JPH0380209B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention provides a rubber bearing for supporting a structure that prevents shear deformation of the rubber layer in the rubber bearing when constructing a structure such as a concrete bridge girder. This relates to a method of installing the device by sliding it while moving it.

[Prior art]

When constructing a superstructure such as a continuous bridge girder made of reinforced concrete or prestressed concrete over substructures such as abutments or piers, creep of the superstructure during construction may cause the superstructure to move against the substructure. Move relatively. Therefore, if a superstructure is constructed with rubber bearings interposed on top of the substructure, the rubber layer in the rubber bearings will undergo shear deformation during construction, and if the superstructure expands and contracts due to temperature changes after erection, the rubber Since shear deformation is further applied to the rubber layer in the bearing, the shear deformation becomes excessive and has a negative effect on the rubber layer.

As a countermeasure to this problem, it may be possible to construct the upper structure on top of the lower structure using sliding rubber bearings. In this way, a sliding plate located on the upper surface of the middle part and a sliding suppressing part located on the upper surface of the end part are provided on the upper surface of the metal support member fixed to the upper part of the lower structure, and the lower hard plate of the rubber bearing is provided. A structure in which the device is placed on the sliding plate is known.

[Problem that the invention seeks to solve]

However, when constructing an upper structure using the conventional sliding rubber bearing, there is a relatively small frictional resistance between the sliding plate and the lower hard plate of the rubber bearing, so that the upper structure When an object moves relative to the substructure, the rubber layer of the rubber support undergoes shear deformation. In addition, in the case of the conventional sliding type rubber bearing, even after the construction of the superstructure, the rubber bearing is not fixed to the bearing member having the sliding plate, so when a horizontal seismic force acts on the superstructure, the rubber bearing This causes the support to shift relative to the support member, resulting in instability.

[Purpose and structure of the invention]

The object of the present invention is to provide a method for installing a rubber bearing for structural support that prevents shear deformation from sliding, which can advantageously solve the above-mentioned problem. A metal support member 1 having a surface and a stopper is fixed to the upper part of the lower structure 2, and a metal movable support plate 3 is fixed to the upper part of the lower structure 2.
The sliding plate 4 fixed to the lower surface is placed on the sliding surface of the support member 1, and the lower part of the rubber bearing 5 is fitted into the recess 6 provided in the upper part of the movable support plate 3. Both ends of the shear deformation prevention member 7 in contact with both sides of the upper structure in the longitudinal direction are connected via a connecting member 8 to constitute a rubber bearing shear deformation prevention holding frame 9, and the upper part of the rubber bearing 5 is When the upper structure 10 is erected, the upper structure 10 moves relative to the lower structure 2, causing the rubber support 5 and the movable support plate 3, which are prevented from shearing deformation by the presser frame 9, to slide. and then press the presser frame 9.
Shear deformation prevention slippage of a rubber bearing for supporting a structure, characterized in that the movable support plate 3 is locked to a stopper of the support member 1 via a spacer so as not to move in the longitudinal direction of the superstructure. It's in the installation method.

〔Example〕

Next, the present invention will be explained in detail using illustrated examples.

1 to 7 show a first embodiment of the present invention. First, as shown in FIGS. 1 to 5, a large number of The anchor member 11 is fixed by welding, and a stopper 12 is integrally provided at the upper part of both sides of the support member 1 in the width direction of the upper structure in the longitudinal direction of the upper structure. A stainless steel plate 13 is fixed by adhesive or welding, and the upper surface of the stainless steel plate 13 forms a sliding surface, and the anchor member 11 and the support member 1 are embedded in the upper part of a substructure 2 such as a reinforced concrete abutment or pier. Fixed.

A sliding plate 4 made of tetrafluoroethylene is fixed to the lower surface of the movable support plate 3 made of a metal plate such as a steel plate with an adhesive or the like, and a recess 6 for fitting a rubber bearing is provided on the upper surface of the movable support plate 3. Furthermore, on both sides of the movable support plate 3 in the width direction of the upper structure, a pair of protrusions 14 are integrally provided at intervals in the longitudinal direction of the upper structure. At the same time, a stopper 12 is arranged approximately in the center between the pair of protrusions 14, and between the stopper 12 and each protrusion 14,
Spaces of approximately equal length are provided.

The lower part of the rubber bearing 5 is fitted into the recess 6 in the upper part of the movable support plate 3, and on both sides of the rubber bearing 5 in the longitudinal direction of the upper structure are vertical plates of a steel shear deformation prevention member 7 having an L-shaped cross section. Further, both ends of each shear deformation prevention member 7 are connected by a connecting member 8 made of a bolt, and the vertical surface of each shear deformation prevention member 7 is connected to both sides of the rubber support 5 by the connecting member 8. The rubber bearing shear deformation prevention presser frame 9 is constituted by the respective shear deformation prevention members 7 and the respective connection members 8 which are tightened and fixed.

A downward opening recess 1 into which the upper end of the rubber bearing 5 is fitted
On the upper part of the steel upper engagement member 16 comprising 5,
A large number of anchor members 17 are fixed by welding,
Further, a downward opening recess 15 of the upper engaging member 16 is fitted into the upper end of the rubber support 5 .

Next, a superstructure 10 such as a continuous bridge girder made of reinforced concrete or prestressed concrete is constructed on top of the upper engaging member 16, and during the construction of the superstructure 10, the superstructure When the supported portion of the object 10 moves relative to the lower structure 2, the shear deformation prevention member 7 in the presser frame 9 prevents the rubber layer of the rubber bearing 5 from being sheared, and the sliding plate 4 is moved. The movable support plate 3, the rubber bearing 5, and the upper engagement member 16 are connected to the upper structure 10.
It slides and moves on the stainless steel plate 13 as one body.

After the sliding movement during construction of the upper structure 10 is completed, the presser frame 9 is removed from the rubber bearing, and then, as shown in FIGS. 6 and 7, each of the groove-shaped spacers 18 The arm is inserted into the space between the stopper 12 and each protrusion 14, and the bolt 19 inserted through the spacer 18 is screwed into a female threaded hole provided in the stopper 12.
The spacer 18 is moved to the stopper 1 by the bolt 19.
It is fixed at 2.

In this way, the movable support plate 3 is held by the stoppers 12 on both sides of the support member 1 via the spacer 18 so as not to move in the longitudinal direction of the upper structure, and the movable support plate 3 is held in the upper part by the stoppers 12 on both sides. The lower part of the rubber bearing 5 is held so as not to move in the width direction of the structure, and since the lower part of the rubber bearing 5 is fitted into the recess 6 of the movable support plate 3, the lower part of the rubber bearing 5 is held so as not to move in the horizontal direction. . Further, when the upper structure 10 expands or contracts due to a change in temperature after the upper structure 10 is constructed, the rubber layer of the rubber support 5 is sheared and deformed.

FIGS. 8 to 13 show a second embodiment of the present invention. First, as shown in FIGS. 8 to 11, stoppers 20 and 21 are provided at both ends of the upper structure in the longitudinal direction. A number of anchor members 1 are attached to the bottom of a steel or other metal support member 1.
1 is fixed by welding, and guide/support ridges 2 extend in the longitudinal direction of the upper structure on both sides of the support member 1 in the width direction of the upper structure.
2 are integrally provided, and a stainless steel plate 13 is fixed to the upper surface of the support member 1 by adhesive or welding, and the upper surface of the stainless steel plate 13 forms a sliding surface. , is embedded and fixed in the upper part of a substructure 2 such as a reinforced concrete bridge abutment or bridge pier.

A sliding plate 4 made of tetrafluoroethylene is fixed to the lower surface of the movable support plate 3 made of a metal plate such as a steel plate with an adhesive or the like, and a recess 6 for fitting a rubber bearing is provided on the upper surface of the movable support plate 3. , Furthermore, on both sides of the upper structure in the longitudinal direction of the movable support plate 3,
A slope 23 is provided that slopes from one end in the width direction of the upper structure to the other end so as to be deviated in the longitudinal direction of the upper structure. The sliding plate 4 on the lower surface of the movable support plate 3 is placed on a stainless steel plate 13,
Moreover, a space of approximately the same size is provided between each stopper 20, 21 and each slope 23.

The lower part of the rubber bearing 5 is fitted into the recess 6 in the upper part of the movable support plate 3, and on both sides of the rubber bearing 5 in the longitudinal direction of the upper structure are vertical plates of a steel shear deformation prevention member 7 having an L-shaped cross section. furthermore, both ends of each shear deformation prevention member 7 are connected by a steel connecting member 8 having a tightening bolt 24, and the vertical surface of each shear deformation prevention member 7 is made of rubber by the tightening bolt 24. The rubber bearing shear deformation prevention presser frame 9 is configured by the shear deformation prevention member 7 and each connecting member 8, which is tightened and fixed to both sides of the support 5.

Next, a superstructure 10 such as a continuous bridge girder made of reinforced concrete or prestressed concrete is constructed on top of the rubber bearing 5.
During construction, if the supported part of the upper structure 10 moves relative to the lower structure 2 due to drying shrinkage, creep, or other causes,
While the shear deformation prevention member 7 in the presser frame 9 prevents shear deformation of the rubber layer of the rubber bearing 5, the movable support plate 3 with the sliding plate 4 and the rubber bearing 5
moves smoothly over the stainless steel plate 13 integrally with the upper structure 10.

After the sliding movement during the construction of the upper structure 10 is completed, the presser frame 9 is removed from the rubber support, and then movable with each stopper 20, 21 as shown in FIGS. 12 and 13. Spacers 25 and 26 made of wedge plates made of steel or other metal are inserted between the support plate 3 and each slope 23 from the width direction of the upper structure, and then the spacers 2
Bolts 28 inserted into the elongated holes 27 of 5 and 26 are screwed into female threaded holes 29 of the support member 1, and the spacers 25 and 26 are fixed to the support member 1 by the bolts 28.

In this way, the movable support plate 3 is held so as not to move in the horizontal direction by the guide/support ridges 22 on both sides of the support member 1 in the width direction of the upper structure and the spacers 25 and 26, and the rubber support Since the lower part of the rubber support 5 is fitted into the recess 6 of the movable support plate 3, the lower part of the rubber support 5 is held so as not to move in the horizontal direction. Further, when the upper structure 2 expands or contracts due to temperature changes after the upper structure is constructed, the rubber layer of the rubber support 5 is sheared and deformed.

In the case of the second embodiment, the spacer 2 made of a wedge plate
Since spacers 5 and 26 are used, spacers 25 and 2 are used.
6, the stoppers 20, 21, and the movable support plate 3 so that no gaps are formed between the spacers 25, 26.
can be easily installed.

In the case of the second embodiment, bolts inserted into the through holes of the stoppers 20 and 21 are screwed into female threaded holes provided in the spacers 25 and 26, and the bolts are used to hold the spacers 2 and 2.
5 and 26 may be fixed to the stoppers 20 and 21.

In the case of the second embodiment, since the frictional resistance between the rubber layer of the rubber bearing 5 and concrete is extremely large, the rubber layer of the rubber bearing 5 is There is no relative displacement between the upper structure 10 and the upper structure 10. However, also in the case of the second embodiment, the upper part of the rubber bearing 5 and the upper structure 1
0 may be provided with the upper engaging member 16 with the anchor member 17 shown in the first embodiment.

When carrying out this invention, a synthetic resin plate made of tetrafluoroethylene or the like may be used instead of the stainless steel plate 13, and this may be fixed to the support member 1 with an adhesive. Furthermore, the stainless steel plate 13 may be omitted and the support member 1 may be made of stainless steel.

A reinforcing material such as a steel plate may be embedded and fixed in the rubber layer of the rubber bearing 5, or in the case of the first embodiment, the rubber bearing may be constructed by fixing metal plates to both the upper and lower surfaces of the rubber layer. Furthermore, in the case of the second embodiment, a metal plate may be fixed to the lower surface of the rubber layer to constitute a rubber support.

〔Effect of the invention〕

According to this invention, a metal support member 1 having a sliding surface and a stopper on its upper part is fixed to the upper part of a lower structure 2, and a sliding plate 4 fixed to the lower surface of a metal movable support plate 3 is fixed to the upper part of a lower structure 2. It is placed on the sliding surface of the support member 1, and the lower part of the rubber support 5 is fitted into the recess 6 provided in the upper part of the movable support plate 3, and comes into contact with both sides of the upper structure in the longitudinal direction of the rubber support 5. Both ends of the shear deformation prevention member 7 are connected via the connecting member 8 to form the rubber bearing shear deformation prevention presser frame 9. Therefore, when constructing the upper structure 10, the upper structure 10 Even if the supported part of the rubber bearing 5 moves relative to the lower structure 2, the rubber layer in the rubber bearing 5 can be prevented from being sheared and deformed. The rubber bearing shear deformation prevention presser frame 9 is removed, and the movable support plate 3, which fits and holds the lower part of the rubber bearing 5, is attached to the support member via a spacer so as not to move in the longitudinal direction of the upper structure. 1, the lower part of the rubber bearing 5 can be firmly stabilized in a fixed position, and can tolerate shear deformation of the rubber bearing 5 when the upper structure 10 expands and contracts due to temperature changes. Since the lower part of the rubber bearing 5 is removably fitted into the recess 6 of the movable support plate 3, if the rubber bearing 5 becomes aged or damaged, only the rubber bearing 5 can be replaced.
Furthermore, since the movable support plate 3 and the rubber bearing 5 can be manufactured separately, advantages such as easy manufacturing can be obtained.

[Brief explanation of drawings]

1 to 7 show a first embodiment of the present invention, in which FIG. 1 is a longitudinal side view showing a state in which construction preparations for the superstructure have been completed, and FIG. 2 is a longitudinal side view thereof. Fig. 3 is a plan view, Fig. 4 is a longitudinal side view showing an enlarged part of Fig.
The figure is a plan view showing the state in which the movable support plate is placed on the support member, Figure 6 is a longitudinal side view showing the state in which the rubber bearing has been installed, and Figure 7 is a cross-sectional view taken along line A-A in Figure 6. It is. 8 to 13 show a second embodiment of the present invention, in which FIG. 8 is a vertical side view showing a state in which preparations for construction of the superstructure have been completed, and FIG. 9 is a plan view thereof. , FIG. 10 is a sectional view taken along line B-B in FIG. 9, FIG. 11 is a sectional view taken along line C-C in FIG. Figure 13 is D in Figure 12.
-D line sectional view. In the figure, 1 is a metal support member, 2 is a lower structure, 3 is a metal movable support plate, 4 is a sliding plate, 5 is a rubber support, 6 is a recess, 7 is a shear deformation prevention member,
8 is a connecting member, 9 is a rubber support holding frame for preventing shear deformation, 10 is an upper structure, 11 is an anchor member,
12 is a stopper, 13 is a stainless steel plate, 14 is a protrusion, 15 is a downward opening recess, 16 is a steel upper engagement member, 17 is an anchor member, 18 is a spacer, 19 is a bolt, 20 and 21 are stoppers,
22 is a guide and support protrusion, 24 is a tightening bolt, 2
5 and 26 are spacers, and 28 is a bolt.

Claims (1)

[Claims] 1. A metal support member 1 equipped with a sliding surface and a stopper on the upper part is fixed to the upper part of the lower structure 2, and a sliding plate 4 fixed to the lower surface of the metal movable support plate 3 is used to prevent the support member 1 from sliding. A shear deformation prevention member placed on a surface, the lower part of the rubber bearing 5 fitting into the recess 6 provided in the upper part of the movable support plate 3, and abutting against both longitudinal sides of the upper structure in the rubber bearing 5. 7 are connected via a connecting member 8,
A holding frame 9 for preventing rubber bearing shear deformation is configured, and when the upper structure 10 is constructed on the rubber bearing 5, movement of the upper structure 10 with respect to the lower structure 2 causes shearing by the holding frame 9. The rubber bearing 5, which is prevented from being deformed, and the movable support plate 3 are slid and moved, and then the presser frame 9 is removed, and the movable support plate 3 is placed with a spacer in between so as not to move in the longitudinal direction of the upper structure. A method for installing a rubber bearing for supporting a structure by preventing slippage from shearing deformation, the method comprising: locking the rubber bearing to a stopper of a bearing member 1;