CN205874955U - Energy dissipation is from bridge anti -seismic dog structure that restores to throne - Google Patents

Abstract

The utility model discloses an energy-dissipating and self-resetting bridge anti-seismic block structure, which comprises a cover beam and a beam body. On the seismic support, stoppers are respectively provided at both ends of the cover beam, and the flat end of a concave steel plate with a through hole in the width direction of the protruding part is embedded in the stopper. The steel plate and a flipped steel plate with a through hole in the width direction of the protruding part and a slope surface at the flat end end are pierced with hinge pins in the hole and connected together to form a movable hinge, which is welded on the embedded part of the beam body A steel plate with the same slope angle at the end of a cantilever and the overturned steel plate, a number of springs are arranged at the end of the overturned steel plate, and the springs connect the overturned steel plate with the cover beam. Under the action of an earthquake, the utility model can dissipate the seismic energy and realize the self-resetting of the beam body through the movable hinge and several springs, reduce the occurrence of beam falling accidents, and improve the seismic performance of the bridge structure.

Description

Energy-dissipating Self-resetting Bridge Seismic Block Structure

technical field

The utility model relates to the technical field of bridge anti-seismic and bridge anti-seismic isolation, in particular to an energy-dissipating self-resetting bridge anti-seismic block structure.

Background technique

It can be seen from several major earthquakes in recent years that many bridge structures have been damaged due to the lack of reasonable and effective seismic isolation measures or structures. The beams of bridge structures have a large residual displacement after the earthquake, resulting in serious damage to the bridge deck. , Seriously affect driving safety, driving comfort and rescue and reconstruction work in earthquake-stricken areas. Therefore, how to design the shock-absorbing and isolation structure or device of the bridge structure so that the bridge has a self-resetting function after the earthquake or limits the displacement of the beam body within a certain range is always a bridge. It is a hot topic in engineering research, so as to reduce the cost of post-earthquake maintenance and reinforcement.

Under the action of strong earthquakes, the lateral displacement of the beam body is relatively large, and it is easy to collide with the block, which will cause shear brittle failure of the block and even the lateral drop of the beam, which will bring huge direct and indirect economic losses. The main reason is that the displacement of the beam body has not been effectively restrained under the action of the earthquake, and the seismic energy has not been reduced or dissipated.

After reading a large number of bridge anti-seismic, anti-seismic and isolation patents, the applicant found that the existing bridge anti-seismic devices seldom start from the addition of buffer energy dissipation anti-seismic structures outside the stoppers. At the same time, the construction of these devices is inconvenient and relatively expensive. high. In view of this, the applicant has been devoting himself to the development of an energy-dissipating self-resetting bridge anti-seismic block structure, which can effectively dissipate seismic energy under strong earthquakes, and can also make the beam body have a certain degree of self-defense. The reset function is used to reduce the large residual displacement of the beam body after the earthquake, reduce the damage of the stopper and the repair and reinforcement cost after the earthquake.

Utility model content

In view of the above-mentioned deficiencies in the prior art, devices and structures, the utility model proposes a method that can dissipate the seismic energy very effectively under the action of strong earthquakes, and can also make the beam body have a certain self-resetting function to reduce the post-seismic comparison of the beam body. Large residual displacement, energy-dissipating self-resetting bridge anti-seismic block structure that reduces block damage and post-earthquake maintenance and reinforcement costs.

In order to achieve the above purpose, the utility model adopts the following measures: an energy-dissipating and self-resetting bridge anti-seismic block structure, which is arranged at the junction of the cover beam and the beam body to reduce the impact of the beam body when the earthquake disaster occurs. energy and realize the self-resetting of the beam body. The top surface of the cover beam is provided with a shock-absorbing and isolating support, and the beam body is supported on the above-mentioned shock-absorbing and isolating support; the two ends of the cover beam are respectively provided with concrete anti-seismic blocks; the end of the anti-seismic block is provided with a movable hinge The overturned steel plate is hinged on the movable hinge and can rotate around the pin of the hinge shaft. Several springs connect the overturned steel plate with the cover beam; The stretched steel plate is parallel to the top surface of the flipped steel plate and has a certain height difference, and the opposite edges of the stretched steel plate and the flipped steel plate have slope surfaces with similar angles and opposite directions.

In actual implementation, the movable hinge is connected to the anti-seismic block through a concave steel plate, and the through holes in the width direction of the protruding parts at both ends of the concave steel plate support the hinge pin and form a movable hinge with the flipped steel plate; The flat end of the shaped steel plate is connected with the steel bars arranged in the concrete anti-seismic block; the flipped steel plate is a convex steel plate whose shape is complementary to the concave steel plate.

Before the concrete anti-seismic block is poured, the flat ends of the concave steel plates should be fixed together with the steel bars arranged in the concrete anti-seismic block, which can be done by welding or the like.

The diameter of the hinge pin should be slightly smaller than the diameters of the overturned steel plate and the hole of the concave steel plate, so as to ensure that the overturned steel plate can rotate around the hinge pin.

The same slope angle means that the slope surfaces of the steel plate welded on the embedded part of the beam body and the flipped steel plate are parallel to each other or the horizontal angles are equal.

Further, the spring is connected together by welding the end of the overturned steel plate and the embedded part on the cover beam.

Compared with the prior art, the energy-dissipating self-resetting bridge anti-seismic block structure provided by the utility model has the following beneficial effects:

1. Since the utility model is equipped with movable hinges and several springs, the beam body is likely to have a large displacement in the direction of the transverse bridge under the action of strong earthquakes, and the outstretched steel plate welded on the embedded part of the beam body first contacts with the slope at the end of the flipped steel plate , will force the overturned steel plate to move upward and rotate around the hinge pin. Due to the existence of the spring, the seismic energy can be dissipated through the deformation of the spring, thereby avoiding the collision between the beam body and the anti-seismic block directly. The large restoring force forces the beam to return to its original position. This process buffers the impact of the beam and effectively dissipates the seismic energy, which can significantly reduce the residual displacement of the beam after the earthquake. The beam body has a certain self-resetting function, and to a certain extent, it protects the anti-seismic block and improves the safety of the bridge structure. The structure of the utility model is simple, and the force transmission path is very clear. The whole process fully exerts the impact buffering effect of the spring and the effect of dissipating earthquake energy. At the same time, the spring is also easy to check and replace after it is damaged.

2. The cushioning effect of the utility model can be effectively adjusted by changing parameters such as spring stiffness, so as to meet the anti-seismic requirements of different bridge structures.

3. The construction of the utility model is convenient, the cost is low, and it has good engineering application prospects.

Description of drawings

Fig. 1 is a structural reference diagram of an energy-dissipating self-resetting bridge anti-seismic block structure of a specific embodiment.

FIG. 2 is a schematic cross-sectional view of A-A in FIG. 1 .

FIG. 3 is an enlarged schematic diagram of B in FIG. 1 .

FIG. 4 is an enlarged schematic diagram of point C in FIG. 2 .

detailed description

The conception, specific details and technical effects obtained of the present utility model will be further described below in conjunction with the accompanying drawings.

Fig. 1 schematically shows the structure of an energy-dissipating self-resetting bridge anti-seismic stopper according to an embodiment of the present invention. As shown in Figures 1 to 4, the bridge anti-seismic block includes a cover beam 1 and a beam body 2, the top surface of the cover beam 1 is provided with a shock-absorbing and isolation support 3, and the beam body 2 is supported on the On the shock-absorbing support 3, stoppers 4 are respectively provided at both ends of the cover beam 1, and the flat end of a concave steel plate 5 with a through hole in the width direction of the protruding part is embedded in the stopper In 4, the hinge pin 7 is pierced in the hole of the concave steel plate 5 and a flipped steel plate 6 with a through hole in the width direction of the protruding part and a slope surface at the flat end, and the two are connected together to form a living hinge. , weld a piece of cantilever end on the embedded part 8 of the beam body and the overhanging steel plate 9 with the same slope angle as the overturned steel plate, a number of springs 10 are arranged at the end of the overturned steel plate 6, and the springs 10 will overturn Steel plate 6 is connected with cover beam 1 together.

Specifically, according to the needs of the actual anti-seismic or shock-absorbing design of the bridge structure, two steel plates of a certain size are cut into convex and concave shapes respectively in advance, and through holes are drilled along the thickness direction, and the flat end and outer surface of the flipped steel plate are Stretch the steel plate 9 by turning over the end of the steel plate to process it into a slope with the same slope angle, weld the flat end of the steel plate 9 to the embedded part of the beam body, and then arrange the flat end of the concave steel plate with the stopper 4 The reinforced steel bars are welded together, and the block concrete is poured, the pegs are pierced in the holes of the flipped steel plate and the concave steel plate, and the two steel plates are connected together to form a movable hinge, so as to ensure that the beam body hits the slope of the flipped steel plate under the action of an earthquake. It can be rotated freely, and finally the two ends of the spring are respectively welded to the end of the overturned steel plate and the embedded part on the top surface of the cover beam, thus forming an energy-dissipating self-resetting bridge anti-seismic block structure. The utility model has the advantages of simple structure, clear force transmission path, convenient and fast construction, effective dissipation of seismic energy and certain self-resetting function of the beam body through reasonable calculation and analysis, thereby improving the overall seismic performance of the bridge structure.

In other specific embodiments, the spring in this embodiment can be replaced by a prestressed steel bar, and the hinge pin 7 can be replaced by a bolt. The utility model can be adopted in the longitudinal direction of the bridge to the block and the position of the abutment.

The application of the energy-dissipating and self-resetting bridge anti-seismic block structure of this embodiment is as follows: under normal service loads and small earthquakes, the end of the inverted steel plate of this structure is welded to the end of the extended steel plate on the embedded part of the beam body There is a certain gap. At this time, the structure does not affect the displacement and deformation of the beam body. The bridge structure can dissipate the seismic energy through the seismic isolation bearing itself.

Under the action of strong earthquakes, the beam body tends to have a large displacement in the transverse bridge direction. The steel plate welded on the embedded part of the beam body is in contact with the slope surface at the end of the flipped steel plate of this structure, and the impact will force the flipped steel plate to rotate around the pin 7 of the hinge axis. , due to the existence of the spring, this process can consume a large amount of seismic energy through the stretching and deformation of the spring, effectively avoiding the beam directly colliding with the stopper, and at the same time, due to the tendency of the spring to prevent the rotation of the flipped steel plate, a large Restoring force, so that the beam body has a certain self-resetting function, thus effectively reducing the collision damage of the lateral stopper and the occurrence of lateral beam drop. The structure makes full use of springs to buffer the impact and dissipate seismic energy, and significantly improves the safety of the bridge structure.

The above are only preferred specific embodiments of the present utility model. For those of ordinary skill in the art, without departing from the inventive concept of the present utility model, some modifications and improvements can be made without creative work, and these all belong to the protection scope of the present utility model.

Claims (6)

1. An energy-dissipating self-resetting bridge anti-seismic block structure, which is arranged on the junction of the cover beam and the beam body, is characterized in that, the cover beam top surface is provided with a shock-absorbing and isolating bearing, and the beam body is supported on the said absorbing On the seismic isolation support; the two ends of the cover beam are respectively provided with concrete anti-seismic blocks; the end of the anti-seismic block is provided with a movable hinge, the flipped steel plate is hinged on the movable hinge, and can rotate around the pin of the hinge shaft, and several springs will The overturned steel plate is connected with the cover beam; the part of the embedded part of the beam body corresponding to the overturned steel plate is connected with an overhanging steel plate, which is parallel to the top surface of the overturned steel plate and has a certain height difference. The edge opposite to the overturned steel plate has slope surfaces with similar angles and opposite directions. 2. The energy-dissipating self-resetting bridge anti-seismic block structure according to claim 1, characterized in that: the movable hinge is connected to the anti-seismic block through a concave steel plate, and the width direction of the protruding parts at both ends of the concave steel plate is The through hole supports the pin of the hinge shaft and forms a movable hinge with the flipped steel plate; the flat end of the concave steel plate is connected with the steel bars arranged in the concrete anti-seismic block; the flipped steel plate is complementary in shape to the concave steel plate Convex steel plate. 3. The energy-dissipating self-resetting bridge anti-seismic block structure according to claim 1, characterized in that: the diameter of the hinge pin is smaller than the diameter of the inner hole of the inverted steel plate and the concave steel plate. 4. The energy-dissipating self-resetting bridge anti-seismic block structure according to claim 1, characterized in that: The spring is welded to the end of the overturned steel plate and the embedded part on the cover beam to connect the two together. 5. The energy-dissipating self-resetting bridge anti-seismic block structure according to claim 1, characterized in that there is a certain gap between the flipped steel plate and the end of the extended steel plate. 6. The energy-dissipating self-resetting bridge seismic stopper structure according to claim 1, wherein the spring can be replaced by a prestressed steel bar.