JP6779833B2 - How to install the damper - Google Patents

Description

The present invention relates to a damper mounting method for mounting a damper to a structure.

Conventionally, a damper for absorbing vibration energy is installed in a structure such as a bridge in order to improve its seismic resistance, seismic isolation, and vibration control. For example, in the case of a bridge, a damper is installed between the substructure of the pier or abutment and the superstructure of the bridge girder.

As a method of mounting such a damper, the damper is arranged between the mounting surfaces of the structure, one end of the damper is fixed to one mounting surface of the structure, the damper is stretched, and then the other end of the damper is the structure. A method of fixing to the other mounting surface of the above is known (see, for example, Patent Document 1).

In the method of Patent Document 1, a damper is arranged between the mounting surfaces of the structure, and one mounting surface of the damper is fixed to one mounting surface of the structure. Then, a plurality of tapered screws are inserted into the plurality of through bolt holes opened in the other mounting surface of the damper and the other mounting surface of the structure, and the side of the structure of each tapered screw opposite to the other mounting surface. A jack called a center hole jack (registered trademark) is attached to the portion protruding from the surface.

Further, a mounting plate is passed to a portion of these jacks that protrudes to the opposite side of the taper screw, and is fixed with bolts. In this state, by driving each jack, the side of the other mounting surface of the damper is attracted to the other mounting surface of the structure via each taper screw, and the damper is stretched.

When the damper is extended and the other mounting surface is in close contact with the other mounting surface of the structure, the other mounting surface of the damper is bolted and nutted through the bolt holes into which the taper screws are not inserted. It is fixed to the other mounting surface. After that, each jack and the taper screw are removed, and bolts are further tightened through the bolt holes from which the jacks have been removed to complete the installation of the damper.

Japanese Unexamined Patent Publication No. 2013-199776

However, according to the method of Patent Document 1, it is necessary to use a taper screw when extending the damper with a jack. Further, when installing the jack, it is necessary to fix the mounting plate to the jack, and when removing the jack, it is necessary to remove the mounting plate.

Further, in order for the tapered portion of the taper screw to function and positioning the other mounting surface of the damper and the other mounting surface of the structure, these mounting surfaces must be in close proximity to each other. .. Therefore, the method of Patent Document 1 is not suitable when the distance between the other mounting surface of the damper before extension and the other mounting surface of the structure is large.

An object of the present invention is to provide a method for easily attaching a damper even when the distance between the structure and the damper is large in view of the problems of the prior art.

The damper mounting method according to the first invention is
A method of mounting a damper having a damper-side first mounting surface at one end and a damper-side second mounting surface at the other end between the structure-side first mounting surface and the structure-side second mounting surface of the structure. And
The damper is arranged between the first mounting surface on the structure side and the second mounting surface on the structure side, and the first mounting surface on the damper side is fixed to the first mounting surface on the structure side to fix the structure. The first step of facing the second mounting surface on the side and the second mounting surface on the damper side at a distance from each other, and
After the first step, a traction bolt is inserted into the penetrating first bolt hole opened in the damper side second mounting surface and the corresponding penetrating second bolt hole opened in the structure side second mounting surface. The second step of inserting and
After the second step, a third step of attaching a traction force applying device for applying a traction force to the traction bolt to extend the damper to the traction bolt, and
After the third step, a traction force is applied to the traction bolt by the traction force applying device to extend the damper, and a fourth mounting surface on the damper side and a second mounting surface on the structure side are brought into contact with each other. Process and
After the first step and before the contact in the fourth step, an opening is made in the through third bolt hole which opens in the second mounting surface on the damper side and the corresponding second mounting surface on the structure side. A fifth step of passing a guide bolt that guides the third bolt hole through the fourth bolt hole that has penetrated the third bolt hole so that the third bolt hole is positioned at the fourth bolt hole at the time of contact.
After the fourth step, the guide bolt is removed, a mounting bolt is passed through the third bolt hole and the fourth bolt hole, and a nut is attached to the mounting bolt to attach the damper side second mounting surface and the structure. The sixth step of applying a fastening force between the second mounting surfaces on the side and
After the fourth step, the traction force applying device and the traction bolt are removed, a mounting bolt is passed through the first bolt hole and the second bolt hole, and a nut is attached to the mounting bolt to apply the fastening force. It is characterized by including a seventh step.

In the first invention, in the fourth step, when a traction force is applied to the traction steel rod by the traction force applying device, the force at which the second mounting surface on the damper side is attracted to the second mounting surface on the structure side with respect to the damper. Works. As a result, the damper extends and the second mounting surface on the damper side comes into contact with the second mounting surface on the structure side. During this time, the guide bolts passed through the third bolt hole and the fourth bolt hole in the fifth step guide the third bolt hole so as to be positioned at the fourth bolt hole.

Therefore, by using an appropriately long guide bolt, both mounting surfaces are used even when the distance between the second mounting surface on the damper side and the second mounting surface on the structure side before the fourth step is relatively large. Can finally be brought into contact without causing misalignment. Further, unlike the conventional case, it is not necessary to use a special taper screw or prepare a mounting plate, and it is not necessary to take the trouble of mounting and removing the mounting plate.

Therefore, the damper can be easily and surely mounted even when the distance between the second mounting surface on the structure side and the second mounting surface on the damper side before the extension of the damper is large. It should be noted that the sixth step and the seventh step may be after the fourth step, and may be after that.

In the first invention, the damper mounting method according to the second invention is a nut mounted on the guide bolt after the fourth step, in the fourth step, or after the fourth step, instead of the sixth step. It is characterized by including an eighth step of applying a fastening force between the second mounting surface on the damper side and the second mounting surface on the structure side.

According to the second invention, after the fourth step, in the eighth step, the guide bolt is used as it is to apply a fastening force between the second mounting surface on the damper side and the second mounting surface on the structure side. Can be done. Therefore, the number of mounting bolts can be reduced, the trouble of replacing the guide bolts with mounting bolts can be saved, and the damper can be mounted more easily.

The damper mounting method according to the third invention is characterized in that, in the first invention, a towing steel rod having male threads at both ends is used instead of the towing bolt. According to the third invention, as in the first invention, the damper can be easily and surely attached even when the distance between the second attachment surface on the structure side and the second attachment surface on the damper side before the extension of the damper is large. it can. The male screws at both ends of the traction steel rod are attached with nuts necessary for applying the traction force to the traction steel rod by the traction force applying device.

The damper mounting method according to the fourth invention is characterized in that, in the first or third invention, a guide steel rod is used instead of the guide bolt. According to the fourth invention, as in the case of the first invention, the guide having an appropriate length even when the distance between the second mounting surface on the structure side and the second mounting surface on the damper side before the extension of the damper is large. By using a steel rod, the damper can be easily and surely attached.

The damper mounting method according to the fifth invention is described in the first invention.
Instead of the guide bolt, a guide steel rod having male threads at both ends is used.
Instead of the sixth step, after the fourth step, in the fourth step, or after the fourth step, the second mounting surface on the damper side and the structure are provided by nuts attached to both ends of the guiding steel rod. It is characterized by having a ninth step of applying a fastening force between the second mounting surfaces on the object side.

After the fourth step, in the ninth step, the guiding steel rod can be used as it is to apply a fastening force between the second mounting surface on the damper side and the second mounting surface on the structure side. Therefore, the number of mounting bolts can be reduced, the trouble of replacing the guide bolts with mounting bolts can be saved, and the damper can be mounted more easily.

It is a figure which shows the state when the 1st process of the damper attachment method which concerns on one Embodiment of this invention is completed. It is a figure which shows the state when the 3rd step and 5th steps of the damper attachment method are completed. It is a figure which shows the state in the process of performing the 4th process of the damper attachment method. It is a figure which shows the state when the 7th process of the damper attachment method is completed. It is a figure which shows the arrangement of the bolt hole on the damper side 2nd mounting surface and the structure side 2nd mounting surface in the damper mounting method. It is a figure which shows the other example of a 2nd mounting surface on a damper side and 2nd mounting surface on a structure side, FIG. 6A is an example having 4 bolt holes, FIG. 6B is an example having 8 bolt holes, and FIG. 6C is a bolt. Another example of having eight holes is shown.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The damper attached by the damper attachment method according to the embodiment of the present invention imparts sufficient seismic resistance, seismic isolation, and vibration damping properties in a bridge, and has a weight of, for example, several tons. As shown in FIG. 1, the damper 1 is attached between the substructure bracket 3 provided on the substructure 2 of the bridge and the superstructure bracket 5 provided on the superstructure 4.

The damper 1 has a damper-side first mounting surface 6 at one end and a damper-side second mounting surface 7 at the other end. The first mounting surface 6 on the damper side and the second mounting surface 7 on the damper side are each composed of two mountain clevis 8s provided at both ends of the damper 1. The damper 1 is provided with a cover 9 for preventing rainwater from entering.

The substructure bracket 3 has a structure-side first mounting surface 10 to which the damper-side first mounting surface 6 is joined. The superstructure bracket 5 has a structure-side second mounting surface 11 to which the damper-side second mounting surface 7 is joined.

The first mounting surface 10 on the structure side and the first mounting surface 6 on the damper side are opened with a plurality of penetrating bolt holes (drill holes) for fastening them to each other by bolting. Similarly, a plurality of through bolt holes are opened in the second mounting surface 11 on the structure side and the second mounting surface 7 on the damper side.

The bolt holes on the second mounting surface 11 on the structure side and the second mounting surface 7 on the damper side are used differently. That is, as shown in FIG. 5, for example, the first bolt holes 7a which are the bolt holes at the four corners of the damper side second mounting surface 7 and the second bolt holes 11a which are the bolt holes at the four corners of the structure side second mounting surface 11 Is used to stretch the damper 1 by a center hole jack (registered trademark) 12 (see FIG. 2) as a traction force applying device described later.

The third bolt hole 7b, which is another bolt hole of the second mounting surface 7 on the damper side, and the fourth bolt hole 11b, which is another bolt hole of the second mounting surface 11 on the structure side, are the guide bolts 13 as described later. It is used to pass through (see FIG. 2).

When attaching the damper 1, first, the substructure bracket 3 and the superstructure bracket 5 are installed on the upper surface of the substructure 2 and the lower surface of the lower chord member 14 of the superstructure 4, respectively, and are finally fixed. At this time, a non-shrink mortar is filled between the substructure bracket 3 and the substructure 2 so that the substructure bracket 3 does not move when the length of the damper 1 is adjusted later.

At this time, the distance between the second mounting surface 11 on the structure side and the second mounting surface 7 on the damper side includes fluctuations in temperature, measurement errors in the length of the damper 1, and mounting of the substructure bracket 3 and the superstructure bracket 5. Appropriate size so that the damper 1 fits between the structure-side first mounting surface 10 and the structure-side second mounting surface 11 regardless of errors, and the damper 1 functions normally even when the situation changes. It is set to.

Next, as shown in FIG. 1, the damper 1 is arranged between the structure-side first mounting surface 10 of the substructure bracket 3 and the structure-side second mounting surface 11 of the superstructure bracket 5, and is arranged on the structure side. The first mounting surface 6 on the damper side is temporarily fixed to the first mounting surface 10, and the second mounting surface 11 on the structure side and the second mounting surface 7 on the damper side are opposed to each other at intervals (first step).

At this time, since the damper 1 has a weight of several tons, when the damper 1 is arranged between the first mounting surface 10 on the structure side and the second mounting surface 11 on the structure side, a chain block or the like is suspended. Means 15 are used, and if necessary, a method such as horizontal pulling is used.

Next, as shown in FIG. 2, the first bolt holes 7a (see FIG. 5) at the four corners of the damper side second mounting surface 7 and the second corners of the structure side second mounting surface 11 paired with these first bolt holes 7a (see FIG. 5). The four towing bolts 16 are inserted into the bolt holes 11a (see FIG. 5) so that the tip side protrudes from the second bolt hole 11a (second step).

Next, as shown in FIG. 2, the center hole jack (registered trademark) 12 (hereinafter, simply “jack 12”” is used with respect to the towing bolt 16 protruding from the second bolt hole 11a of the second mounting surface 11 on the structure side. ) Is attached (third step). At this time, the tip of the towing bolt 16 is fixed to the jack 12. The jack 12 has a function of applying a traction force in the protruding direction to the traction bolt 16 to extend the damper 1.

Next, as shown in FIG. 2, a penetrating third bolt hole 7b that opens in the damper side second mounting surface 7 and a penetrating fourth bolt hole 11b that opens in the corresponding structure side second mounting surface 11 The guide bolt 13 is passed through (see FIG. 5) (5th step). The guide bolt 13 has a third bolt hole 7b so that the third bolt hole 7b is positioned at the fourth bolt hole 11b when the second mounting surface 7 on the damper side and the second mounting surface 11 on the structure side are brought into contact with each other. It has a function to guide.

The diameter of the center hole of the jack 12 is smaller than the diameter of the first bolt hole 7a and the second bolt hole 11a. For example, the former is φ38 mm, while the latter is φ52 mm. Therefore, the guide function of the guide bolt 13 as described above works effectively to correctly position the second mounting surface 7 on the damper side and the second mounting surface 11 on the structure side.

Next, as shown in FIG. 3, a traction force is applied to the traction bolt 16 by the jack 12 to extend the damper 1 and bring the damper side second mounting surface 7 into contact with the structure side second mounting surface 11 ( Fourth step). At this time, the third bolt hole 7b is positioned in the fourth bolt hole 11b by the guide bolt 13 passed through the third bolt hole 7b and the fourth bolt hole 11b described above. Further, while the damper 1 is being extended, a nut may be attached to the guide bolt 13 from the tip end side thereof so that the amount of screwing thereof is increased according to the extension of the damper 1.

Next, as shown in FIG. 4, the guide bolt 13 is removed, the mounting bolt 20 is passed through the third bolt hole 7b and the fourth bolt hole 11b, the nut 21 is attached to the mounting bolt 20, and the second mounting on the damper side is performed. A fastening force is applied between the surface 7 and the second mounting surface 11 on the structure side (sixth step). At this time, the nut 21 is finally fixed.

Next, the jack 12 and the towing bolt 16 are removed, the mounting bolt 20 is passed through the first bolt hole 7a and the second bolt hole 11a (see FIG. 5), and the nut 21 is attached to the mounting bolt 20 to give a fastening force. (7th step). At this time, the nut 21 is finally fixed. As a result, the damper side second mounting surface 7 is fixed to the structure side second mounting surface 11.

At this time, if any of the bolt holes on the damper side second mounting surface 7 and the structure side second mounting surface 11 in FIG. 5 has neither the towing bolt 16 nor the guide bolt 13 inserted. The mounting bolts 20 and nuts 21 are also attached to the bolt holes and are finally fixed.

Further, by finally fixing the temporarily fixed first mounting surface 10 on the structure side and the first mounting surface 6 on the damper side, the mounting of the damper 1 is completed.

As described above, according to the present embodiment, by using the appropriately long guide bolt 13, between the second mounting surface 7 on the damper side and the second mounting surface 11 on the structure side before the extension of the damper 1. Even when the distance is relatively large, both mounting surfaces can finally be brought into contact with each other without causing misalignment.

In particular, when the damper 1 is installed between a substructure 2 such as a pier or a bridge stand of a bridge as a structure and a superstructure 4 such as a lower chord member 14, the first mounting surface 10 on the structure side and the first mounting surface on the structure side 10 are installed. 2 The difference between the distance between the mounting surface 11 and the length of the damper 1 before extension fluctuates greatly due to changes in temperature and measurement errors. Even in such a case, the difference in length can be set sufficiently longer than in the case of the conventional construction method, so that the damper 1 can be used between the first mounting surface 10 on the structure side and the second mounting surface 11 on the structure side without any trouble. It can be placed between them.

Further, unlike the conventional case, it is not necessary to use a special taper screw or prepare a mounting plate, and it is not necessary to take the trouble of mounting and removing the mounting plate.

Therefore, even when the distance between the structure-side second mounting surface 11 and the damper-side second mounting surface 7 before the extension of the damper 1 is large, the damper 1 can be mounted easily and reliably.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto. For example, the guide bolt 13 is replaced with the mounting bolt 20, and the nut 21 is attached to the mounting bolt 20 to apply a fastening force between the second mounting surface 7 on the damper side and the second mounting surface 11 on the structure side (first). 6 steps) Instead, the guide bolt 13 may be used as it is, and the above fastening force may be applied by the nut attached to the guide bolt 13 (8th step).

The nut is attached to the guide bolt 13 while the damper 1 is extended by the jack 12 and the second mounting surface 7 on the damper side and the second mounting surface 11 on the structure side are brought into contact with each other (fourth step). Therefore, the damper 1 whose screwing amount is increased according to the extension of the damper 1 can be used as it is. Further, the nut may be a nut attached to the guide bolt 13 after the contact between the second mounting surface 7 on the damper side and the second mounting surface 11 on the structure side.

Further, in this case, it is preferable to use the guide bolt 13 having the same length as the above-mentioned mounting bolt 20 in terms of appearance. However, in this case, the length of the guide bolt 13 is the distance between each mounting surface at the completion of the first step in which the second mounting surface 11 on the structure side and the second mounting surface 7 on the damper side are opposed to each other at a distance from each other. Since the guide bolt 13 is shorter than the above, when the second mounting surface 7 on the damper side and the second mounting surface 11 on the structure side come close to each other (in the middle of the fourth step), the third bolt hole 7b and the third bolt hole 7b It is passed through the 4-bolt hole 11b.

According to this, after the fourth step, in the eighth step, the guide bolt 13 is used as it is to apply a fastening force between the second mounting surface 7 on the damper side and the second mounting surface 11 on the structure side. be able to. Therefore, the number of the mounting bolts 20 can be reduced, the trouble of replacing the guide bolts 13 with the mounting bolts 20, and the damper 1 can be mounted more easily.

Further, instead of the towing bolt 16, a towing steel rod having male threads at both ends may be used. In this case, when the jack 12 is attached to the towing steel rod, a nut is also applied to the end of the towing steel rod on the side protruding from the first bolt hole 7a so that the traction force is applied to the towing steel rod by the jack 12. Is attached.

Further, a guide steel rod may be used instead of the guide bolt 13. In this case as well, the third bolt hole 7b can be correctly positioned in the fourth bolt hole 11b by the guide steel rod passed through the third bolt hole 7b and the fourth bolt hole 11b.

Further, instead of the guide bolt 13, a guide steel rod having male threads at both ends may be used. In this case, after the second mounting surface 7 on the damper side and the second mounting surface 11 on the structure side are brought into contact with each other, the second mounting surface 7 on the damper side and the structure are provided with nuts attached to both ends of the guide steel rod. A fastening force may be applied between the side second mounting surfaces 11 (9th step). In this case, it is preferable to use a guide steel rod having the same length as the above-mentioned mounting bolt 20 in terms of appearance.

However, in this case, since the length of the guide steel rod is short, the guide steel rod is used when the damper side second mounting surface 7 and the structure side second mounting surface 11 are close to each other (during the fourth step). ), It is passed through the third bolt hole 7b and the fourth bolt hole 11b.

As the nuts attached to both ends of the guide steel rod, the damper 1 is extended by the jack 12 and the damper side second attachment surface 7 and the structure side second attachment surface 11 are brought into contact with each other (fourth step). In between, it can be used as it is, which is attached to a guide steel rod and whose screwing amount is increased according to the extension of the damper 1. It may be a nut attached after the contact. According to this, the number of the mounting bolts 20 can be reduced, the trouble of replacing the guide steel rod with the mounting bolts 20 can be saved, and the damper 1 can be mounted more easily.

The second mounting surface on the damper side and the second mounting surface on the structure side are not limited to those in FIG. 5, and for example, the second mounting surfaces on the damper side 27, 37, 47 and the structure as shown in FIGS. 6A to 6C. The second mounting surfaces on the object side may be 31, 41, 51.

However, in FIG. 6A, when the second mounting surface 27 on the damper side and the second mounting surface 31 on the structure side face each other, the first bolt hole 7a and the second bolt hole 11a correspond to each other, and the third bolt hole 7b It is assumed that the display is inverted upside down so as to correspond to the fourth bolt hole 11b. The same applies to the case of FIG. 6B.

The damper-side second mounting surface 27 of FIG. 6A has two first bolt holes 7a and two third bolt holes 7b diagonally in each set. Correspondingly, the structure-side second mounting surface 31 of FIG. 6A also has two penetrating second bolt holes 11a and four fourth bolt holes 11b on each diagonal.

The second mounting surface 37 on the damper side in FIG. 6B has four bolt holes arranged in two rows. One set of diagonal bolt holes is used as the first bolt hole 7a, and the other bolt holes are used as the third bolt hole 7b. Correspondingly, the second mounting surface 41 on the structure side of FIG. 6B also has a second bolt hole 11a and a fourth bolt hole 11b.

The second mounting surface 47 on the damper side in FIG. 6C has four bolt holes arranged in two rows. The bolt holes at the four corners are used as the first bolt holes 7a, and the other bolt holes are used as the third bolt holes 7b. Correspondingly, as for the bolt holes of the second mounting surface 51 on the structure side in FIG. 6C, the bolt holes at the four corners are similarly used as the second bolt holes 11a, and the other bolt holes are the fourth bolts. It is used as the hole 11b.

The positions of the first bolt hole 7a and the second bolt hole 11a into which the towing bolt 16 or the towing steel rod is inserted do not necessarily have to be at the four corners, but may be other positions. However, it is desirable that these positions are rotationally symmetric with respect to the central axis of the damper 1.

Further, there is a step of reducing the frictional force generated between the surface of the traction bolt 16 and / or the guide bolt 13 and the corresponding first to fourth bolt holes 7a, 11a, 7b, 11b. You may. As a measure for reducing the frictional force, for example, the surfaces of the towing bolt 16 and the guide bolt 13 are coated with a friction-reducing resin such as Teflon (registered trademark), a lubricating oil or grease is applied, or a sheet is applied. It corresponds to wrapping Teflon (registered trademark) in the form.

Alternatively, measures are taken to reduce the frictional force on the inner diameter surfaces of the first to fourth bolt holes corresponding to the towing bolt 16 and / or the guide bolt 13, or the gap (clearance) between the bolt and the bolt hole, for example. , Cylindrical sliding members may be arranged.

According to this, the tow bolt 16 and the guide bolt 13 move smoothly in the corresponding first to fourth bolt holes 7a, 11a, 7b, 11b, so that the tow bolt 16 and the guide bolt 13 The damper 1 is smoothly extended without damaging the contact portions with the corresponding first to fourth bolt holes 7a, 11a, 7b, 11b, and the damper side second mounting surface 7 is attached to the structure side second mounting. It can be accurately positioned with respect to the surface 11.

Further, the guide bolt 13 is inserted into the third bolt hole 7b and the fourth bolt hole 11b after the damper side first mounting surface 6 is temporarily fixed to the structure side first mounting surface 10 and is on the damper side. This may be performed at any timing before the second mounting surface 7 and the second mounting surface 11 on the structure side are brought into contact with each other.

Further, the damper 1 is temporarily fixed to the second mounting surface 11 on the structure side of the superstructure bracket 5, and the damper 1 is extended to the first mounting surface 10 on the structure side of the substructure bracket 3 to reach the first mounting surface on the structure side. 1 It may be fixed to the mounting surface 10.

Further, the jack 12 may be installed on the surface of the damper 1 on the back side of the second mounting surface 7 on the damper side.

1 ... Damper, 2 ... Substructure, 3 ... Substructure bracket, 4 ... Superstructure, 5 ... Superstructure bracket, 6 ... Damper side first mounting surface, 7, 27, 37, 47 ... Damper side second mounting surface, 7a ... 1st bolt hole, 7b ... 3rd bolt hole, 8 ... Futatsu clevis, 9 ... Cover, 10 ... Structure side first mounting surface, 11, 31, 41, 51 ... Structure side second mounting surface, 11a ... 2nd bolt hole, 11b ... 4th bolt hole, 12 ... jack, 13 ... guide bolt, 14 ... lower chord material, 15 ... hanging means, 16 ... towing bolt, 21 ... nut, 20 ... mounting bolt.

Claims (5)

A method of mounting a damper having a damper-side first mounting surface at one end and a damper-side second mounting surface at the other end between the structure-side first mounting surface and the structure-side second mounting surface of the structure. And
The damper is arranged between the first mounting surface on the structure side and the second mounting surface on the structure side, and the first mounting surface on the damper side is fixed to the first mounting surface on the structure side to fix the structure. The first step of facing the second mounting surface on the side and the second mounting surface on the damper side at a distance from each other, and
After the first step, a traction bolt is inserted into the penetrating first bolt hole opened in the damper side second mounting surface and the corresponding penetrating second bolt hole opened in the structure side second mounting surface. The second step of inserting and
After the second step, a third step of attaching a traction force applying device for applying a traction force to the traction bolt to extend the damper to the traction bolt, and
After the third step, a traction force is applied to the traction bolt by the traction force applying device to extend the damper, and a fourth mounting surface on the damper side and a second mounting surface on the structure side are brought into contact with each other. Process and
After the first step and before the contact in the fourth step, an opening is made in the through third bolt hole which opens in the second mounting surface on the damper side and the corresponding second mounting surface on the structure side. A fifth step of passing a guide bolt that guides the third bolt hole so that the third bolt hole is positioned at the fourth bolt hole at the time of contact with the fourth bolt hole that has penetrated.
After the fourth step, the guide bolt is removed, a mounting bolt is passed through the third bolt hole and the fourth bolt hole, and a nut is attached to the mounting bolt to attach the damper side second mounting surface and the structure. The sixth step of applying a fastening force between the second mounting surfaces on the side and
After the fourth step, the traction force applying device and the traction bolt are removed, a mounting bolt is passed through the first bolt hole and the second bolt hole, and a nut is attached to the mounting bolt to apply the fastening force. A damper mounting method including a seventh step. Instead of the sixth step, after the fourth step, in the fourth step, or after the fourth step, the second mounting surface on the damper side and the second mounting surface on the structure side are provided by the nuts attached to the guide bolts. The damper mounting method according to claim 1, further comprising an eighth step of applying a fastening force between the mounting surfaces. The damper mounting method according to claim 1, wherein a pulling steel rod having male threads at both ends is used instead of the pulling bolt. The damper mounting method according to claim 1 or 3, wherein a guide steel rod is used instead of the guide bolt. Instead of the guide bolt, a guide steel rod having male threads at both ends is used.
Instead of the sixth step, after the fourth step, in the fourth step, or after the fourth step, the second mounting surface on the damper side and the structure are provided by nuts attached to both ends of the guiding steel rod. The damper mounting method according to claim 1, further comprising a ninth step of applying a fastening force between the second mounting surfaces on the object side.