Bridge combined multi-stage energy dissipation buffer device

Abstract

The application discloses a bridge combined multistage energy consumption buffer device, which comprises a steel sleeve box, a steel partition plate for separating space is arranged in the steel sleeve box, a first energy consumption structure for one-stage buffer energy consumption and a second energy consumption structure for two-stage buffer energy consumption are arranged in the separated space respectively, and the steel sleeve box is arranged outside a bridge pier through a rubber fender. The UHPC panel and the stainless steel composite steel plate are adopted, and the service life of the structure is obviously prolonged under the complex service environment of water area. In terms of crashworthiness, the application has a clear deformation mode induction mechanism, the impact force is dispersed through the UHPC panel with large rigidity, the impact force is buffered through the small-rigidity honeycomb, the impact force is transmitted to the high-strength steel grid structure through the UHPC and the dense honeycomb, the energy consumption efficiency is greatly improved, the force transmission path is reasonable, the coverage of different anti-collision grades can be realized, the compression stroke of the energy consumption assembly is improved, the peak impact force is reduced, and the designability is good.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of infrastructure disaster prevention, and particularly relates to a bridge combined multi-stage energy dissipation buffer device. BACKGROUND

[0002] At present, in the field of bridge pier collision protection, the widely used anti-collision facilities include independent anti-collision facilities, fixed anti-collision facilities and self-floating anti-collision facilities. The independent anti-collision facilities can be divided into group piles and artificial cofferdams, and the biggest feature is that the ship impact force is not directly applied to the bridge pier, which can maximize the safety of the bridge pier. However, the anti-collision facilities will cause great damage to the ship, and the construction cost of the anti-collision facilities is high and occupies the navigation channel. The fixed and self-floating anti-collision facilities usually adopt approximate structure composition schemes, and the current mainstream includes two categories of steel structure and steel-covered composite material structure. The plastic deformation capacity of the steel structure can effectively absorb the ship impact energy, prolong the impact time and reduce the load borne by the bridge and the ship in the collision process. However, the above-mentioned devices still have many application defects in the current use process. The steel structure is easily corroded by the water environment, has a short service life and high maintenance cost. The adhesive strength of the adhesive process between the outer composite covering layer of the steel-covered composite material and the inner steel box is low, and the peeling phenomenon is easy to occur under slight collision, which accelerates the corrosion of the inner steel box. In addition, the energy dissipation elements in the box are mostly grid structures, which are easy to cause local stress too large to pierce the ship under collision, and aggravate the consequences of the collision accident. SUMMARY

[0003] The application is proposed to solve the problems in the prior art, and aims to provide a bridge combined multi-stage energy dissipation buffer device.

[0004] The technical scheme of the application is as follows: a bridge combined multi-stage energy dissipation buffer device, comprising a steel box, a steel partition plate is arranged in the steel box to divide the space, a first energy dissipation structure for one-stage buffer energy dissipation and a second energy dissipation structure for two-stage buffer energy dissipation are respectively arranged in the divided space, and the steel box is arranged outside the bridge pier through a rubber fender.

[0005] Further, the first energy dissipation structure comprises a support grid, and an aluminum honeycomb is arranged in the support grid to form a honeycomb-grid energy dissipation structure.

[0006] Further, the second energy dissipation structure comprises a steel grid, and the steel grid is arranged between the inner wall of the steel box and the steel partition plate.

[0007] Further, the aluminum honeycomb is fixed with the support grid through an adhesive surface to avoid disintegration of the two in the collision process.

[0008] Further, the steel sleeve box is externally provided with a UHPC layer, and the UHPC layer comprises a UHPC uniform force layer and a UHPC support layer.

[0009] Further, the UHPC uniform force layer is arranged on the side of the steel sleeve box away from the pier.

[0010] Further, the UHPC support layer is arranged on the side of the steel sleeve box towards the pier.

[0011] Further, the UHPC support layer is externally provided with rubber fenders, and the rubber fenders are firmly fixed.

[0012] Further, the space of the primary energy dissipation structure is smaller than that of the secondary energy dissipation structure.

[0013] The beneficial effects of the present application are as follows:

[0014] In the present application, the UHPC panel is used, and the service life of the structure is long under complex water service environment and accidental conditions such as scratching. In addition, the exposed steel structure uses stainless steel clad steel plate, and the corrosion resistance is greatly enhanced, and the service life of the device is significantly improved compared with the existing scheme.

[0015] In terms of crashworthiness, the present application has a clear deformation mode induction mechanism, which spreads the impact force through the UHPC panel with large rigidity, buffers the impact force through the small rigidity honeycomb, and transmits the impact force to the high-strength steel grid structure by using UHPC and dense honeycomb. It can absorb large impact energy, the force transmission path is reasonable, it can realize low, medium and high different anti-collision levels, and at the same time, the compression stroke of the energy dissipation component is improved, the peak impact force is reduced, the designability is good, and the energy dissipation efficiency of the ship collision prevention device is greatly improved.

[0016] The combination of the UHPC uniform force layer, the primary energy dissipation layer and the secondary energy dissipation layer adopted in the present application has clear division of labor, and the gradient force transmission path is reasonable. The combined rigidity of the uniform force layer and the primary energy dissipation layer can ensure that the secondary energy dissipation layer does not occur local damage, and improve the energy utilization rate of the traditional grid structure.

[0017] In the present application, the process scheme of each energy dissipation component is mature, stable and controllable, and the influence of the process on the performance of the device is minimized.

[0018] The present application adopts a modular design idea, and can be combined by multiple units. The segments are prefabricated, floated to the specified position, and then connected simply. The manufacturing and construction process of the whole device is mature, and the construction quality of each segment can be guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the exploded view of the present application;

[0020] Figure 2It is a structural schematic diagram of the application;

[0021] Figure 3 It is a schematic diagram of the installation of the application;

[0022] Figure 4 It is a structural schematic diagram of the rubber fender in the application;

[0023] Among them:

[0024] 1 UHPC layer 2 steel sleeve box

[0025] 3 aluminum honeycomb 4 steel partition

[0026] 5 steel grid 6 shear pin

[0027] 7 adhesive surface 8 welding surface

[0028] 9 anti-collision structure 10 bridge pier

[0029] 11 rubber fender 12 pile foundation

[0030] 111 bolt hole 112 base

[0031] 113 high-damping rubber. DETAILED DESCRIPTION

[0032] Hereinafter, the application will be described in detail with reference to the accompanying drawings and examples:

[0033] As Figures 1 to 4 shown, a bridge combined multi-stage energy dissipation buffer device includes a steel sleeve box 2, a steel partition 4 is arranged in the steel sleeve box 2 to separate the space, a first energy dissipation structure for one-stage buffer energy dissipation and a second energy dissipation structure for two-stage buffer energy dissipation are respectively arranged in the separated space, and the steel sleeve box 2 is arranged outside the bridge pier 10 through the rubber fender 11.

[0034] The first energy dissipation structure includes a support grid, an aluminum honeycomb 3 is arranged in the support grid, and the support grid and the aluminum honeycomb 3 constitute a honeycomb-grid energy dissipation structure.

[0035] The second energy dissipation structure includes a steel grid 5, which is arranged between the inner wall of the steel sleeve box 2 and the steel partition 4.

[0036] The aluminum honeycomb 3 is fixed with the support grid through the adhesive surface 7 to avoid disintegration of the two during the collision process.

[0037] The steel sleeve box 2 is provided with a UHPC layer 1, and the UHPC layer 1 includes a UHPC uniform force layer and a UHPC support layer.

[0038] The UHPC uniform force layer is arranged on the side of the steel sleeve box 2 away from the bridge pier 10.

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

[0040] The UHPC support layer is externally provided with rubber fenders 11, and the rubber fenders 11 are firmly fixed.

[0041] The space of the primary energy dissipation structure is smaller than that of the secondary energy dissipation structure.

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

[0043] Specifically, the support grid in the primary energy dissipation structure and the steel grid 5 in the secondary energy dissipation structure are fixed to the steel partition plate 4 through the welding surface 8, and are respectively located on both sides of the steel partition plate 4.

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

[0045] Specifically, the rubber fender 11 includes a bolt hole 111 through which a bolt can pass, and the bolt hole 111 is arranged in a 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, as shown in Figure 1 The UHPC uniform force layer, the steel plate connecting layer, the primary energy dissipation structure, the steel partition plate 4, the secondary energy dissipation structure, the steel plate connecting layer, the UHPC support layer, and the elastic fender 11 are sequentially arranged from the impact side to the inner side.

[0047] Specifically, the outermost UHPC uniform force layer is mainly made of high-performance fiber reinforced concrete, which is high-strength and high-toughness, and during the collision process, the local impact force of the ship is distributed and transmitted to the internal energy dissipation structure by using the rigidity of the UHPC uniform force layer, avoiding local damage to the structure, and the high wear resistance of the UHPC uniform force layer avoids the impact damage of the floating objects and small boats in the water to the impact-resistant structure.

[0048] Specifically, the steel jacket 2 is integrally formed with the UHPC uniform force layer through the design of the connecting piece, i.e., the shear nail 6, and the internal tensile stress near the impact point caused by the inward deformation can be borne by the steel jacket 2, so that the strength and toughness of the UHPC uniform force layer are further improved to transmit more impact force to the internal primary energy dissipation structure and secondary energy dissipation structure.

[0049] Specifically, the first energy dissipation structure is composed of aluminum honeycomb 3 and support grid structure according to the required strength of design, and the aluminum honeycomb 3 and the support grid are connected by adhesive connection to avoid disintegration in the collision process, and to overcome the process difficulty of large-volume honeycomb, and the aluminum honeycomb 3 is pre-compressed to reduce the peak load.

[0050] Specifically, the steel partition plate 4 between the first energy dissipation structure and the second energy dissipation structure is connected to the first energy dissipation structure and the second energy dissipation structure by welding, and the load of the first energy dissipation structure is effectively transmitted to the second energy dissipation structure.

[0051] Specifically, the second energy dissipation structure is welded by thin-walled Q235 steel plate, and the thickness and spacing are set according to the strength matching relationship between the first energy dissipation structure and the second energy dissipation structure. The UHPC support layer is composed of an inner steel plate and a UHPC back plate, and is formed as a whole by a connecting piece, and the shear nails 6 are pre-buried on the UHPC back plate to connect the rubber fender 11 of the elastic polyurethane to the UHPC back plate.

[0052] As an embodiment, in addition to the steel partition plate 4 and the energy dissipation structure, the remaining outer steel structure is welded by composite steel plate.

[0053] Specifically, the construction method of the application comprises the following steps:

[0054] First, the internal steel box of the prefabricated steel box 2 is first prefabricated into a groove type with an open upper end, and a connecting piece is pre-set on the outer side of the steel box;

[0055] Then, the first energy dissipation structure and the second energy dissipation structure which have been welded into shape are first arranged in the groove type steel box, and the energy dissipation structure can provide internal support for the groove type structure of the internal steel box; after completion, the groove type top plate is welded to make the internal steel box into a closed box chamber;

[0056] Then, the temporarily fixed internal steel box and the pre-set steel plate (internal support side steel film pre-set connecting piece) are used as an inner and outer mold to pour the ultra-high performance concrete;

[0057] Finally, the rubber fender 11 is installed on the support side.

[0058] As an extension, the grid of the second energy dissipation structure can be a cross grid structure, and for the same reason, the grid can also be an equal strength or more optimal strength circular grid or triangular grid.

[0059] As an extension, the first energy dissipation structure can be a metal foam structure with high energy absorption efficiency and small impact force peak.

[0060] The application has long service life of the structure under the complex service environment of water area and accidental conditions such as scratching, and in addition, the corrosion resistance of the exposed steel structure is greatly enhanced by using stainless steel clad steel plate, and the service life of the device is significantly improved compared with the existing scheme.

[0061] In terms of crashworthiness, the application has a clear deformation mode induction mechanism, which spreads the impact force through the UHPC panel with high rigidity, buffers the impact force through the small rigidity honeycomb, and transmits the impact force to the high-strength steel grid structure by using UHPC and dense honeycomb, which can absorb large impact energy, the force transmission path is reasonable, and low, medium and high different anti-collision levels can be covered, the compression stroke of the energy dissipation component is improved, the peak impact force is reduced, the designability is good, and the energy dissipation efficiency of the ship collision prevention device is greatly improved.

[0062] The combination of the UHPC force equalizing layer, the primary energy dissipation layer and the secondary energy dissipation layer adopted by the application has clear division of labor, and the gradient force transmission path is reasonable, the combined rigidity of the force equalizing layer and the primary energy dissipation layer can ensure that the secondary energy dissipation layer does not occur local damage, and the energy absorption utilization rate of the traditional grid structure is improved.

[0063] The process scheme of each energy dissipation component in the application is mature, stable and controllable, and the influence of the process on the performance of the device is minimized.

[0064] The application adopts modular design idea, which can be combined by multiple units, segmented prefabrication, floating to the specified position, and then connected through simple connection, the manufacturing and construction process of the whole device is mature, and the construction quality of each segment can be guaranteed.

Claims

1. A bridge combined multi-stage energy dissipation buffer device, comprising a steel casing (2), characterized in that: A steel partition (4) for separating the space is provided in the steel casing (2), and a primary energy dissipation structure for primary buffering and energy dissipation and a secondary energy dissipation structure for secondary buffering and energy dissipation are respectively provided in the separated spaces. The steel casing (2) is arranged outside the bridge pier (10) via a rubber fender (11); The primary energy dissipation structure comprises a supporting grid, in which an aluminum honeycomb (3) is arranged, and the supporting grid and the aluminum honeycomb (3) form a honeycomb-grid energy dissipation structure; The secondary energy dissipation structure comprises a steel grid (5), and the steel grid (5) is arranged between the inner wall of the steel casing (2) and the steel partition (4); A UHPC layer (1) is provided outside the steel casing (2), and the UHPC layer (1) comprises a UHPC force-balancing layer and a UHPC support layer.

2. The bridge-combined multi-stage energy dissipation buffer device according to claim 1 is characterized in that: The aluminum honeycomb (3) is fixed to the support grid via the adhesive surface (7), thereby preventing the two from disintegrating during a collision.

3. The bridge-combined multi-stage energy dissipation buffer device according to claim 1 is characterized in that: The UHPC force-balancing layer is arranged on a side of the steel casing (2) away from the bridge pier (10).

4. The bridge-combined multi-stage energy dissipation buffer device according to claim 1 is characterized in that: The UHPC support layer is arranged on a side of the steel casing (2) facing the bridge pier (10).

5. The bridge-combined multi-stage energy dissipation buffer device according to claim 4 is characterized in that: A rubber fender (11) is provided outside the UHPC supporting layer, and the rubber fenders (11) are multiple and firmly fixed.

6. The bridge-combined multi-stage energy dissipation buffer device according to claim 1 is characterized in that: The space of the primary energy dissipation structure is smaller than the space of the secondary energy dissipation structure.

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