UHPC and honeycomb bridge pier composite ship collision prevention device

Abstract

The utility model discloses a UHPC and honeycomb bridge pier composite ship collision prevention device which comprises an anti-collision box, an assembly inner cavity for containing an energy dissipation structure is formed in the anti-collision box, a steel lattice for dividing the inner space of the assembly inner cavity is arranged in the assembly inner cavity, and aluminum honeycomb plates connected in series and in parallel are arranged in the steel lattice. The steel lattice and the aluminum honeycomb plate form a combined energy dissipation structure. According to the series and parallel aluminum honeycomb plate-steel lattice combined structure, the defects that a single honeycomb structure is small in size and low in total energy consumption are overcome, and the high energy absorption efficiency of the honeycomb structure and the unbalance loading resistance of a metal grid structure are coupled; and the energy absorption effect on anti-collision scenes caused by different ship tonnages, different ship bow shapes and different collision directions and angles is good. According to the utility model, a series and parallel aluminum honeycomb panel-steel lattice combined structure is adopted as an energy dissipation structure, and the structure is stable in failure mode, strong in energy dissipation capacity, clear in force transmission path and controllable in design under dynamic impact compression.

Description

Technical Field

[0001] This utility model belongs to the field of bridge pier collision protection technology, specifically relating to a composite anti-ship collision device for bridge piers using UHPC and honeycomb. 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.

[0003] In response to the application deficiencies revealed by steel structure and steel-coated composite material anti-collision facilities, some experts and scholars have proposed corresponding solutions.

[0004] Chinese Patent 202211572078.1 discloses a prefabricated, replaceable honeycomb-shaped bridge pier composite anti-collision device and its construction method. This anti-collision device includes a honeycomb composite energy-absorbing structure made of a series of polygonal fiber-reinforced composite tubes filled with energy-absorbing material, and a honeycomb reinforced concrete composite structure made of a series of polygonal steel tubes filled with concrete. The polygonal steel tubes are fixed to the side of the bridge pier by implanted expansion bolts, and the steel tubes and composite tubes in each section are assembled into a whole by connecting bolts. This patent utilizes an outer layer of composite material for energy absorption and an inner layer of reinforced concrete structure to improve structural strength, offering advantages such as high anti-collision performance. However, it has the following differences or shortcomings:

[0005] Firstly, the lifespan of the facilities is short: when polygonal steel pipes, composite energy-absorbing structures, and concrete are directly immersed in water, the lifespan of the materials is greatly reduced, resulting in a limited lifespan for the anti-collision facilities.

[0006] Secondly, the protective effect is limited: the energy-absorbing structure of this anti-collision device consists of an outermost polygonal fiber-reinforced composite pipe filled with energy-absorbing material, while the inner layers are all steel-concrete composite structures. During an impact, when the outermost energy-absorbing structure is damaged, the ship collides with the steel-concrete composite structure, which can easily damage the ship or bridge piers.

[0007] Thirdly, the factory's manufacturing efficiency is low: the steel pipes and composite pipes between different sections of the facility need to be assembled into a whole using connecting bolts. The numerous contact surfaces between the steel pipes and composite pipes, along with the complex structural form, require a large number of bolts for connection, resulting in low manufacturing efficiency.

[0008] Chinese Patent 201410215836.3 discloses a steel-concrete composite bridge anti-ship collision device and an anti-ship collision bridge. This anti-ship collision device includes an energy-dissipating component fixed to the bridge piers or abutments and a force-transmitting component. The energy-dissipating component is configured as a grid structure, primarily dissipating energy through progressive compression in the direction of the impact. The force-transmitting component includes an ultra-high performance concrete panel fixed to the outside of the energy-dissipating component, with its planar extension direction substantially perpendicular to the progressive compression direction of the grid structure. This solution effectively improves the durability of the device by using an ultra-high performance concrete panel, but the use of X-shaped steel plates as the energy-dissipating material internally limits its energy dissipation efficiency.

[0009] Chinese Patent 202111287791.7 discloses a prefabricated anti-collision device for bridge piers in waterways. This device includes multiple anti-collision pontoons arranged sequentially around the bridge pier. Each pontoon comprises a pontoon body and a connecting portion. The pontoon body is a reinforced concrete structure. An internal energy-dissipating device is installed inside the pontoon to absorb and dissipate the impact energy when the pontoon body is impacted. The internal gaps are filled with a polymer damping energy-dissipating material. A polymer collision deflection device is also installed on the outer surface of the pontoon body away from the bridge pier. The internal energy-dissipating device of this anti-collision device mainly consists of steel grating and circular steel cylinders, and its energy dissipation capacity is limited.

[0010] Therefore, it is essential to find an energy-consuming structure that is lightweight, has a clear force transmission path, high energy consumption capacity and efficiency, good corrosion resistance, and fast prefabrication speed. Summary of the Invention

[0011] In order to improve the problems of short service life, insufficient energy efficiency and complex manufacturing of mainstream steel structure and steel-coated composite material anti-collision facilities, this utility model proposes a bridge pier composite anti-ship collision device of UHPC and honeycomb.

[0012] The technical solution of this utility model is: a composite anti-ship collision device for bridge piers using UHPC and honeycomb, including an anti-collision box, wherein an assembly cavity for accommodating an energy-dissipating structure is formed inside the anti-collision box, and a steel lattice is provided in the assembly cavity to divide its internal space, wherein aluminum honeycomb panels are arranged in series and parallel within the steel lattice, and the steel lattice and aluminum honeycomb panels constitute a combined energy-dissipating structure.

[0013] Furthermore, the crash box is formed by assembling UHPC panels, with the UHPC panels enclosing an assembly cavity.

[0014] Furthermore, the steel lattice structure includes horizontal steel plates and vertical steel plates, wherein the horizontal steel plates are aligned with the impact direction of the ship, and the vertical steel plates are perpendicular to the impact direction of the ship.

[0015] Furthermore, the horizontal steel plate, the vertical steel plate, and the inner wall of the anti-collision box enclose a side energy-dissipating cavity, and an aluminum honeycomb panel is fixed in the side energy-dissipating cavity.

[0016] Furthermore, the horizontal steel plates and vertical steel plates enclose a medium-energy-consuming inner cavity, and an aluminum honeycomb panel is fixed in the medium-energy-consuming inner cavity.

[0017] Furthermore, in the energy-dissipating cavity along the direction of ship impact, the aluminum honeycomb panels filled with them are aligned along the same axis, forming a series of aluminum honeycomb panel groups.

[0018] Furthermore, in the energy-dissipating cavity on the vertical side of the ship's impact, the aluminum honeycomb panels filled with them are parallel in direction, forming a parallel aluminum honeycomb panel group.

[0019] Furthermore, the crash box includes a pre-cast and fixed bottom plate and side plates, and a post-cast and fixed top plate is provided at the openings of the bottom plate and side plates.

[0020] The beneficial effects of this utility model are as follows:

[0021] The series and parallel aluminum honeycomb panel-steel lattice combined structure proposed in this utility model solves the shortcomings of small volume and low total energy consumption of single honeycomb structure. It combines the high energy absorption efficiency of honeycomb structure with the anti-eccentric load capacity of metal lattice structure, and has a good energy absorption effect for collision protection scenarios caused by different ship tonnage, different bow shapes and different impact directions and angles.

[0022] This invention utilizes the excellent corrosion resistance and impermeability of UHPC material to protect the anti-collision structure, preventing direct contact between the honeycomb structure and the environmental medium. Its excellent wear resistance can effectively prevent floating objects or small boats from scratching and damaging the outer wall of the anti-collision device. At the same time, the cast composite structure has no risk of surface peeling, which greatly improves the service life of the anti-collision structure.

[0023] This utility model adopts a series and parallel aluminum honeycomb panel-steel lattice combined structure as an energy dissipation structure. Under dynamic impact compression, this structure can more evenly disperse the impact force, reduce stress concentration, avoid local damage that is easy to occur in traditional structures, and has a stable failure mode, strong energy dissipation capacity, clear force transmission path, and controllable design.

[0024] This utility model has a simple structure and fewer component types, making it easy for large-scale, intelligent production in factories. The solution is simple to manufacture, with the steel lattice structure made by lap welding, the aluminum honeycomb panel and the steel lattice structure bonded together by high-performance epoxy adhesive, and finally the energy-dissipating structure placed in the template to cast the UHPC shell, which can significantly reduce the construction period. Attached Figure Description

[0025] Figure 1 This is a cross-sectional view of the anti-collision box in this utility model;

[0026] Figure 2 This is a perspective view of the present invention;

[0027] Figure 3 This is a schematic diagram of the aluminum honeycomb panels connected in series in this utility model;

[0028] Figure 4 This is a schematic diagram of the parallel connection of aluminum honeycomb panels in this utility model;

[0029] in:

[0030] 1. Collision box 2. Ship

[0031] 11 UHPC panel 12 Aluminum honeycomb panel

[0032] 13. Steel lattice structure. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0034] like Figures 1 to 4 As shown, a composite anti-ship collision device for bridge piers using UHPC and honeycomb structures includes an anti-collision box 1. The anti-collision box 1 forms an assembly cavity for accommodating energy-dissipating structures. The assembly cavity is provided with a steel lattice 13 that divides its internal space. The steel lattice 13 is provided with aluminum honeycomb panels 12 connected in series and parallel. The steel lattice 13 and the aluminum honeycomb panels 12 form a combined energy-dissipating structure.

[0035] The anti-collision box 1 is formed by assembling UHPC panels 11, and the UHPC panels 11 enclose the assembly cavity.

[0036] The steel lattice 13 includes horizontal steel plates and vertical steel plates. The horizontal steel plates are aligned with the impact direction of the ship 2, and the vertical steel plates are perpendicular to the impact direction of the ship 2.

[0037] The horizontal steel plate, the vertical steel plate and the inner wall of the anti-collision box 1 form a side energy dissipation cavity, and an aluminum honeycomb panel 12 is fixed in the side energy dissipation cavity.

[0038] The horizontal and vertical steel plates enclose a medium-energy-consuming inner cavity, and an aluminum honeycomb panel 12 is fixed in the medium-energy-consuming inner cavity.

[0039] In the energy-dissipating cavity at the side of the impact direction of the ship 2, the aluminum honeycomb panels 12 are filled with the same axial direction, forming a series of aluminum honeycomb panels.

[0040] In the vertical energy dissipation cavity of the ship 2, the aluminum honeycomb panels 12 are filled with parallel axes to form a parallel aluminum honeycomb panel group.

[0041] The anti-collision box 1 includes a bottom plate and side plates that are pre-cast and fixed, and a top plate that is post-cast and fixed is provided at the openings of the bottom plate and side plates.

[0042] Specifically, the energy-consuming inner cavity is also provided with an aluminum honeycomb panel 12, the axis of which is consistent with the impact direction of the ship 2, thus forming a series aluminum honeycomb panel group with the aluminum honeycomb panels 12 in the front and rear energy-consuming inner cavities.

[0043] Specifically, the impact surface and impact force of ship 2 on the bridge pier are relatively large, and the impact energy is high. Therefore, a combination energy-dissipating structure of aluminum honeycomb panels 12 and steel lattice 13 connected in series and parallel is used to dissipate the energy.

[0044] Specifically, such as Figure 3 As shown, the series-connected aluminum honeycomb panel assembly, by connecting the aluminum honeycomb panels 12 in series, can progressively compress the honeycomb structure of different layers in multiple stages, thereby dissipating the energy generated by ship impact in multiple stages. By adjusting the number of aluminum honeycomb panels 12 connected in series and the honeycomb strength, it is possible to better match the impact scenarios of ships 2 of different tonnages.

[0045] Specifically, such as Figure 4 As shown, the parallel aluminum honeycomb panel assembly increases the contact area between the ship 2 and the aluminum honeycomb panel 12 during a collision, thus better dissipating the energy generated by the collision. By adjusting the number of aluminum honeycomb panels 12 connected in parallel, collision scenarios involving ships 2 with different pier sizes and bow shapes can be better matched.

[0046] Specifically, the aluminum honeycomb panel 12 is connected to the steel lattice 13. The steel lattice 13 has a strong resistance to eccentric loads, so the combination of series and parallel aluminum honeycomb panel groups with the steel lattice 13 also has a good energy absorption effect in collision avoidance scenarios caused by different impact directions and angles of the ship 2.

[0047] Specifically, the aluminum honeycomb panel 12 and the steel lattice 13 are bonded together with high-performance epoxy adhesive.

[0048] The manufacturing process of this utility model is as follows:

[0049] A. Determine the structural dimensions of the crash barrier.

[0050] The dimensions of the crash box 1 are determined based on the geometric shape of the bridge pier.

[0051] B. Determine the energy-dissipating structural parameters of the series and parallel aluminum honeycomb panel-steel lattice combination.

[0052] Based on the ship type data selected according to the anti-collision target of bridge piers, finite element models of series and parallel aluminum honeycomb panels-steel lattice anti-collision facilities were established. Based on the model, the strength and number of honeycomb energy-absorbing elements with the most economical and energy-efficient effect, as well as the thickness and spacing of the steel lattice were calculated.

[0053] C. Tie the reinforcing bars and fabricate serial and parallel aluminum honeycomb panel-steel lattice composite structures.

[0054] The reinforcing bars need to be processed according to the dimensions in the drawings and tied into a reinforcing mesh.

[0055] Aluminum honeycomb panels 12 and steel lattice 13 are fabricated based on the calculated optimal energy dissipation structural parameters. The steel lattice 13 is made by lap welding, and the aluminum honeycomb panels 12 and steel lattice 13 are bonded together with high-performance epoxy adhesive, combining the aluminum honeycomb panels 12 and steel lattice 13 into a series and parallel aluminum honeycomb panel-steel lattice energy dissipation structure.

[0056] D. Erecting templates

[0057] Because UHPC concrete has high fluidity, tiny gaps between formwork can cause grout leakage and other problems, affecting the uniformity and strength development of UHPC. Therefore, sealant tape or similar materials must be used to seal the joints of the formwork.

[0058] E. Pouring UHPC concrete

[0059] The steel mesh is placed, the bottom plate and side plates of the crash box 1 are poured, the series and parallel aluminum honeycomb panel-steel lattice combination structure is then placed into the crash box 1, and finally the top plate of the crash box is poured.

[0060] F. Steam curing

[0061] After the components are poured, they undergo static curing, temperature curing, and natural curing. After steam curing, the molds are removed, and the anti-ship collision device is completed.

[0062] Honeycomb structures are widely used in various buffer and energy-absorbing components due to their low relative density, high specific strength and stiffness, and excellent energy absorption capacity. Ship collisions with bridge piers involve large contact surfaces and impact forces, resulting in high impact energy. Single honeycomb structures, with their small volume and low total energy consumption, are unsuitable for this scenario. This invention proposes a series and parallel aluminum honeycomb panel-steel lattice composite structure, which overcomes the shortcomings of small volume and low total energy consumption of single honeycomb structures. It combines the high energy absorption efficiency of honeycomb structures with the anti-eccentric load capacity of metal lattice structures, demonstrating good energy absorption effects for collision scenarios involving different ship tonnages, bow shapes, and impact directions and angles.

[0063] Conventional steel-clad tanks have a short service life in aquatic environments such as rivers and oceans due to their exposed steel structure. While steel-clad composite tanks cover the steel structure with a composite layer, the composite layer is bonded to the steel structure with adhesive. Furthermore, due to the brittle nature of the composite material, even minor impacts can cause the composite layer to detach, exposing the steel structure and accelerating corrosion. This invention utilizes the excellent corrosion resistance and impermeability of UHPC material to protect the impact-resistant structure, preventing direct contact between the honeycomb structure and the environmental medium. Its excellent abrasion resistance effectively prevents damage to the outer wall of the impact-resistant device from floating debris or small boats. Simultaneously, the cast-in-place composite structure eliminates the risk of surface detachment, significantly extending the service life of the impact-resistant structure.

[0064] This utility model adopts a series and parallel aluminum honeycomb panel-steel lattice combined structure as an energy dissipation structure. Under dynamic impact compression, this structure can more evenly disperse the impact force, reduce stress concentration, avoid local damage that is easy to occur in traditional structures, and has a stable failure mode, strong energy dissipation capacity, clear force transmission path, and controllable design.

[0065] This utility model has a simple structure and fewer component types, making it easy for large-scale, intelligent production in factories. The solution is simple to manufacture, with the steel lattice structure made by lap welding, the aluminum honeycomb panel and the steel lattice structure bonded together by high-performance epoxy adhesive, and finally the energy-dissipating structure placed in the template to cast the UHPC shell, which can significantly reduce the construction period.

Claims

1. A composite anti-ship impact device of a pier of UHPC and honeycomb, comprising an anti-impact box (1), characterized in that: The anti-collision box (1) forms an assembly cavity for accommodating energy-consuming structures. The assembly cavity is provided with a steel lattice (13) that divides its internal space. The steel lattice (13) is provided with aluminum honeycomb panels (12) connected in series and parallel. The steel lattice (13) and the aluminum honeycomb panels (12) form a combined energy-consuming structure.

2. The UHPC and cellular composite pier anti-ship impact device of claim 1, wherein: The anti-collision box (1) is formed by combining UHPC panels (11), and the UHPC panels (11) enclose the assembly cavity.

3. The UHPC and cellular composite pier anti-ship impact device of claim 1, wherein: The steel lattice (13) includes a horizontal steel plate and a vertical steel plate. The horizontal steel plate is aligned with the impact direction of the ship (2), and the vertical steel plate is perpendicular to the impact direction of the ship (2).

4. The UHPC and cellular composite pier anti-ship impact device of claim 3, wherein: The horizontal steel plate, the vertical steel plate and the inner wall of the anti-collision box (1) form a side energy dissipation cavity, and an aluminum honeycomb plate (12) is fixed in the side energy dissipation cavity.

5. The UHPC and cellular composite pier anti-ship impact device of claim 4, wherein: The horizontal and vertical steel plates enclose a medium-energy-consuming inner cavity, and an aluminum honeycomb panel (12) is fixed in the medium-energy-consuming inner cavity.

6. The UHPC and cellular composite pier anti-ship impact device of claim 1, wherein: In the energy-dissipating cavity on the side of the ship (2) in the direction of impact, the aluminum honeycomb panels (12) are filled with the same axial direction, forming a series of aluminum honeycomb panels.

7. The UHPC and cellular composite pier anti-ship impact device of claim 1, wherein: In the vertical energy dissipation cavity of the ship (2) impact, the aluminum honeycomb panels (12) are filled with parallel axial directions to form a parallel aluminum honeycomb panel group.

8. The UHPC and cellular composite pier anti-ship impact device of claim 1, wherein: The anti-collision box (1) includes a bottom plate and side plates that are cast and fixed first, and a top plate that is cast and fixed later is provided at the opening of the bottom plate and side plates.

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