 is an operation explanatory diagram of the example shown in FIG. 1;
4 is an explanatory view of an example of a manufacturing method of the example of the upper eyelid and the lower eyelid shown in FIG. 1. FIG.
FIG. 5 is an explanatory diagram of another example of the manufacturing method of the example of the upper and lower eyelids shown in FIG.
6 is an explanatory diagram of the example of FIG.
FIG. 7 is an explanatory diagram of the example of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lower arm 2 Upper arm 3 Seismic isolation device 4 Lower side sliding surface 5 Base 6 Upper side sliding surface 7 Upper structure 10 Sliding body 13 Concave plate part 14 Side plate part 15 Dish-shaped member 16 Lid member 17 Packing body

Claims (12)

It is interposed between a lower rod having a lower load receiving surface having an arc-shaped concave section upward, an upper rod having an upper load receiving surface having an arc-shaped concave portion facing downward, and the lower rod and the upper rod. And at least one of the upper collar and the lower collar has a concave plate portion having an arc-shaped cross section and an annular side plate portion integrated with the concave plate portion, and a plate-like body. A plate-shaped member made of a flat plate-shaped lid member fixed to a side plate portion of the plate-shaped member, and a filling body filled in a space between the plate-shaped member and the lid member. A method of manufacturing at least one of the upper and lower heels for a seismic isolation device that movably supports the upper heel via an intervening body, and supplying a filler for the stuffing body A combination of a plate-like member having an opening in the side plate portion and a flat lid member fixed to the side plate portion of the plate-like member is prepared. The filler is supplied to the space between the dish-shaped member and the lid member of the combined body from the opening to fill the space with the filler, and the combined body is opened at the side plate portion at least during solidification of the filler in the space. A method of manufacturing at least one of an upper eyelid and a lower eyelid, wherein the upper eyelid and the lower eyelid are made to stand upright. The manufacturing method according to claim 1, wherein after the combination body is erected, the supply of the filler from the opening to the space is started. The manufacturing method according to claim 1, wherein the combination is erected after filling the space with the filler. The manufacturing method as described in any one of Claim 1 to 3 which maintains an upright state of a combined body until completion of solidification of a filler. The manufacturing method according to any one of claims 1 to 4, wherein at least one of the upper eyelid and the lower eyelid is an upper eyelid. The manufacturing method according to any one of claims 1 to 4, wherein at least one of the upper eyelid and the lower eyelid is a lower eyelid. The manufacturing method according to claim 1, wherein the filler is supplied until the opening is filled with the filler. It is a manufacturing method as described in any one of Claim 1 to 7 using the dish-shaped member which has the hollow enclosure in the side-plate part, Comprising: A filler is supplied to space through the hollow part and opening of an enclosure. And a manufacturing method of supplying the filler until the hollow portion of the enclosure is filled with the filler. The manufacturing method according to claim 8, wherein the hollow portion of the enclosure is filled with an amount of filler determined based on a shrinkage amount when the filler filling the space between the dish-shaped member and the lid member is solidified. The manufacturing method as described in any one of Claim 1 to 9 which uses a shrinkable grout material as a filler. The manufacturing method according to any one of claims 1 to 10, wherein the upright state is released after the filler is solidified. The intervening body has the same curvature as that of the lower load receiving surface of the lower rod, and has a sliding lower surface slidably contacting the lower load receiving surface, and the curvature of the upper load receiving surface of the upper rod. The manufacturing method according to any one of claims 1 to 11, which is a sliding body having a sliding upper surface having the same curvature and slidably contacting the upper load receiving surface.

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