JP2001027282A - Base isolating member position adjusting method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolating member position adjusting method and device capable of correcting the hole dislocation of a fixing bolt of a base isolating member rapidly and economically by a simple method. SOLUTION: In this base isolating member position adjusting method in replacement work of a base isolating member interposed between a lower building skeleton 30 and an upper building skeleton 31, an upper end 11b of the base isolating member is first fixed to the upper building skeleton 31, and then a lower end 11a of the base isolating member is fixed to the lower building skeleton 30 after correcting its dislocation from the lower building skeleton 30. Accordingly, even if dislocation is generated between a bolt hole 13 of the base isolating member and a bolt hole 13a, hole dislocation correcting work needs to be done only between the lower end 11a of the base isolating member and the lower building skeleton 30 by fitting the upper end 11b of the base isolating member first to the upper building skeleton 31. Adjusting work can therefore be performed sufficiently even with small adjusting equipment and material besides improving workability, so that this method is applicable to work in a narrow place such as a base isolation pit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a displacement of a seismic isolation member with respect to a lower building body, that is, a displacement of a fixing bolt hole when replacing an isolator or a damper which is a seismic isolation member used for a seismic isolation building. The present invention relates to a method and an apparatus for adjusting the position of a seismic isolation member for adjusting and correcting the position.

[0002]

2. Description of the Related Art In a seismic isolation building, an isolator or a damper as a seismic isolation member is constructed by being interposed between a lower building frame and an upper building frame. Conventionally, the position of the lower building and the upper building in seismic isolation buildings has shifted after a large earthquake, etc., and the isolators and dampers may have been severely damaged. The isolators and dampers have been replaced with new ones to make sure.

[0003]

However, when the isolators and dampers interposed between the lower building frame and the upper building frame are replaced, the bolt holes in the base plate at the lower end of the main body of the seismic isolation member and the lower building are required. It is necessary to match the bolt holes of the lower anchorage plate in the frame with the fixing bolts, but a slight displacement between the lower building frame and the upper building frame caused by the earthquake, or a new seismic isolation member If there is a deviation between the two bolt holes due to a manufacturing error or the like, a relatively large jack device is used to relatively move the lower building frame and the upper building frame to match these bolt holes. Large work such as centering the isolator and damper, which are seismic isolation members, using a conventional pulling jig such as a lever block. It takes a great deal of effort, it was very inefficient and uneconomical.

In view of the above, the present invention has been made to solve the problem of the conventional method of adjusting the position of the seismic isolation member, and to quickly and economically correct the displacement of the fixing bolt hole of the seismic isolation member by a simple method. It is an object of the present invention to provide a method and an apparatus for adjusting the position of a seismic isolation member that can be performed.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a method of adjusting the position of a seismic isolation member in a work of replacing a seismic isolation member interposed between a lower building frame and an upper building frame.
After the upper end of the seismic isolation member is fixed to the upper building frame, the lower end of the seismic isolation member is fixed to the lower building frame after correcting the misalignment with the lower building frame. is there. Also, the present invention provides a position adjusting device for a seismic isolation member used to correct a displacement of a lower end portion of a seismic isolation member with respect to a lower building frame. A plurality of operable jacks are installed. Further, the invention is characterized in that the plurality of jacks are oriented in two or more directions. Further, the present invention is characterized in that a support plate is interposed between the ram tip of the jack and the lower end of the seismic isolation member. Further, the present invention is characterized in that a spacer is provided inside the frame on the side opposite to the jack, and these are used as means for solving the problem.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show a first embodiment of a method and an apparatus for adjusting the position of a seismic isolation member according to the present invention.
FIG. 1A is a cross-sectional view during the position adjustment or correction of the seismic isolation member (viewed from an arrow A in FIG. 1B), FIG. 1B is a view viewed from an arrow B in FIG. 1A, and FIG. ) Is a plan view of the seismic isolation member (in the case of a steel bar or a damper), FIG. 2B is a view taken in the direction of an arrow D in FIG. 2A, and FIG. It is. FIG.
As shown in FIG. 1A, in the present invention, a seismic isolation member 20 (lower base plate 11) is interposed between a lower building frame 30 and an upper building frame 31 made of concrete or the like.
a, upper base plate 11b and steel rod damper 21
In the method for adjusting the position of the seismic isolation member 20 in the replacement work, the upper end portion (11b) of the seismic isolation member 20 is shown.
Is fixed to the upper fixing plate 12b of the upper building frame 31, and the lower end portion (11a) of the seismic isolation member 20 is corrected for misalignment with the lower building frame 30, and then the lower building frame 3 is fixed.
And a lower fixing plate 12a for fixing a lower end (11a) of the seismic isolation member 20 with respect to the lower building frame 30.
As the position adjusting device, there is used a device in which a plurality of jacks 3 operating inward are installed on the inner side surface of a closed flat frame 1.

As the closed planar frame 1, a frame having an O-shape or the like may be employed in addition to a mouth-shaped frame as shown in FIG. 1 (B). Also, the seismic isolation member 20
In addition to the steel rod damper shown in the drawing, a lead damper or an isolator (see FIG. 5A) formed by alternately stacking rubber and a metal plate is applicable. As shown in FIG. 2, the steel rod damper 21 is provided between a pair of opposing lower base plates 11a and upper base plates 11b, each of which has four spirals arranged at four corners, and has a mounting bolt 2
4 fixed. When reattaching a new steel bar damper 21 to the skeleton of an existing building, use the steel bar damper 2
Upper base plate 11 fixed to the upper and lower ends of 1
b and the lower base plate 11a are integrally replaced as the seismic isolation member 20.

Hereinafter, a method for adjusting the position of the seismic isolation member in the present embodiment will be described. An upper fixing plate 12b is attached to a lower portion of the upper building frame 31 by studs 16 and anchor bolts 17, and the lower building frame 30
The lower fixing plate 12a is attached to the upper part of the upper part by studs 16 and anchor bolts 17. The outer dimension height h ′ of the upper and lower base plates 11a and 11b of the steel rod damper 21 is slightly lower than the inner dimension height h of the upper and lower fixing plates 12a and 12b. In order to replace the steel bar damper 21 which is such a seismic isolation member with a new one,
Long nut 17a in upper and lower building frames 30 and 31
The upper and lower base plates 11b and 11a of the old steel bar damper 21 are removed from the upper fixing plate 12b of the upper building frame 31 and the lower fixing plate 1 of the lower building frame 30, respectively, by removing the fixing bolts 15a (see FIG. 3) and 15b.
2a, a new steel rod damper 21 is inserted into a predetermined position, and then the upper base plate 11b at the upper end of the steel rod damper 21 is first attached to the upper building frame 31.
Is fixed to the upper fixing plate 12b with fixing bolts 15b.

At this time, if the bolt holes 13 in the lower base plate 11a at the lower end of the steel bar damper 21 are misaligned with the bolt holes 13a in the lower fixing plate 12a of the lower building frame 30, the fixing bolt 15a cannot be inserted. Therefore, the position of the lower base plate 11a in the steel rod damper 21 is adjusted and corrected, and the lower fixing plate 1 is adjusted.
It is necessary to align with the bolt hole of 2a. As shown in FIG. 1 (B), a flat frame 1 closed in the shape of a mouth.
To the lower base plate 11 of the steel rod damper 21.
a and the lower fixing plate 12 a in the lower building frame 30. Frame 1 is strong enough,
For correction, the lower base plate 11a and the lower fixing plate 12
It is configured to have a dimension capable of pressing a. In addition,
The flat frame 1 closed in the shape of a mouth is divided at a pair of corners in order to easily surround the lower base plate 11a and the lower fixing plate 12a, and the L-shaped spelling plates 14, 14 are formed. Are fastened by bolts 14a, 14a to be integrated.

One of the frames 1 (in the example shown in FIG.
The left side and the upper side of (B) support the lower fixing plate 12a in the lower building frame 30, and the other of the frame 1 (FIG. 1 (B)).
(The right side and the lower side) support the lower base plate 11a of the steel bar damper 21 with the jack 3. In this embodiment, a plurality of jacks 3 are installed on the inner surface of the frame 1 by the jack receiver 2 so as to operate inward, and the ram 3 a at the tip thereof is connected to the lower base plate 11.
a. Since the direction in which the bolt holes 13 in the lower base plate 11a and the bolt holes 13a in the lower fixing plate 12a are displaced is arbitrary, the plurality of jacks 3, 3,.
It is installed on the right side and the lower side in. The larger the displacement dimension of the bolt hole, the greater the resilience of the steel rod damper 21. In this case, increase the number of jacks or replace them with jacks of higher capacity.

In this manner, in a state where the lower fixing plate 12a of the lower building frame 30 is supported by one of the frames 1, the lower portion of the steel rod damper 21 which is deviated outward from the edge of the fixing plate 12a. The jacks 3, 3,... Installed on the other side of the frame 1 abut against the side surface of the base plate 11a, and are operated and extended while adjusting the extrusion amounts of the rams 3a in these different directions. The lower base plate 11a is pressed in an appropriate direction, and when the bolt holes 13 in the lower base plate 11a and the bolt holes 13a in the lower fixing plate 12a coincide with each other, the fixing bolt 15a is screwed into the long nut 17a in the lower building frame 30. At the same time, the mounting of the steel rod damper 21 is terminated simultaneously with the completion of the position adjustment. The jack may be either a hydraulic type or a mechanical type.

The upper base plate 11b of the steel bar damper 21 is connected to the upper fixing plate 12 of the upper building frame 31.
When the fixing bolt 15b is inserted in accordance with FIG.
As shown in (A), if at least two through holes 18b and 19b penetrating the upper base plate 11b and the upper fixing plate 12b are formed in advance, temporary fixing for alignment with these holes is performed. By inserting the rod 23,
The positions of the holes for the fixing bolts 15b drilled in the upper base plate 11b and the upper fixing plate 12b can be simultaneously adjusted at the front, and the work efficiency of fixing the upper base plate 11b to the upper fixing plate 12b is improved. Also,
Similarly, the lower base plate 11a and the lower fixing plate 1
If at least two through holes 18a, 19a (see FIG. 1 (B)) are previously formed in the hole 2a, the temporary fixing rod is set when the positions of the bolt holes 13 and 13a coincide with the adjustment by the jack 3. If the jack 23 is inserted, the lower base plate 11a will not move even if a trouble such as a drop in the hydraulic pressure of the jack 3 occurs or the jack 3 comes off, so that the fixing bolt 15a can be safely attached.

[0013] With this configuration, in the replacement work of the seismic isolation member interposed between the lower building skeleton and the upper building skeleton, a displacement occurs between the seismic isolation member and the bolt hole. However, if the upper end of the seismic isolation member is attached to the upper building frame first, the work for correcting hole slippage only needs to be performed between the lower end of the seismic isolation member and the lower building frame. In addition, the displacement can be sufficiently adjusted even with a small-capacity jack, and the cost is low.

FIG. 4 shows a second embodiment of the method and apparatus for adjusting the position of the seismic isolation member of the present invention, and FIG. 4A is a sectional view of the position adjustment or correction of the seismic isolation member (FIG. 4).
FIG. 4B is a view taken in the direction of the arrow G in FIG. 4A, and FIG. 4C is an enlarged view of a portion F in FIG. 4A. According to the present embodiment, similarly to the above-described embodiment, the flat frame 1 closed in the shape of a mouth is provided with the lower base plate 11a in the steel rod damper 21 and the lower fixing plate 12a in the lower building frame 30. And the lower base plate 1 at the end of the ram 3 a of the jack 3 and the lower end of the seismic isolation member 20.
A supporting plate 4 having a substantially L-shape or a constant thickness is preferably interposed between the supporting plate 1a and the supporting plate 1a. The support plate 4 also functions as a spacer that compensates for the insufficient stroke of the jack. Further, a spacer 5 is provided inside the frame 1 on the opposite side of the jack 3. The spacer 5 may be a steel material or a material such as hard rubber.

Originally, the lower fixing plate 12a of the frame 1
It is better that the point of pressing of the seismic isolation member 20 against the lower base plate 11a by the support point of the jack 3 and the tip of the ram 3a does not shift much up and down. As a result, the lower base plate 11a has a tendency to float, and an eccentric bending stress is generated in the ram 3a. In the present embodiment, the supporting plate 4 having a substantially L-shape or a constant thickness is interposed between the tip of the ram 3a of the jack 3 and the lower base plate 11a at the lower end of the seismic isolation member 20. Of the lower fixing plate 12a on the opposite side.
Base plate 11a to approach the support point of
4C or 4D, the ram 3a is pressed by the support plate 4 as shown in FIG. 4 (C) or FIG. 4 (D).
Since the verticality of the pressing surface is maintained, the ram 3a can be pressed and moved in the horizontal direction without generating bending stress.

That is, when the support plate 4 is formed in a substantially L shape or a plate shape having a certain thickness, the lower building frame 3
0, the bottom surface of the support plate 4 that is in sliding contact with the top end is the support plate 4
The lower base plate 11a is smoothly pressed and moved by the ram 3a while guiding its own horizontal movement.
When the spacer 5 is provided inside the frame 1 on the side opposite to the jack 3, a constant contact surface is secured between the inner surface of the frame 1 and the lower fixing plate 12a, so that high strength without stress concentration is obtained. Adjustment work is possible. When a hard rubber or the like is used as the spacer 5, the lower fixing plate 12
a can protect the coating on the outer surface.

FIG. 5 shows a third embodiment of the method and apparatus for adjusting the position of a seismic isolation member according to the present invention. FIG. 5A shows an isolator formed by alternately stacking rubber and metal plates. FIG. 5B is a perspective view showing a seismic isolation member made of FIG.
It is a top view in position adjustment of the seismic isolation member in FIG. In this embodiment, the seismic isolation member includes the isolator 22 and the upper base plate 11b and the lower base plate 11a fixed to the upper and lower ends thereof. Therefore, since the upper and lower base plates 11b and 11a each have a plane circular shape, the spacer 5 interposed between the frame 1 and the lower fixing plate 12a and the ram 3a of the jack 3 and the lower base plate 11a Are formed with a circular contact surface with the supporting plate 4 interposed therebetween. The behavior of each part at the time of position adjustment in the present embodiment is substantially the same as that of the above-described embodiment, and a description thereof will be omitted. However, the presence of the circular contact surface prevents the pressing of the ram 3a and the support of the lower fixing plate 12a. Since the condition is stable, it is possible to work safely.

The embodiments of the present invention have been described above. However, within the scope of the present invention, the shapes and types of the dampers or isolators constituting the seismic isolation member and the upper and lower base plates and the fixing form between them are described. , The shape of the upper fixing plate and its mounting form on the upper building frame, the shape of the lower fixing plate and its mounting form on the lower building frame,
Attachment form of seismic isolation members to upper and lower building frame, frame shape, jack type, jack mounting configuration to frame, support plate and spacer shape,
It goes without saying that the material and the like can be appropriately adopted.

[0019]

As described above in detail, according to the present invention, there is provided a method for adjusting the position of a seismic isolation member in a work of replacing a seismic isolation member interposed between a lower building frame and an upper building frame. After the upper end of the seismic isolation member is fixed to the upper building frame, the lower end of the seismic isolation member is fixed to the lower building frame after correcting the displacement with respect to the lower building frame. Even if there is a displacement between the member and the bolt hole, if the upper end of the seismic isolation member is attached to the upper building frame first, the hole displacement correction work will be performed between the lower end of the seismic isolation member and the lower building frame. Therefore, not only the workability can be improved, but also the adjustment work can be sufficiently performed even with a small adjustment device, and can be adapted to work in a narrow place such as a seismic isolation pit. Further, in a position adjusting device for a seismic isolation member used to correct a displacement of a lower end portion of the seismic isolation member with respect to a lower building frame, a plurality of inwardly-operating members are provided on an inner surface of a closed planar frame. By installing the individual jacks, the displacement can be sufficiently adjusted even with a small-capacity jack, which is a common device that can be carried by human power by utilizing the inner space of the frame, and is inexpensive.

Further, the direction of the plurality of jacks is 2
By setting the direction to be greater than or equal to the direction, it is possible to appropriately adjust the position of the bolt hole in the seismic isolation member and the bolt hole in the lower building frame in an arbitrary direction. Further, when a supporting plate is interposed between the ram tip of the jack and the lower end of the seismic isolation member, the lower center of the jack is adjusted so that the axis of the ram is close to the support point of the lower fixing plate on the opposite side. Even if the lower side of the base plate is pressed, the jack ram can be pressed and moved in the horizontal direction without generating bending stress. Further, when a spacer is provided inside the frame on the opposite side of the jack, a constant contact surface is secured between the inner surface of the frame and the lower fixing plate to adjust the work with high strength without stress concentration. When hard rubber or the like is used as the spacer, the coating on the outer surface of the lower fixing plate can be protected. Thus, according to the present invention, there is provided a method and an apparatus for adjusting the position of a seismic isolation member, which can quickly and economically correct a hole displacement of a fixing bolt of the seismic isolation member by a simple method.

[Brief description of the drawings]

1A and 1B show a first embodiment of a method and an apparatus for adjusting the position of a seismic isolation member of the present invention. FIG. 1A is a cross-sectional view during position adjustment or correction of the seismic isolation member, and FIG. Figure 1)
It is an arrow B view of (A).

2 (A) is a plan view of a seismic isolation member (in the case of a steel rod damper), and FIG. 2 (B) is a view on arrow D of FIG. 2 (A).

FIG. 3 is a view corresponding to the arrow A after the position of the seismic isolation member is adjusted.

4A and 4B show a second embodiment of a method and an apparatus for adjusting the position of a seismic isolation member according to the present invention, wherein FIG. 4A is a cross-sectional view during position adjustment or correction of the seismic isolation member, and FIG. ) Is FIG.
FIG. 4A is a view taken in the direction of the arrow G, and FIGS.
It is the F section enlarged view of (A).

5A and 5B show a third embodiment of a method and an apparatus for adjusting the position of a seismic isolation member according to the present invention. FIG. 5A is a perspective view showing a seismic isolation member including an isolator, and FIG. FIG.
It is a top view in position adjustment of the seismic isolation member in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Frame 2 ... Jack receiver 3 ... Jack 3a ... Ram 4 ... Support plate 5 ... Spacer 11a ... Lower base plate 11b ... Upper base plate 12a ... Lower fixing plate 12b ... · Upper fixing plate 13 ··· Bolt hole 13a ··· Bolt hole 14 ··· Spelling plate 14a ··· Bolt 15a ··· Fixed bolt 15b ··· Fixed bolt 16 ··· Stud 17 ··· Anchor bolt 17a ··· Length Nut 18a ... through hole 18b ... through hole 19a ... through hole 19b ... through hole 20 ... seismic isolation member 21 ... steel bar damper 22 ... isolator 23 ... temporary fixing bar 24 ...・ Mounting bolts 30 ・ ・ ・ Lower building frame 31 ・ ・ ・ Upper building frame

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshiaki Hashi 3-4-5 Toyosu, Koto-ku, Tokyo Inside Tomogiken Co., Ltd. (72) Inventor Takashi Shimanuki 3-4-5 Toyosu, Koto-ku, Tokyo Stock Company Tomoe Giken F term (reference) 2D046 DA12 3J048 AA01 BC07 CB30 DA03 EA38

Claims (5)

[Claims] In a method for adjusting the position of a seismic isolation member in a work of replacing a seismic isolation member interposed between a lower building frame and an upper building frame, an upper end of the seismic isolation member is fixed to the upper building frame. A method of adjusting the position of the seismic isolation member, wherein the lower end of the seismic isolation member is fixed to the lower building frame after correcting the positional deviation from the lower building frame. 2. A position adjusting device for a seismic isolation member used to correct a displacement of a lower end portion of the seismic isolation member with respect to a lower building frame, wherein the inner surface of the closed planar frame is directed inward. A position adjusting device for a seismic isolation member, comprising a plurality of jacks that operate. 3. An apparatus according to claim 2, wherein the plurality of jacks are oriented in two or more directions. 4. The position adjusting device for a seismic isolation member according to claim 2, wherein a bearing plate is interposed between a ram tip of the jack and a lower end of the seismic isolation member. 5. The position adjusting device for a seismic isolation member according to claim 2, wherein a spacer is provided inside the frame on a side opposite to the jack.