CN114541244A - A self-resetting anti-vibration block - Google Patents

Abstract

The invention relates to a self-resetting anti-vibration block, comprising a plurality of cover beams, a bridge main body and a concrete block. At least one set of anti-vibration block systems are respectively provided at both ends of each of the cover beams, and each group of anti-vibration block systems includes a support unit and a block unit; the support unit includes a base and a diagonal strut arranged under the base, one end of the base is provided with a bottom plate, the bottom plate is close to the side wall of the cover beam, and the lower end of the diagonal strut is provided with a support plate, The support plate is in close contact with the side wall of the cover beam; the block unit includes a vertical seat arranged above the base and a top seat arranged on one side of the vertical seat, the upper end of the vertical seat is connected with a vertical plate, and a vertical plate is arranged between the vertical plate and the base There are connecting bolts; one end of the top seat is provided with a top plate, the top plate is provided with a rubber shock-absorbing pad, and the rubber shock-absorbing pad is closely attached to the side wall of the bridge main body. On the basis of the original concrete block, the invention adds an anti-seismic block system, which has the effect of double-layer anti-seismic and the effect of resetting the main body of the bridge.

Description

A self-resetting anti-vibration block

technical field

The invention relates to the technical field of bridge anti-seismic, in particular to a self-reset anti-seismic block.

Background technique

Bridges are the hub of transportation and an indispensable lifeline in infrastructure construction. Bridges have now become a mode of transportation alongside roads. The communication of bridges can greatly speed up exchanges between regions and promote economic development.

Earthquakes in our country are frequent, release large energy, and have the characteristics of rapidity and unpredictability, which will cause great damage to bridges. Among them, the phenomenon of falling beams of bridges and the collapse of superstructures is a common occurrence in earthquake damage.

Among the current bridge anti-seismic measures, only the construction personnel set the blocks according to the past experience. When the cover beam is poured, both ends are poured with upwardly convex concrete blocks. Under the action of strong earthquakes, the blocks do not have any shock absorption measures. The bridge directly collides with it rigidly, resulting in a large impact force, which is very easy to cause brittle failure of the block, which not only reduces or loses its limiting ability, but also causes damage to the main structure of the cover beam, resulting in the deflection of the main beam of the bridge. Or crash accident, repair is difficult.

A part of the detachable block structure is adopted, such as a replaceable self-adaptive bridge anti-seismic block device disclosed in Authorized Bulletin No. CN214737329U. The scheme needs to redesign the cover beam structure to adapt to the block in the scheme, the block It can be disassembled and replaced, but it is not suitable for the built bridge; another example is a self-resetting multi-directional energy-consuming and anti-vibration block structure disclosed in the application publication number CN110485263A. The seismic structure is complex and the amount of reconstruction is large, and the impact force of the bridge body indirectly acts on the block. Once the block fails, the seismic capacity will be lost, resulting in serious consequences. To this end, a self-reset anti-vibration block is proposed.

SUMMARY OF THE INVENTION

In order to solve the problem of poor protection performance of the existing block, the present invention provides a self-reset anti-seismic block, which effectively improves the anti-seismic capability of the bridge and prevents the occurrence of the phenomenon of falling beams.

For achieving the above object, the technical scheme adopted in the present invention is:

A self-resetting anti-seismic block, comprising a plurality of cover beams, a bridge main body arranged between the plurality of cover beams, and concrete blocks arranged at both ends of each cover beam, the concrete blocks are a cast-in-place member or a prefabricated member. ;

Both ends of each of the cover beams are further provided with at least one group of anti-vibration block systems, and each group of the anti-vibration block systems includes a support unit and a block unit;

The support unit comprises a horizontally arranged base and a diagonal strut arranged obliquely below the base, one end of the base is provided with a bottom plate, the bottom plate is close to the side wall of the cover beam, and is provided with pre-embedded long ribs for connection, The lower end of the diagonal strut is provided with a support plate, the support plate is closely attached to the side wall of the cover beam, and is provided with pre-embedded short ribs for connection;

The block unit includes an upright seat vertically arranged above the base and a top seat horizontally arranged on one side of the upright seat. There are connecting bolts between the bridges for connection. The connecting bolts at this position can effectively provide the deformation capacity requirements of the bridge body under the action of earthquakes, so that the bridge body has a certain self-resetting function;

The top seat is located above the concrete block, and the top seat is one of a fixed structure or an elastic telescopic structure. One end of the top seat is provided with a top plate, which is provided with a rubber shock-absorbing pad, and the rubber shock-absorbing pad is closely attached the side wall of the bridge body.

Further, the two ends of the cover beam extend upward to form the concrete block, and the cross section of the concrete block is one of a rectangle or a trapezoid; There is at least one set of the anti-vibration block systems at each end, and the set number of the anti-vibration block systems can be increased or decreased according to site conditions.

Further, the base is one of an I-beam or H-shaped steel structure, and one end of the base is welded with the bottom plate; the diagonal strut is an angle steel structure, and the number of diagonal struts is two, which are symmetrically arranged on both sides of the base. The upper end of the diagonal strut is welded on the base, and the lower end is welded with the support plate. The support plate and the bottom plate are both steel plate structures, and the diagonal strut can stably support the base.

Further, the pre-embedded long bars and the pre-embedded short bars are all through-long bars, the pre-embedded long bars and the pre-embedded short bars are arranged up and down, and both are embedded in the cover beam, the pre-embedded long bars and the cover Epoxy resin is respectively filled between the beams, between the pre-embedded short bars and the cover beams to seal and improve the integrity of the connection between the long bars and the cover beams; The support plates are all connected by welding or bolts, and the connection and combination of the support unit and the cover beam are in a triangular structure to ensure the stability of the installation of the support unit.

Further, the vertical seat is one of I-beam or H-shaped steel structure, the lower end of the vertical seat is welded with the base, the upper end of the vertical seat is welded with the vertical plate, and the vertical plate is a steel plate structure; the connecting bolts are at least one set. , the number of the connecting bolts in each group is two, and they are symmetrically arranged on both sides of the stand.

Further, one end of the top seat is welded to the vertical seat, the other end of the top seat is welded to the top plate, and the rubber shock-absorbing pad is bonded to the top plate.

Further, the top seat is a fixed structure, and the top seat is one of I-beam or H-shaped steel structure, and the connecting bolt is also provided between the top plate and the vertical seat, and the connecting bolt at this position raises the top seat. Install securely.

Further, the top seat is an elastic telescopic structure, and the top seat includes a damping rod and a shock-absorbing spring sleeved on the damping rod, and the shock-absorbing spring is tightly pressed between the top plate and the vertical seat; on the basis of the connecting bolts , which can further improve the deformation capacity of the bridge under the action of earthquake, and improve the self-reset function of the bridge.

Through the above-mentioned technical scheme, the beneficial effects of the present invention are:

The structure of the invention is reasonable in design, and on the basis of the original concrete block, an anti-seismic block system is added, which has the effect of double-layer anti-seismic and has a stronger anti-seismic prevention effect, so that the bridge is not easily damaged in a large earthquake, and the bridge can be ensured It can also be used normally during a major earthquake.

The anti-vibration block system of the invention is mainly composed of I-beam and connecting bolts, and has the advantages of simple structure, convenient material selection, convenient installation and low cost. The I-beam flange is wide, rigid, and has strong bending resistance, and the two surfaces of the flange are parallel to each other, which makes connection, processing and installation easy; the connecting bolts can provide reaction force, greatly reduce the residual deformation capacity of the bridge, and at the same time play the role of reset Effect.

Under the action of the connecting bolt, the top seat and the rubber shock-absorbing pad, the present invention can limit a certain lateral displacement of the bridge, effectively prevent the occurrence of the falling beam phenomenon, and prevent the impact of the concrete block. The roof seat is of different structure. The roof seat with elastic expansion and contraction structure can not only effectively limit the lateral displacement of the bridge, but also provide a reaction force for self-resetting.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of a self-resetting anti-vibration block of the present invention.

Fig. 2 is a schematic diagram of a fixed structure top seat of a self-resetting anti-vibration block according to the present invention.

FIG. 3 is a schematic view of the self-resetting anti-vibration block of the present invention in the direction A of FIG. 2 .

FIG. 4 is a schematic diagram of a self-resetting anti-vibration block of the present invention in direction B of FIG. 2 .

FIG. 5 is a schematic diagram of a top seat of an elastic telescopic structure of a self-resetting anti-vibration block according to the present invention.

FIG. 6 is a schematic view of a self-resetting anti-vibration block of the present invention in the direction C in FIG. 5 .

Fig. 7 is a schematic view of the D-direction in Fig. 5 of a self-resetting anti-vibration block of the present invention.

In the accompanying drawings, the reference numbers are: 1 is a cover beam, 2 is a bridge main body, 3 is a concrete block, 4 is a base, 5 is a diagonal strut, 6 is a bottom plate, 7 is a pre-embedded long rib, 8 is a support plate, and 9 is a Pre-embedded short ribs, 10 is a vertical seat, 11 is a top seat, 12 is a vertical plate, 13 is a connecting bolt, 14 is a top plate, and 15 is a rubber shock-absorbing pad.

Detailed ways

The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings:

Example 1:

As shown in FIGS. 1 to 4 , a self-resetting anti-seismic block includes several cover beams 1 , a bridge main body 2 arranged between the several cover beams 1 , and concrete blocks 3 arranged at both ends of each cover beam 1 . The bridge main body 2 is supported by a plurality of cover beams 1 , and the two ends of the cover beams 1 extend upward to form the concrete blocks 3 during construction.

The concrete block 3 is a cast-in-place component or a prefabricated component, and the cross section of the concrete block 3 is either a rectangle or a trapezoid. For a new bridge, the concrete block 3 can be selected from a prefabricated component, which is assembled and connected with the cover beam 1, and it is easy to replace the concrete block 3 once it is damaged.

In this embodiment, on the basis of the existing concrete blocks 3 , at least one set of anti-vibration block systems are respectively provided at both ends of each of the cover beams 1 . That is, both ends of the cover beam 1 are evenly provided with the anti-vibration block systems, and the anti-vibration block systems at each end are at least one set. The number of anti-seismic block systems can be appropriately increased or decreased according to the size of the bridge on site, the width of the cover beam 1, etc., so that it has effective impact resistance.

Each group of the anti-vibration block system includes a support unit connected to the cover beam 1 and a block unit arranged above the support unit.

The support unit includes a base 4 arranged horizontally and a diagonal strut 5 arranged obliquely below the base 4 . The base 4 is one of I-beam or H-shaped steel structures, and one end of the base 4 is provided with a bottom plate 6, that is, one end of the base 4 is welded to the bottom plate 6, the bottom plate 6 is a steel plate structure, and the bottom plate 6 is close to the cover. The side walls of the beam 1 are provided with pre-embedded long bars 7 for connection.

The pre-embedded long rib 7 is a through-long rib structure, and the pre-embedded long rib 7 is embedded in the cover beam 1 . When the pre-embedded long ribs 7 are installed, holes are formed in the side walls of the cover beam 1 to form a channel, and epoxy resin is filled into the channel to seal the channel. The integrity of the long rib 7 connection.

When the pre-embedded long ribs 7 are installed with the bottom plate 6, the pre-embedded long ribs 7 and the bottom plate 6 are connected by welding or bolts. Specifically, the bottom plate 6 is cut in advance, and the embedded long ribs 7 are inserted therein and then welded, or a nut is installed to realize the firm connection between the embedded long ribs 7 and the bottom plate 6 .

In this embodiment, the number of the pre-embedded long bars 7 is four, and the number of the pre-embedded long bars 7 needs to be changed in time according to the weight of the shock-absorbing block system, and the actual installation quantity is determined according to the on-site construction conditions.

In order to ensure the firm installation of the base 4 and improve the stability of the support unit, the diagonal struts 5 are of an angle steel structure, and the number of diagonal struts 5 is two, which are symmetrically arranged on both sides of the base 4, and the diagonal struts 5 serve to support the base 4, and connect with the cover beam 1 at the same time.

The lower end of the diagonal strut 5 is provided with a support plate 8 . When the diagonal strut 5 is installed, the upper end of the diagonal strut 5 is welded on the base 4, and the lower end is welded with the support plate 8. The support plate 8 is a steel plate structure, and the support plate 8 is close to the side wall of the cover beam 1 and between Pre-embedded short ribs 9 are provided for connection.

The pre-embedded short bars 9 are of a through-length bar structure, the pre-embedded long bars 7 and the pre-embedded short bars 9 are arranged up and down, and the pre-embedded short bars 9 are also embedded in the cover beam 1 . The installation method of the pre-embedded short ribs 9 and the cover beam 1 is the same as the above-mentioned installation method of the pre-embedded long ribs 7, which will not be repeated here. The installation of the embedded short ribs 9 and the support plate 8 also adopts one of welding or bolt connection, and the installation method is the same as the installation method of the embedded long ribs 7 and the bottom plate 6, and will not be repeated here.

The support unit and the cover beam 1 are connected and combined to form a stable triangular structure, which can effectively support the block unit and also ensure the stability of the anti-vibration block system.

In this embodiment, the block unit includes a stand 10 vertically disposed above the base 4 and a top stand 11 horizontally disposed on one side of the stand 10 . The vertical seat 10 is one of I-beam or H-shaped steel structures. The lower end of the vertical seat 10 is welded with the base 4, and the upper end of the vertical seat 10 extends upward beyond the concrete block 3 and is connected to a vertical plate 12, that is, the vertical seat 10. The vertical plate 12 is welded on the top, and the vertical plate 12 is a steel plate structure.

In order to further ensure the ability of the stand 10 to withstand impact, connecting bolts 13 are provided between the stand 12 and the base 4 for connection. The connecting bolts 13 are at least one group, and each group of the connecting bolts 13 is two in number, symmetrically arranged on both sides of the stand 10, and the connecting bolts 13 are prestressed bolts.

The number of connecting bolts 13 is set according to the site conditions, but it is necessary to ensure that the number of connecting bolts 13 on both sides of the stand 10 is evenly distributed to ensure that the stand 10 can bear the impact force evenly.

The top seat 11 is located above the concrete block 3 , the top seat 11 is one of a fixed structure or an elastic telescopic structure, and one end of the top seat 11 is provided with a top plate 14 . When the top seat 11 is installed, the top seat 11 can be set in the middle or the upper part of the vertical seat 10 according to the site conditions; one end of the top seat 11 is welded with the vertical seat 10, and the other end of the top seat 11 is welded with the top plate 14, The top plate 14 is a steel plate structure.

The top plate 14 is provided with a rubber shock absorbing pad 15 , and the rubber shock absorbing pad 15 is closely attached to the side wall of the bridge main body 2 . When the rubber shock absorbing pad 15 is installed, the rubber shock absorbing pad 15 is bonded to the top plate 14 . Specifically, the surface of the rubber shock-absorbing pad 15 needs to be degreased, and the adhesive is bonded with cold glue or hot vulcanized adhesive.

In this embodiment, the top seat 11 is a fixed structure, the top seat 11 is one of I-beam or H-shaped steel structure, the connection and combination of the vertical seat 10 and the top seat 11 are in a "T" shape, which can be directly fixed The structural top 11 provides the force. The connecting bolts 13 are also provided between the top plate 14 and the standing base 10 , and the connecting bolts 13 further ensure the firmness of the mounting of the top base 11 and the standing base 10 .

The anti-seismic block system of the present invention contacts the bridge main body 2 first, and when encountering a small earthquake, the anti-seismic block system preferentially plays its role, thereby preventing the concrete block 3 from being directly damaged and causing damage to the cover beam 1 . At the same time, the rubber shock-absorbing pad 15 has a certain buffering effect on the impact of the bridge main body 2, and the connecting bolts 13 on both sides of the stand 10 can provide the effect of reaction force.

The connecting bolts 13 can not only withstand the energy transmitted by the bridge body 2 against the anti-vibration block system under the action of the earthquake, but also consume a part of the seismic energy together with the rubber shock absorbing pad 15 to reduce the lateral displacement of the bridge body 2 . At the same time, when the impact force of the earthquake is within a certain range, the connecting bolts 13 can also enable the entire anti-seismic block system to have a self-reset function.

The materials required for the anti-seismic block system of the present invention are simple and easy to obtain, the construction is simple, the cost is low, and it has sufficient strength to cope with the displacement of the bridge main body 2; At the same time, it can be applied to different bridge types to meet their seismic requirements. On the basis of the original concrete block 3, the present invention cooperates with the anti-seismic block system again to achieve the effect of double-layer anti-seismic, and can be popularized and applied.

Embodiment 2:

As shown in FIG. 5 to FIG. 7 , this embodiment is basically the same as the first embodiment, and the similarities will not be repeated. The difference is that: the top seat 11 is an elastic expansion and contraction structure, and the top seat 11 is at least two arranged up and down. Each group of top seats 11 includes a damping rod and a shock-absorbing spring sleeved on the damping rod, and the shock-absorbing spring is tightly pressed between the top plate 14 and the vertical seat 10 .

The connection and combination of the vertical base 10 and the top base 11 are in a double "T" shape, which can also directly provide force for the top base 11 of the elastic telescopic structure. Compared with the top seat 11 of the fixed structure, the top seat 11 of the elastic telescopic structure in this embodiment also has an effective shock absorption effect through the cooperation of the damper and the shock-absorbing spring, and can further consume the energy of the earthquake again.

The mutual cooperation of the connecting bolt 13 and the top seat 11 of the elastic structure can increase the reaction force limiting the lateral displacement of the bridge, and at the same time, the self-resetting ability of the entire anti-vibration block system can be further improved through the cooperation of the two. The restoring force of the damper and the shock-absorbing spring can push the bridge main body 2 to reset and reduce the residual deformation after the earthquake.

The above-mentioned embodiments are only preferred embodiments of the present invention and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made in accordance with the structures, features and principles described in the patent scope of the present invention are It should be included in the scope of the patent application of the present invention.

Claims (8)

1. A self-resetting anti-seismic stop block comprises a plurality of cover beams (1), a bridge main body (2) arranged among the cover beams (1) and concrete stop blocks (3) arranged at two ends of each cover beam (1), and is characterized in that the concrete stop blocks (3) are cast-in-place components or prefabricated components;

at least one group of anti-seismic stop block systems are respectively arranged at two ends of each bent cap (1), and each group of anti-seismic stop block systems comprise a supporting unit and a stop block unit;

the supporting unit comprises a base (4) and an inclined strut (5), wherein the base (4) is horizontally arranged, the inclined strut (5) is obliquely arranged below the base (4), a bottom plate (6) is arranged at one end of the base (4), the bottom plate (6) is tightly attached to the side wall of the bent cap (1), a pre-embedded long rib (7) is arranged between the bottom plate and the bent cap for connection, a supporting plate (8) is arranged at the lower end of the inclined strut (5), the supporting plate (8) is tightly attached to the side wall of the bent cap (1), and a pre-embedded short rib (9) is arranged between the supporting plate and the bent cap (1) for connection;

the stop block unit comprises a vertical stand (10) arranged above a base (4) and a top seat (11) horizontally arranged on one side of the stand (10), the upper end of the stand (10) upwards extends to exceed a concrete stop block (3) and is connected with a vertical plate (12), a connecting bolt (13) is arranged between the vertical plate (12) and the base (4) for connection, the top seat (11) is located above the concrete stop block (3), the top seat (11) is of a fixed structure or an elastic telescopic structure, a top plate (14) is arranged at one end of the top seat (11), a rubber shock pad (15) is arranged on the top plate (14), and the rubber shock pad (15) is tightly attached to the side wall of the bridge main body (2).

2. A self-resetting anti-seismic stop according to claim 1, characterized in that both ends of the capping beam (1) extend upwards to form the concrete stop (3), and the cross section of the concrete stop (3) is one of rectangular or trapezoidal;

the two ends of the bent cap (1) are uniformly provided with the anti-seismic stop block systems, and the anti-seismic stop block systems at each end are at least one group.

3. A self-resetting anti-seismic stop according to claim 1, characterized in that said base (4) is one of i-steel or H-steel structure, said bottom plate (6) being welded to one end of base (4);

the inclined supporting rods (5) are of angle steel structures, the number of the inclined supporting rods (5) is two, the inclined supporting rods are symmetrically arranged on two sides of the base (4), the upper ends of the inclined supporting rods (5) are welded to the upper end and the lower end of the base (4) and welded to the supporting plates (8), and the supporting plates (8) and the bottom plate (6) are of steel plate structures.

4. The self-resetting anti-seismic stop block according to claim 3, characterized in that the embedded long ribs (7) and the embedded short ribs (9) are all of a through long rib structure, the embedded long ribs (7) and the embedded short ribs (9) are arranged up and down and are embedded in the bent cap (1), and epoxy resin is filled between the embedded long ribs (7) and the bent cap (1) and between the embedded short ribs (9) and the bent cap (1) respectively for sealing;

the supporting structure is characterized in that one of welding or bolt connection is arranged between the embedded long rib (7) and the bottom plate (6) and between the embedded short rib (9) and the supporting plate (8), and the supporting unit and the cover beam (1) are connected and combined to form a triangular structure.

5. The self-resetting anti-seismic stop block according to claim 1, characterized in that the vertical base (10) is one of an I-steel structure or an H-steel structure, the lower end of the vertical base (10) is welded with the base (4), the upper end of the vertical base (10) is welded with the vertical plate (12), and the vertical plate (12) is of a steel plate structure;

the number of the connecting bolts (13) in each group is two, and the connecting bolts (13) in each group are symmetrically arranged on two sides of the vertical seat (10).

6. A self-resetting anti-seismic stop block according to claim 1, characterized in that one end of the top seat (11) is welded with the vertical seat (10), the other end of the top seat (11) is welded with the top plate (14), and the rubber shock pad (15) is bonded on the top plate (14).

7. A self-resetting anti-seismic stop block according to claim 6, characterized in that the top seat (11) is a fixed structure, the top seat (11) is one of I-steel or H-steel structure, and the connecting bolt (13) is also arranged between the top plate (14) and the vertical seat (10).

8. A self-resetting anti-seismic stop according to claim 6, characterized in that said top seat (11) is of an elastically telescopic structure, said top seat (11) comprising a damping rod and a shock-absorbing spring sleeved on said damping rod, said shock-absorbing spring being tightly abutted between said top plate (14) and said vertical seat (10).

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