CN115094807B - Glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy and manufacturing method thereof - Google Patents
Glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy and manufacturing method thereof Download PDFInfo
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- CN115094807B CN115094807B CN202210558098.7A CN202210558098A CN115094807B CN 115094807 B CN115094807 B CN 115094807B CN 202210558098 A CN202210558098 A CN 202210558098A CN 115094807 B CN115094807 B CN 115094807B
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- energy dissipation
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- 239000003365 glass fiber Substances 0.000 title claims abstract description 87
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 104
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims abstract description 92
- 239000003733 fiber-reinforced composite Substances 0.000 claims abstract description 66
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 229920006253 high performance fiber Polymers 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 239000002131 composite material Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000004744 fabric Substances 0.000 claims description 60
- 239000011347 resin Substances 0.000 claims description 37
- 229920005989 resin Polymers 0.000 claims description 37
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 24
- 229920002554 vinyl polymer Polymers 0.000 claims description 24
- 239000003292 glue Substances 0.000 claims description 20
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- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 229920001971 elastomer Polymers 0.000 claims description 13
- 238000000465 moulding Methods 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 9
- 229920002635 polyurethane Polymers 0.000 claims description 9
- 239000004814 polyurethane Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 229920000728 polyester Polymers 0.000 claims description 7
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
- E01F15/08—Continuous barriers extending along roads or between traffic lanes essentially made of walls or wall-like elements ; Cable-linked blocks
- E01F15/081—Continuous barriers extending along roads or between traffic lanes essentially made of walls or wall-like elements ; Cable-linked blocks characterised by the use of a specific material
- E01F15/086—Continuous barriers extending along roads or between traffic lanes essentially made of walls or wall-like elements ; Cable-linked blocks characterised by the use of a specific material using plastic, rubber or synthetic materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/36—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and impregnating by casting, e.g. vacuum casting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The invention relates to a glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy and a manufacturing method thereof, wherein the glass fiber reinforced viaduct anti-collision wall comprises the following assembled structure: the outermost layer is steel structure, be provided with the steel guardrail and the combined material energy dissipation anticollision part that are used for the energy dissipation as structural support in the steel structure, combined material energy dissipation anticollision part includes one deck high performance fiber reinforced composite material layer, is filled with energy dissipation closed cell sandwich material in high performance fiber reinforced composite material layer, is provided with the fiber reinforced composite material energy dissipation body in energy dissipation closed cell sandwich material, the fiber reinforced composite material energy dissipation body transversely runs through energy dissipation closed cell sandwich material. Compared with the prior art, the fiber reinforced composite material has better mechanical strength, so that the surface layer is not easy to damage, and meanwhile, the protection device is basically maintenance-free in the daily use process due to the high weather resistance of the composite material.
Description
Technical Field
The invention belongs to the technical field of building structures, and particularly relates to a glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy and a manufacturing method thereof.
Background
At present, more and more viaduct guard rails are put into use or are being built. And accidents that the vehicle impacts the bridge guardrail occur due to errors of drivers, insufficient prevention work, insufficient supervision and the like. Under the action of the impact load of the vehicle, the displacement of the pier top can lead the track irregularity of the impact position to be enhanced, and the horizontal response of the bridge guardrail becomes an excitation source of the axle power action. These all bring adverse effects to the safe operation and life of bridge guardrails, leave disastrous accident hidden trouble, even directly threaten train driving safety, thereby cause huge life and property loss. From the analysis of materials, the guardrails mainly comprise a steel guardrail and a concrete guardrail at present, and the concrete guardrail is generally adopted as a viaduct beam. The guardrails made of two materials have advantages and disadvantages, wherein the concrete guardrails are large in size and are important loads for viaduct beams, the steel guardrails are less used in viaduct bridges, and serious accidents are mainly worried that vehicles rush out of the guardrails.
At present, the bridge guardrail mainly prevents vehicles from rushing out of a bridge, belongs to rigid physical isolation, does not have buffering energy dissipation members in the impact process, and protects the vehicles poorly.
Disclosure of Invention
The invention aims to provide a glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy and a manufacturing method thereof.
The aim of the invention can be achieved by the following technical scheme:
the invention provides a glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy, which comprises the following assembled structure: the outermost layer is steel structure, be provided with the steel guardrail and the combined material energy dissipation anticollision part that are used for the energy dissipation as structural support in the steel structure, combined material energy dissipation anticollision part includes one deck high performance fiber reinforced composite material layer, is filled with energy dissipation closed cell sandwich material in high performance fiber reinforced composite material layer, is provided with the fiber reinforced composite material energy dissipation body in energy dissipation closed cell sandwich material, the fiber reinforced composite material energy dissipation body transversely runs through energy dissipation closed cell sandwich material.
In one embodiment of the invention, the energy-dissipating closed cell sandwich material is a polyurethane material.
In one embodiment of the invention, the steel guard rail is square in structure.
In one embodiment of the invention, a plurality of fiber reinforced composite energy dissipaters are arranged in parallel.
In one embodiment of the invention, 8 fiber reinforced composite energy dissipaters are provided.
In one embodiment of the invention, the fiber reinforced composite energy dissipater is a cylindrical structure.
In one embodiment of the invention, the fiber reinforced composite energy dissipater is a composite of fiberglass cloth and vinyl vacuum infusion resin.
In one embodiment of the present invention, the high performance fiber reinforced composite layer is a composite of fiberglass cloth and vinyl vacuum infusion resin.
The invention further provides a manufacturing method of the glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy, which comprises the following steps:
(1) And (3) manufacturing a mould: a die for manufacturing the energy dissipation anti-collision component, wherein the energy dissipation anti-collision component comprises a high-performance fiber reinforced composite material layer; energy dissipation closed cell sandwich material and fiber reinforced composite energy dissipater in the high performance fiber reinforced composite layer;
(2) Spraying gel coats and paving impact face glass fibers: the bottom surface and the two adjacent side surfaces of the die are sprayed by adopting traffic red vinyl gel coats, and a reinforcing body glass fiber cloth 20 layer is paved after the gel is formed, wherein the bottom surface of the die is an impact surface of an energy dissipation anti-collision part;
(3) Energy-consuming closed cell sandwich material filling: coating a reinforcing body glass fiber cloth 10 layer on the outer surface of a prepared energy-dissipation closed cell material block, embedding the energy-dissipation closed cell material block coated with the reinforcing body glass fiber cloth into a die cavity, and adjusting a gap, wherein a space for forming an energy dissipation body of the fiber reinforced composite material is reserved in the prepared energy-dissipation closed cell material block, and the reinforcing body glass fiber cloth is placed in the reserved space for forming the energy dissipation body of the fiber reinforced composite material;
(4) Paving and pre-gluing a die back collision surface reinforcement glass fiber cloth: a layer of demolding cloth is paved on the back collision surface of the mould paved with the reinforcement glass fiber cloth, a layer of flow guide net is paved, then the mould is sealed by a vacuum bag film, a sealing belt is adopted between the vacuum bag film and the mould, a glue injection pipe and a suction pipe are respectively inserted into a glue injection opening and a suction opening, wherein the back collision surface of the mould is the back surface of an energy dissipation anti-collision part;
(5) Vacuum introducing and forming: vacuum introducing pre-prepared vinyl into a resin injection container, inserting a rubber inlet pipe into the resin container, loosening a valve of an air inlet pipe, and automatically introducing the vinyl into a mold cavity;
(6) Demolding, checking and assembling: demolding after complete solidification, namely uniformly rotating a demolding screw rod during demolding, and uniformly ejecting the product out of the mold cavity; and assembling according to the structure of the glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy, so as to obtain the glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy.
In one embodiment of the present invention, in step (1), the method for manufacturing a mold for a fiber reinforced composite energy absorber comprises: adopting a wood pattern process to manufacture, wherein R10 is taken as the radius of the non-injected round angle, and the demoulding taper is calculated as 1%; the material mould is demoulded after being solidified and maintained on the female mould for 48 hours, putty and other impurities on the surface of the mould are removed, the mould is washed clean by water, and the washed mould is polished by artificial water sand paper.
In one embodiment of the present invention, in the step (2), the reinforcing body glass fiber cloth is selected from any one of polyester fiber surface felt, chopped strand mat and biaxial cloth.
In one embodiment of the invention, in the step (2), the thickness of the gel coat is 0.4-0.5 mm, and the gel time of the gel coat is 30-40 minutes; when the reinforced glass fiber cloth is paved after the cementing, the reinforced glass fiber cloth should be paved flatly, and the corner bending position can be shaped by using shaping glue to prevent rebound phenomenon.
In one embodiment of the present invention, in the step (3), the reinforcing body glass fiber cloth is selected from any one of polyester fiber surface felt, chopped strand mat and biaxial cloth.
In one embodiment of the present invention, in the step (3), the overlapping portion of the reinforcing body glass fiber cloth and the reinforcing body glass fiber cloth is connected using a setting glue.
In the step (4), the valve of the rubber inlet pipe is closed for sealing performance test, and the vacuum pump is started, so that the evacuation pressure reaches-0.1 MPa, and the test is qualified.
In one embodiment of the present invention, in the step (5), the vacuum introduction molding time is 2 to 6 hours and the molding temperature is 20 to 25 ℃.
In one embodiment of the present invention, in the step (5), the vinyl vacuum introducing resin is additionally added with a UV-531 ultraviolet absorber for aging resistance.
In one embodiment of the present invention, in the step (5), the vinyl vacuum introducing resin may be added with traffic red paste as required.
In one embodiment of the present invention, in step (5), each of the exhaust pipes is inspected, if each of the exhaust pipes has resin, the vacuum introducing process is completed, the rubber inlet pipe valve is closed to keep the vacuum negative pressure state, and the vacuum pump is turned off to wait for curing when the resin gel is observed, if the resin starts to gel.
In one embodiment of the invention, in the step (6), the surface is visually inspected for defects, and the surface has a Babbitt hardness of 45 or more.
The traditional concrete overhead bridge anti-collision wall belongs to rigid physical isolation, and no buffering energy dissipation member exists in the impact process, so that the protection of vehicles is poor. The invention structurally takes the steel guardrail as a main bearing member and is formed by assisting with a high-performance fiber reinforced composite material, a fiber reinforced composite material energy dissipation body, an energy dissipation closed cell sandwich material and the like, so that the novel glass fiber reinforced viaduct anti-collision wall with a certain buffering and energy absorption effect and high energy dissipation efficiency is formed.
The composite energy dissipation anti-collision part structure of the invention except the steel covered structure and the steel guard rail consists of a high-performance fiber reinforced composite material layer, an energy dissipation closed cell sandwich material and a fiber reinforced composite material energy dissipation body, and is manufactured by one-step molding through a vacuum introduction process. The glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy can resist instant impact force when large vehicles collide, has good mechanical strength for fiber reinforced composite materials when small vehicles scratch, so that the surface layer is not easy to damage, and meanwhile, due to the high weather resistance of the composite materials, the protection device is basically maintenance-free in daily use.
The invention aims to improve the traditional concrete guardrails and steel guardrails, so that the full-closed design of the concrete guardrails is absorbed in appearance, and the psychological pressure of a running vehicle is reduced. Structurally, the novel guardrail with a certain buffering and energy absorbing effect is formed by taking a steel structure frame as a main bearing member and assisting in forming the novel guardrail by high-performance composite materials, buffering and energy absorbing members, polyurethane materials and the like. Once collision occurs, the collision time can be prolonged, the collision force can be reduced, and the double protection effect of the vehicle-bridge can be realized.
Compared with the prior art, the invention has the beneficial effects that:
1. the fiber reinforced composite material has excellent corrosion resistance, and can resist corrosion in various severe environments such as river water, lake water, sea water and the like, wherein the service life of the fiber reinforced composite material can reach decades.
2. The composite material surface layer is made of the reinforcing fibers and the matrix resin, and can exert the deformation energy absorption effect to the maximum effect according to the anisotropic characteristic of the composite material.
3. According to the invention, through deformation crushing and tearing of the energy dissipation structure, the direction of the vehicle is pulled, so that the impacting vehicle can keep more kinetic energy, and a small part of impacting energy is absorbed by the bridge, so that the impacting force can be effectively dispersed, and the impacting force is reduced.
4. The impact surface tensile strength of the invention can reach above 350MPa, the tensile modulus can reach above 16GPa, the breaking elongation is above 1.5%, the flat compression modulus of the internally filled closed-cell polyurethane material is above 3MPa, the density is above 60kg/m < 3 >, the anti-collision and mechanical properties of the invention are effectively ensured, and the energy dissipation effect can reach 22.5% -31% compared with a control group without an anti-collision wall in impact test and finite element analysis.
Drawings
Fig. 1 is a schematic diagram of the internal structure of a glass fiber reinforced overpass anti-collision wall capable of efficient energy dissipation.
Detailed Description
Referring to fig. 1, the invention provides a glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy, which has an assembly structure as follows: the outermost layer is steel structure 1, be provided with steel guardrail 2 and the combined material energy dissipation anticollision part that is used for the energy dissipation as structural support in the steel structure 1, combined material energy dissipation anticollision part includes one deck high performance fiber reinforced composite layer 3, is filled with energy dissipation closed cell sandwich material 4 in high performance fiber reinforced composite layer 3, is provided with fiber reinforced composite energy dissipation body 5 in energy dissipation closed cell sandwich material 4, the energy dissipation body 5 transversely runs through energy dissipation closed cell sandwich material 4.
Wherein the energy-consumption closed-cell sandwich material is a polyurethane material. The steel guardrail is of a square structure. The number of the fiber reinforced composite material energy dissipaters is 8, and the fiber reinforced composite material energy dissipaters are arranged in parallel. The fiber reinforced composite energy dissipater is of a cylindrical structure. The fiber reinforced composite energy dissipater is a composite material of glass fiber cloth and vinyl vacuum lead-in resin. The high-performance fiber reinforced composite material layer is a composite material of glass fiber cloth and vinyl vacuum introducing resin.
The invention further provides a manufacturing method of the glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy, which comprises the following steps of:
(1) And (3) manufacturing a mould: a die for manufacturing the energy dissipation anti-collision component, wherein the energy dissipation anti-collision component comprises a high-performance fiber reinforced composite material layer; energy dissipation closed cell sandwich material and fiber reinforced composite energy dissipater in the high performance fiber reinforced composite layer;
(2) Spraying gel coats and paving impact face glass fibers: the bottom surface and the two adjacent side surfaces of the die are sprayed by adopting traffic red vinyl gel coats, and a reinforcing body glass fiber cloth 20 layer is paved after the gel is formed, wherein the bottom surface of the die is an impact surface of an energy dissipation anti-collision part;
(3) Energy-consuming closed cell sandwich material filling: coating a reinforcing body glass fiber cloth 10 layer on the outer surface of a prepared energy-dissipation closed cell material block, embedding the energy-dissipation closed cell material block coated with the reinforcing body glass fiber cloth into a die cavity, and adjusting a gap, wherein a space for forming an energy dissipation body of the fiber reinforced composite material is reserved in the prepared energy-dissipation closed cell material block, and the reinforcing body glass fiber cloth is placed in the reserved space for forming the energy dissipation body of the fiber reinforced composite material;
(4) Paving and pre-gluing a die back collision surface reinforcement glass fiber cloth: a layer of demolding cloth is paved on the back collision surface of the mould paved with the reinforcement glass fiber cloth, a layer of flow guide net is paved, then the mould is sealed by a vacuum bag film, a sealing belt is adopted between the vacuum bag film and the mould, a glue injection pipe and a suction pipe are respectively inserted into a glue injection opening and a suction opening, wherein the back collision surface of the mould is the back surface of an energy dissipation anti-collision part;
(5) Vacuum introducing and forming: vacuum introducing pre-prepared vinyl into a resin injection container, inserting a rubber inlet pipe into the resin container, loosening a valve of an air inlet pipe, and automatically introducing the vinyl into a mold cavity;
(6) Demolding, checking and assembling: demolding after complete solidification, namely uniformly rotating a demolding screw rod during demolding, and uniformly ejecting the product out of the mold cavity; and assembling according to the structure of the glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy, so as to obtain the glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy.
In one embodiment of the present invention, in the step (1), the method for manufacturing the mold of the fiber reinforced composite energy absorber comprises: adopting a wood pattern process to manufacture, wherein R10 is taken as the radius of the non-injected round angle, and the demoulding taper is calculated as 1%; the material mould is demoulded after being solidified and maintained on the female mould for 48 hours, putty and other impurities on the surface of the mould are removed, the mould is washed clean by water, and the washed mould is polished by artificial water sand paper.
In one embodiment of the present invention, in the step (2), the reinforcing body glass fiber cloth is selected from any one of polyester fiber surface felt, chopped strand mat and biaxial cloth. In the step (2), the thickness of the gel coat is 0.4-0.5 mm, and the gel time of the gel coat is 30-40 minutes; when the reinforced glass fiber cloth is paved after the cementing, the reinforced glass fiber cloth should be paved flatly, and the corner bending position can be shaped by using shaping glue to prevent rebound phenomenon.
In one embodiment of the present invention, in the step (3), the reinforcing body glass fiber cloth is selected from any one of polyester fiber surface felt, chopped strand mat and biaxial cloth. In the step (3), the lap joint of the reinforcement glass fiber cloth and the reinforcement glass fiber cloth is connected by using setting glue.
In the step (4), the valve of the rubber inlet pipe is closed for sealing performance test, and the vacuum pump is started, so that the evacuation pressure reaches-0.1 MPa, and the test is qualified.
In one embodiment of the present invention, in the step (5), the vacuum introduction molding time is 2 to 6 hours and the molding temperature is 20 to 25 ℃. In the step (5), a UV-531 ultraviolet absorber is additionally added into the vinyl vacuum introducing resin for aging resistance. In the step (5), the vinyl vacuum introducing resin can be added with traffic red paste according to requirements. In the step (5), each exhaust pipe is checked, if each exhaust pipe has resin, the vacuum introduction process is completed, the rubber inlet pipe valve is closed to keep in a vacuum negative pressure state, and if the resin gel is observed, the vacuum pump can be turned off to wait for solidification.
In one embodiment of the invention, in the step (6), the surface is visually inspected for defects, and the surface has a Babbitt hardness of 45 or more.
The invention will now be described in detail with reference to the drawings and specific examples.
Example 1:
the embodiment is a preparation method of a glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy, which comprises the following steps of.
(1) And (3) manufacturing a mould: the female die of the energy dissipation anti-collision component of the anti-collision wall composite material is manufactured by adopting a wood die process, R10 is taken as the radius of the un-injected round angle, and the demoulding taper is calculated according to 1 percent; curing and maintaining the material mold on the female mold for 48 hours, demolding, removing putty, putty and other impurities on the surface of the mold, washing with water, and polishing the washed mold with artificial water sand paper; wherein the energy dissipating anti-collision component comprises a high-performance fiber reinforced composite material layer; energy dissipation closed cell sandwich material and fiber reinforced composite energy dissipater in the high performance fiber reinforced composite layer;
(2) Spraying gel coats and paving impact face glass fibers: the bottom surface of the die (wherein the bottom surface of the die is the collision surface of the energy dissipation and anti-collision part) and the adjacent two side surfaces are sprayed by adopting traffic red vinyl gel coats, the thickness of the gel coats is 0.4-0.5 mm, and the gel time of the gel coats is 30-40 minutes; after the gelatinization, 20 layers of polyester fiber surface felt and chopped strand mats are paved, wherein the surface felt and the chopped strand mats are paved flatly, and a corner bending position can be shaped by using shaping glue to prevent rebound;
(3) Energy-consuming closed cell sandwich material filling: coating 10 layers of reinforcement glass fiber cloth on the outer surface of a prepared energy-dissipation closed-cell material block, connecting the lap joint of the reinforcement glass fiber cloth and the reinforcement glass fiber cloth by using setting glue, burying the energy-dissipation closed-cell material block coated with the reinforcement glass fiber cloth into a die cavity, and adjusting a gap, wherein a space for forming an energy dissipation body of the fiber reinforced composite material is reserved in the prepared energy-dissipation closed-cell material block, and the reinforcement glass fiber cloth is placed in the reserved space for forming the energy dissipation body of the fiber reinforced composite material;
(4) Back-collision surface glass fiber laying and pre-glue feeding: a layer of demolding cloth is paved on the mould surface paved with the fibers (the back collision surface of the mould is the back surface of the energy dissipation anti-collision part), a layer of flow guide net is paved, then the mould surface is sealed by a vacuum bag film, a sealing belt is adopted between the vacuum bag film and the mould, and a glue injection pipe and a suction pipe are respectively inserted into a glue injection port and a suction port; closing a valve of the rubber inlet pipe for sealing performance test, and starting a vacuum pump, wherein the evacuation pressure reaches-0.1 MPa, so that the test is qualified;
(5) Vacuum introducing and forming: vacuum introducing pre-prepared vinyl containing UV-531 ultraviolet absorbent into resin injection container, and adding traffic red paste into resin according to requirement; inserting a rubber inlet pipe into a resin container, loosening a valve of an air inlet pipe, automatically introducing resin into a mold cavity, checking each exhaust pipe, if each exhaust pipe has resin, finishing a vacuum introducing process, closing the rubber inlet pipe valve to continuously maintain a vacuum negative pressure state, observing the condition of resin gel, if the resin starts to gel, turning off a vacuum pump to wait for solidification, setting the molding time to be 4 hours, and setting the molding temperature to be 20 ℃;
(6) Demolding, checking and assembling: demolding after complete curing, wherein the demolding screw is uniformly rotated during demolding, and the product is uniformly ejected out of the mold cavity; and (3) visually inspecting the surface without defects, wherein the detected surface has the Babbitt hardness of more than or equal to 45, and assembling according to the final structure shown in the figure 1 to obtain the glass fiber reinforced viaduct anti-collision wall.
The advantages of this embodiment are: the novel guardrail with a certain buffering and energy absorbing effect is formed by taking a steel structure frame as a main bearing member and assisting in forming the novel guardrail by high-performance composite materials, buffering and energy absorbing members, polyurethane materials and the like. Once collision occurs, the collision time can be prolonged, the collision force can be reduced, and the double protection effect of the vehicle-bridge can be realized.
In the process of a vehicle-bridge collision experiment and finite element simulation analysis, the glass fiber reinforced viaduct anti-collision wall prepared by the embodiment can realize that the vehicle displacement is reduced from 714mm without the anti-collision wall to 536mm during collision, thereby achieving 31% energy dissipation effect.
The glass fiber reinforced viaduct anti-collision wall prepared by the embodiment can be applied to the field of viaduct car-bridge protection.
Example 2:
the embodiment is a preparation method of a glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy, which comprises the following steps of.
(1) And (3) manufacturing a mould: the female die of the energy dissipation anti-collision component of the anti-collision wall composite material is manufactured by adopting a wood die process, R10 is taken as the radius of the un-injected round angle, and the demoulding taper is calculated according to 1 percent; curing and maintaining the material mold on the female mold for 48 hours, demolding, removing putty, putty and other impurities on the surface of the mold, washing with water, and polishing the washed mold with artificial water sand paper; wherein the energy dissipating anti-collision component comprises a high-performance fiber reinforced composite material layer; energy dissipation closed cell sandwich material and fiber reinforced composite energy dissipater in the high performance fiber reinforced composite layer;
(2) Spraying gel coats and paving impact face glass fibers: the bottom surface of the die (the bottom surface of the die is the collision surface of the energy dissipation and anti-collision part) and the adjacent two side surfaces are sprayed by adopting traffic red vinyl gel coats, the thickness of the gel coats is 0.4-0.5 mm, and the gel time of the gel coats is 30-40 minutes; after the gelatinization, a biaxial cloth 20 layer is paved, which is required to be paved flatly, and a corner eight bending position can be shaped by using shaping glue to prevent rebound phenomenon;
(3) Energy-consuming closed cell sandwich material filling: coating 10 layers of reinforcement glass fiber cloth on the outer surface of a prepared energy-dissipation closed-cell material block, connecting the lap joint of the reinforcement glass fiber cloth and the reinforcement glass fiber cloth by using setting glue, burying the energy-dissipation closed-cell material block coated with the reinforcement glass fiber cloth into a die cavity, and adjusting a gap, wherein a space for forming an energy dissipation body of the fiber reinforced composite material is reserved in the prepared energy-dissipation closed-cell material block, and the reinforcement glass fiber cloth is placed in the reserved space for forming the energy dissipation body of the fiber reinforced composite material;
(4) Back-collision surface glass fiber laying and pre-glue feeding: a layer of demolding cloth is paved on the mould surface paved with the fibers (the back collision surface of the mould is the back surface of the energy dissipation anti-collision part), a layer of flow guide net is paved, then the mould surface is sealed by a vacuum bag film, a sealing belt is adopted between the vacuum bag film and the mould, and a glue injection pipe and a suction pipe are respectively inserted into a glue injection port and a suction port; closing a valve of the rubber inlet pipe for sealing performance test, and starting a vacuum pump, wherein the evacuation pressure reaches-0.1 MPa, so that the test is qualified;
(5) Vacuum introducing and forming: vacuum introducing pre-prepared vinyl containing UV-531 ultraviolet absorbent into resin injection container, and adding traffic red paste into resin according to requirement; inserting a rubber inlet pipe into a resin container, loosening a valve of an air inlet pipe, automatically introducing resin into a mold cavity, checking each exhaust pipe, if each exhaust pipe has resin, finishing a vacuum introducing process, closing the rubber inlet pipe valve to continuously maintain a vacuum negative pressure state, observing the condition of resin gel, if the resin starts to gel, turning off a vacuum pump to wait for solidification, setting the molding time to be 4 hours, and setting the molding temperature to be 20 ℃;
(6) Demolding, checking and assembling: demolding after complete curing, wherein the demolding screw is uniformly rotated during demolding, and the product is uniformly ejected out of the mold cavity; and (3) visually inspecting the surface without defects, wherein the detected surface has the Babbitt hardness of more than or equal to 45, and assembling according to the final structure shown in the figure 1 to obtain the glass fiber reinforced viaduct anti-collision wall.
The advantages of this embodiment are: the novel guardrail with a certain buffering and energy absorbing effect is formed by taking a steel structure frame as a main bearing member and assisting in forming the novel guardrail by high-performance composite materials, buffering and energy absorbing members, polyurethane materials and the like. Once collision occurs, the collision time can be prolonged, the collision force can be reduced, and the double protection effect of the vehicle-bridge can be realized.
In the experiment of vehicle-bridge collision and finite element simulation analysis, the glass fiber reinforced viaduct anti-collision wall prepared by the embodiment can reduce the vehicle displacement from 986mm without the anti-collision wall to 690mm during collision, thereby achieving the energy dissipation effect of 28.3%.
The glass fiber reinforced viaduct anti-collision wall prepared by the embodiment can be applied to the field of viaduct car-bridge protection.
In the above-described embodiment, a finite element analysis was performed on the vehicle-bridge impact test, and an actual impact test was performed on the basis of this. The fiber reinforced composite material and the energy dissipation closed cell sandwich material (namely the closed cell polyurethane material) of the energy dissipation anti-collision component of the anti-collision wall composite material are tested for mechanical properties, so that the tensile strength of an impact face can reach more than 350MPa, the tensile modulus can reach more than 16GPa, the breaking elongation is more than 1.5%, and the flat compression modulus and the density of the internally filled closed cell polyurethane material are more than 3MPa and 60kg/m 3 The anti-collision and mechanical properties of the invention are effectively ensured. The fiber reinforced composite material adopted by the invention is glass fiber and has excellent corrosion resistanceCan ensure good weather resistance under severe working conditions.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (4)
1. A method for manufacturing a glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy is characterized in that,
the glass fiber reinforced viaduct anti-collision wall assembly structure capable of efficiently dissipating energy comprises the following components: the outermost layer is a steel covered structure, a steel guardrail serving as a structural support and a composite energy dissipation and anti-collision component for dissipating energy are arranged in the steel covered structure, the composite energy dissipation and anti-collision component comprises a layer of high-performance fiber reinforced composite material layer, energy dissipation closed cell sandwich materials are filled in the high-performance fiber reinforced composite material layer, fiber reinforced composite energy dissipaters are arranged in the energy dissipation closed cell sandwich materials, and the fiber reinforced composite energy dissipaters transversely penetrate through the energy dissipation closed cell sandwich materials;
the energy-consumption closed-cell sandwich material is a polyurethane material;
the fiber reinforced composite material energy dissipater is provided with a plurality of energy dissipaters and is arranged in parallel;
the fiber reinforced composite energy dissipater is of a cylindrical structure;
the fiber reinforced composite energy dissipater is a composite material of glass fiber cloth and vinyl vacuum introducing resin;
the high-performance fiber reinforced composite material layer is a composite material of glass fiber cloth and vinyl vacuum introducing resin;
the manufacturing method of the glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy comprises the following steps of:
(1) And (3) manufacturing a mould: a die for manufacturing the energy dissipation anti-collision component, wherein the energy dissipation anti-collision component comprises a high-performance fiber reinforced composite material layer; energy dissipation closed cell sandwich material and fiber reinforced composite energy dissipater in the high performance fiber reinforced composite layer;
(2) Spraying gel coats and paving impact face glass fibers: the bottom surface and the two adjacent side surfaces of the die are sprayed by adopting traffic red vinyl gel coats, and reinforcement glass fiber cloth is paved after the gel is formed, wherein the bottom surface of the die is an impact surface of an energy dissipation anti-collision part;
(3) Energy-consuming closed cell sandwich material filling: coating reinforcing body glass fiber cloth on the outer surface of a prepared energy-dissipation closed-cell material block, embedding the energy-dissipation closed-cell material block coated with the reinforcing body glass fiber cloth into a die cavity, and adjusting a gap, wherein a space for forming an energy dissipation body of the fiber reinforced composite material is reserved in the prepared energy-dissipation closed-cell material block, and the reinforcing body glass fiber cloth is placed in the reserved space for forming the energy dissipation body of the fiber reinforced composite material;
(4) Paving and pre-gluing a die back collision surface reinforcement glass fiber cloth: a layer of demolding cloth is paved on the back collision surface of the mould paved with the reinforcement glass fiber cloth, a layer of flow guide net is paved, then the mould is sealed by a vacuum bag film, a sealing belt is adopted between the vacuum bag film and the mould, a glue injection pipe and a suction pipe are respectively inserted into a glue injection opening and a suction opening, wherein the back collision surface of the mould is the back surface of an energy dissipation anti-collision part;
(5) Vacuum introducing and forming: vacuum introducing pre-prepared vinyl into a resin injection container, inserting a rubber inlet pipe into the resin container, loosening a valve of an air inlet pipe, and automatically introducing the vinyl into a mold cavity;
(6) Demolding, checking and assembling: demolding after complete solidification, and uniformly ejecting the product out of the mold cavity; and assembling according to the structure of the glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy, so as to obtain the glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy.
2. The method for manufacturing the glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy according to claim 1, wherein in the step (2), the reinforcement glass fiber cloth is selected from any one of polyester fiber surface felt, chopped strand mat and biaxial cloth;
in the step (3), the reinforced glass fiber cloth is selected from any one of polyester fiber surface felt, chopped strand mat and biaxial cloth.
3. The method for manufacturing the glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy according to claim 1, wherein in the step (5), the vacuum introducing molding time is 2-6 hours, and the molding temperature is 20-25 ℃.
4. The method for manufacturing the glass fiber reinforced viaduct anti-collision wall capable of efficiently dissipating energy according to claim 1, wherein in the step (5), a UV-531 ultraviolet absorber is additionally added to the vinyl vacuum introducing resin for aging resistance.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH408092A (en) * | 1964-02-12 | 1966-02-28 | Ehrlich Mauritius | Guardrail |
| WO2013097198A1 (en) * | 2011-12-30 | 2013-07-04 | 南京工业大学 | Anti-impact device of damping and energy-absorbing type made from web-enhanced composite material |
| CN103993567A (en) * | 2014-05-26 | 2014-08-20 | 郑州大学 | Energy-absorbing road traffic combined anti-collision pier and building method thereof |
| CN211735049U (en) * | 2019-10-24 | 2020-10-23 | 南昌大学 | Be applied to precast FRP anticollision barrier that turns to of prestressed concrete bridge roof beam |
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- 2022-05-19 CN CN202210558098.7A patent/CN115094807B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH408092A (en) * | 1964-02-12 | 1966-02-28 | Ehrlich Mauritius | Guardrail |
| WO2013097198A1 (en) * | 2011-12-30 | 2013-07-04 | 南京工业大学 | Anti-impact device of damping and energy-absorbing type made from web-enhanced composite material |
| CN103993567A (en) * | 2014-05-26 | 2014-08-20 | 郑州大学 | Energy-absorbing road traffic combined anti-collision pier and building method thereof |
| CN211735049U (en) * | 2019-10-24 | 2020-10-23 | 南昌大学 | Be applied to precast FRP anticollision barrier that turns to of prestressed concrete bridge roof beam |
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