JP2008075253A - Elastic hinge bearing device between beam ends - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elastic hinge bearing device installed between beam ends which has increased durability. <P>SOLUTION: In this hinge bearing device installed between beam ends which extends in the axial direction of a bridge, a female receiving fitting 3 extending toward one beam end 2 is fitted to the other beam end 1. A male insertion fitting 5 extending toward the other beam end 1 is fitted to the one beam end 2. To elastically transmit a load between the female receiving fitting 3 and the male insertion fitting 5, an elastic bearing is interposed between the female receiving fitting 3 and the male insertion fitting 5. A vertical preliminary compression force is applied to the elastic bearing 6 interposed between the female receiving fitting 3 and the male insertion fitting 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an elastic hinge support device between bridge girder ends for connecting a newly installed hinged ramen structure or an existing bridge.

  Conventionally, in a multi-span or multi-span bridge type, there is known a construction example in which a hinged ramen type is used depending on conditions such as economy and simplification of structural design.

  As shown in FIG. 16, this type of existing bridge structure is a unit in which the bridge girder 1 a is extended to the left and right of the upper part of the pier 40, and another unit that is extended from the opposite side at the center of the span. The bridge girder 2a is connected by a hinge support 41. (For example, refer to Patent Document 1).

As the above-mentioned hinge support, there is also known a construction example in which a vertical load is transmitted by frictional contact between steel members between beam ends.
JP-A-9-59928

When the vertical load is transmitted by engaging only the steel material between the end portions of the girders as the hinge support, the steel members are frictionally engaged with each other between the end portions of the girders, which may reduce durability. There was a problem that there was.
It is an object of the present invention to provide an elastic hinge support device between beam ends that can advantageously solve the above-described problems and can improve the durability of the hinge support.

In order to solve the above-mentioned problem advantageously, the elastic hinge support device between the beam ends of the first invention is a hinge support device between the beam ends projecting in the bridge axis direction, A female receiving bracket that extends toward the other girder end is provided, and a male insertion fitting that extends toward the one girder end is provided at the other girder end. An elastic bearing is interposed between the female receiving metal fitting and the male insertion metal fitting in order to elastically transmit a load between the male insertion metal fitting.
Further, according to the second invention, in the elastic hinge support device between the beam ends of the first invention, the elastic support interposed between the female receiving metal fitting and the male insertion metal fitting is preliminarily compressed in the vertical direction. It is characterized by power.
In the third invention, in the elastic hinge support device between the beam ends of the first or second invention, the support arm of the male insertion fitting is inserted and disposed in the female receiving fitting, and the upper surface of the support arm is arranged. The lower surface of the upper elastic support is slidably contacted with the lower surface of the support arm, and the upper surface of the lower elastic support is slidably contacted. It is characterized in that the position is held by a receiving metal fitting.

According to the first aspect of the present invention, in order to transmit a load elastically between the female receiving metal fitting and the male insertion metal fitting, an elastic bearing is interposed between the female receiving metal fitting and the male insertion metal fitting. Therefore, when a vertical load due to a wheel load (automobile load) acts on one girder end, it can be elastically buffered and the vertical load can be transmitted to the other girder end. Because it is an elastic hinge bearing that transmits vertical load, friction between metal plates does not occur and it is buffered and supported by an elastic body, so that excessive stress concentration does not act, so the durability of the elastic hinge bearing can be improved In addition, since no step is generated between the end portions of the girders, the running performance of the vehicle can be improved.
According to the second invention, since the vertical compression force is applied to the elastic bearing, even if a vehicle wheel load smaller than the preliminary compression force of the elastic bearing acts on the girder end, There is no step in the vertical direction between the parts, and the running performance of the vehicle can be improved.
According to the third aspect of the present invention, when a vertical load due to a wheel load is applied to the end of the girder on the male insertion bracket side, it is elastically buffered to the end of the girder on the side of the male insertion bracket via the lower elastic bearing. When a vertical load due to a ring load is applied to the end of the girder on the side of the female bracket, it can be transmitted to the end of the girder on the side of the male plug through the upper elastic bearing. The vertical load can be transmitted by elastically buffering.

    Next, the present invention will be described in detail based on the illustrated embodiment.

  1 to 4 show an elastic hinge support device between spar ends according to an embodiment of the present invention, which is made of steel projecting from one spar end 1 toward the other spar end 2. A female metal fitting 3 is provided, and a male male insertion metal fitting 5 having a support arm 4 projecting toward the one girder end 1 is provided at the other girder end 2. In order to elastically transmit a load between the receiving metal fitting 3 and the male insertion metal fitting 5, an elastic support 6 is interposed between the female receiving metal fitting 3 and the male insertion metal fitting 5.

  The structure of the female receiving metal fitting 3 will be described. In the illustrated embodiment, the anchor plate 16 and the bridge plate in the bridge axis direction (left and right direction) of the end cross beam 62 in the bridge axis direction, which is one of the beam ends, are respectively provided. The female side vertical steel plate 8 is arranged, and the end cross beam 62 is sandwiched between the anchor bolt 7 with a small-diameter male screw shaft portion and the nut attached thereto, which is arranged to be inserted into the end cross beam 62. The anchor plate 16 and the female side vertical steel plate 8 are fixed. More specifically, the anchor bolt 7 with a small-diameter male screw shaft is fixed to the anchor plate 16 fixed to one girder end 1 (in the case of illustration, the end cross girder 62 in the bridge axis direction or the main girder end not shown). Are connected, and the other end side of the anchor bolt 7 is connected to a female vertical steel plate 8 serving as a base fixed to the one girder end 1. The female vertical metal plate 8 is provided with a plurality of stepped through holes 8a, and is provided with an upper elastic support holding portion 9 and a lower elastic support holding portion 10 that project toward the other girder end 2. A plurality of female screw holes 11 a are provided at the base end portion of the main body 11, and are inserted into the stepped through holes 8 a of the female-side vertical steel plate 8, and by bolts 8 b screwed into the female screw holes of the female receiving metal main body 11. The female-type metal fitting body 11 is fixed to the female-side vertical steel plate 8, and the recesses 11b and 8c provided in the base end portion of the female-type metal fitting body 11 and the female-side vertical steel plate 8 are provided with these A short cylindrical steel shear key 12 is fitted over the recess, and the base end of the female bracket body 11 and the female side vertical steel plate 8 are integrated by the bolt 8b, or the bolt 8b. And shear key 12 are integrated to transmit vertical load It is.

  A horizontal upper elastic support holding portion 9 that projects toward the other girder end is integrally provided at the upper portion of the female receiving metal body 11 and the lower portion faces the other girder end. A horizontal lower elastic support holding part 10 that protrudes from the upper elastic support holding part 9 is provided in one piece in parallel with the upper elastic support holding part 9.

The upper elastic bearing 6 is not directly attached to the upper elastic bearing holding part 9 with bolts, but the upper elastic bearing 6 is disposed via a pre-compression plate 13. And the position in the front-rear direction are configured to be held by a long bolt 14 or a short bolt 15 described later.
Further, the lower elastic support 6 is attached to the lower elastic support 6 with bolts so that the position of the lower elastic support 6 is held.

  The upper elastic bearing holder 9 is provided with a plurality of female screw holes 17 at intervals in the bridge axis direction (left-right direction) and at intervals in the front-rear direction. A long elongate bolt 14 (see FIG. 15) allows a precompression force to be introduced into the upper elastic support 6 via the precompression plate 13, and between the upper elastic support holding portion 9 and the precompression plate 13. The long bolt 14 is replaced with the short bolt 15 with the adjustment plate 18 interposed after the pre-compression, thereby preventing the attachment of the pre-compression plate 13 and the movement of the adjustment plate 18 in the bridge axis direction.

  An outer frame mounting female screw hole 19 (see FIG. 8) is provided at the center in the width direction of the upper elastic support holding portion 9 with a space in the front-rear direction, and a bolt to be screwed into the outer frame mounting female screw hole 19 20 (see FIG. 3), the outer frame 21 is assembled and arranged so that the side frame member 22 is positioned outside the bolt head provided on the side reinforcing vertical steel plate 51 (described later) at a slight interval. The upper part of the outer frame 21 is fixed to the upper elastic support holding part 9, and the side frame member 22 in the outer frame 21 prevents the adjustment plate 18 from coming out in the direction perpendicular to the bridge axis. Yes. Since the adjustment plate 18 is pressure-bonded to the upper elastic support holding portion 9 and the precompression plate 13, the adjustment plate 18 is held in position by friction, and there is almost no risk of slipping out in the direction perpendicular to the bridge axis.

  The lower elastic support holding part 10 is provided with a plurality of stepped through holes 23 (see FIG. 8) having an interval in the bridge axis direction and an interval in the front-rear direction and having a lower diameter on the lower surface side. Bolts 20 (see the lower part of FIG. 3), which are provided with outer frame mounting female screw holes 19 that open to the lower surface side between the stepped through holes 23 in the direction and spaced in the front-rear direction. ), The lower part of the outer frame 21 is attached to the lower elastic bearing holder 10.

  Bolts 25a (see FIG. 3) which are inserted into the stepped through holes 23 in the lower elastic support holding part 10 and screwed into the female screw holes 24a (see FIG. 9) of the mounting steel plate 24 in the lower elastic support 6 The elastic support 6 is fixed to the lower elastic support holding part 10.

  The female receiving bracket 3 is composed of a female receiving bracket body 11, a female side vertical steel plate 8, a pre-shear plate 13, an upper and lower elastic bearing 6, a short bolt 14, and the like.

  The outer frame 21 is made of an angle material or the like, and an upper frame member 25 having a rectangular end plate, each side frame member 22, and a lower frame member 26 are formed in a rectangular frame shape by bolts and nuts 27. The upper frame member 25 is disposed on the upper surface side of the upper elastic support holding portion 9, and the lower frame member 26 is disposed on the lower surface side of the lower elastic support holding portion 10 and fixed by bolts 20.

The side frame members 22 in the outer frame prevent the adjustment plate 18 from coming out in the direction perpendicular to the bridge axis. 1 to 4, as shown by a two-dot chain line, another piece 29 b of a plurality of temporary fixing brackets (angle members) 29, in which one piece 29 a side is detachably fixed to each side frame member 22 by bolts and nuts 28. Can be held in a state in which the female receiving bracket 3 and the male inserting bracket 5 are positioned by detachably fixing them to the side vertical plate 30 of the male inserting bracket 5 with bolts 31. This facilitates the transfer installation work of the entire device. The temporary fixing bracket 29 and the bolts / nuts 28 or bolts 31 fixing the temporary fixing bracket 29 are removed after the entire apparatus is embedded and fixed in one concrete girder end 1 and the other girder end 2. An elastic hinge support function by the support 6 is exhibited.
The one piece 29a is provided with a bolt insertion hole 29c, and the other piece 29b is provided with a bolt insertion long hole 29d so as to absorb errors and be easily mounted.

  In the case of the elastic hinge bearing, the elastic bearing 6 is preliminarily compressed in the vertical direction in advance so as to correspond to a live load that is assumed in design. Even if (wheel load) acts, it is possible to support the load sharing between the end portions of the girders while elastically buffering (supporting), and between the elastic support 6 and the support arm 4. Therefore, the extension girder 1a, 2a is allowed to expand and contract due to a temperature change.

  In the pre-compression, the pre-compression plate 13 and the elastic bearing 6 are attached to the female receiving bracket 3, and the support arm 4 of the male insertion fitting 5 is inserted between the upper and lower elastic bearings 6 of the female receiving bracket 3. In this state, the preliminary compression plate 13 is pressed by the long bolt 14, and after the adjustment plate 18 is interposed, the short bolt 15 is replaced. By replacing with the short bolt 15, the preliminary compression plate 13 is not pressed, and the adjustment plate 18 is prevented from shifting in the bridge axis direction. The width dimension of the adjustment plate 18 in the bridge axis direction is slightly narrower than the width dimension between the short bolts 15 spaced in the bridge axis direction.

  Furthermore, the relationship with the main components used in the elastic hinge support apparatus between the girder ends of the present invention will be described.

  FIG. 7 shows the preliminary compression plate 13, which has a plurality of preliminary compression bolts (long bolts 14) or positioning bolts (positioning bolts) at both ends in the bridge axis direction on the upper surface and spaced in the front-rear direction. Short bolt 14) A recess 32 for engaging the shaft portion is provided, and a plurality of stepped through holes 33 are provided between the recess rows in the bridge axis direction, spaced apart in the bridge axis direction and spaced in the front-rear direction. Is provided. The stepped through-hole 33 is a through-hole for attaching the elastic support 6 with bolts 34 (see FIG. 3), and the pre-compression plate 13 with the elastic support 6 attached is the upper elastic support holding part 9. In the state of being arranged on the lower side, the short bolt 15 (or the long bolt 14) is used for positioning.

  The upper elastic bearing 6 and the lower elastic bearing 6 have a structure as shown in FIG. 9, and elastic layers 35 such as rubber and pressure-proof reinforcing steel plates 36 are alternately laminated, and one end in the vertical direction. The steel plate 24 for attachment is integrally formed on the side and the steel plate 37 for fixing the sliding plate is integrally vulcanized and molded on the other end. A Teflon (registered trademark) (tetrafluoroethylene) plate is fixed as the sliding plate 38. ing. The sliding plate 38 abuts on a sliding support plate 39 such as a stainless steel plate fixed to the support arm 4 in the male insertion fitting 5 to enable sliding movement in the bridge axis direction.

  Next, the structure of the male male fitting 5 made of steel will be described with reference to FIGS. 1 to 4 and FIG. 5. In the illustrated embodiment, the end portion in the bridge axis direction serving as the other girder end portion. Anchors with small-diameter male screw shafts arranged so that the anchor plates 16 and the male side longitudinal steel plates 42 are respectively inserted on both sides of the cross beam 62 in the bridge axis direction (left and right direction). The anchor plate 16 and the male vertical steel plate 42 are fixed so that the end cross beam 62 is sandwiched between the bolts 7 and nuts attached thereto. More specifically, an anchor with a small-diameter male screw shaft portion is fixed to the anchor plate 16 fixed to the other spar end portion 2 (in the illustrated case, the end cross girder 62 in the bridge axis direction (or the main girder end portion not shown)). A bolt 7 is connected, and the other end of the anchor bolt 7 is connected to a male vertical steel plate 42 which is a base fixed to the other spar end 2 by a nut attached thereto. The male side vertical steel plate 42 is provided with a base vertical steel plate 43 having a flat plate-like support arm 4 extending horizontally toward one girder end 1 in the middle in the vertical direction. The base vertical steel plate 43 in the T-shaped male insertion fitting main body 44 is inserted into the bolt insertion holes 45 provided at the four corners of the base vertical steel plate 43 and the female screw hole of the male side vertical steel plate 42. A plurality of bolts 47 screwed into 46 are integrally fixed, and a recess 43a provided on the back surface of the base vertical steel plate 43 and a recess 42a provided on the surface of the male vertical steel plate 42 have a short columnar steel. A shearing key 48 is fitted and integrated by the bolt 47 or the shearing key 48 so that a vertical load can be transmitted.

  The support arm 4 is decentered in advance downward with respect to the base vertical steel plate 43 by the thickness of the precompression plate 13 provided on the female bracket 3 side from the center in the vertical direction of the base vertical steel plate 43. Even if the horizontal center axis of the female receiving metal fitting 3 and the horizontal central axis passing through the center of the support arm 4 in the male insertion metal fitting 5 are vertically shifted, the female vertical metal receiving metal 3 is vertically The level of the upper and lower ends of the steel plate 8 and the level of the upper and lower ends of the male side vertical steel plate 42 of the male insertion fitting 5 are configured to coincide with each other so that the installation positions of the anchor bolts 7 are the same level. .

  A plurality of female screw holes 49 are provided in the front and rear surfaces of the support arm 4 in the male insertion fitting main body 44 at intervals in the left-right direction, and a shear key mounting recess 50 is provided. A plurality of female screw holes 49 and shear key mounting recesses 50 are alternately provided on both front and rear surfaces of 43 at intervals in the vertical direction.

  Side reinforcing vertical steel plates 51 made of trapezoidal steel plates are integrally assembled and fixed by bolts 52 and shear keys 53 on both front and rear surfaces of the support arm 4 and the base vertical steel plate 43 so that the support arm 4 and the base vertical steel plate 43 are assembled. Is reinforced. A plurality of bolt insertion holes 54 are provided at an intermediate portion in the vertical direction inside the side reinforcing vertical steel plate 51 and spaced in the left-right direction, and a shear key mounting recess 55 is provided between these bolt insertion holes. Moreover, a plurality of bolt insertion holes 54 and shear key mounting recesses 55 are alternately provided on the inner side of the base end side of the side reinforcing vertical steel plate 51 at intervals in the vertical direction. 4 and a steel cylindrical shear key 53 is fitted and mounted across the recess 50 of the base vertical steel plate 43 and the recess 55 of the side reinforcing vertical steel plate 51, and is inserted into the bolt insertion hole 54 of the side reinforcing vertical steel plate 51. The side reinforcing vertical steel plate 51 is inserted into the supporting arm 4 and the base vertical steel plate 43 by the bolt 52 inserted into the female screw hole 49 provided in the support arm 4 or the base vertical steel plate 43 and by the shear key 53. They are fixed together.

  Each of the side reinforcing vertical steel plates 51 is close to the upper elastic support holding portion 9 and the lower support holding portion 10 of the female bracket 3 on the front side or the rear side in the direction perpendicular to the bridge axis with a slight gap. Arranged.

A plurality of female screw holes 56 are provided on the outer surface of the side reinforcing vertical steel plate 51 at intervals in the vertical direction so that the temporary fixing bracket (temporary fixing angle member) 29 can be attached and detached by the bolt 31. In addition, after the temporary fixing bracket 29 is removed, the removed bolt 31 can be mounted for backfilling.
The male insertion fitting 5 is composed of a male insertion fitting main body 44, a side reinforcing vertical steel plate 51, a male vertical steel plate 42, and bolts that connect and integrate them.

  The assembly set of the female receiving metal fitting 3 and the male insertion metal fitting 5 is performed at a factory, and is assembled until the temporary fixing metal fitting 29 is mounted or the anchor bolt 7 and the anchor plate 16 are included.

  In assembling the male insertion fitting 5 to the female receiving fitting 3, the base portion of the female receiving fitting 3 and the male insertion fitting 5 is held by appropriate movable holding means (not shown). In this state, the elastic support 6 is attached to the lower elastic support holding part 10 from the lower side with the bolt 25, and the upper elastic support 6 with the preliminary compression plate 13 fixed on the support arm 4 of the male plug 5 is placed. The support arm 4 in the state is disposed at a predetermined position below the upper elastic support holding portion 9, and in this state, the upper elastic support 6 is pressed by the long bolt 14, so that the female support By pressing the lower elastic bearing 6 against the lower surface of the support arm 4 so that the metal fitting 3 is lifted, pre-compression can be simultaneously applied to both the upper elastic bearing 6 and the lower elastic bearing 6.

  In this state, the outer frame 21 is attached, and the outer frame 21 and the side reinforcing vertical steel plate 51 are temporarily fixed by the temporary fixing bracket 29, the bolt / nut 28, and the bolt 31. An assembly set of the female receiving bracket 3 and the male inserting bracket 5 from the movable holding means in a state in which the relative displacement of the mold inserting bracket 5 is prevented and transportable (see FIGS. 13 and 13). Remove (see FIG. 14).

  In this state, the anchor plate 16 may be mounted on the site and may be assembled and set up to the anchor plate 16 at the factory as will be described later.

  Note that a female fitting hole for a hanging fitting or a hanging fitting (not shown) is attached to the female receiving bracket 3, the male insertion fitting 5, the outer frame 21, or the like.

  Stepped anchor bolts 7 having small-diameter male screw shaft portions 60 at both ends are attached to the assembly of the female receiving metal fitting 3 and the male insertion fitting 5 in the small-diameter male screw shaft portions in the through holes 59 at the four corners. 60, and the anchor bolts 7 are fixed at one end side by nuts 57 and lock nuts 58, and the anchor plate 16 is disposed at the outer end side of the anchor bolts 7 so that the anchor bolts 7 A nut 57 and a lock nut 58 are attached to the outer end of the anchor plate 16 to fix the anchor plate 16.

  As described above, the anchor plate 16 and the female vertical steel plate 8 or the male vertical steel plate 42 may be fixed so as to sandwich the end horizontal beams 62, but the assembly including the anchor plate 16 is attached to the beam end portion. The concrete 61 may be placed so as to be embedded in the anchor bolt 7 and the anchor plate 16.

  In the state in which the male insertion fitting 5 is inserted and attached to the female receiving fitting 3, due to elastic deformation of the elastic layer 35 in the elastic bearing 6 (vertical compression deformation and shear deformation in the bridge axis direction) The male support fitting 5 functions as a main shaft side, and the female support fitting 3 supports the support arm 4 of the male insert fitting 5. It functions as a receiver.

  According to the said form, in order to transmit a load elastically between the female type metal fitting 3 and the male type metal fitting 5, the elastic bearing 6 is provided between the female type metal fitting 3 and the male type metal fitting 5. When a vertical load due to a wheel load acts on one girder end 1, the vertical load can be elastically buffered and transmitted to the other girder end 2. Since this is a hinge bearing that cushions and transmits a vertical load, excessive stress concentration does not act, so that the durability of the hinge bearing portion can be improved, and further the running performance of the vehicle can be improved.

  A vertical compression force is applied to the elastic bearing 6 interposed between the female receiving bracket 3 and the male insertion fitting 5. As described above, since the vertical compression force is applied to the elastic bearing 6, even if a vehicle wheel load smaller than the preliminary compression force of the elastic bearing 6 acts on the end of the girder, this causes the end of the girder. There is no step in the vertical direction between them, and the running performance of the vehicle can be improved.

  The support arm 4 of the male insertion fitting 5 is inserted and disposed in the female receiving bracket 3, and the lower surface of the upper elastic support 6 is slidably contacted with the upper surface of the support arm 4, The upper surface of the lower elastic support 6 is slidably abutted on the lower surface of 4, and one end of each elastic support 6 is fixed to the female receiving bracket 3.

  In this case, when a vertical load due to a wheel load is applied to the girder end 2 on the male insertion fitting 5 side, the girder end on the male insertion fitting 5 side is elastically provided via the lower elastic support 6. When the vertical load due to the wheel load acts on the girder end 1 on the side of the female receiving bracket 3, the male insertion fitting is provided via the upper elastic bearing 6. The vertical load can be transmitted by elastically buffering at the end of the 5 side spar.

In the above embodiment, the preliminary compression plate 13 and the upper elastic support 6 are arranged in the upper elastic support holding part 9, but the preliminary compression plate 13 is interposed in the lower elastic support holding part 10, By compressing the lower elastic bearing 6 side, preliminary compression may also be applied to the upper elastic bearing 6.
Further, the preliminary compression may be adjusted from both the upper and lower sides by arranging the preliminary compression plates 13 in both the upper elastic bearing holding portion 9 and the lower elastic bearing holding portion 10. If it does in this way, when it cannot adjust from the upper part side after construction, it can adjust from the underside.

  When implementing the present invention, after introducing the precompression force, if it is necessary to introduce an additional compression force, the outer frame 21 is removed, and the short bolt 15 is replaced with the long bolt 14. An additional compressive force is introduced by the long bolt 14, and an adjustment plate is further interposed between the upper elastic support holder 9 and the preliminary compression plate 13, and then the short bolt 15 is further removed from the long bolt 14. It is possible to adjust the hinge elastic bearing device to which the additional compressive force is introduced by replacing the outer frame 21 with the outer frame 21.

  In the embodiment, the anchor bolt 7, the anchor plate 16 and the female side vertical steel plate 8 or the male side vertical steel plate 42 constitute a strong frame-shaped frame. The elastic hinge support device between the spar end portions of the invention can be firmly fixed to the spar end portions.

  Since the male side insertion metal fitting 5 and the female side insertion metal fitting 3 are mechanically assembled by means of steel members, bolts, shear keys, etc., they can be assembled easily and accurately.

In carrying out the present invention, the female receiving metal body 11 and the female vertical steel plate 11 may be formed integrally in advance, and the female vertical steel plate 11 is fixed to the female receiving metal body 11 by welding. You may do it.
Similarly, the male-side vertical steel plate 42, the male-type insertion metal fitting main body 44, and the side-reinforcing vertical steel plate 51 in the male insertion fitting 5 may be integrally formed in advance, and these may be fixed by welding. And may be assembled.
In the case of the above embodiment, the elastic bearing 6 is surrounded by the upper elastic bearing holding part 9, the lower elastic bearing holding part 10, the support arm 4, the side reinforcing vertical steel plate 51, etc. Since it is the form enclosed by the type | mold insertion metal fitting 5 and being built-in, the possibility that the elastic bearing 6 collides with another object and is damaged can be excluded.

In the case of the above-described embodiment, the mode in which the elastic support 6 side is slid and moved with respect to the support arm 4 in the male insertion fitting 5 has been shown. Referring to FIG. 9 and FIG. 9, the elastic bearing 6 and the support arm 4 may be integrated by a shear key or a bolt so as not to move in the lateral direction. For example, when integrating with a shear key, the distance between the support arm 4 in the male insertion fitting 5 and the upper and lower elastic bearing holders 9 and 10 in the female receiving fitting 33 is set to a short cylindrical shear key. The sliding plate 38 in the elastic bearing 6 is omitted, the sliding bearing plate 38 is used as a simple bearing plate, and a shear key fitting recess is provided at the center thereof. The support arm 4 is provided with a recess for fitting a shear key, and is assembled with the shear key attached to the lower elastic support side or the upper side of the support arm 4 side. A dimension adjusting plate 18 may be inserted.
Further, when the elastic support 6 and the support arm 4 are integrated by bolts so as not to move in the lateral direction, the overhang projecting laterally in the direction perpendicular to the bridge axis is provided on the slide support plate 38 in which the slide plate 38 is omitted. A steel plate with a flange is provided, a female screw hole is provided in the support arm 4, and the bolt is inserted into the bolt shaft insertion hole provided in the overhanging portion of the steel plate with the flange, and the bolt is screwed into the female screw hole of the support arm 4. You may make it make it.
As described above, when the elastic bearing 6 and the support arm 4 are integrated with a shear key or a bolt so as not to move in the lateral direction, the bridge 1 of the ordinary bridge girder 1 is obtained by shear deformation of the elastic layer 35 in the elastic bearing 6. , 3 may correspond to expansion and contraction due to temperature change. Moreover, you may make it respond | correspond to the displacement of the bridge girder of the bridge girders 1 and 3 at the time of an earthquake.

It is a partially longitudinal side view which shows the state which installed the elastic hinge support apparatus between the edge parts of this invention in the edge part. It is a partial cross-sectional top view of FIG. FIG. 2 is a partially cutaway vertical side view showing a part of FIG. 1 in an enlarged manner. FIG. 3 is a partially cutaway plan view showing a part of FIG. 2 in an enlarged manner. The male insertion metal fitting main body is shown, Comprising: (a) is a front view, (b) is a side view, (c) is a top view. The side part vertical reinforcement steel plate is shown, Comprising: (a) is a side view, (b) is a front view. The preliminary compression plate is shown, wherein (a) is a plan view and (b) is a side view. The female receiving metal main body is shown, wherein (a) is a plan view, (b) is a side view, and (c) is a front view. An elastic bearing is shown, Comprising: (a) is a top view, (b) is a partially vertical side. The female side vertical steel plate used as the base by the side of a female type metal fitting is shown, (a) is a rear view, (b) is a top view. It is a figure which shows the male side vertical steel plate used as the base at the side of a male insertion metal fitting, Comprising: (a) is a front view, (b) is a top view. The temporary fixing metal fitting is shown, Comprising: (a) is a side view, (b) is a top view. It is a side view which shows the assembly of a female receiving metal fitting, a male insertion metal fitting, and an outer frame. It is a top view of the assembly shown in FIG. It is an enlarged explanatory view showing the relationship between the long bolt and the short bolt used when pre-compression is applied to the elastic bearing. It is a schematic side view which shows an example of the structure of the existing bridge.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 One girder edge part 1a One bridge girder 2 The other girder edge part 2a The other bridge girder 3 Female receiving metal fitting 4 Support arm 5 Male insertion metal fitting 6 Elastic bearing 7 Anchor bolt 8 Female side vertical steel plate 8a Stepped through-hole 8b Bolt 8c Recess 9 Upper elastic bearing holder 10 Lower elastic bearing holder 11 Female bracket body 11a Female screw hole 11b Recess 12 Shear key 13 Precompression plate 14 Long bolt 15 Short bolt 16 Anchor plate 17 Female screw hole 18 Adjustment plate 19 Outer frame mounting female screw hole 20 Bolt 21 Outer frame 22 Side frame member 23 Stepped through-hole 24 Mounting steel plate 24a Female screw hole 25 Upper frame member 25a Bolt 26 Lower frame member 27 Bolt / nut 28 Bolt / nut 29 Temporary fixing bracket 29a One piece 29b Other piece 29c Bolt insertion hole 29d Bolt insertion long hole 30 Side vertical plate 31 Bolt 32 Recess 3 Stepped Through Hole 34 Bolt 35 Elastic Layer 36 Pressure-Reinforced Steel Plate 37 Sliding Plate Fixing Steel Plate 38 Sliding Plate 39 Sliding Bearing Plate 40 Bridge Pier 41 Hinge Bearing 42 Male Side Vertical Steel Plate 42a Recess 43 Base Vertical Steel Plate 43a Recess 44 Male Difference Bolt body 45 Bolt insertion hole 46 Female screw hole 47 Bolt 48 Shear key 49 Female screw hole 50 Recess 51 Side reinforcing vertical steel plate 52 Bolt 53 Shear key 54 Bolt insertion hole 55 Recess 56 Female screw hole 57 Nut 58 Lock nut 59 Through hole 60 Small diameter Male thread shaft 61 Concrete

Claims (3)

  A hinge support device between girder ends projecting in the direction of the bridge axis, wherein one girder end portion is provided with a female receiving bracket projecting toward the other girder end portion, and the other girder end portion A male insertion bracket that protrudes toward the end of one girder is provided, and in order to transmit a load elastically between the female reception bracket and the male insertion bracket, the female reception bracket and the male An elastic hinge support device between girder ends, characterized in that an elastic support is interposed between the plug fittings.   The elastic bearing interposed between the female receiving bracket and the male insertion fitting is provided with a vertical pre-compression force between the end portions of the girder according to claim 1. Elastic hinge support device.   A support arm of a male plug fitting is inserted and disposed in the female receiving bracket, and the lower surface of the upper elastic support is slidably abutted on the upper surface of the support arm, and the lower surface of the support arm is lower. The upper end of each elastic support is slidably contacted, and one end of each elastic support is held by the female receiving bracket between the ends of the girders according to claim 1 or 2. Elastic hinge support device.

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