Beam falling prevention device

Abstract

The utility model discloses a beam falling prevention device which comprises an energy consumption unit, a beam bottom anchoring steel bar and an anchoring sleeve, the energy consumption unit comprises an upper plate, a lower plate and a connecting plate, the two ends of the connecting plate are connected with the upper plate and the lower plate respectively, mounting holes are formed in the upper plate and the lower plate, and the beam bottom anchoring steel bar is fixedly mounted in the mounting holes of the upper plate through nuts. The anchoring sleeve is fixedly installed on the installation hole of the lower plate through the anchoring bolt and embedded in the abutment, and the beam bottom anchoring steel bar is embedded in the beam body. The energy dissipation device has the advantages that the energy dissipation units are arranged in the abutment and the beam body, earthquake energy can be dissipated in the longitudinal bridge direction and the transverse bridge direction at the same time, and therefore the damage degree of earthquake force to the beam body and the abutment is reduced, and the upper plate and the lower plate are connected with the beam bottom anchoring steel bars and the anchoring sleeves through the nuts and the anchoring bolts respectively. The beam falling prevention damper has the functions of a damper and a beam falling prevention function at the same time, the size is reduced, the structure is compact, environmental influence is low, and installation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of bridges, in particular to a beam falling prevention device. Background Technique

[0002] In high-intensity earthquake areas, the common method is to use isolation devices, damping devices and beam falling prevention devices in combination. Most damping devices use viscous dampers. One end of the viscous damper is connected to the bottom of the beam, and the other end is connected to the side of the pier. When seismic waves arrive, a damping effect is generated through the relative action between the internal viscous fluid molecules. This damping effect can convert the vibration energy of the structure into heat energy, thereby reducing the vibration amplitude of the structure. The beam falling prevention device mostly uses a beam falling prevention buffer chain and a beam falling prevention tie rod. The beam falling prevention buffer chain is a beam falling prevention device that combines a rubber buffer unit and a chain. One end is connected to the bottom of the beam, and the other end is connected to the side of the pier. The chain is mainly subjected to tensile force, and the rubber plays a buffering role. The beam falling prevention tie rod needs to reserve holes on the end cross diaphragm of the beam. After passing through the cross diaphragm, both ends are fixed with nuts to restrict the movement of the two beams within a small displacement range, thereby playing a role in preventing the beam from falling. However, the existing damping devices have large planar dimensions due to their structures or working principles, and have problems such as single direction, oil leakage, large temperature influence, high maintenance costs, poor durability, and inability to achieve vertical tensile resistance. The layout form of the beam falling prevention device is generally at the bottom of the beam and the top of the pier, and it cannot be installed by hoisting from the upper part with a crane. It can only be installed manually, and has high requirements for the accuracy of embedded parts. Construction errors are likely to cause the device to be unable to be installed or have poor use effects. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a beam falling prevention device.

[0004] The purpose of the utility model is realized through the following technical solutions: A beam falling prevention device includes an energy dissipation unit, beam bottom anchoring steel bars and anchoring sleeves. The energy dissipation unit includes an upper plate, a lower plate and a connecting plate. Both ends of the connecting plate are respectively connected to the upper plate and the lower plate. Installation holes are provided on both the upper plate and the lower plate. The beam bottom anchoring steel bars are fixedly installed on the installation holes of the upper plate through nuts, and the anchoring sleeves are fixedly installed on the installation holes of the lower plate through anchoring bolts, and the anchoring sleeves are embedded in the pier, and the beam bottom anchoring steel bars are embedded in the beam body.

[0005] Preferably, a steel plate is installed on the upper surface of the upper plate, and the steel plate is embedded in the beam body.

[0006] Preferably, the number of energy dissipation units is an even number.

[0007] Preferably, the connecting plate is in an S shape.

[0008] The utility model has the following advantages: by arranging the energy dissipation unit in the pier and the beam body, the seismic energy can be dissipated simultaneously in the longitudinal and transverse directions of the bridge, thereby reducing the damage degree of the seismic force to the beam body and the pier. Moreover, the upper plate and the lower plate are respectively connected to the anchoring steel bars and the anchoring sleeves at the bottom of the beam through nuts and anchoring bolts, enabling it to have both the functions of a damper and an anti-falling beam, while reducing the size, making the structure compact, and being less affected by the environment and convenient for installation. Description of the Drawings

[0009] Figure 1 It is a schematic structural diagram of the anti-falling beam device;

[0010] Figure 2 It is a schematic structural diagram of the initial state of the energy dissipation unit;

[0011] Figure 3 It is a schematic top view structural diagram of the initial state of the energy dissipation unit;

[0012] Figure 4 It is a schematic structural diagram of the energy dissipation state of the energy dissipation unit;

[0013] Figure 5 It is a schematic top view structural diagram of the energy dissipation state of the energy dissipation unit;

[0014] In the figure, 1 - anchoring steel bars at the bottom of the beam, 2 - steel plate, 3 - anchoring sleeve, 4 - anchoring bolt, 5 - energy dissipation unit, 6 - upper plate, 7 - connecting plate, 8 - lower plate, 9 - reserved hole. Detailed Embodiment

[0015] To make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. Usually, the components of the embodiments of the utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model to be protected, but merely represents the selected embodiments of the utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts fall within the scope of protection of the utility model.

[0017] It should be noted that, without conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0018] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0020] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] In this embodiment, as Figure 1 shown, an anti-falling beam device includes an energy dissipation unit 5, beam bottom anchoring steel bars 1, and anchoring sleeves 3. Preferably, the number of energy dissipation units 5 is an even number. The energy dissipation unit 5 includes an upper plate 6, a lower plate 8, and a connecting plate 7. The two ends of the connecting plate 7 are respectively connected to the upper plate 6 and the lower plate 8. Preferably, the connecting plate 7 is in an S shape. Installation holes are formed on both the upper plate 6 and the lower plate 8. The beam bottom anchoring steel bars 1 are fixedly installed on the installation holes of the upper plate 6 through nuts, and the anchoring sleeves 3 are fixedly installed on the installation holes of the lower plate 8 through anchoring bolts 4, and the anchoring sleeves 3 are embedded in the pier, and the beam bottom anchoring steel bars 1 are embedded in the beam body. By arranging the energy dissipation unit 5 between the pier and the beam body, seismic energy can be dissipated simultaneously in the longitudinal and transverse bridge directions, thereby reducing the damage degree of seismic force to the beam body and the pier. Moreover, the upper plate 6 and the lower plate 8 are respectively connected to the beam bottom anchoring steel bars 1 and the anchoring sleeves 3 through nuts and anchoring bolts 4, so that it has both the functions of a damper and an anti-falling beam, while reducing the size, making the structure compact, and having low environmental impact and being convenient for installation.

[0022] Furthermore, a steel plate 2 is installed on the upper surface of the upper plate 6, and the steel plate 2 is embedded in the beam body. Specifically, the steel plate 2 is welded integrally with the beam bottom anchoring steel bars 1 and embedded during the prefabrication of the beam body. The upper plate 6 and the steel plate 2 are connected integrally with the beam body through nuts. The anchoring sleeve 3 is installed on the installation holes of the lower plate 8 through the anchoring bolts 4 and placed in the reserved hole 9, and then the reserved hole 9 is filled with epoxy mortar and solidified to form a closed ring.

[0023] The working principle of the present utility model is as follows: As Figures 2 to 5 shown, when the energy dissipation unit 5 is in the initial state, the anchoring bolt 4 should be in the middle position. This state is to release the displacement of the beam body caused by temperature. Among them, the longitudinal temperature displacement is released at the upper part of the energy dissipation unit 5, that is, the upper plate 6, and the lateral temperature displacement is released at the lower part of the energy dissipation unit 5, that is, the lower plate 8.

[0024] When an earthquake comes, it will first consume the temperature displacement value. When the temperature displacement reaches the limit value, the force of the beam body is transmitted to the energy dissipation unit through the embedded parts and bolts. The energy dissipation unit generates plastic deformation to consume energy. At the same time, it is restricted by the tensile force of the connecting plate 7 in the vertical direction, which will restrict the movement of the beam body.

[0025] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A beam-falling prevention device, characterized in that: The invention comprises an energy dissipation unit (5), a beam bottom anchoring steel bar (1) and an anchor sleeve (3). The energy dissipation unit (5) comprises an upper plate (6), a lower plate (8) and a connecting plate (7). The two ends of the connecting plate (7) are respectively connected to the upper plate (6) and the lower plate (8). The upper plate (6) and the lower plate (8) are both provided with mounting holes. The beam bottom anchoring steel bar (1) is fixedly mounted on the mounting hole of the upper plate (6) by means of nuts. The anchor sleeve (3) is fixedly mounted on the mounting hole of the lower plate (8) by means of anchor bolts (4). The anchor sleeve (3) is pre-buried in the pier, and the beam bottom anchoring steel bar (1) is pre-buried in the beam body.

2. The anti-falling beam device according to claim 1, characterized in that: A steel plate (2) is installed on the upper surface of the upper plate (6), and the steel plate (2) is pre-buried in the beam body.

3. The anti-falling beam device according to claim 2, characterized in that: The number of the energy consumption units (5) is an even number.

4. The anti-falling beam device according to claim 3, characterized in that: The connecting plate (7) is S-shaped.

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