KR101949248B1 - Elastomeric bearing that be attached presetting module - Google Patents

Abstract

The present invention relates to an elastic bearing on which a presetting apparatus is attached. In particular, an elastic bearing is installed between a lower column structure (a bridge) and an upper structure (an upper plane). Therefore, the elastic bearing supports an upper plane of a bridge in order to smoothly adapt to movement, rotation, and deflection thereof at ordinary times, whereas in case of an earthquake, divides a load in a uniform manner so as to protect upper and lower structures. In addition, a presetting apparatus consisting of a deformation maintenance hole and a hydraulic jack front end deformation unit is attached to a wedge part of the elastic bearing at both side surfaces thereof. Consequently, this invention is characterized by preventing in advance an erroneous motion of the elastic bearing after construction of the bridge, by being provided with the presetting apparatus which adjusts in advance an amount of motion which is calculated by applying upon the elastic bearing the distance deducted from the factors such as a creep allowing the upper structure to horizontally move, drying shrinkage, and the average temperature of an area of installation.

Description

[0001] The present invention relates to an elastomeric bearing with a pre-

The present invention is characterized in that when a pre-setting device composed of an elastic support provided between a lower structure (pier) and a superstructure (upper plate) and a hydraulic jack front end deformation portion using a deformation maintaining port and a hydraulic jack is fastened to both sides of the elastic support, It is designed to adapt the movement, rotation and deflection behavior smoothly, to protect the upper and lower structures by sharing the horizontal load evenly during the earthquake, There is provided an apparatus for correcting a movement amount calculated by creep, drying shrinkage, and temperature correction generated after installation of an upper structure on an elastic support having a presetting device capable of preventing an abnormal behavior of an elastic support after a bridge is dried will be.

In general, when bridges are installed, the bridge absorbs the relative displacement due to seasonal temperature changes, wind, and earthquake, etc., or the horizontal force of the top plate to smooth the seismic function of the bridge and extend the durability. The upper structure is a structure made long in the traveling direction (longitudinal direction) of the vehicle, and the upper beam is constructed by arranging several pieces in the lateral direction on the bridge pier constructed to support the upper structure on the ground.

At this time, a bridge support is installed between the upper beam and the bridge to support the movement caused by the warping and the temperature change issued by the upper structure due to the passage of the vehicle.

In addition, the bridge support protects the structure by resisting the earthquake horizontal force generated between the superstructure and the substructure when the earthquake occurs.

Such bridge supports can be divided into steel series and rubber series, and rubber series bridge supports can be classified as elastic support, lead-free support, and high-damping rubber support.

The double elastic bearing is a bridge bearing mainly used for concrete bridge such as PSC beam bridge, which is made by laminating rubber and steel plate in order and vulcanizing at high pressure.

Due to the constant behavior of the elastic support made in this way, the rubber layer undergoes shear deformation of 70% of the net rubber height and shear deformation of 150% of the net rubber height due to the behavior during the earthquake.

Generally, a concrete bridge such as PSC beam bridge is manufactured to a length of 25m to 50m. The length of the upper beam is reduced by the creep and drying shrinkage of concrete as time passes.

Also, in summer and winter, the temperature changes and the kidneys and contractions are repeated.

Therefore, the elastic bearing installed on the bridge at first is installed in a state without deformation, and deforms into a parallelogram shape from a rectangle shape by shearing deformation as much as the upper beam is reduced by concrete creep and drying shrinkage after mounting the upper beam.

This creep and dry shrinkage will no longer shrink after about two years and will stop the deformation.

From this point on, the elastic support deforms by the movement of the upper beam repeatedly stretching and shrinking only by the temperature. The amount of deformation due to creep and dry shrinkage is not restored to the fixed position but remains as a permanent deformation.

Due to the deformation value of the elastic support left by this permanent deformation, the amount of movement of the elastic support which must be moved by the constant temperature exceeds 70% of the net rubber height, and the continuous eccentric load is applied to the elastic support.

When the permanent deformation of the elastic support is calculated and the shear deformation is made in the opposite direction in advance, the upper beam concrete creep and the elastic support after the completion of the drying shrinkage, You will find stability.

It is called presetting that the amount of permanent deformation is calculated in advance and moved in the opposite direction before the upper beam of the elastic support is mounted, and the preset amount is calculated by the following calculation.

In general, the movable support is installed so that the center of the support body is aligned with the central standard temperature of the calculation of the amount of movement shown in the design plan, the live load free state, and the completion of creep and shrinkage of concrete.

는 다음 식으로 계산한다.Also, in-situ PSC bridges should also consider elastic deformation due to prestress. Therefore, it is necessary to perform the presetting considering the field situation when installing the elastic bearing, and the total preset amount

Is calculated by the following formula.

: 가동받침 본체의 상·하 중심의 불일치량(프리셋팅 필요량)here,

: The amount of discrepancy between the top and bottom center of the movable body (preset setting)

: 받침설치시 온도(t_s ℃)와 교량설계시 고려하는 연평균 온도(t_m ℃)의 차이에 의한 이동량

: Movement due to the difference between the installation temperature (t _s ° C) and the annual average temperature (t _m ° C) considered in designing the bridge

: 콘크리트의 건조수축에 의한 이동량

: Movement due to drying shrinkage of concrete

: 콘크리트의 크리프에 의한 이동량

: Movement due to creep of concrete

: 프리스트레스 힘에 의한 콘크리트의 탄성변형 이동량

: Elastic deformation movement of concrete by prestress force

: 받침설치 완료 후 작용하는 고정하중(사하중)에 의한 이동량

: The amount of movement due to the fixed load (dead load)

The figure below shows the center distance lm between the movable base and the fixed base before the expansion and the center distance l between the movable base and the fixed base after the expansion.

The center distance between the movable base and the fixed base before and after expansion and contraction l _m and l

l _m : Center distance between the movable base lower body and the fixed base lower body on the pier (alternating)

   l: Distance between the movable base of the upper body and the upper base of the fixed base for the stretched girder

On the other hand, in pre-setting the conventional elastic support, after the upper beam is creeped and dried and shrunk, the upper beam of the bridge is pulled up, and the elastic restoring force of the elastic support acts to maintain the impression until the elastically deformed elastic support is restored When the posterior elastic restoration is restored to its original position, a method of lowering the bridge upper beam is used.

However, this method can cause cracks and cracks in the upper structure in the process of reversing the bridge which transfers the load to the lower portion due to its own weight, and there is a burden to put more budget and manpower.

In addition, since the upper plate of the elastic support already welded to the upper structure is released by the grinder or gouging, and the elastic support is returned to the original position and re-welding is performed, the elastic support rubber may be deformed by the welding heat.

In addition, even if the upper load of the deformed elastic support is removed, the setting must be completed in a state in which 100% of the elastic support is not restored and some residual deformation remains.

Thus, the conventional technique has a disadvantage in that it is impossible to obtain the setting value as much as desired and the damage of the structure and the great cost for the presetting of the elastic support.

Korean Patent Application No. 10 - 2008 - 0108736 "Elastic bearing for bridges"

In order to solve the above-mentioned problems, the present invention prevents cracks and cracks from occurring in the upper structure in the process of reversing the bridge which transfers the load to the lower part by its own weight, .

It is also intended to prevent deformation of the elastic support rubber pads during deformation and to prevent damage to the structure and to set a desired value for the presetting of the elastic support.

According to an aspect of the present invention, there is provided a lower plate having a pair of lower wedges protruded upward to be positioned on a front surface and a rear surface, An elastic support consisting of a lower plate laminated with a wedge protruding thereon; and

The presetting device attached to the elastic support is formed in the shape of a hook on the upper surface of the lower plate, a first insertion groove is formed on the inner side along the longitudinal direction on one side, and a side of the lower wedge is formed on one side of the first insertion groove A hydraulic jack base having a fixed protrusion interfering with and a vertical partition wall having a hydraulic jack bracket attached to the other end; Wow

The hydraulic jack base is mounted on the upper surface of the lower plate, and one side of the lower wedge is inserted into the first insertion groove, and then the fixing protrusions of the hydraulic jack base are coupled to the upper and lower wedges, A cylinder rod of the hydraulic jack interferes with one side of the wedge, and a hydraulic jack front end deformation portion pressing the other side of the upper wedge; Wow

Wherein the hydraulic jack base has a hook-shaped upper portion formed at one side thereof with a second insertion groove formed at an inner side along the longitudinal direction thereof, a fixing protrusion formed at one end of the second insertion groove, and a screw hole formed at the other end thereof; Wow

And one side of the lower wedge is inserted into the second insertion groove so that the pressing protrusion interferes with one side of the upper wedge and the other side of the upper wedge is pressed by the pressing bolt, The elastic restraining portion being formed with a deformed retaining portion for retaining the elastic member.

As described above, the elastic support having the presetting device according to the present invention is advantageous in that it is possible to reduce the additional construction cost due to the existing elastic support pre-setting and to secure the stability of the upper structure, The upper beam of the upper beam is calculated by calculating the permanent deformation caused by the creep and shrinkage of the concrete, and by installing the elastic beam in the opposite direction by shear deformation in advance, the elastic beam is positioned in the correct position even after the upper beam concrete creep and drying shrinkage are completed. It is possible to find out the smooth movement and stability of the elastic support when constantly moving.

1 is an exploded perspective view showing a modified retainer and a hydraulic jack for use in the elastic support of the present invention.
FIG. 2 is a perspective view showing a modified retainer and a hydraulic jack used in the elastic support of the present invention. FIG.
FIG. 3 is a perspective view showing a state in which a deformed holder used in an elastic support of the present invention is coupled to a hydraulic jack. FIG.
Figure 4a is a perspective view of the non-
4B is a perspective view of a horizontally-
5 is a perspective view showing a state in which a deformed retainer is assembled to a horizontally moved elastic support according to the present invention.
6 is a perspective view showing a state in which a hydraulic jack is coupled to an elastic bearing of the present invention.
7 is an exploded perspective view showing another embodiment of the elastic support of the present invention.
8 is an exploded perspective view showing the horizontally moved elastic support of FIG. 7;
Fig. 9 is a side view showing the elastic support of Fig. 7; Fig.

In order to achieve the above objects and effects, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view showing a modified retainer and a hydraulic jack used in the elastic support of the present invention, FIG. 2 is a perspective view showing a modified retainer and a hydraulic jack used in the elastic support of the present invention, Fig. 6 is a perspective view showing a state in which a deformed retaining hole used in an elastic support of the invention is coupled to a hydraulic jack; Fig.

The presetting device attached to the elastic support 100 is composed of a deformed holding tool 130 and a hydraulic jack shear deformation part 190. [

The hydraulic jack front end deformation portion 190 is formed in a hook shape on the upper surface of the lower plate 120 and has a first insertion groove 340 formed inwardly along the longitudinal direction on one surface thereof, And a hydraulic jack base 210 integrally formed with a fixing protrusion 330 for interfering with one side of the lower wedge 280 and a vertical partition 220 having a hydraulic jack bracket 250 attached to the other end thereof.

The hydraulic jack base 210 is mounted on the upper surface of the lower plate 120 and then one side of the lower wedge 280 is inserted into the first insertion The fixing protrusions 330 of the hydraulic jack base 210 interfere with one side of the lower wedge 280 so as to shear deformation between the lower wedge 280 and the upper wedge 270, The cylinder rod of the upper cylinder 200 presses the other side of the upper wedge 270.

The deformed holder 130 is located at the upper portion of the hydraulic jack base 210. The deformed holder 130 is formed with a second insertion groove 340 'inwardly along the longitudinal direction on one surface thereof in the form of a hook, And a deformed support stand 140 having a fixing protrusion 330 'at one end of the groove 340' and a screw hole 160 at the other end thereof.

One side of the lower wedge 280 is inserted into the second insertion groove 340 'and inserted into the screw hole 160 of the deformation-holding support bracket 140, 330 'interfere with one side of the upper wedge 270 and press the other side of the upper wedge 270 by tightening the pressing bolt 170.

An extension rod 240 is positioned between the upper wedge 270 and the hydraulic jack 200 and presses the upper wedge 270 by the pressure of the hydraulic jack cylinder rod 360.

An elongated hole 260 is formed in the lower wedge 280 so as to penetrate the front surface and the rear surface of the lower wedge 280. An elongated hole 260 is formed in the elongated hole 260, (180) is inserted and prevented from floating.

FIG. 4A is a perspective view of the elastic support not moving, and FIG. 4B is a perspective view of the elastic support which is horizontally moved. The elastic support 100 is composed of the upper plate 110 and the lower plate 120, A lower plate 120 having a pair of lower wedges 280 formed thereon and an upper wedge 270 protruding downward to be positioned between the lower wedges 280 at an upper portion of the lower plate 120, Plate 110 and assembled.

FIG. 5 is a perspective view showing a state in which a deformed retainer is assembled to a horizontally-moved elastic support according to the present invention. FIG.

The elastic support 100 is formed by laminating the upper plate 110 on the lower plate 120 and then stacking the upper wedge 270 such that the upper wedge 270 is positioned on the inner peripheral surface of the lower wedge 280.

In the elastic support 100, the deformation maintaining port 130 is positioned on the outer circumferential surface of the lower wedge 280 of the pre-setting device 320.

When the second insertion groove 340 formed on one surface of the deformation-holding support base 140 is inserted into the deformation maintaining port 130 in close contact with the front surface of the lower wedge 280, the pressing protrusion 150 presses the lower wedge 280 When the pressing bolt 170 is inserted into the screw hole 160 for fixing the deformation supporting stand 140 to the lower wedge 280 in the state of interfering with the left side surface, The right side surface of the wedge 270 is pressed to fix the upper wedge 270 and the lower wedge 280 so as not to move until the hydraulic jack front end deformation portion 190 is installed.

That is, when the press bolt 170 is inserted into the screw hole 160 and then tightened, the press protrusion 150 of the press protrusion 150 pulls the lower wedge 280 in the direction of the screw hole 160 and presses the press bolt 170 Pushes the upper wedge 270 in the direction of the pressing projection 150 and fixes it,

A hydraulic jack front end deformation portion 190 is located below the deformation maintaining port 130.

The hydraulic jack front end deformation portion 190 is inserted into the first insertion groove 340 formed on one surface of the hydraulic jack base 210 such that the outer surface of the lower wedge 280 is closely fitted, The hydraulic jack 200 installed on the hydraulic jack fixing bracket 250 in the state where the lower wedge 280 is engaged can directly push the right side surface of the lower wedge 280 by pulling out the hydraulic jack cylinder rod 360, The upper wedge 270 can be pressed by inserting the extension rod 240 between the hydraulic jack cylinder rod 360 and the upper wedge 270. [

An extension rod 240 is used to extend the length of the hydraulic jack cylinder rod 360 of the hydraulic jack 200 so that the length thereof is short.

Then, the hydraulic jack 200 presses the right side surface of the upper wedge 270, and the pushing protrusion 330 pushes the lower wedge 280 toward the hydraulic jack 200 and remains fixed.

Accordingly, the hydraulic jack shear deformation portion 190 and the deformation support port 130 are installed and supported on the front surface and the rear surface of the elastic support 100 in the above-described manner.

The hydraulic jack base 210 supporting the hydraulic jack 200 mounted for the purpose of shear deformation between the lower wedge 280 and the upper wedge 270 is formed in the elastic support 100 with the pre- The deformation is maintained by tightening the press bolt 170 which maintains the deformation value between the upper wedge 270 and the lower wedge 280 in order to maintain the shear deformed movement amount after the shearing deformation until the elastic support 100 is installed.

At this time, the hydraulic jack base 210 supported on the lower wedge 280 pulls the lower wedge 280 through the hydraulic jack 200 and presses the upper wedge 270 to apply pressure between the hydraulic jacks 200, The elastic pad is deformed by separating the attached upper wedge 270 and the lower wedge 280 attached to the lower plate.

In this case, when a desired shear deformation is generated in the elastic pad, the strain relief sill 130 is inserted into the elongated hole 260 of the lower wedge 280 to prevent lifting of the elastic pad by deformation, The elastic bolt 170 is inserted into the screw hole 160 and then the upper wedge 270 is brought into contact with the pressing bolt 170 or the extension rod 240 so as to be pressed and fixed, And the hydraulic jack shear deformation unit 190 is separated and removed from the elastic support 100 in which the deformation maintaining port 130 is fixed due to the deformation maintaining port 130. [

Thereafter, the elastic support 100 with the strain relief port is removed after the field bridge is dried and cured.

FIG. 7 is an exploded perspective view showing another embodiment of the elastic support of the present invention, FIG. 8 is an assembled perspective view showing the elastic support of FIG. 7 horizontally moved, and FIG. Side view.

The elastic support 100 according to the present invention can calculate the deformation value and then fix the fastening holes 350 and 350 'to the lower wedge 280 of the lower plate 120 and the upper wedge 270 of the upper plate 110 at the factory And then directly installed on the site.

  The lower plate 120 of the elastic support 100 includes a pair of lower wedges 280 protruding upward in a state where the lower plate 120 is positioned on the front and back surfaces, And a plurality of fastening holes 350 penetrating through the front surface of the lower wedge 280 to the back surface so as to intersect the mounting groove 310.

The upper plate 110 located on the lower plate 120 includes a top wedge 270 protruding downward from the bottom and a fastening hole 350 formed on the bottom wedge 280 on the upper wedge 270, And a fastening hole 350 'is formed at a corresponding position.

The upper plate 110 is stacked on the lower plate 120 and then the upper wedge 270 is inserted into the fastening hole 350 of the lower wedge 280. Then, The fastening bolt 290 is inserted into the fastening hole 350 'of the upper wedge 270 and the fastening nut 300 is fastened to the end protruding in the other direction.

100: elastic bearing 110: upper plate
120: Lower plate 130:
140: deformation supporting stand 150: pressing projection
160: screw hole 170: pressure bolt
180: Injury prevention pin 190: Hydraulic jack shear deformation part
200: Hydraulic jack 210: Hydraulic jack base
220: Vertical partition 240: Extension rod
250: Hydraulic jack fixing bracket 260: Long hole
270: upper wedge 280: lower wedge
290: fastening bolt 300: fastening nut
310: Assembly groove 320: Presetting device
330: fixing projections 340, 340 ': first and second insertion grooves
350, 350 ': fastening ball 360: hydraulic jack cylinder rod

Claims (4)

A lower plate having a pair of lower wedges protruding upward in a front direction and a rear plate in an upper direction and a lower plate having upper wedges protruded in a lower direction so as to be positioned between the lower wedges at an upper portion of the lower plate, An elastic support having a pre-setting device attached to a lower wedge,
The presetting device 320 attached to the elastic support 100 includes a first insertion groove 340 formed on the upper surface of the lower plate 120 in the shape of a hook, The hydraulic jack base 210 having the hydraulic jack bracket 250 attached thereto is integrally formed at one end of the one insertion groove 340 with a fixing protrusion 330 interfering with one side of the lower wedge 280, )Wow,
The hydraulic jack 200 is installed on the hydraulic jack bracket 250 and then the hydraulic jack base 210 is mounted on the upper surface of the lower plate 120. One side of the lower wedge 280 is inserted into the first insertion groove 340, The fixing protrusions 330 of the hydraulic jack base 210 interfere with one side of the lower wedge 280 to cause shear deformation between the wedge 280 and the upper wedge 270 and the cylinder rod of the hydraulic jack 200 is connected to the upper wedge A hydraulic jack front end deformation portion 190 for pressing the other side of the hydraulic jack 270; Wow
A second insertion groove 340 'is formed in the upper part of the hydraulic jack base 210 in the shape of a hook inwardly along the longitudinal direction on one side of the hydraulic jack base 210. At one end of the second insertion groove 340' A deformation sustaining support member 140 having a screw hole 330 'at one end and a screw hole 160 at the other end,
And one side of the lower wedge 280 is inserted into the second insertion groove 340 'and inserted into the screw hole 160 of the deformation-holding support bracket 140, Is configured to interfere with one surface of the upper wedge (270) and to press the other surface of the upper wedge (270) by tightening the pressing bolt (170) Resilient support.
The hydraulic excavator according to claim 1, wherein an extension rod (240) is positioned between the upper wedge (270) and the hydraulic jack (200) to press the upper wedge (270) Elastic bearing with setting device.
The apparatus of claim 1, wherein the lower wedge (280) is formed with an elongated hole (260) through which the front surface and the rear surface are inserted, and the elongated hole (260) And a protruding anti-float pin (180) is inserted into the elastic supporter.
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