Combined multi-stage energy dissipation buffer device for bridge

Abstract

The utility model discloses a bridge combined multi-stage energy consumption buffer device which comprises a steel jacket box, a steel partition plate used for separating space is arranged in the steel jacket box, and a first-stage energy consumption structure used for first-stage buffer energy consumption and a second-stage energy consumption structure used for second-stage buffer energy consumption are arranged in the separated space respectively. The steel jacket box is arranged outside the pier through the rubber fender. The UHPC panel and the stainless steel composite steel plate are adopted, and the service life of the structure is remarkably prolonged under the complex service environment of a water area. In the aspect of collision resistance, the high-strength steel grid structure has a definite deformation mode induction mechanism, the impact force is dispersed through the UHPC panel with large rigidity, the impact force is buffered through the honeycomb with small rigidity, the impact force is transmitted to the high-strength steel grid structure through the UHPC panel and the dense honeycomb, the energy consumption efficiency is greatly improved, the force transmission path is reasonable, coverage of different collision prevention levels can be achieved, and the energy consumption is reduced. And meanwhile, the compression stroke of the energy dissipation assembly is increased, the peak impact force is reduced, and designability is good.

Description

Technical Field

[0001] This utility model belongs to the field of infrastructure disaster prevention technology, specifically relating to a bridge combined multi-stage energy-consuming buffer device. Background Technology

[0002] Currently, the most widely used collision protection facilities in the field of bridge pier collision protection include freestanding collision protection facilities, fixed collision protection facilities, and self-floating collision protection facilities. Freestanding collision protection facilities can be further divided into pile groups and artificial cofferdams, etc. Their biggest feature is that the impact force of the ship does not directly act on the bridge pier, which can maximize the safety of the bridge pier. However, this type of collision protection facility can cause significant damage to ships, and the construction cost is high and it occupies navigation channels. Fixed and self-floating collision protection facilities usually adopt similar structural composition schemes. The mainstream ones currently include two main categories: steel structures and steel-coated composite material structures. Thanks to the plastic deformation capacity of steel structures, they can effectively absorb the impact energy of ships, prolong the impact time, and reduce the load on bridges and ships during the collision. However, the above-mentioned devices still reveal many application defects in current use. Among them, the steel structure is susceptible to corrosion in the water environment, resulting in a short service life and high maintenance costs. The steel-coated composite material outer composite material covering layer and the inner steel box are bonded together by adhesive process, which has low bonding strength. It is easy to peel off due to slight collisions, which accelerates the corrosion of the inner steel box. In addition, the energy-consuming components inside the box are mostly grid structures, which can easily cause excessive local stress to puncture the hull in the event of a collision, exacerbating the consequences of a collision accident. Summary of the Invention

[0003] This utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide a bridge combination multi-stage energy-consuming buffer device.

[0004] The technical solution of this utility model is: a bridge combined multi-stage energy-consuming buffer device, including a steel casing, wherein a steel partition is provided inside the steel casing to divide the space, and a primary energy-consuming structure for primary buffer energy consumption and a secondary energy-consuming structure for secondary buffer energy consumption are respectively provided in the divided space, and the steel casing is set outside the bridge pier by rubber fenders.

[0005] Furthermore, the primary energy-consuming structure includes a supporting grid, in which aluminum honeycomb is provided, and the supporting grid and aluminum honeycomb form a honeycomb-grid energy-consuming structure.

[0006] Furthermore, the secondary energy-consuming structure includes a steel grating, which is disposed between the inner wall of the steel casing and the steel partition.

[0007] Furthermore, the aluminum honeycomb is fixed to the supporting grid with adhesive to prevent the two from disintegrating during a collision.

[0008] Furthermore, a UHPC layer is provided outside the steel casing, and the UHPC layer includes a UHPC force equalization layer and a UHPC support layer.

[0009] Furthermore, the UHPC force-equalizing layer is located on the side of the steel casing away from the pier.

[0010] Furthermore, the UHPC support layer is disposed on the side of the steel casing facing the pier.

[0011] Furthermore, the UHPC support layer is provided with rubber fenders, and there are multiple rubber fenders that are firmly fixed.

[0012] Furthermore, the space of the first-level energy-consuming structure is smaller than that of the second-level energy-consuming structure.

[0013] The beneficial effects of this utility model are as follows:

[0014] Because this invention uses a UHPC panel, its structural service life is longer in complex aquatic environments and under accidental conditions such as scratches. In addition, because the exposed steel structure uses stainless steel composite steel plates, its corrosion resistance is greatly enhanced, and the life of the device is significantly improved compared with existing solutions.

[0015] In terms of impact resistance, this invention has a clear deformation mode induction mechanism. It distributes the impact force through the high-stiffness UHPC panel and buffers the impact force through the low-stiffness honeycomb. It uses UHPC and dense honeycomb to transfer the impact force to the high-strength steel grid structure, which can absorb large impact energy. The force transmission path is reasonable and can achieve coverage of low, medium and high impact resistance levels. At the same time, it increases the compression stroke of the energy-consuming components, reduces the peak impact force, has good designability, and greatly improves the energy consumption efficiency of the anti-ship collision device.

[0016] The UHPC force equalization layer, primary energy dissipation layer and secondary energy dissipation layer adopted in this utility model have clear division of labor and reasonable gradient force transmission path. The combined stiffness of the force equalization layer and primary energy dissipation layer can ensure that the secondary energy dissipation layer will not be damaged locally, thereby improving the energy absorption utilization rate of traditional grid structure.

[0017] The process solutions for each energy-consuming component in this invention are mature, and their performance is stable and controllable, minimizing the impact of the process on the device performance.

[0018] This utility model adopts a modular design concept, which can be composed of multiple units. It is prefabricated in sections, floated to the designated position, and then connected by simple means. The manufacturing and construction technology of the entire device is mature, which can ensure the construction quality of each section. Attached Figure Description

[0019] Figure 1 This is an exploded view of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of this utility model;

[0021] Figure 3 This is an installation diagram of this utility model;

[0022] Figure 4 This is a schematic diagram of the rubber fender structure in this utility model;

[0023] in:

[0024] 1 UHPC layer 2 steel casing

[0025] 3 Aluminum honeycomb 4 Steel partition

[0026] 5. Steel grating; 6. Shear studs

[0027] 7. Adhesive surface 8. Welded surface

[0028] 9. Collision protection structure 10. Bridge pier

[0029] 11 Rubber fender; 12 Pile foundation

[0030] 111 Bolt hole 112 Base

[0031] 113 high-damping rubber. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0033] like Figures 1 to 4 As shown, a bridge combined multi-stage energy dissipation buffer device includes a steel casing 2. The steel casing 2 is provided with a steel partition 4 that divides the space. The divided space is provided with a primary energy dissipation structure for primary buffer energy dissipation and a secondary energy dissipation structure for secondary buffer energy dissipation. The steel casing 2 is set outside the bridge pier 10 by a rubber fender 11.

[0034] The primary energy-consuming structure includes a support grid, in which aluminum honeycomb 3 is disposed, and the support grid and aluminum honeycomb 3 form a honeycomb-grid energy-consuming structure.

[0035] The secondary energy-consuming structure includes a steel grating 5, which is disposed between the inner wall of the steel casing 2 and the steel partition 4.

[0036] The aluminum honeycomb 3 is fixed to the supporting grid by the adhesive surface 7 to prevent the two from disintegrating during a collision.

[0037] The steel casing 2 is provided with a UHPC layer 1, which includes a UHPC force equalization layer and a UHPC support layer.

[0038] The UHPC uniform force layer is located on the side of the steel casing 2 away from the pier 10.

[0039] The UHPC support layer is located on the side of the steel casing 2 facing the pier 10.

[0040] The UHPC support layer is provided with rubber fenders 11, and there are multiple rubber fenders 11 that are firmly fixed.

[0041] The space required for the first-level energy-consuming structure is smaller than that required for the second-level energy-consuming structure.

[0042] Specifically, the steel partition 4 is parallel to the UHPC layer 1 outside the steel casing 2.

[0043] Specifically, the supporting grid in the first-level energy-consuming structure and the steel grid 5 in the second-level energy-consuming structure are fixed to the steel partition 4 by welding surface 8, and the two are located on both sides of the steel partition 4 respectively.

[0044] Specifically, the rubber fender 11 is installed on the outside of the pier 10, and the pier 10 is installed on the pile foundation 12.

[0045] Specifically, the rubber fender 11 includes bolt holes 111 through which bolts can pass, and the bolt holes 111 are arranged in the base 112. The back of the base 112 is provided with high-damping rubber 113, and the high-damping rubber 113 faces the pier 10.

[0046] Specifically, such as Figure 1 As shown, this utility model consists of, from the impact side inwards, a UHPC force equalization layer, a steel plate connection layer, a primary energy dissipation structure, a steel partition 4, a secondary energy dissipation structure, a steel plate connection layer, a UHPC support layer, and an elastic fender 11.

[0047] Specifically, the outermost UHPC force-equalizing layer is mainly made of high-performance fiber-reinforced concrete, which is high in strength and toughness. During a collision, its stiffness is used to distribute the local impact force of the ship to the internal energy-dissipating structure, avoiding local structural damage. At the same time, the high wear resistance of the UHPC force-equalizing layer prevents the impact damage to the anti-collision structure caused by floating objects and small boats.

[0048] Specifically, the steel casing 2 is integrated with the UHPC stress-equalizing layer through the design of the connecting component, namely the shear stud 6. The internal tensile stress generated by the indentation deformation near the impact point can be borne by the steel casing 2, which further improves the strength and toughness of the UHPC stress-equalizing layer, so as to transfer more impact force to the internal primary energy dissipation structure and secondary energy dissipation structure.

[0049] Specifically, the primary energy-dissipating structure consists of aluminum honeycomb 3 and supporting grid structure with the required strength in the design. The aluminum honeycomb 3 and the supporting grid are connected by adhesive to avoid disintegration during the collision process. At the same time, it overcomes the process difficulties of large-volume single honeycomb. The aluminum honeycomb 3 achieves the effect of reducing peak load through a certain pre-compression process.

[0050] Specifically, the steel partition 4 between the primary and secondary energy dissipation structures is connected to the primary and secondary energy dissipation structures by welding, effectively transferring the load of the primary energy dissipation structure to the secondary energy dissipation structure.

[0051] Specifically, the secondary energy-dissipating structure is welded from thin-walled Q235 steel plates, and the plate thickness and spacing are set according to the strength matching relationship between the primary and secondary energy-dissipating structures. The UHPC support layer consists of an inner steel plate and a UHPC back plate, which are connected to form a whole through connectors. At the same time, shear nails 6 are pre-embedded on the UHPC back plate to connect the elastic polyurethane rubber fenders 11 to the UHPC back plate.

[0052] In one implementation, except for the steel partition 4 and the energy-consuming structure, the rest of the outer steel structure is made of composite steel plates welded together.

[0053] Specifically, the construction method of this utility model includes the following steps:

[0054] First, the inner steel box of the prefabricated steel casing 2 is prefabricated into a groove shape with an open top, and the outer side of the steel box is prefabricated with connecting parts;

[0055] Then, the pre-welded primary and secondary energy-consuming structures are installed inside the trough-shaped steel box. The energy-consuming structures provide internal support for the trough-shaped structure of the internal steel box. After completion, the top plate of the trough-shaped structure is welded, making the internal steel box a sealed chamber.

[0056] Then, ultra-high performance concrete was poured by using the temporarily fixed internal steel box and the pre-set steel plate (the pre-set connector of the steel membrane on the inner support side) as the inner and outer molds.

[0057] Finally, rubber fenders 11 are installed on the support side.

[0058] As an extended example, the grid of the secondary energy dissipation structure can be a cross grid structure. Similarly, the grid can also be a circular grid or a triangular grid with equal or better strength.

[0059] As an extended example, the primary energy-dissipating structure can be a metal foam structure with high energy absorption efficiency and a small peak impact force.

[0060] Because this invention uses a UHPC panel, its structural service life is longer in complex aquatic environments and under accidental conditions such as scratches. In addition, because the exposed steel structure uses stainless steel composite steel plates, its corrosion resistance is greatly enhanced, and the life of the device is significantly improved compared with existing solutions.

[0061] In terms of impact resistance, this invention has a clear deformation mode induction mechanism. It distributes the impact force through the high-stiffness UHPC panel and buffers the impact force through the low-stiffness honeycomb. It uses UHPC and dense honeycomb to transfer the impact force to the high-strength steel grid structure, which can absorb large impact energy. The force transmission path is reasonable and can achieve coverage of low, medium and high impact resistance levels. At the same time, it increases the compression stroke of the energy-consuming components, reduces the peak impact force, has good designability, and greatly improves the energy consumption efficiency of the anti-ship collision device.

[0062] The UHPC force equalization layer, primary energy dissipation layer and secondary energy dissipation layer adopted in this utility model have clear division of labor and reasonable gradient force transmission path. The combined stiffness of the force equalization layer and primary energy dissipation layer can ensure that the secondary energy dissipation layer will not be damaged locally, thereby improving the energy absorption utilization rate of traditional grid structure.

[0063] The process solutions for each energy-consuming component in this invention are mature, and their performance is stable and controllable, minimizing the impact of the process on the device performance.

[0064] This utility model adopts a modular design concept, which can be composed of multiple units. It is prefabricated in sections, floated to the designated position, and then connected by simple means. The manufacturing and construction technology of the entire device is mature, which can ensure the construction quality of each section.

Claims

1. A multi-stage energy-dissipating buffer device for bridges, comprising a steel casing (2), characterized in that: The steel casing (2) is provided with a steel partition (4) that divides the space. The space is provided with a primary energy-consuming structure for primary buffering and a secondary energy-consuming structure for secondary buffering. The steel casing (2) is set outside the pier (10) by a rubber fender (11). The rubber fender (11) includes bolt holes (111) through which bolts can pass, and the bolt holes (111) are arranged in the base (112). The back of the base (112) is provided with high-damping rubber (113), and the high-damping rubber (113) faces the pier (10). The steel partition (4) between the primary energy-consuming structure and the secondary energy-consuming structure is connected to the primary energy-consuming structure and the secondary energy-consuming structure by welding, so as to effectively transfer the load of the primary energy-consuming structure to the secondary energy-consuming structure.

2. The bridge combined multi-stage energy dissipation buffer device according to claim 1, characterized in that: The primary energy-consuming structure includes a support grid, in which aluminum honeycomb (3) is provided. The support grid and aluminum honeycomb (3) together form a honeycomb-grid energy-consuming structure.

3. The bridge combined multi-stage energy dissipation buffer device according to claim 1, characterized in that: The secondary energy-consuming structure includes a steel grating (5), which is disposed between the inner wall of the steel casing (2) and the steel partition (4).

4. A bridge combined multi-stage energy dissipation buffer device according to claim 2, characterized in that: The aluminum honeycomb (3) is fixed to the supporting grid by the adhesive surface (7) to prevent the two from disintegrating during the collision process.

5. A bridge combined multi-stage energy-dissipating buffer device according to claim 1, characterized in that: The steel casing (2) is provided with a UHPC layer (1), which includes a UHPC force equalization layer and a UHPC support layer.

6. A bridge combined multi-stage energy dissipation buffer device according to claim 5, characterized in that: The UHPC uniform force layer is located on the side of the steel casing (2) away from the pier (10).

7. A bridge combined multi-stage energy dissipation buffer device according to claim 5, characterized in that: The UHPC support layer is located on the side of the steel casing (2) facing the pier (10).

8. A bridge combined multi-stage energy dissipation buffer device according to claim 7, characterized in that: The UHPC support layer is provided with rubber fenders (11), and there are multiple rubber fenders (11) that are firmly fixed.

9. A bridge combined multi-stage energy-dissipating buffer device according to claim 1, characterized in that: The space required for the first-level energy-consuming structure is smaller than that required for the second-level energy-consuming structure.

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