CN210827249U

CN210827249U - Easily-recovered vehicle collision prevention device and vehicle collision prevention bridge

Info

Publication number: CN210827249U
Application number: CN201921299169.6U
Authority: CN
Inventors: 樊伟; 毛薇; 张志勇; 邵旭东
Original assignee: Hunan University
Current assignee: Hunan University
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2020-06-23
Anticipated expiration: 2029-08-12

Abstract

The utility model discloses an easy recovery type prevents car and hits device, panel in UHPC outer panel and the UHPC of mutual independence, the adjacent tip of panel passes through flexonics spare and connects in UHPC outer panel and the UHPC, it has the energy-absorbing subassembly to fill in the sandwich structure that panel formed in UHPC outer panel and the UHPC. The utility model also provides a prevent that the car hits the bridge, prevent that the pier department that the car hit the bridge installs foretell easy recovery type and prevents that the car hits the device, prevent that the car hits the mobile subaerial of locating of device. The utility model discloses in, the connection is not sealed to outer panel of UHPC and UHPC interior panel, mutual independence, whole panel structure belongs to the opening form, can not influence each other when the two atress warp, has realized the reuse of UHPC board, and the durability is good, and later stage maintenance replacement is with low costs.

Description

Easily-recovered vehicle collision prevention device and vehicle collision prevention bridge

Technical Field

The utility model belongs to bridge auxiliary assembly field especially relates to a device and prevent that car hits bridge are hit in car of preventing of bridge.

Background

When designing a overpass bridge, the problem of vehicle collision must be considered. After the vehicle hits the bridge, the bridge structure may be damaged or even collapsed, which causes huge economic loss, casualties and very negative social influence. It is statistical that collision is one of three major causes of bridge failure in the U.S. bridge accidents from 1951 to 2000. In recent years, many accidents that vehicles hit bridges occur in domestic. The numerous accidents caused by the collision of vehicles with bridges indicate that the improvement of the collision prevention capability of the bridges is an urgent problem to be solved worldwide.

At present, the research for improving the anti-collision capacity of a bridge generally starts from the following two aspects: (1) from the aspect of external protection, collision protection guardrails can be arranged for piers, additional collision protection devices can be added, and the arrangement of the collision protection guardrails is generally necessary under the condition that the conditions allow. (2) Research is carried out from the idea of enhancing the shock resistance of the self structure of the pier. For example, researchers have proposed reinforcing piers and FRP sheaths susceptible to impact with steel/glass Fiber Reinforced Plastic (FRP) sheaths.

The collision avoidance guardrails are arranged in actual bridge accidents, and the bridge piers are still broken by the automobile, which shows that the collision avoidance performance design of most of the collision avoidance guardrails at present can not meet the requirement of bridge protection. There are many ways to add additional crash-proof devices, which are generally made of composite materials (foamed aluminum, fiber materials, etc.), and are not mature in application at present, and have the disadvantages of large occupied space, low economy, poor durability, etc. The method for reinforcing the shock resistance of the pier by using the sheath also limits the application of the sheath in engineering practice due to the defect of the sheath material. In addition, studies have found that crash barriers or devices cannot be reused once they are impacted, which is costly.

Therefore, a novel reusable vehicle collision prevention device is a novel breakthrough.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome not enough and the defect mentioned in the above background art, provide a simple structure, good, the reuse's of durability easily recovery type prevent that the car hits the device and prevent that the car hits the bridge. In order to solve the technical problem, the utility model provides a technical scheme does:

an easily-recovered car collision prevention device comprises a UHPC outer panel and a UHPC inner panel which are independent from each other, wherein the adjacent ends of the UHPC outer panel and the UHPC inner panel are connected through a flexible connecting piece (namely the ends of the inner panel and the outer panel are in an open form, and the UHPC outer panel and the UHPC inner panel are in an unclosed structure), and an energy absorption assembly is filled in a sandwich structure formed by the UHPC outer panel and the UHPC inner panel. The utility model discloses in, flexible connection spare is the fragile component of atress, only plays the connection effect and can not bear great impact.

In the easily-recoverable vehicle collision prevention device, preferably, the energy absorption component comprises an axial tube energy dissipation material and a light energy dissipation material filler, and the axial tube energy dissipation material is arranged in the light energy dissipation material filler. The axial tube type energy dissipation material is a thin-wall metal tube with different structures, generally, the deformation mode and the energy dissipation capacity can be effectively controlled and predicted, the energy absorption capacity is strong, the energy dissipation performance is stable, the impact energy can be effectively dissipated, and the transmission direction of the impact force is clear. The adopted light energy-consuming material filler has the excellent characteristics of light weight, heat insulation, safety, shock insulation, good rebound resilience, comfort, durability, low temperature resistance and the like, has the waterproof function, can resist shock and pressure, does not crack or corrode after being cured, does not fall off, has good corrosion resistance, and can play a role in restraining the deformation direction of the axial tube energy-consuming material. By utilizing the combined action of the two components, the whole device has strong impact resistance, and when the vehicle collision preventing device is impacted, the force transmission mode is clear and definite, and the structural stability is higher. And, the utility model discloses in, utilize the tip to be the outer panel of UHPC and the panel in the UHPC of opening form, the influence of inside and outside panel to filling in its interior adsorption component is littleer, is favorable to axial tube class power consumption material and light power consumption material filler to consume the performance of ability effect more, and the structural style of inside and outside panel mutually supports with energy-absorbing component, mutual synergism, and the crashworthiness of whole car collision prevention device is more excellent.

In the easily-recoverable vehicle collision prevention device, preferably, the axial tube type energy dissipation material comprises a corrugated steel tube and a defective thin-wall round tube, and the filler of the light energy dissipation material comprises PU polyurethane foam and foam concrete.

In the easily-recoverable anti-collision device, preferably, two ends of the axial tube energy dissipation material are respectively in contact with but not fixedly connected with the UHPC outer panel and the UHPC inner panel, and two ends of the axial tube energy dissipation material are respectively perpendicular to the UHPC outer panel and the UHPC inner panel. The arrangement mode is favorable for the transmission of the impact force, is convenient for the subsequent repeated utilization of the UHPC outer panel and the UHPC inner panel, and does not need to increase the disassembly and assembly process.

In the easily-recovered vehicle collision prevention device, preferably, a buffer component is arranged on one side, away from the energy absorption component, of the UHPC inner panel. More preferably, the buffering component comprises a D-shaped rubber, and a plurality of the D-shaped rubbers are arranged side by side in the transverse direction. The existence of buffering subassembly for when UHPC inner panel contacted initial contact with the pier, can play the cushioning effect, reduce initial impact force.

In the above easily-recoverable vehicle collision prevention device, preferably, the UHPC outer panel and the UHPC inner panel are both provided with reinforcing meshes. The compressive strength of the UHPC material can reach 150-300MPa, and the compressive strength can be doubled by arranging the reinforcing mesh in the UHPC material, so that the UHPC panel has extremely high bearing capacity and can ensure the high strength and rigidity of the whole structure.

In the easily-restored vehicle collision prevention device, preferably, the end portion of the UHPC outer panel and the end portion of the UHPC inner panel are both in an L-shaped configuration, and short sides of adjacent L-shaped configurations are mutually matched to clamp the flexible connecting member. The flexible connecting piece is clamped at the short sides of the adjacent L-shaped structures, and the UHPC outer panel and the UHPC inner panel can be integrally formed on the structure, but cannot be influenced mutually when being deformed by force.

In the above easily-recoverable vehicle impact prevention device, preferably, the flexible connecting member includes a connecting wood board or a connecting wood strip. The UHPC outer panel and the UHPC inner panel are integrally formed by using the connecting wood boards or the connecting wood bars as the baffle plates, when the device is impacted, the connecting wood boards or the connecting wood bars are damaged, the deformation of the UHPC outer panel and the UHPC inner panel cannot influence each other, the panels are easy to recover, and the UHPC outer panel and the UHPC inner panel can be repeatedly used.

As a general technical idea, the utility model also provides a prevent that the car hits the bridge, prevent that the pier department that the car hit the bridge installs foretell easy recovery type and prevents that the car hits the device, prevent that the car hits the mobile subaerial of locating of device. For example, the car collision preventing device may be arranged to surround the pier in half, to hold the D-shaped rubber close to the pier, and to have the side of the half surrounding the D-shaped rubber facing the car collision direction.

The utility model provides a panel can be at the prefabricated shaping of mill in UHPC outer panel and the UHPC, and it is fixed to assemble to hoist to the engineering scene, and the shape of panel is unrestricted (all can for semi-circle, pentagon, semicircle rectangle etc. if the cross-section in UHPC outer panel and the UHPC), and the cooperation is used inside and outside the panel shape cooperate can. Then the light energy-consuming material filler is shaped according to the pre-designed shape, the hole of the axial tube energy-consuming material is reserved, the axial tube energy-consuming material is placed in the reserved hole of the filler (the reserved hole can also play a role in guiding when the axial tube energy-consuming material deforms), and the panel, the filler and the like are assembled on site. In subsequent use, the anti-collision device deforms when being impacted, if the panel is not damaged, the axial tube energy-consuming material and the filler are replaced and then are refilled, the maintenance is also very convenient, and the maintenance cost is low.

The utility model provides a prevent that car from hitting device separates UHPC outer panel and UHPC inner panel, through flexible connectors (like the plank) with axial pipe type power consumption material and light power consumption material filler parcel form wholly in inner and outer panel at the tip. When the device receives the striking, the flexible connection spare can take place to destroy the fracture, and UHPC outer panel just can separate with UHPC inner panel this moment, and the deformation can not influence each other, and inner and outer panel shape, performance resume easily, can guarantee the repeatedly usable of UHPC outer panel and UHPC inner panel to the at utmost. Compare in UHPC outer panel and UHPC inner panel closed fixed prevent the car and hit the device, the inner and outer panel closed prevent the car and hit the structure wholeness ability of device better (generally all adopt this kind of form), but, when receiving the impact deformation process, the filler between the inner and outer panel extrudees the in-process gradually, because of the inner and outer panel is fixed, receive inside filler and the mutual influence of the two, the inner and outer panel will take place to warp gradually, the part of structure will produce great bending deformation, be unfavorable for later stage used repeatedly.

The utility model discloses in utilize the outer panel of UHPC and the UHPC interior opening form structure between the panel to with utilizing its two unique mechanical properties, can also realize the reuse of panel when can satisfying the atress demand. The vehicle collision prevention device is obtained by carrying out finite element simulation calculation on the vehicle collision prevention device: 1) under the condition of vehicle impact at the same speed, the impact force peak value of the easily-recovered vehicle impact prevention device is obviously reduced compared with that without the anti-collision device, and when the anti-collision device is arranged at 50km/h, the impact force borne by a pier is reduced by about 24 percent compared with that without the anti-collision device; under the high-speed impact of 80km/h, the impact force is reduced by about 75 percent; 2) under the condition of vehicle impact at the same speed, the peak displacement ratio of the easily-recovered vehicle impact prevention device is remarkably reduced compared with that of the device without an anti-collision device, and when the vehicle speed is 50km/h, the displacement response of a bridge pier is reduced by about 46 percent; when the vehicle speed is 80km/h, the maximum displacement is reduced by about 62 percent; 3) the damage of the pier is obviously reduced after the vehicle collision prevention device is arranged, which shows that the vehicle collision prevention device has an obvious effect on improving the collision resistance of the pier column; 4) the utility model discloses a prevent that the car hits the device and adsorb rapidly, set up and prevent that the car hits the device after, striking vehicle head part warp the damage and is showing and alleviate, can effectively protect the driver and take advantage of safety, especially when the striking speed is higher the protecting effect is more showing. Generally speaking, the utility model provides a prevent that car hits device has good resistant (shock resistance) performance, good ductility, advantages such as anti-seismic performance of hitting.

Compared with the prior art, the utility model has the advantages of:

1. the utility model discloses in, the connection is not sealed to outer panel of UHPC and UHPC interior panel, mutual independence, whole panel structure belongs to the opening form, and the two atress can not influence each other when warping. If the collision-prevention device is impacted at a lower speed in use, the collision-prevention device deforms, but the UHPC panel is easy to recover, so that only the fillers such as axial pipe energy-consumption materials and the like need to be replaced and refilled, the reutilization of the UHPC panel is realized, the durability is good, and the later-stage maintenance and replacement cost is low.

2. The utility model provides a prevent that car hits device and ground do not have fixed connection, can produce the friction power consumption with ground in the striking in-process, also enable the structural deformation simultaneously and do not receive ground restraint.

3. The utility model provides a prevent that the car hits device has good resistant advantages such as hitting (shock resistance) performance, good ductility, anti-seismic performance, can effectively protect driver and passenger safety, reduces the vehicle damage simultaneously.

4. The utility model provides a prevent that car hits device and compare traditional protection, simple structure, the power consumption is efficient, and the device is small, and it is little to take up an area of the space, and the inside and outside panel shape of UHPC is unrestricted, adaptable multiple arrangement condition.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of an easy-recovery-type anti-collision device in an embodiment (the axial pipe energy dissipation material is a corrugated steel pipe).

Fig. 2 is a schematic cross-sectional view of the easy-recovery type anti-collision device in the embodiment (the axial tube type energy dissipation material is a defective thin-walled circular tube).

Fig. 3 is a schematic cross-sectional view of the easy-recovery type anti-collision device in which the inner and outer UHPC panels are semicircular in the embodiment (the axial tube type energy-consuming material is a corrugated steel tube).

Fig. 4 is a schematic cross-sectional view of the easy-recovery type anti-collision device in which the inner and outer UHPC panels are semicircular in the embodiment (the axial tube type energy-consuming material is a defective thin-walled circular tube).

Fig. 5 is a schematic cross-sectional view of the easy-recovery type anti-collision device in which the inner and outer UHPC panels in the embodiment are semicircular rectangles (the axial tube type energy-consuming material is a corrugated steel tube).

Fig. 6 is a schematic cross-sectional view of the easy-recovery type anti-collision device in which the inner and outer UHPC panels are semi-circular rectangles in the embodiment (the axial tube type energy-consuming material is a defective thin-walled circular tube).

Fig. 7 is a plan view of the recovery-type collision prevention device of fig. 1 installed at a pier.

Fig. 8 is a front view of the recovery-type collision preventing device of fig. 1 installed at a pier.

Illustration of the drawings:

1. a UHPC outer panel; 2. a UHPC inner panel; 3. a flexible connector; 4. an energy absorbing assembly; 41. axial tube energy-consuming materials; 42. a lightweight energy dissipating material filler; 5. a buffer assembly; 6. a bridge pier; 7. a ground surface; 8. a bearing platform.

Detailed Description

To facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.

Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by an existing method.

Example (b):

as shown in fig. 1 and 2, the easily recoverable vehicle collision preventing device of the present embodiment includes an UHPC outer panel 1 and an UHPC inner panel 2 that are movably disposed on the ground and are independent of each other, adjacent ends of the UHPC outer panel 1 and the UHPC inner panel 2 are connected by a flexible connecting member 3 (a connecting wood plate), the cross-sectional shapes of the UHPC outer panel 1 and the UHPC inner panel 2 are pentagons (unsealed pentagons), and a sandwich structure formed by the UHPC outer panel 1 and the UHPC inner panel 2 is filled with an energy absorbing assembly 4.

In this embodiment, the energy absorbing assembly 4 comprises an axial tube dissipative material 41 and a lightweight dissipative material filler 42, the axial tube dissipative material 41 being embedded in the lightweight dissipative material filler 42. Two ends of the axial tube energy dissipation material 41 are respectively in contact with but not fixedly connected with the UHPC outer panel 1 and the UHPC inner panel 2, and two ends of the axial tube energy dissipation material 41 are respectively perpendicular to the UHPC outer panel 1 and the UHPC inner panel 2.

In this embodiment, specifically, the energy dissipation material 41 in the form of axial tube includes corrugated steel tube (as shown in fig. 1) and defective thin-walled circular tube (as shown in fig. 2), and the filler 42 in the form of light energy dissipation material includes PU polyurethane foam.

In this embodiment, a cushioning component 5 is disposed on a side of the UHPC inner panel 2 remote from the energy absorbing component 4. Specifically, the buffer assembly 5 comprises two pieces of D-shaped rubber which are arranged side by side in the transverse direction.

In this embodiment, both the UHPC outer panel 1 and the UHPC inner panel 2 are provided with reinforcing meshes.

In this embodiment, the end of the UHPC outer panel 1 and the end of the UHPC inner panel 2 are both in an "L" shape, and the short sides of adjacent "L" shape are mutually matched to be used for clamping the flexible connector 3.

As shown in fig. 3 to 6, in the present embodiment, the shape of the UHPC outer panel 1 and the UHPC inner panel 2 is not limited. Specifically, as shown in fig. 3 to 4, the UHPC outer panel 1 and the UHPC inner panel 2 are semicircular in shape, and as shown in fig. 5 to 6, the UHPC outer panel 1 and the UHPC inner panel 2 are semicircular in shape and rectangular in shape.

As shown in fig. 7-8, the present embodiment further provides a car crash prevention bridge, which includes a bearing platform 8 and a pier 6 located in the bearing platform 8, wherein the pier 6 is installed with a car crash prevention device of the easily recoverable type as shown in fig. 1, the car crash prevention device is movably disposed on the ground 7 and semi-surrounds the pier 6, and one side of the semi-surrounding faces the car crash direction. According to the actual requirement, the collision-proof device can be arranged around the bridge pier 6.

In this embodiment, the easily recoverable vehicle collision prevention device installed in the vehicle collision prevention bridge may be any one or more of fig. 2 to 6, which is determined according to actual requirements of a field.

Compared with a fixed anti-collision device with the end parts of the UHPC outer panel 1 and the UHPC inner panel 2 fixedly connected (for example, fixedly connected by adopting a steel plate), the easy-recovery type anti-collision device (with the end part in an opening form) in the embodiment has more excellent performance, and the specific experimental data are as follows:

(1) under the condition of vehicle impact with the same speed (50 km/h), when the easily-recovered vehicle impact prevention device in the embodiment is arranged, the peak impact force borne by the bridge pier is reduced by about 24 percent compared with the situation that the anti-collision device is not arranged; when the fixed anti-collision device is arranged, the peak impact force borne by the pier is not reduced but increased by about 87.5 percent compared with the peak impact force borne by the pier without the anti-collision device.

(2) Under the condition of vehicle impact with the same speed (50 km/h), when the easily-recovered vehicle impact prevention device in the embodiment is arranged, the peak displacement of the bridge pier is obviously reduced compared with the situation that the anti-collision device is not arranged, and the displacement response is reduced by about 46 percent; and when the fixed anti-collision device is arranged, the maximum displacement is reduced by about 37.5 percent.

Claims

1. The easily-recovered car collision prevention device is characterized by comprising an UHPC outer panel (1) and an UHPC inner panel (2) which are independent from each other, wherein the adjacent end parts of the UHPC outer panel (1) and the UHPC inner panel (2) are connected through a flexible connecting piece (3), and an energy absorption assembly (4) is filled in a sandwich structure formed by the UHPC outer panel (1) and the UHPC inner panel (2).

2. The easy-to-recover anti-collision device according to claim 1, wherein the energy absorbing assembly (4) comprises an axial tube-like energy dissipating material (41) and a lightweight energy dissipating material filler (42), the axial tube-like energy dissipating material (41) being embedded in the lightweight energy dissipating material filler (42).

3. The easily recoverable vehicle collision prevention device according to claim 2, wherein two ends of the axial tube energy dissipation material (41) are respectively in contact with but not fixedly connected with the UHPC outer panel (1) and the UHPC inner panel (2), and two ends of the axial tube energy dissipation material (41) are respectively perpendicular to the UHPC outer panel (1) and the UHPC inner panel (2).

4. The vehicle collision-proof device of claim 2, wherein the axial tube-like energy dissipating material (41) comprises a corrugated steel tube and a defective thin-walled circular tube, and the lightweight energy dissipating material filler (42) comprises PU polyurethane foam and foam concrete.

5. A vehicle impact protection device of the easily recoverable type according to any of claims 1 to 4, wherein said UHPC inner panel (2) is provided with a cushioning assembly (5) on the side remote from the energy absorbing assembly (4).

6. The recovery-type bump preventing device according to claim 5, wherein the cushion member (5) comprises a plurality of D-shaped rubbers arranged laterally side by side.

7. The easily recoverable vehicle impact protection device according to any of claims 1 to 4, wherein a steel mesh is provided in both the UHPC outer panel (1) and the UHPC inner panel (2).

8. Easy recovery type anti-collision device according to any one of claims 1 to 4, characterized in that the end of the UHPC outer panel (1) and the end of the UHPC inner panel (2) are both in an "L" shaped configuration, and the short sides of adjacent "L" shaped configurations cooperate to provide for snapping the flexible connector (3).

9. Easy recovery type anti-collision device according to any one of claims 1 to 4, characterised in that the flexible connection (3) comprises a connection wooden plate or a connection wooden strip.

10. A vehicle collision prevention bridge, characterized in that an easy-recovery vehicle collision prevention device as claimed in any one of claims 1 to 9 is installed at a pier (6) of the vehicle collision prevention bridge, and the vehicle collision prevention device is movably arranged on the ground (7).