CN204676412U - A kind of bidirectionally limited one-way movable basin type rubber - Google Patents

Abstract

The utility model discloses a kind of bidirectionally limited one-way movable basin type rubber, comprise one-way movable basin type rubber, its structure is: two sides, inactive side of the top board of one-way movable basin type rubber are welded and fixed column type block; Two inactive sides of end basin are fixedly connected with end basin extension plate, and the upper surface screw thread of end basin extension plate fixes " door " font position-limited rack; Column type block is positioned at " door " font position-limited rack, and the upper limb of column type block contacts with the crossbeam of " door " font position-limited rack, and the interval between two root posts of column type block and " door " font position-limited rack is 50-300mm.This bearing have under geological process constraint roof movement to over-large displacement and the effect of top board displacement straight up, each bridge pier of bridge stressed, the anti-seismic performance that gives full play to each bridge pier jointly can be realized; And this bearing continues to use now backed production technology and mounting technique, is convenient to the reparation of engineer applied and earthquake rear support.

Description

A two-way limited one-way movable basin rubber bearing

technical field

The utility model relates to a one-way movable basin-type rubber bearing of a bridge, which belongs to the field of civil construction.

Background technique

Bearings are functional components that connect bridge girders and piers. The main girder of the bridge will stretch and rotate during work due to temperature and other reasons. The bridge support can eliminate the restrictions on the above deformation of the main girder by the bridge piers through proper structure, so that the main girder can expand and rotate freely.

Bridge supports can be divided into three categories according to their motion characteristics. One is fixed supports, which can only meet the needs of the main girder rotation of the bridge, and cannot slide in the length and width directions of the main girder; the other is one-way movable supports. In addition to the rotation function, this type of support can also limit the displacement of the main beam of the bridge along the width direction of the bridge, bear the horizontal load of the main beam, and adapt to the expansion and contraction of the main beam along the length direction of the bridge; the third is a two-way sliding support. In addition to the function of rotation, the quasi-support can also slide in the length direction and width direction of the bridge. Bridge bearings can be divided into steel bearings and rubber bearings according to their materials. At present, the bearings in my country are mainly rubber bearings, and the one-way basin rubber bearing is one of the most commonly used bearings.

The one-way movable basin rubber bearing is mainly composed of the bottom basin, the rubber plate on the bottom basin, the middle steel plate fixed on the rubber plate, the PTFE plate, the stainless steel slide plate fixed on the upper top plate, the top plate and the two inactive sides of the top plate. composed of lateral steel bars. The roof and main girder are fixed by anchor bolts, and the bottom basin is fixed by anchor bolts and pier. This kind of rubber bearing can realize the rotation of the main girder of the bridge through the characteristics of the fluid properties of the rubber plate under the three-way stress state; at the same time, relying on the low friction coefficient between the PTFE plate and the stainless steel sliding plate to realize the main girder along the length of the bridge (moving direction) displacement, so that the force along the length of the bridge that the rubber bearing bears is no longer fully borne by the rubber plate, but indirectly acts on the slip between the PTFE plate and the stainless steel slide plate. In addition, the lateral steel bars on the two inactive sides of the roof limit the movement of the girder along the width direction of the bridge (inactive direction).

One-way movable bearings are often used in conjunction with fixed bearings. In simply supported girder bridges, one end of the main girder adopts fixed bearings and the other end adopts one-way movable bearings; while in continuous girder bridges, only one pier is arranged and fixed The rest of the bridge piers are arranged with one-way movable supports, the horizontal displacement of the main girder of the bridge is constrained by the fixed bearings, and the horizontal load of the main girder is borne by the movable supports to adapt to the expansion and contraction of the main girder.

Under the action of earthquake load, the existing one-way movable basin bearing can only transmit a small horizontal seismic force (3%-6%) through the friction between the PTFE plate and the stainless steel plate, see the traffic industry standard of the People's Republic of China, " Basin Rubber Bearings for Highway Bridges" (JT/T391-2009), there is no special device to limit the displacement in the active direction. Unrecoverable excessive displacements are prone to occur during earthquakes, and there is no seismic energy dissipation function. The horizontal earthquake of the main girder of the bridge Most of the action is transmitted from the fixed support to the bridge pier, so that the earthquake internal force of the fixed support bridge pier is much larger than that of other bridge piers, and the damage is also more serious than other bridge piers (see Wenchuan Earthquake Highway Damage Investigation-Bridges, People's Communications Publishing Society, 2012.3, ISBN 978-7-114-09590-0), can not give full play to the seismic capacity of each pier in the bridge.

Moreover, the existing pot-type rubber bearings can only bear vertical pressure and cannot bear vertical tension. Under excessive vertical earthquake action, the top plate and the PTFE plate may be separated, causing the bearing to be voided and damaged (see Wenchuan Earthquake Damage Investigation of Highway——Bridge, People's Communications Press, 2012.3, ISBN 978-7-114-09590-0).

Utility model content

The purpose of this utility model is to provide a one-way movable basin type that can restrict the excessive displacement of the roof's movable direction and the vertical upward displacement of the roof under the action of an earthquake, and can realize the common stress of each pier of the bridge and fully exert the seismic performance of each pier Rubber mounts. The support can continue to use the production technology and installation technology of the existing one-way movable basin rubber bearing, which is convenient for engineering application and the repair of the support after an earthquake.

The technical solution adopted by the utility model to achieve the purpose of the invention is: a two-way limit one-way movable basin rubber bearing, including a one-way movable basin rubber bearing, and its structural characteristics are: the one-way movable basin rubber bearing The two non-movable sides of the top plate of the rubber bearing are welded and fixed with cylindrical stoppers; the two non-movable sides of the bottom basin of the one-way movable basin rubber bearing are fixedly connected to the bottom basin extension plate, and the upper surface of the bottom basin extension plate is screwed The "door"-shaped limit frame; the cylindrical block is located in the "door"-shaped limit frame, the upper edge of the cylindrical block is in contact with the beam of the "door"-shaped limit frame, and the cylindrical block is in contact with the "door"-shaped limit frame. The interval between the two columns of the limit frame is 50-300mm (the allowable displacement of the bearing of the corresponding specification stipulated in the traffic industry standard of the People's Republic of China, "Potted Rubber Bearing of Highway Bridge" (JT/T391-2009) quantity).

The working principle of the utility model is:

When the temperature changes or under the action of ordinary external force, the main girder of the bridge drives the top plate of the one-way movable basin rubber bearing to move, and the cylindrical stopper will move together with the top plate. The spacing between the columns can accommodate the deformation of the main beam due to temperature changes or ordinary external forces.

When an earthquake occurs, under the action of the earthquake load, the movement of the main girder of the bridge is greater than the distance between the cylindrical block and the column of the "door"-shaped limit frame, and the distance between the cylindrical block and the column of the "door"-shaped limit frame contact, limit the displacement of the roof, and transmit the seismic action of the main girder to the column of the "gate"-shaped limit frame through the cylindrical stopper, and then transmit it to the bottom basin of the support and the bridge pier through the column of the "gate"-shaped limit frame. Realize that the bridge piers with one-way movable bearings and the bridge piers with fixed bearings share the seismic force of the main girder. And when the cylindrical block, the column and the beam of the "door"-shaped limit frame are plastically deformed, part of the kinetic energy of the main beam can be converted into the heat energy of the cylindrical block and the "door"-shaped limit frame, thereby dissipating Seismic energy, increased bearing damping.

Under the action of excessive vertical seismic force, the contact between the upper edge of the cylindrical block and the beam of the "door"-shaped limit frame can restrain the vertical displacement of the roof, so that the support has the ability to bear vertical tension.

Compared with the prior art, the beneficial effects of the utility model are:

1. The utility model can continue to use the production technology and installation technology of the existing one-way movable basin rubber bearing, which is convenient for engineering application.

2. On the basis of the existing basin-type rubber bearing structure, a cylindrical stopper and a "door"-shaped limit frame are attached to limit the vertical displacement of the top plate of the bearing, and at the same time limit the movement of the one-way movable bearing along the movable direction. large displacement, and transfer the seismic action of the main girder of the bridge to the pier with one-way movable support, and change the original single fixed support pier to bear the seismic load to all the pier to share the seismic load, giving full play to the seismic load of all pier The seismic capacity of the entire bridge has been greatly improved.

3. Under the earthquake load, after the cylindrical block, the column and the beam of the "door"-shaped limit frame are plastically deformed, part of the kinetic energy of the main beam can be converted into the thermal energy of the cylindrical block and the "door"-shaped limit frame , thereby dissipating the seismic energy.

4. After an earthquake, only need to replace the plastically deformed cylindrical block and the "door"-shaped limit frame, the repair of the bearing can be realized, which is convenient for the repair of the bearing after the earthquake, reduces the cost and improves the efficiency.

Further, the specific way in which the upper edge of the cylindrical block of the utility model is in contact with the crossbeam of the "door"-shaped limit frame is: the upper half arc of the cylindrical block is attached to the arc-shaped stainless steel sheet in a welded form, " The lower flange of the crossbeam of the "door"-shaped limit frame is pasted with a PTFE plate; the stainless steel sheet and the PTFE plate form a friction pair.

In this way, the friction pair made of the stainless steel plate and the PTFE plate can reduce the friction force between the cylindrical stopper and the beam of the “door”-shaped limit frame, and adapt to the expansion and contraction of the main beam.

Further, the specific way of the fixed connection between the bottom basin and the bottom basin extension plate in the utility model is: the bottom basin and the bottom basin extension plate are welded and connected, or the bottom basin and the bottom basin extension plate are integrally cast.

Such a fixing method is simple, low in cost and firm in structure, and the utility model can use the production technology and installation technology of the existing one-way movable basin rubber bearing.

Further, the specific structure of the "door"-shaped spacer of the utility model is: the inner side of the column upper end of the "door"-shaped spacer is welded with a triangular connecting plate, and the crossbeam of the "door"-shaped spacer is composed of two opposite sides. It is composed of double-channel steel clamped on both sides of the triangular connecting plate. There is a connecting hole in the middle of the triangular connecting plate. The double-channel steel on both sides has channel steel holes corresponding to the connecting holes, and the steel shaft is inserted into the channel steel hole. Connect the crossbeam and column of " door " font limit frame with connecting hole.

Such a structure facilitates the installation of the beam of the "door"-shaped limit frame during the manufacturing process. During an earthquake, only the column of the "door"-shaped limit frame will produce plastic deformation, and only the column can be replaced without replacing the beam, saving post-earthquake maintenance costs.

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

Description of drawings

Fig. 1 is a schematic diagram of a three-dimensional structure of an embodiment of the utility model.

In the figure, a represents the active direction of the one-way movable pot rubber bearing, and b represents the non-active direction of the one-way movable pot rubber bearing.

Fig. 2 is a front view structural diagram of the embodiment of the utility model.

Fig. 3 is a side view structural diagram of an embodiment of the utility model.

Figure 4 is a schematic diagram of the installation of the column and crossbeam of the "door"-shaped limit frame.

Detailed ways

Example

Figure 1, Figure 2 and Figure 3 show that a specific embodiment of the present utility model is: a two-way limit one-way movable basin rubber bearing, including a one-way movable basin rubber bearing 1, and its structural characteristics Yes: the two inactive sides of the top plate 1.1 of the one-way movable basin rubber bearing 1 are welded and fixed to the cylindrical stopper 2; the two inactive sides of the bottom basin 1.2 of the one-way movable basin rubber bearing 1 are fixedly connected Bottom basin extension plate 3, the upper surface of bottom basin extension plate 3 is screwed and fixed " door " font limit frame 5; The crossbeam 5.1 of " door " font limiting frame 5 contacts, and the interval between two columns 5.2 of cylindrical block 2 and " door " font limiting frame 5 is 50-300mm.

The specific way in which the upper edge of the cylindrical stopper 2 contacts the crossbeam 5.1 of the "door"-shaped limit frame 5 in this example is: the upper half arc of the cylindrical stopper 2 is attached to the arc-shaped stainless steel sheet in a welded form 2.1, the lower flange of the beam 5.1 of the "door"-shaped limit frame 5 is pasted with a PTFE plate 5.3; the stainless steel sheet 2.1 and the PTFE plate 5.3 constitute a friction pair. the

The upper semi-circular arc of the cylindrical stopper 3 is pasted with an arc-shaped stainless steel sheet 3.1 in a welded form; the lower flange of the "door"-shaped limit frame beam 5.1 is attached with a PTFE plate 5.3, a stainless steel sheet 3.1 and a PTFE plate. Plate 5.3 constitutes the friction pair.

In this example, the specific way of fixed connection between the bottom basin 1.2 and the bottom basin extension plate 3 is: the bottom basin 1.2 and the bottom basin extension plate 3 are welded and connected, or the bottom basin 1.2 and the bottom basin extension plate 3 are formed by integral casting.

Fig. 4 shows, the concrete structure of " door " font limiting frame 5 described in this example is: the column 5.2 upper end inner side of " door " font limiting frame 5 is welded with triangular connecting plate 5.4, " door " font limiting frame The crossbeam 5.1 of 5 is made of two double-channel steels clamped on both sides of the triangular connecting plate 5.4 opposite to each other. The channel steel hole is inserted into the channel steel hole and the connecting hole to connect the crossbeam 5.1 and the column 5.2 of the "door" font spacer 5 by the steel shaft.

During installation, the utility model is fixed to the top plate 1.1 by the anchor bolts pre-embedded in the main beam, and fixed to the bottom basin 1.2 by the anchor bolts pre-embedded in the pier. Under earthquake action, when the displacement of the main girder is greater than the distance between the cylindrical block 2 and the column 5.2 of the "gate"-shaped limit frame 5, the column 5 of the "gate"-shaped limit frame constrains the displacement of the main girder, and makes multiple bridge piers Common force; under the action of excessive vertical seismic force, the contact between the upper edge of the cylindrical stopper 2 and the beam 5.1 of the "door"-shaped limit frame 5 can restrain the vertical displacement of the top plate 1.1 and make the one-way movement The pot rubber bearing 1 has the ability to bear vertical tension.

Claims (4)

1. A two-way limited one-way movable pot rubber bearing, comprising a one-way movable pot rubber bearing (1), characterized in that: the top plate (1.1 of the one-way movable pot rubber bearing (1) ) of the two non-movable sides of the side are welded and fixed cylindrical stoppers (2); the two non-movable sides of the bottom basin (1.2) of the one-way movable basin rubber bearing (1) are fixedly connected with the bottom basin extension plate (3), and the bottom The upper surface of the basin extension plate (3) is screwed to fix the "door" shape limiter (5); the cylindrical stopper (2) is positioned in the "door" shape limiter (5), and the cylindrical stopper (2) The upper edge is in contact with the crossbeam (5.1) of the "door"-shaped spacer (5), and the distance between the cylindrical block (2) and the two columns (5.2) of the "door"-shaped spacer (5) is equal. 50-300mm. 2. A two-way limited one-way movable basin-type rubber bearing according to claim 1, characterized in that: the upper edge of the cylindrical stopper (2) and the "door"-shaped limiter (5) The specific way of contacting the crossbeam (5.1) is: the upper semi-circular arc of the cylindrical block (2) is attached to the arc-shaped stainless steel sheet (2.1) in a welded form, and the crossbeam (5.1) of the "door"-shaped limit frame (5) ) is attached with a tetrafluoro plate (5.3); the stainless steel sheet (2.1) and the tetrafluoro plate (5.3) constitute a friction pair. 3. A two-way limited one-way movable basin-type rubber bearing according to claim 1, characterized in that: the specific way of fixed connection between the bottom basin (1.2) and the bottom basin extension plate (3) is: bottom The basin (1.2) is welded to the bottom basin extension plate (3), or the bottom basin (1.2) and the bottom basin extension plate (3) are integrally cast. 4. A two-way limited one-way movable basin-type rubber bearing according to claim 1, characterized in that: the specific structure of the "door"-shaped limit frame (5) is: "door"-shaped limit The inner side of the upper end of the column (5.2) of the frame (5) is welded with a triangular connecting plate (5.4), and the crossbeam (5.1) of the “door”-shaped limit frame (5) is clamped on the triangular connecting plate (5.4) by two opposite sides. It is composed of double channel steel on both sides, and there is a connecting hole in the middle of the triangular connecting plate (5.4), and there are channel steel holes corresponding to the connecting holes on the double channel steel on both sides, and the steel shaft is inserted into the channel steel hole to connect with the connecting hole. The crossbeam (5.1) and column (5.2) of " door " font limit frame (5).