JP4149089B2 - Method and apparatus for adjusting position of seismic isolation member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, when replacing an isolator or a damper, which is a seismic isolation member used in a seismic isolation building, the positional deviation of the seismic isolation member with respect to the lower building frame, that is, a hole displacement of a fixing bolt, etc. is corrected and corrected. The present invention relates to a position adjusting method and apparatus for seismic isolation members.
[0002]
[Prior art]
In a base-isolated building, an isolator or a damper, which is a base-isolating member, is interposed between a lower building frame and an upper building frame.
Conventionally, after a major earthquake, etc., there has been a displacement between the lower and upper building frames in the base-isolated building, and the isolator and damper may be severely damaged. We are making every effort to replace isolators and dampers with new ones.
[0003]
[Problems to be solved by the invention]
However, when replacing the isolator or damper interposed between the lower building frame and the upper building frame, the bolt hole of the base plate at the lower end of the seismic isolation member body and the bolt hole of the lower fixing plate in the lower building frame It is necessary to screw the fixing bolts with the same, but both of them may be caused by a slight deviation between the lower building case and the upper building case caused by the earthquake or a manufacturing error of a new seismic isolation member. In order to make these bolt holes coincide with each other, they are moved relative to each other by a large jack device between the lower building case and the upper building case, or an isolator or seismic isolation member is used. Each damper is centered using a conventional tension jig such as Lever Block (registered trademark) and requires a lot of work. It was very inefficient and uneconomical.
[0004]
Therefore, the present invention solves the problem of the conventional method for adjusting the position of the seismic isolation member, and can quickly and economically correct the displacement of the fixing bolt of the seismic isolation member by a simple method. An object is to provide a method and an apparatus for adjusting the position of a seismic member.
[0005]
[Means for Solving the Problems]
For this reason, the present invention fixes the upper end of the seismic isolation member to the upper building chassis in the method for adjusting the position of the seismic isolation member in the replacement work of the seismic isolation member interposed between the lower building chassis and the upper building chassis. After that, the position difference between the bolt hole in the lower end of the seismic isolation member and the bolt hole in the lower building frame is corrected by a plurality of jacks operating inward on the inner surface of the closed planar frame. After that , the seismic isolation member is fixed to the lower building frame.
In addition, the present invention provides a seismic isolation member used for correcting the displacement of the bolt hole at the lower end of the seismic isolation member with respect to the bolt hole in the lower building chassis after the upper end of the seismic isolation member is fixed to the upper building chassis. In the position adjusting device, a plurality of jacks that operate inward are installed on the inner surface of the closed planar frame.
The present invention is characterized in that the plurality of jacks have two or more directions.
Further, the present invention is characterized in that a bearing 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 interposed inside the frame on the side opposite to the jack, and these are used as means for solving the problems.
[0006]
Embodiment
Embodiments of the present invention will be described below with reference to the drawings.
1 to 3 show a first embodiment of a position adjusting method and apparatus for a seismic isolation member according to the present invention. FIG. 1A is a sectional view during position adjustment, that is, correction of a seismic isolation member (FIG. 1). (B) view of arrow A), FIG. 1 (B) is a view of arrow B of FIG. 1 (A), FIG. 2 (A) is a plan view of a seismic isolation member (in the case of a steel bar or damper), FIG. (B) is a view taken in the direction of arrow D in FIG. 2 (A), and FIG. 3 is a view corresponding to view in the direction of arrow A after the position adjustment of the seismic isolation member.
As shown in FIG. 1 (A), in the present invention, seismic isolation members 20 (lower base plate 11a, upper base plate 11b and upper base plate 11b, which are interposed between a lower building frame 30 and an upper building frame 31 made of concrete or the like. In the method of adjusting the position of the seismic isolation member 20 in the replacement work of the steel rod damper 21), after fixing the upper end portion (11b) of the seismic isolation member 20 to the upper fixing plate 12b of the upper building housing 31, The lower end (11a) of the seismic isolation member 20 is fixed to the lower fixing plate 12a of the lower building housing 30 after correcting the positional deviation with respect to the lower building housing 30. As a position adjusting device for the seismic isolation member 20 for correcting the displacement of the lower end portion (11a) of the seismic isolation member 20 with respect to the inner side surface of the closed planar frame 1, Which was installed a plurality of jacks 3 which operate towards is used.
[0007]
As the closed planar frame 1, an O-shaped frame as well as a mouth-shaped frame as shown in FIG.
Further, as the seismic isolation member 20, in addition to the steel rod dampers shown in the drawings, lead dampers or isolators (see FIG. 5A) configured by alternately laminating rubber and metal plates are targeted.
As shown in FIG. 2, the steel rod damper 21 is installed between a pair of lower base plate 11 a and upper base plate 11 b facing each other with four spirals arranged at four corners, and fixed by mounting bolts 24. The
When reattaching a new steel bar damper 21 to the frame of an existing building, the upper base plate 11b and the lower base plate 11a fixed to the upper and lower ends of the steel bar damper 21 are integrally replaced as seismic isolation members 20. It is done.
[0008]
Hereinafter, a method for adjusting the position of the seismic isolation member in the present embodiment will be described.
An upper fixing plate 12 b is attached to the lower portion of the upper building housing 31 by studs 16 and anchor bolts 17, and a lower fixing plate 12 a is attached to the upper portion of the lower building housing 30 by studs 16 and anchor bolts 17. The outer dimension height h ′ of the upper and lower base plates 11a, 11b of the steel rod damper 21 is made slightly lower than the inner dimension height h of the upper and lower fixing plates 12a, 12b.
In order to replace the steel rod damper 21 which is such a seismic isolation member with a new one, the old steel rod is removed by removing the fixing bolts 15a (see FIG. 3) and 15b from the long nuts 17a in the upper and lower building frames 30 and 31. After the upper and lower base plates 11b and 11a of the damper 21 are removed from the upper fixing plate 12b of the upper building housing 31 and the lower fixing plate 12a of the lower building housing 30, respectively, a new steel rod damper 21 is inserted into a predetermined position. The upper base plate 11b at the upper end of the steel rod damper 21 is fixed to the upper fixing plate 12b of the upper building housing 31 by fixing bolts 15b.
[0009]
At this time, when the bolt hole 13 in the lower base plate 11a at the lower end of the steel rod damper 21 and the bolt hole 13a in the lower fixing plate 12a of the lower building housing 30 are displaced, the fixing bolt 15a cannot be inserted. It is necessary to adjust and correct the position of the lower base plate 11a in the rod damper 21 so as to align with the bolt hole of the lower fixing plate 12a.
As shown in FIG. 1B, a planar frame 1 closed in a mouth shape is disposed so as to surround the lower base plate 11a in the steel rod damper 21 and the lower fixing plate 12a in the lower building housing 30. To do. The frame 1 is sufficiently strong and configured to have a size capable of pressing the lower base plate 11a and the lower fixing plate 12a for correction.
The planar frame 1 closed in the shape of a mouth is divided at a pair of opposite corners so as to easily surround the lower base plate 11a and the lower fixing plate 12a, and an L-shaped spelling plate 14 is formed. , 14 are fastened by bolts 14a, 14a.
[0010]
One of the frames 1 (the left side and the upper side in FIG. 1B in the illustrated example) supports the lower fixing plate 12a in the lower building housing 30, and the other side of the frame 1 (the right side and the lower side in FIG. 1B) The lower base plate 11 a in the steel rod damper 21 is supported by the jack 3.
In the present embodiment, a plurality of jacks 3 are installed on the inner side surface of the frame 1 by the jack receiver 2 so as to operate inward, and the ram 3a at the tip thereof is brought into contact with the side surface of the lower base plate 11a. .
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 right and lower sides of the frame 1 are set so that the plurality of jacks 3, 3,. Is installed. The greater the displacement of the bolt hole, the greater the resilience of the steel bar damper 21. In this case, the number of jacks is increased or replaced with a jack having a larger capacity.
[0011]
In this way, the lower base plate 11a of the steel rod damper 21 that is displaced outward from the edge of the fixing plate 12a in a state where the lower fixing plate 12a in the lower building housing 30 is supported by one of the frames 1 is provided. The lower base plate 11a of the steel rod damper 21 is brought into contact with the jacks 3, 3,... Installed on the other side of the frame 1 and extended while adjusting the push-out amounts of the rams 3a in different directions. When the bolt hole 13 in the lower base plate 11a and the bolt hole 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 housing 30. At the same time when the position adjustment of the steel bar damper 21 is completed, the mounting thereof is finished. The jack may be either a hydraulic type or a mechanical type.
[0012]
When the fixing bolt 15b is inserted by aligning the upper base plate 11b of the steel bar damper 21 with the upper fixing plate 12b in the upper building frame 31, as shown in FIG. 1A, the upper base plate 11b and the upper fixing plate 12b are inserted. If at least two through holes 18b and 19b are formed in advance, by inserting temporary fixing rods 23 for alignment into these holes, the upper base plate 11b and the upper fixing plate 12b are inserted. The positions of the holes for the fixing bolts 15b that are drilled can be aligned at the same time at the front, and the working efficiency of fixing the upper base plate 11b to the upper fixing plate 12b is improved.
Similarly, if at least two through holes 18a and 19a (see FIG. 1B) are drilled in the lower base plate 11a and the lower fixing plate 12a in advance, the bolt holes 13 can be adjusted by adjusting the jack 3. If the temporary fixing rod 23 is inserted when the positions of 13a coincide, the lower base plate 11a does not move even if troubles such as a decrease in hydraulic pressure or disconnection of the jack 3 occur, and the fixing bolt 15a is not attached. It can be done safely.
[0013]
With this configuration, even if there is a displacement between the seismic isolation member and the bolt hole in the replacement work of the seismic isolation member interposed between the lower building housing and the upper building housing, If the upper end of the seismic member is attached to the upper building case first, hole misalignment correction work can be performed between the lower end of the seismic isolation member and the lower building case, so that not only the workability is improved, but the capacity Even with a small jack, the displacement can be adjusted sufficiently and is inexpensive.
[0014]
FIG. 4 shows a second embodiment of the position adjusting method and apparatus of the seismic isolation member of the present invention. FIG. 4A is a sectional view during position adjustment, that is, correction of the seismic isolation member (FIG. 4B). 4B is a G arrow view of FIG. 4A, and FIG. 4C is an enlarged view of a portion F of FIG. 4A.
In the present embodiment, as in the above-described embodiment, the planar frame 1 closed in the shape of a mouth is divided into a lower base plate 11a in a steel rod damper 21 and a lower fixing plate 12a in a lower building housing 30. 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, preferably a bearing plate having a substantially L shape or a certain thickness. 4 is interposed. Further, the bearing plate 4 also serves as a spacer that compensates for insufficient stroke of the jack.
Further, a spacer 5 is interposed inside the frame 1 on the side opposite to the jack 3. The spacer 5 may be a steel material or a material such as hard rubber.
[0015]
Originally, the support point of the lower fixing plate 12a by the frame 1 and the pressing point of the seismic isolation member 20 to the lower base plate 11a by the tip of the ram 3a of the jack 3 should not deviate much up and down. As a result, the lower base plate 11a tends to be lifted and an eccentric bending stress is generated in the ram 3a.
In the present embodiment, since the bearing plate 4 having a substantially L shape or a certain 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, the ram 3a Even if it protrudes from the lower end of the lower base plate 11a so as to be close to the support point of the lower fixing plate 12a on the opposite side, the pressure bearing plate 4 is pressed as shown in FIG. 4C or 4D. Since the verticality of the pressing surface of the ram 3a is maintained, the ram 3a can be pressed and moved in the horizontal direction without causing bending stress.
[0016]
That is, when the bearing plate 4 is formed in a substantially L shape or a plate shape having a certain thickness, the bottom surface portion of the bearing plate 4 that is in sliding contact with the top end of the lower building housing 30 causes the horizontal movement of the bearing plate 4 itself. The lower base plate 11a is smoothly moved by the ram 3a while being guided.
Further, when the spacer 5 is provided inside the frame 1 on the side opposite to the jack 3, a certain contact surface is ensured between the inner surface of the frame 1 and the lower fixing plate 12a, and the strength is high without stress concentration. Adjustment work can be performed.
When hard rubber or the like is used as the spacer 5, the coating on the outer surface of the lower fixing plate 12a can be protected.
[0017]
FIG. 5 shows a third embodiment of the position adjusting method and apparatus of the seismic isolation member of the present invention. FIG. 5 (A) is an exemption made up of an isolator formed by alternately laminating rubber and metal plates. FIG. 5B is a perspective view showing the seismic member, and FIG. 5B is a plan view during position adjustment, that is, correction, of the seismic isolation member in FIG.
In the present embodiment, the seismic isolation member includes the isolator 22 and an upper base plate 11b and a lower base plate 11a fixed to the upper end portion and the lower end portion thereof. Therefore, since the upper and lower base plates 11b and 11a have a flat circular shape, the space between the frame 1 and the lower fixing plate 12a, the ram 3a of the jack 3, and the lower base plate 11a The bearing plate 4 interposed between each has a circular contact surface.
The behavior of each part at the time of position adjustment in the present embodiment is almost the same as that of the previous embodiment, and thus the description thereof is omitted. However, the presence of the circular contact surface causes the ram 3a to be pressed and the lower fixing plate 12a to be supported. Because the state is stable, you can work safely.
[0018]
As described above, the embodiments of the present invention have been described, but within the scope of the present invention, the shape or form of the damper or isolator and the upper and lower base plates constituting the seismic isolation member, the fixed form between them, and the upper fixing The shape of the plate and its mounting form on the upper building frame, the shape of the lower anchor plate and its mounting shape on the lower building frame, the mounting form of the seismic isolation member on the upper and lower building frames, the shape of the frame, the jack It goes without saying that the type, the installation form of the jack frame, the shape of the support plate and the spacer, the material, and the like can be adopted as appropriate.
[0019]
【The invention's effect】
As described above in detail, according to the present invention, in the method of adjusting the position of the seismic isolation member in the replacement work of the seismic isolation member interposed between the lower building housing and the upper building housing, the upper end of the seismic isolation member After fixing the lower part of the seismic isolation member to the lower building housing after fixing the lower part of the seismic isolation member to the lower building housing, the seismic isolation member and the bolt hole If the upper end of the seismic isolation member is first attached to the upper building frame, the hole misalignment correction work can be performed between the lower end of the seismic isolation member and the lower building frame. In addition to improving workability, it is possible to perform sufficient adjustment work even with small adjustment equipment, and can be applied to work in narrow places such as seismic isolation pits.
In the seismic isolation member position adjustment device used for correcting the position shift of the lower end portion of the seismic isolation member relative to the lower building frame, a plurality of inwardly acting inner surfaces of the closed planar frame By installing individual jacks, even a small capacity jack that is a common equipment that can be carried by human power using the inner space of the frame, it is possible to adjust the displacement sufficiently and it is inexpensive.
[0020]
Furthermore, by setting the direction of the plurality of jacks to two or more directions, it is possible to appropriately adjust in accordance with the displacement in any direction between the bolt hole in the seismic isolation member and the bolt hole in the lower building frame. become.
Furthermore, when a bearing plate is interposed between the jack ram tip and the lower end of the seismic isolation member, the lower ram axial center of the jack is placed 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 ram of the jack can be pressed and moved in the horizontal direction without causing bending stress.
In addition, when a spacer is interposed inside the frame on the side opposite to the jack, adjustment work with high strength without stress concentration by ensuring a constant contact surface between the inner surface of the frame and the lower fixing plate 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 capable of correcting a hole shift of a fixing bolt of the seismic isolation member quickly and economically by a simple method.
[Brief description of the drawings]
FIG. 1 shows a first embodiment of a position adjusting method and apparatus for a seismic isolation member according to the present invention. FIG. 1 (A) is a sectional view during position adjustment, that is, correction of the seismic isolation member, FIG. ) Is a view on arrow B in FIG.
2A is a plan view of the seismic isolation member (in the case of a steel rod damper), and FIG. 2B is a view as viewed from the direction of arrow D in FIG. 2A.
FIG. 3 is a view corresponding to an arrow A after adjusting the position of the seismic isolation member.
FIG. 4 shows a second embodiment of the position adjusting method and apparatus of the seismic isolation member of the present invention. FIG. 4 (A) is a sectional view during position adjustment, that is, correction of the seismic isolation member, FIG. ) Is a view taken in the direction of arrow G in FIG. 4 (A), and FIGS. 4 (C) and 4 (D) are enlarged views of a portion F in FIG. 4 (A).
5A and 5B show a third embodiment of a position adjusting method and apparatus for a seismic isolation member according to the present invention. FIG. 5A is a perspective view showing a seismic isolation member made of an isolator, and 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 receptacle 3 ... Jack 3a ... Ram 4 ... Pressure 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-fixing bolt 15b-fixing bolt 16-stud 17-anchor bolt 17a-long Nut 18a ·· through hole 18b ·· through hole 19a ·· through hole 19b ·· through hole 20 · seismic isolation member 21 · steel rod damper 22 · isolator 23 · temporary fixing rod 24 ···・ Mounting bolt 30 ... Lower building frame 31 ... Upper building frame

Claims (5)

In the method of adjusting the position of the seismic isolation member in the replacement work of the seismic isolation member interposed between the lower building housing and the upper building housing, the upper surface of the seismic isolation member is fixed to the upper building housing and then closed. After correcting the positional deviation between the bolt hole in the lower end portion of the seismic isolation member and the bolt hole in the lower building frame by a plurality of jacks operating inward on the inner surface of the shaped frame , the seismic isolation member A method for adjusting the position of a seismic isolation member, characterized in that the base is fixed to the lower building frame. In the position adjusting device for the seismic isolation member used to correct the displacement of the bolt hole at the lower end of the seismic isolation member with respect to the bolt hole in the lower building housing after fixing the upper end of the seismic isolation member to the upper building housing An apparatus for adjusting the position of a seismic isolation member, wherein a plurality of jacks operating inward are installed on an inner surface of a closed planar frame.   The position adjusting device for the seismic isolation member according to claim 2, wherein the plurality of jacks have two or more directions.   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 portion of the seismic isolation member.   The position adjusting device for a seismic isolation member according to any one of claims 2 to 4, wherein a spacer is provided inside the frame on the side opposite to the jack.

Images