Airbag abutment anti-collision device

Abstract

The present invention discloses an airbag abutment anti-collision device, comprising: a steel pipe, which is arranged between the abutment and the main beam of the bridge along the transverse direction of the bridge, the outer surface of the steel pipe is provided with an anti-corrosion layer, the two ends of the steel pipe are sealed, and the interior is divided into a plurality of airbag cavities, a rubber airbag is arranged inside the airbag cavity, and the airbag is filled with inert gas; an elastic member, which is arranged on one side of the steel pipe, one end of the elastic member is anchored to the back of the wall of the abutment through an anchoring pad, and the other end is anchored to the steel pipe; a rubber pad, which is arranged on the other side of the steel pipe, and a certain interval is formed between the rubber pad and the main beam of the bridge. The present invention can resist the larger horizontal inertial force of the main beam in an earthquake, can prevent the longitudinal displacement of the main beam of the bridge caused by the horizontal earthquake from being too large and colliding with the abutment or even falling, and can restore the horizontal longitudinal displacement of the main beam after the earthquake.

Description

Technical Field

[0001] The present invention relates to the technical field of disaster prevention and shock reduction of engineering structures, and more specifically, to an airbag-type bridge abutment anti-collision device. Background Art

[0002] Bridges are an important part of modern transportation hubs. In recent years, earthquake disasters have caused bridges to be damaged to varying degrees, seriously affecting transportation and post-earthquake rescue. Under the action of earthquakes, the main beam undergoes longitudinal displacement under the action of longitudinal earthquakes. When the main beam and the abutment back wall directly undergo a large relative displacement, it is easy to produce a collision, which can cause cracks in the abutment back wall, tilting of the abutment and other earthquake damage phenomena.

[0003] In response to the current phenomenon that the bridge main beam collides with the abutment wall under the action of earthquakes, or even causes the beam to fall due to excessive longitudinal displacement of the main beam, relevant scholars at home and abroad have carried out a lot of research, including setting longitudinal limiters, anti-collision devices and anti-beam falling devices between the main beam and the abutment. However, the existing anti-collision devices between the bridge main beam and the abutment have various defects, such as low resistance, complex manufacturing process, high cost, etc. Therefore, it is necessary to design an anti-collision device with high resistance, simple manufacturing process and low cost. Summary of the invention

[0004] The present invention provides an airbag-type abutment anti-collision device, which can resist the larger horizontal inertia force of the main beam during an earthquake, prevent the main beam of the bridge from being excessively displaced longitudinally due to a horizontal earthquake and colliding with the abutment or even falling, and enable the main beam to recover its horizontal longitudinal displacement after the earthquake.

[0005] In order to achieve these advantages according to the present invention, an airbag abutment anti-collision device is provided, comprising:

[0006] A steel pipe is arranged between the abutment and the main beam of the bridge in the transverse direction of the bridge, the outer surface of the steel pipe is provided with an anti-corrosion layer, the two ends of the steel pipe are sealed, and the interior is divided into a plurality of airbag cavities, a rubber airbag is arranged inside the airbag cavity, and the airbag is filled with an inert gas, the number of the airbag cavities is the same as the number of the box chambers or beam ribs of the main beam of the bridge, and the transverse length of one airbag cavity is greater than the transverse length of one box chamber or beam rib;

[0007] An elastic member is arranged on one side of the steel pipe, one end of the elastic member is anchored to the back wall of the abutment through an anchoring pad, and the other end is anchored to the steel pipe, and the longitudinal length of the anchoring pad is less than the longitudinal length of the natural extension of the elastic member and less than the longitudinal length of the airbag cavity;

[0008] A rubber pad is arranged on the other side of the steel pipe. The transverse length of the rubber pad is equal to the transverse length of the steel pipe and is greater than the transverse length of the bridge beam. A certain distance is formed between the rubber pad and the bridge beam.

[0009] Preferably, the steel pipe is a square steel pipe.

[0010] Preferably, the elastic member is a spring.

[0011] Preferably, the interior of the steel tube is divided by a partition, a pair of partitions forms an airbag cavity, two adjacent airbag cavities do not share a partition, and an anchor point of the elastic member is arranged between the two adjacent airbag cavities.

[0012] Preferably, the anti-corrosion layer is FRP cloth.

[0013] Preferably, both ends of the steel pipe are sealed with concrete.

[0014] Preferably, the rubber airbag inside the airbag cavity is filled with nitrogen.

[0015] The present invention has at least the following beneficial effects:

[0016] First, the present invention can prevent the end of the bridge main beam from hitting the abutment under the action of an earthquake. The combination of the elastic component, the airbag cavity, and the rubber pad is arranged, and each part can effectively consume a part of the earthquake energy. After the earthquake, due to the recovery of the volume of the airbag cavity and the recovery of the elastic component, the bridge main beam can be pushed, thereby restoring a part of the displacement of the bridge main beam and restoring the bridge main beam. If the present invention is damaged in an earthquake, it can be replaced in time after the earthquake, which is convenient and quick;

[0017] Second, the two sides of the steel pipe are installation surfaces, and it is advisable to select a flat surface. There is no restriction on the selection of materials for the anti-corrosion layer, as long as it has the function of preventing the steel pipe from corroding, such as epoxy resin coating, attachments, and steel pipes are selected to set airbag cavities. The steel pipe has a certain flexibility. After the beam end hits, it can bend to a certain extent, thereby compressing the airbag cavity and consuming part of the earthquake energy. The number and size of an airbag cavity correspond to one beam to ensure that under the action of a longitudinal earthquake, when the main beam moves toward the abutment, it can compress the airbag cavity instead of compressing the airbag cavity partition or the space between adjacent airbag cavities. After the earthquake occurs, the material in the airbag cavity releases energy and restores volume, thereby pushing the beam end to restore part of the displacement. There is a rubber airbag in the middle of the airbag cavity, and the rubber airbag is filled with inert gas, which is added according to the specific use requirements. The gas in the rubber airbag only needs to be compressible, release energy and expand after compression, and it is an inert gas, that is, it does not corrode the rubber airbag, and it will not explode when the temperature rises during compression. The side of the steel pipe close to the abutment is an elastic component, which is anchored The solid pad is anchored on the back of the abutment wall. There is no unique requirement for the number and variety. The number and variety can be increased or decreased according to specific needs. As long as it can release energy and reset after compression, it can be used. The function of the elastic component is also to compress during the impact of the beam end on the present invention, and release energy after an earthquake to push the main beam to reset. The longitudinal length of the naturally extended elastic component is greater than the thickness of the anchor pad and less than the longitudinal thickness of the airbag cavity. The two ends of the elastic component are fixedly connected to the anchor bolt, and the length of the anchor bolt is greater than the thickness of the anchor pad to ensure that the anchor bolt can be anchored to the abutment. The specific length extending into the abutment is determined by calculation. The other side of the steel pipe close to the main beam of the bridge is a rubber pad, the length of which is the same as the length of the steel pipe, and the thickness is set according to needs. It is preferably glued to the anti-corrosion layer of the steel pipe. The distance between the back of the abutment wall and the main beam of the bridge is less than the designed support length of the abutment, so as to realize the support of the abutment to the box chamber or beam rib of the main beam of the bridge, so as to prevent the beam end from not being at the abutment support under the action of an earthquake, thereby causing the beam to fall. The rubber pad is a superelastic material, which can effectively consume part of the energy of the beam end impact;

[0018] Third, the steel pipe is preferably a square steel pipe, which is convenient for material acquisition and processing; springs are selected as elastic components for easy material acquisition and equal spacing of multiple springs. One spring forms a longitudinal energy release body and also forms a main beam reset push fulcrum; partitions are set inside the steel pipe to separate adjacent airbag cavities, and holes are punched on the side close to the abutment between adjacent airbag cavities for spring anchoring, so that the airbag cavities can be independently stressed and rebounded; the anti-corrosion layer is preferably FRP cloth, which is convenient for material acquisition and installation, and the steel pipe has good anti-corrosion performance; both ends of the steel pipe are preferably sealed with concrete, which has a stable and solid sealing effect and is convenient for forming a closed space isolated from the outside world; the gas in the rubber airbag is preferably nitrogen, which does not corrode the rubber airbag at room temperature and is not easy to react in a compressed state, thereby ensuring the durability of the airbag cavity.

[0019] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a technical solution of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0022] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0023] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, set, or detachably connected, set, or connected and set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. The orientation or position relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0024] like Figure 1 As shown, the present invention provides an airbag abutment anti-collision device, comprising:

[0025] A steel pipe 5 is arranged between the abutment 2 and the bridge main beam along the transverse direction of the bridge, an anti-corrosion layer 6 is provided on the outer surface of the steel pipe 5, both ends of the steel pipe 5 are sealed, and the inside is divided into a plurality of airbag cavities 9, a rubber airbag is provided inside the airbag cavity 9, and the inside of the airbag is filled with an inert gas, the number of the airbag cavities 9 is the same as the number of the box chambers or beam ribs of the bridge main beam, and the transverse length of one airbag cavity 9 is greater than the transverse length of one box chamber or beam rib;

[0026] An elastic member 8 is arranged on one side of the steel pipe 5, one end of the elastic member 8 is anchored to the back wall of the abutment 2 through an anchoring pad 7, and the other end is anchored to the steel pipe 5, and the longitudinal length of the anchoring pad 7 is less than the longitudinal length of the natural extension of the elastic member 8 and less than the longitudinal length of the airbag cavity 9;

[0027] The rubber pad 3 is arranged on the other side of the steel pipe 5. The transverse length of the rubber pad 3 is equal to the transverse length of the steel pipe 5 and is greater than the transverse length of the bridge beam. A certain interval is formed between the rubber pad 3 and the bridge beam.

[0028] In the above technical scheme, the present invention can prevent the beam end of the bridge main beam from hitting the abutment 2 under the action of an earthquake. A combination of an elastic component 8, an airbag cavity 9, and a rubber pad 3 is provided, and each part can effectively consume a part of the earthquake energy. After the earthquake, due to the recovery of the volume of the airbag cavity 9 and the recovery of the elastic component 8, the bridge main beam can be pushed, thereby restoring a part of the displacement of the bridge main beam and resetting the bridge main beam. If the present invention is damaged in an earthquake, it can be replaced in time after the earthquake, which is convenient and quick.

[0029] The two sides of the steel pipe 5 are installation surfaces, and a flat surface is preferably selected. The material selection of the anti-corrosion layer 6 is not limited, as long as it has the function of preventing the steel pipe 5 from being corroded, such as epoxy resin coating, attachment, and the steel pipe 5 is selected to set the airbag cavity 9. The steel pipe 5 has a certain flexibility. After the beam end hits, it can bend to a certain extent, thereby compressing the airbag cavity 9 and consuming part of the earthquake energy. The number and size of an airbag cavity 9 corresponds to one beam, so as to ensure that under the action of a longitudinal earthquake, when the main beam moves toward the abutment 2, the airbag cavity 9 can be compressed instead of being compressed to the airbag cavity. The space between the partition 4 of the airbag cavity 9 or the adjacent airbag cavity 9, after an earthquake occurs, the material in the airbag cavity 9 releases energy and restores volume, thereby pushing the beam end to restore a part of the displacement. There is a rubber airbag in the middle of the airbag cavity 9, and the rubber airbag is filled with inert gas, which is added according to the specific use requirements. The gas in the rubber airbag can be compressed, and can release energy and expand after compression, and it is an inert gas, that is, it does not corrode the rubber airbag, and it will not explode when the temperature rises during compression. The side of the steel pipe 5 close to the abutment 2 is an elastic member 8, which is anchored to the back of the abutment 2 wall through the anchor pad 7. The number and variety are not the only requirements, and the number can be increased or decreased and the variety can be selected according to specific needs, as long as it can release energy and reset after compression. The function of the elastic member 8 is also to compress during the impact of the beam end on the present invention, and release energy after an earthquake occurs, pushing the main beam to reset. The longitudinal length of the naturally extended elastic member 8 is greater than the thickness of the anchor pad 7 and less than the longitudinal thickness of the airbag cavity 9. The two ends of the elastic member 8 are fixedly connected to the anchor bolts, and the length of the anchor bolts is greater than the thickness of the anchor pad 7, ensuring that the anchor bolts can be anchored to the bridge On the platform 2, the specific length extending into the abutment 2 is determined by calculation. The other side of the steel pipe 5 close to the main beam of the bridge is a rubber pad 3, the length of which is the same as the length of the steel pipe 5, and the thickness is set according to needs. It is preferably glued to the anti-corrosion layer 6 of the steel pipe 5. The distance between the back wall of the abutment 2 and the main beam of the bridge is less than the designed support length of the abutment 2, so that the abutment 2 supports the box chamber or beam rib of the main beam of the bridge to prevent the beam end from not being at the support of the abutment 2 under the action of an earthquake, thereby preventing the beam from falling. The rubber pad 3 is a superelastic material, which can effectively consume part of the energy of the impact of the beam end.

[0030] In another technical solution, the steel pipe 5 is a square steel pipe 5. The steel pipe 5 is preferably a square steel pipe 5, which is convenient for material collection and processing.

[0031] In another technical solution, the elastic member 8 is a spring, which is convenient for obtaining materials and arranging multiple springs at equal intervals. One spring forms a longitudinal energy release body and also forms a main beam reset push fulcrum.

[0032] In another technical solution, the interior of the steel tube 5 is divided by a partition 4, a pair of partitions 4 form an airbag cavity 9, two adjacent airbag cavities 9 do not share a partition 4, and an anchor point of the elastic member 8 is set between two adjacent airbag cavities 9. The interior of the steel tube 5 is divided by a partition 4, and a hole is punched on one side of the adjacent airbag cavities 9 close to the abutment 2 for spring anchoring, so that the airbag cavities 9 are independently stressed and rebound.

[0033] In another technical solution, the anti-corrosion layer 6 is FRP cloth. The anti-corrosion layer 6 is preferably FRP cloth, which is convenient for material acquisition and installation, and the steel pipe 5 has good anti-corrosion performance.

[0034] In another technical solution, the two ends of the steel pipe 5 are sealed by concrete 1. The two ends of the steel pipe 5 are preferably sealed with concrete 1, which has a stable and solid sealing effect and is convenient for forming a closed space isolated from the outside world.

[0035] In another technical solution, the rubber airbag inside the airbag cavity 9 is filled with nitrogen. Nitrogen does not corrode the rubber airbag at room temperature and is not easy to react in a compressed state, thereby ensuring the durability of the airbag cavity 9.

[0036] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0037] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. The airbag abutment anti-collision device is characterized by: include: A steel pipe is arranged between the abutment and the main beam of the bridge in the transverse direction of the bridge, the outer surface of the steel pipe is provided with an anti-corrosion layer, the two ends of the steel pipe are sealed, and the interior is divided into a plurality of airbag cavities, a rubber airbag is arranged inside the airbag cavity, and the airbag is filled with an inert gas, the number of the airbag cavities is the same as the number of the box chambers or beam ribs of the main beam of the bridge, and the transverse length of one airbag cavity is greater than the transverse length of one box chamber or beam rib; An elastic member is arranged on one side of the steel pipe, one end of the elastic member is anchored to the back wall of the abutment through an anchoring pad, and the other end is anchored to the steel pipe, and the longitudinal length of the anchoring pad is less than the longitudinal length of the natural extension of the elastic member and less than the longitudinal length of the airbag cavity; A rubber pad is arranged on the other side of the steel pipe, the transverse length of the rubber pad is equal to the transverse length of the steel pipe and is greater than the transverse length of the bridge beam, and a certain interval is formed between the rubber pad and the bridge beam; The interior of the steel tube is divided by a partition, a pair of partitions forms an airbag cavity, two adjacent airbag cavities do not share a partition, and an anchor point of the elastic component is arranged between the two adjacent airbag cavities.

2. The airbag abutment anti-collision device according to claim 1, characterized in that: The steel pipe is a square steel pipe.

3. The airbag abutment anti-collision device according to claim 1, characterized in that: include: The elastic component is a spring.

4. The airbag abutment anti-collision device according to claim 1, characterized in that: The anti-corrosion layer is FRP cloth.

5. The airbag abutment anti-collision device according to claim 1, characterized in that: Both ends of the steel pipe are sealed with concrete.

6. The airbag abutment anti-collision device according to claim 1, characterized in that: The rubber airbag inside the airbag cavity is filled with nitrogen.

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