CN111101458A - Height limiting protection frame with energy absorption and buffering functions - Google Patents
Height limiting protection frame with energy absorption and buffering functions Download PDFInfo
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- CN111101458A CN111101458A CN201911349347.6A CN201911349347A CN111101458A CN 111101458 A CN111101458 A CN 111101458A CN 201911349347 A CN201911349347 A CN 201911349347A CN 111101458 A CN111101458 A CN 111101458A
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- 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
- E01F13/00—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/042—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with carbon fibres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2300/00—Characterised by the use of unspecified polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
- C08J2361/04—Condensation polymers of aldehydes or ketones with phenols only
- C08J2361/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/06—Unsaturated polyesters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
Abstract
The invention belongs to the field of traffic infrastructure, and particularly relates to a height limiting protection frame with an energy absorption and buffering function, which comprises: the cross beam is supported on the two upright posts on the two sides of the road in a crossing way; the two inclined struts are respectively and obliquely arranged on the back surfaces of the two upright posts; the middle inside the cross beam is a round pipe or a square pipe, and the round pipe or the square pipe is arranged along the axial direction of the cross beam; a plurality of stiffening ribs are uniformly arranged along the circumference of the round pipe or the square pipe; the energy-absorbing buffer material is filled in the round tube or the square tube, and the energy-absorbing buffer material is wrapped outside the round beam; the round pipe or the square pipe and the stiffening rib are made of composite materials; and a first stop block and a second stop block are arranged at one side of the top of the upright column close to the road along the periphery of the joint of the cross beam and the upright column. The height-limiting protection frame has the advantages of light weight, high strength, energy absorption and buffering and simple installation, can consume energy generated by the impact of an ultrahigh motor vehicle, and reduces the probability of casualties caused by the collapse of the cross beam as far as possible.
Description
Technical Field
The invention belongs to the field of traffic infrastructure, and particularly relates to a height limiting protection frame with an energy absorption and buffering function.
Background
When a railway or a highway bridge, a culvert, a canal, a thermal pipeline and other facilities cross the highway, in order to prevent motor vehicles running on the highway from impacting the facilities due to the super height and ensure the structural safety of the facilities, a height-limiting protective frame is generally arranged at a certain distance from the facilities.
The existing height-limiting protection frame is formed by welding round steel pipes, channel steel or I-shaped steel and other section steels, and the structure type of the protection frame is roughly as follows:
(1) single rod-type crossbeam structure. The crossbeam of the height limiting frame is made of section steel, the stand columns on two sides are single columns, and the crossbeam and the stand columns are welded or bolted, so that the height limiting frame is generally suitable for the conditions of small height limitation and narrow road surface width.
(2) Vertical truss-like crossbeam structure. The cross beam of the height limiting frame is a single vertical truss, the upright columns on two sides are single columns, the back surface of each upright column is provided with an inclined strut to increase the longitudinal bending rigidity of the upright column, and the cross beam and the upright columns are welded or bolted, so that the height limiting frame is generally suitable for the conditions of height limitation and large road surface width.
(3) Horizontal truss-like crossbeam structure. The cross beam of the height limiting frame is a single horizontal truss, the upright posts on two sides are double posts, two single posts of each upright post correspond to the chord members of the horizontal truss, and the single posts are connected in a transverse connection mode. The cross beam and the upright post are welded or bolted, and are generally suitable for the conditions of limited height and large road surface width.
When an ultrahigh motor vehicle collides with a height-limiting protective frame, the following three failure modes generally exist:
the first is that the height-limiting protective frame has enough strength and rigidity to resist the impact of the motor vehicle, so that the motor vehicle is damaged. The upper part of the double-layer bus is cut by the height-limiting protective frame for multiple times in China, so that accidents of personnel injury are caused;
the second is that the strength of the connecting part of the height-limiting protective frame is insufficient, and the cross beam collapses under the impact of the motor vehicle. The beam made of a steel structure is heavy, so that when the beam is hit on a motor vehicle, the motor vehicle is damaged, and personnel in a cab are injured;
the third is that the energy of the motor vehicle collision is large, the strength of the height limiting frame or the connecting part thereof is insufficient, the motor vehicle cannot be effectively prevented, and the motor vehicle collides buildings such as bridges and culverts with the surplus speed after damaging the height limiting protective frame, and particularly when the motor vehicle collides a railway bridge, the running safety of the railway is seriously threatened.
The purpose of the design and the arrangement of the existing height-limiting protection frame is only to protect the structural safety of a protected building, and the safety of personnel on a motor vehicle is not considered. It is made of steel structure, and although the strength and rigidity are large, the weight is also large. When the motor vehicle collides with the height-limiting protection frame, potential energy generated by the mass and the speed of the motor vehicle is completely borne by the height-limiting protection frame, the height-limiting protection frame has no energy-absorbing and buffering functions and can only bear passively, and once the potential energy is not borne, the motor vehicle collapses to cause personal injury or death or cannot be prevented from colliding buildings such as bridges and culverts.
In view of the defects that the existing height-limiting protection frame has no energy absorption and buffering functions, is easy to cause casualties after being collapsed and the like, a novel height-limiting protection frame needs to be developed, the height of a passing motor vehicle is warned to be out of limit, energy generated by the impact of the ultrahigh motor vehicle is consumed, and the probability of the casualties caused by the collapse of the cross beam is reduced as far as possible.
Disclosure of Invention
In order to solve the above problems, the present invention provides a height-limiting protection frame with energy-absorbing and buffering functions, wherein a beam of the height-limiting protection frame is of a single-rod structure, and is made of fiber reinforced composite materials, and is wrapped and filled with energy-absorbing and buffering materials, so as to fully utilize the characteristics of light weight, high strength and energy-absorbing and buffering of the fiber reinforced composite materials.
The purpose of the invention is realized by the following technical scheme:
a height-limiting protection frame with an energy-absorbing and buffering function comprises a cross beam, two stand columns and two inclined struts, wherein the cross beam transversely supports the two stand columns on two sides of a road, and the bottom ends of the stand columns are fixed on a bottom foundation through anchoring bolts; the two inclined struts are obliquely arranged on the back vehicle surfaces of the two stand columns respectively and are perpendicular to the plane formed by the cross beam and the stand columns, the top ends of the inclined struts are connected with the stand columns, and the bottom ends of the inclined struts are fixed on a bottom foundation through anchoring bolts;
the middle inside the cross beam is a round pipe or a square pipe, and the round pipe or the square pipe is arranged along the axial direction of the cross beam; a plurality of stiffening ribs are uniformly arranged along the circumference of the round pipe or the square pipe, each stiffening rib is arranged along the axial direction of the cross beam, and the length of each stiffening rib is equal to the clear distance W between two upright posts; the energy-absorbing buffer material is filled in the round tube or the square tube, and the energy-absorbing buffer material is wrapped outside the round beam;
the round pipe or the square pipe and the stiffening rib are made of composite materials; the composite material is a multiphase material generated by a reinforcing material and a base material, wherein the reinforcing material is any one of glass fiber, basalt fiber or carbon fiber, the base material is any one of unsaturated polyester resin, vinyl resin, epoxy resin, polyurethane resin or phenolic resin, and the forming process of generating the composite material by the reinforcing material and the base material is any one of winding, die pressing, vacuum infusion, pultrusion or resin transfer molding;
a first stop block and a second stop block are arranged on one side of the top of the upright column close to the road along the periphery of the joint of the cross beam and the upright column, and the first stop block and the second stop block are both arranged close to the stiffening rib; the number of the first stop blocks is equal to that of the stiffening ribs, and the first stop blocks are distributed in the advancing direction of the stiffening ribs rotating towards the vehicle-facing direction; the number of the second stop blocks is 1-2, and the second stop blocks are located in the advancing direction of the stiffening ribs rotating towards the direction of the back surface of the car.
Furthermore, the cross section of the stiffening rib is T-shaped, and an upper top plate of the T-shaped stiffening rib is fixedly attached to the outer wall of the round pipe or the square pipe through a rivet; or the stiffening ribs are in the shape of a plate bar and are integrally formed with the round pipe or the square pipe.
Further, the energy-absorbing buffer material is any one of foamed plastic and foamed metal.
Furthermore, the bottom end of the upright post is provided with an upright post base plate, and the anchoring bolt penetrates through the upright post base plate to connect the upright post with the bottom foundation; and a vertically arranged lower stiffening plate is uniformly arranged along the periphery of the bottom of the upright column and is connected with the bottom of the upright column and the upright column base plate.
The bottom of bracing is equipped with the bracing bed plate, the anchor bolt passes the bracing bed plate is connected the bracing with the bottom basis.
Furthermore, the cross section of the upright post is any one of a circular shape, a rectangular shape and an I-shaped shape with an equal section, and concrete is poured inside the upright post.
Furthermore, round holes are formed in the top of the upright post along the transverse direction of the upright post, the geometric dimension of each round hole corresponds to that of the round pipe of the cross beam, and the end part of the round pipe penetrates through the round holes and is exposed out of the outer side of the upright post;
or the top of the upright post is provided with a rectangular hole along the transverse direction, the geometric dimension of the rectangular hole corresponds to that of the cross beam square tube, and the end part of the square tube penetrates through the rectangular hole and is exposed outside the upright post;
the top of the vehicle-facing surface and the top of the vehicle-backing surface of the upright post are both provided with vertically arranged upper stiffening plates.
Furthermore, the top of the upright post is provided with a tenon by welding or bolting on one side close to the road, the cross section of the tenon is in a circular or square ring shape, the inner diameter of the tenon is the same as the outer diameters of the circular tube and the square tube, and the circular tube and the square tube are inserted into the tenon.
Furthermore, the top of stand is equipped with the shrouding, crossbeam pipe or square pipe tip with the joint line between the stand adopts the sealant shutoff.
Further, the density of the composite material is 1900-2100 kg/m3。
Further, the clear distance W between the two upright columns is equal to the width of a road surface limit; and the distance H from the lower surface of the cross beam to the road surface is equal to the design limit height.
The invention has the beneficial effects that:
according to the height-limiting protection frame with the energy absorption and buffering functions, the round pipe or the square pipe and the stiffening rib are made of the composite material, and the round pipe or the square pipe is filled with the energy absorption and buffering material, and the round pipe and the stiffening rib are coated with the energy absorption and buffering material. The composite material has light weight and the density of 1900kg/m3～2100kg/m3(ii) a Strength ofThe tensile strength of the continuous glass fiber reinforced polyurethane pultrusion profile can reach 1200 MPa; the elastic modulus is small, generally not more than 50GPa, about one fourth of the elastic modulus of the steel material of 210GPa, and the deformation is larger under the same external force. The composite material has the function of energy absorption and buffering, and for example, the front bumper is made of the composite material in the field of automobile industry. When the front of motor vehicles such as container trucks and the like impact the cross beam, the round pipe or the square pipe and the stiffening rib bend and deform together, and the energy-absorbing buffer material is extruded, and the composite material and the energy-absorbing buffer material act together to absorb the potential energy of the motor vehicles and have a buffer effect on the potential energy. When motor vehicles such as a cement tank truck and the like impact the cross beam in an inclined upward direction at a certain angle, the cross beam rotates towards the vehicle-facing surface except that the round pipe or the square pipe and the stiffening rib jointly bend and deform and extrude the energy-absorbing buffer material, and the stiffening rib further extrudes the outer-coated energy-absorbing buffer material, so that the potential energy of the motor vehicles is absorbed to the maximum extent, and the impact of the motor vehicles is buffered.
In addition, even if the cross beam is damaged by collision and collapses, the probability of personal injury is reduced to the maximum extent due to the light weight of the cross beam.
Therefore, the height-limiting protection frame has the advantages of light weight, high strength, energy absorption and buffering and simple installation, has the function of warning the height of passing motor vehicles to be out of limit, can consume energy generated by the impact of ultrahigh motor vehicles, and reduces the probability of casualties caused by the collapse of the cross beam as far as possible.
Drawings
Fig. 1 is a schematic front structural view of a height limiting protection frame with an energy absorbing and buffering function in embodiment 1 of the present invention;
fig. 2 is a schematic side view of a height-limiting protection frame with an energy-absorbing and buffering function according to embodiment 1 of the present invention;
FIG. 3 is a schematic cross-sectional view of C-C of FIG. 1;
fig. 4 is a schematic cross-sectional structure view of the cross beam in embodiment 1 of the present invention;
FIG. 5 is a schematic view of the cross-sectional structure E-E of FIG. 1;
FIG. 6 is a partial schematic view of the connection between the cross beam and the column in embodiment 1 of the present invention;
fig. 7 is a schematic front structural view of a height limiting protection frame with an energy absorbing and buffering function according to embodiment 3 of the present invention;
FIG. 8 is a schematic side view of a height-limiting protection frame with energy-absorbing and buffering functions according to embodiment 3 of the present invention;
FIG. 9 is a schematic cross-sectional view of C-C of FIG. 7;
FIG. 10 is a partial schematic view of the connection between the cross beam and the vertical column in embodiment 3 of the present invention;
FIG. 11 is a schematic cross-sectional view of the stiffening rib in the form of a slab and integrally formed with the circular tube according to embodiment 1 of the present invention;
fig. 12 is a schematic cross-sectional structural view of the cross beam with a square tube in the middle according to embodiments 2 and 4 of the present invention;
FIG. 13 is a schematic cross-sectional view of the stiffener in the form of a plate and integrally formed with the square pipe according to examples 2 and 4 of the present invention;
FIG. 14 is a schematic view of the deformation of the cross member when the front of the motor vehicle impacts the cross member;
fig. 15 is a schematic view of the deformation of the cross member when the motor vehicle hits the cross member obliquely upward at an angle.
Wherein, 1-crossbeam, 11-round tube, 12-stiffening rib, 13-rivet, 14-energy-absorbing buffer material, 15-square tube; 2-upright posts, 21-upright post base plates, 22-first stop blocks, 23-second stop blocks, 24-upper stiffening plates, 25-lower stiffening plates, 26-sealing plates and 27-tenons; 3-diagonal brace, 31-diagonal brace base plate; 4-anchoring bolts; w is the clear distance between two upright columns, and H is the distance from the lower surface of the cross beam to the road surface; arrow f-vehicle-facing side, arrow b-vehicle-backing side; t-vehicle impact surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-2, a height-limiting protection frame with energy-absorbing and buffering functions comprises a cross beam 1, two upright posts 2 and two inclined struts 3, wherein the cross beam 1 transversely penetrates through the two upright posts 2 supported on two sides of a road, and the bottom ends of the upright posts 2 are fixed on a bottom foundation through anchor bolts 4; two bracing 3 slope respectively and set up at the back of the body face of a car of two stands 2, and perpendicular to crossbeam 1 with the plane that stand 2 is constituteed, the top of bracing 3 with the stand links to each other, the bottom of bracing 3 is passed through anchor bolt 4 and is fixed on the basis of the bottom.
The clear distance W between the two upright posts 2 is equal to the road surface limit width; the distance H from the lower surface of the cross beam 1 to the road surface is equal to the design limit height. The arrangement of the height-limiting protection frame must meet the building clearance requirement specified in JTG B01-2014 highway engineering technical standard.
The cross section of the upright post 2 is any one of a circular, rectangular and I-shaped cross section, and the upright post with the cross section being the circular cross section is selected in the embodiment.
As shown in fig. 2, 4 and 6, a round tube 11 is arranged in the middle of the inside of the cross beam 1, and the round tube 11 is arranged along the axial direction of the cross beam 1; a plurality of stiffening rib 12 is followed 11 a week of pipe is evenly arranged, promptly the cross section of crossbeam 1 is gear form, stiffening rib 12 is radial equidistant range, follows in this embodiment 11 a week of pipe evenly arranges 6 stiffening rib 12. The cross section of the stiffening rib 12 can be T-shaped, and the upper top plate of the T-shaped stiffening rib is arc-shaped and is attached and fixed on the outer wall of the circular tube 11 through a rivet 13; or as shown in fig. 11, the stiffening ribs 12 are in the shape of a slab and are integrally formed with the circular tube 11. Every stiffening rib 12 all arranges along 1 axial of crossbeam, stiffening rib 12 length is less than 11 length of pipe, just the length of stiffening rib 12 equals between two stands 2 net distance W, and the reason is the pipe 11 will pass stand 2, stiffening rib 12 does not pass stand 2, but hugs closely on the stand 2 is close to the outer wall of one side in the way can. Correspondingly, round holes are transversely formed in the tops of the upright columns 2, the geometric dimensions of the round holes correspond to those of the beam round tubes 11, the end portions of the round tubes 11 penetrate through the round holes, enough length is exposed out of the outer sides of the upright columns 2, and the round holes are used for preventing the beam 1 from deforming excessively and separating from the upright columns 2 under the impact of a motor vehicle.
As shown in fig. 2 and 6, a first stopper 22 and a second stopper 23 are arranged on the top of the upright post 2 near one side of the road along the periphery of the joint of the cross beam 1 and the upright post 2, and both the first stopper 22 and the second stopper 23 are arranged to be closely attached to the stiffening rib 12. The number of the first stoppers 22 is equal to that of the stiffening ribs 12, and the first stoppers are distributed in the advancing direction of the stiffening ribs 12 rotating towards the vehicle-facing surface f, so as to prevent the beam 1 from rotating towards the vehicle-facing surface f. The number of the second stop blocks 23 is 1-2, and the second stop blocks are positioned in the advancing direction of the stiffening rib 12 rotating towards the direction of the back vehicle surface b, so that the position of the cross beam 1 is limited, and the rotation of the cross beam is avoided during normal use.
As shown in fig. 2 and 6, the top portions of the vehicle-facing surface and the vehicle-backing surface of the upright post 2 are respectively provided with an upper stiffening plate 24 which is vertically arranged, so as to make up for the insufficient strength and rigidity of the upright post due to the arrangement of the transverse round holes.
As shown in fig. 5, the bottom end of the upright column 2 is provided with an upright column base plate 21, a plurality of bolt holes are uniformly formed along the periphery of the upright column base plate 21, and the anchor bolts 4 penetrate through the upright column base plate 21 to connect the upright column 2 with a bottom foundation. In order to reduce the concentrated stress at the root of the upright column, vertically arranged lower stiffening plates 25 are uniformly arranged along the periphery of the bottom of the upright column 2, and the lower stiffening plates 25 are connected with the bottom of the upright column 2 and the upright column base plate 21.
The column base plate 21 with the column bottom sets up the principle similarly, the bottom of bracing 3 is equipped with bracing base plate 31, anchor bolt 4 passes bracing base plate 31 is connected bracing 3 with the bottom basis.
As shown in fig. 1, 2 and 6, the top end of the column 2 is provided with a sealing plate 26 to prevent rainwater from flowing into the column. And the connecting gap between the end part of the beam circular tube 11 or the square tube 15 and the upright post 2 is sealed by sealant.
Preferably, concrete is poured into the upright post 2, the elevation of the top surface of the poured concrete is the same as the elevation below the round hole at the top of the upright post, and the aim is to assist the upright post in resisting bending load.
As shown in fig. 4, the round tube 11 is filled with an energy-absorbing and buffering material 14, and the energy-absorbing and buffering material 14 is further wrapped around the beam 1. The energy absorbing and buffering material 14 is any one of, but not limited to, foamed plastic and foamed metal, wherein the foamed plastic may be foamed polyurethane. The cross section of the energy-absorbing and buffering material 14 which is wrapped outside can be a regular polygon or a circle according to the number of the stiffening ribs 12, and the whole cross section of the beam is wrapped outside by the energy-absorbing and buffering material 14 in the embodiment to be a regular hexagon.
The circular tube 11 and the stiffening ribs 12 are both made of composite materials; the composite material is a multiphase material generated by adopting a special forming process through a reinforcing material and a base material, wherein the reinforcing material is any one of glass fiber, basalt fiber or carbon fiber, the base material is any one of unsaturated polyester resin, vinyl resin, epoxy resin, polyurethane resin or phenolic resin, and the forming process for generating the composite material through the reinforcing material and the base material is any one of winding, die pressing, vacuum infusion, pultrusion or resin transfer molding.
Example 2
The present embodiment is different from embodiment 1 in that:
as shown in fig. 12, a square tube 15 is arranged in the middle of the inside of the cross beam 1, and the square tube 15 is arranged along the axial direction of the cross beam 1. A plurality of stiffening rib 12 is followed 15 a week of square pipe is evenly arranged, and every stiffening rib 12 all arranges along 1 axial of crossbeam, just the length of stiffening rib 12 equals the clear distance W between two stands 2. The square tube 15 is filled with energy-absorbing buffer materials 14, and the energy-absorbing buffer materials 14 are wrapped outside the beam 1 along one circle. The cross section of the outer-wrapped energy-absorbing buffer material 14 can be polygonal or regular polygonal according to the number of the stiffening ribs 12, for example, in the embodiment, 4 stiffening ribs 12 are arranged along four sides of the square pipe 15, and the energy-absorbing buffer material 14 wraps the whole cross section of the beam into a square.
The square tube 15 and the stiffening rib 12 are both made of the composite material described in example 1.
The cross section of the stiffening rib 12 is T-shaped, and the upper top plate of the T-shaped stiffening rib is flat and is attached and fixed on the outer wall of the square pipe 15 through a rivet 13; or the stiffening ribs 12 are in the shape of a plate strip and are integrally formed with the square tubes 15.
Correspondingly, 2 tops of stand are equipped with the rectangular hole along its transversely, rectangular hole geometric dimension with crossbeam side pipe 15 is corresponding, 15 tip on the side pipe pass the rectangular hole and be in 2 outsides on the stand expose.
The elevation of the top surface of the concrete poured inside the upright post 2 is the same as the elevation below the round hole at the top of the upright post.
Example 3
The present embodiment is different from embodiment 1 in that:
the cross section of the upright post 2 is rectangular, the top of the upright post is not provided with a hole along the transverse direction, but a tenon 27 is arranged on one side of the top of the upright post 2 close to the road through welding or bolting, the cross section of the tenon 27 is circular, the inner diameter of the tenon 27 is the same as the outer diameter of the circular pipe 11, and the circular pipe 11 is inserted into the tenon 27 during field installation. The tenon 27 must have a sufficient length to prevent the cross member 1 from deforming excessively away from the pillar 2 upon impact of the motor vehicle. The first stopper 22 and the second stopper 23 are arranged as before. The upper stiffener plate 24 may not be provided at this time, as shown in fig. 7 to 10.
Example 4
The present embodiment is different from embodiment 1 in that:
as shown in fig. 12, a square tube 15 is arranged in the middle of the inside of the cross beam 1, and the square tube 15 is arranged along the axial direction of the cross beam 1. A plurality of stiffening rib 12 is followed 15 a week of square pipe is evenly arranged, and every stiffening rib 12 all arranges along 1 axial of crossbeam, just the length of stiffening rib 12 equals the clear distance W between two stands 2. The square tube 15 is filled with energy-absorbing buffer materials 14, and the energy-absorbing buffer materials 14 are wrapped outside the beam 1 along one circle. The cross section of the outer-wrapped energy-absorbing buffer material 14 can be polygonal or regular polygonal according to the number of the stiffening ribs 12, for example, in the embodiment, 4 stiffening ribs 12 are arranged along four sides of the square pipe 15, and the energy-absorbing buffer material 14 wraps the whole cross section of the beam into a square.
The square tube 15 and the stiffening rib 12 are both made of the composite material described in example 1.
The cross section of the stiffening rib 12 is T-shaped, and the upper top plate of the T-shaped stiffening rib is flat and is attached and fixed on the outer wall of the square pipe 15 through a rivet 13; or the stiffening ribs 12 are in the shape of a plate strip and are integrally formed with the square tubes 15.
The top of the upright post 2 is not provided with a hole along the transverse direction, but a tenon 27 is arranged on one side of the top of the upright post 2 close to the road through welding or bolting, the cross section of the tenon 27 is in a square ring shape, the inner diameter of the tenon 27 is the same as the outer diameter of the square pipe 15, and the square pipe 15 is inserted into the tenon 27.
The elevation of the top surface of the concrete poured inside the upright post 2 is the same as the elevation below the tenon.
In the above embodiment, the composite material has a light weight and a density of 1900-2100 kg/m3(ii) a The strength is high, for example, the tensile strength of the continuous glass fiber reinforced polyurethane pultrusion profile can reach 1200 MPa; the elastic modulus is small, generally not more than 50GPa, about one fourth of the elastic modulus of the steel material of 210GPa, and the deformation is larger under the same external force. The composite material disclosed by the invention has an energy absorption and buffering function, and for example, a front bumper is made of the composite material in the field of automobile industry. When the collision surface T of motor vehicles such as container trucks is perpendicular to the road surface, namely the front side collides with the beam, the round pipe or the square pipe and the stiffening rib bend and deform together and extrude the energy-absorbing buffer material, as shown in FIG. 14, the composite material and the energy-absorbing buffer material act together to absorb the potential energy of the motor vehicles and have a buffer effect on the potential energy. When the collision surface T of motor vehicles such as a cement tank truck and the like forms a certain angle with the road surface, namely, the cross beam is collided in an inclined upward direction, the cross beam rotates towards the vehicle-facing surface except that the round pipe or the square pipe and the stiffening rib jointly bend and deform and extrude the energy-absorbing buffer material, and the stiffening rib further extrudes the outer-coated energy-absorbing buffer material, as shown in figure 15, so that the potential energy of the motor vehicles is absorbed to the maximum extent and the collision of the motor vehicles is buffered.
In addition, even if the cross beam is damaged by collision and collapses, the probability of personal injury is reduced to the maximum extent due to the light weight of the cross beam.
Therefore, the height-limiting protection frame has the advantages of light weight, high strength, energy absorption and buffering and simple installation, has the function of warning the height of passing motor vehicles to be out of limit, can consume energy generated by the impact of ultrahigh motor vehicles, and reduces the probability of casualties caused by the collapse of the cross beam as far as possible.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A height-limiting protection frame with an energy-absorbing and buffering function is characterized by comprising a cross beam (1), two stand columns (2) and two inclined struts (3), wherein the cross beam (1) transversely penetrates through the two stand columns (2) supported on two sides of a road, and the bottom ends of the stand columns (2) are fixed on a bottom foundation through anchor bolts (4); the two inclined struts (3) are obliquely arranged on the back vehicle surfaces of the two upright posts (2) respectively and are perpendicular to a plane formed by the cross beam (1) and the upright posts (2), the top ends of the inclined struts (3) are connected with the upright posts, and the bottom ends of the inclined struts (3) are fixed on a bottom foundation through anchor bolts (4);
the middle of the inside of the cross beam (1) is a round pipe (11) or a square pipe (15), and the round pipe (11) or the square pipe (15) is arranged along the axial direction of the cross beam (1); the stiffening ribs (12) are uniformly arranged along the circumference of the round pipe (11) or the square pipe (15), each stiffening rib (12) is axially arranged along the cross beam (1), and the length of each stiffening rib (12) is equal to the clear distance W between the two upright posts (2); the energy-absorbing and buffering material (14) is filled in the round tube (11) or the square tube (15), and the energy-absorbing and buffering material (14) is coated outside the round tube (1);
the round pipe (11) or the square pipe (15) and the stiffening rib (12) are made of composite materials; the composite material is a multiphase material generated by a reinforcing material and a base material, wherein the reinforcing material is any one of glass fiber, basalt fiber or carbon fiber, the base material is any one of unsaturated polyester resin, vinyl resin, epoxy resin, polyurethane resin or phenolic resin, and the forming process is any one of winding, die pressing, vacuum infusion, pultrusion or resin transfer molding;
a first stop block (22) and a second stop block (23) are arranged on one side of the top of the upright post (2) close to the road along the periphery of the joint of the cross beam (1) and the upright post (2), and the first stop block (22) and the second stop block (23) are arranged in a manner of clinging to the stiffening rib (12); the number of the first stop blocks (22) is equal to that of the stiffening ribs (12), and the first stop blocks are distributed in the advancing direction of the stiffening ribs (12) rotating towards the vehicle-facing direction; the number of the second stop blocks (23) is 1-2, and the second stop blocks are positioned in the advancing direction of the stiffening ribs (12) rotating towards the direction of the back surface of the vehicle.
2. The height-limiting protective frame with the energy absorption and buffering functions as claimed in claim 1, wherein the cross section of the stiffening rib (12) is T-shaped, and an upper top plate of the T-shaped stiffening rib is fixedly attached to the outer wall of the round pipe (11) or the square pipe (15) through a rivet (13); or the stiffening ribs (12) are in the shape of a plate strip and are integrally formed with the circular tubes (11) or the square tubes (15).
3. The height-limiting protection frame with the energy-absorbing and buffering functions as claimed in claim 1, wherein the energy-absorbing and buffering material (14) is any one of foamed plastic and foamed metal.
4. The height-limiting protection frame with the energy absorption and buffer functions as claimed in claim 1,
the bottom end of the upright post (2) is provided with an upright post base plate (21), and the anchor bolt (4) penetrates through the upright post base plate (21) to connect the upright post (2) with the bottom foundation; and a vertically arranged lower stiffening plate (25) is uniformly arranged along the periphery of the bottom of the upright column (2), and the lower stiffening plate (25) is connected with the bottom of the upright column (2) and the upright column base plate (21).
The bottom of bracing (3) is equipped with bracing bed plate (31), anchor bolt (4) pass bracing bed plate (31) are connected bracing (3) and bottom basis.
5. The height-limiting protection frame with the energy absorption and buffering functions as claimed in claim 1, wherein the cross section of the upright post (2) is any one of a circular shape, a rectangular shape and an I-shaped shape with a constant section, and concrete is poured inside the upright post (2).
6. The height-limiting protection frame with the energy absorption and buffering functions as claimed in claim 1, wherein a round hole is formed in the top of the upright (2) along the transverse direction of the upright, the geometric dimension of the round hole corresponds to that of the cross beam round tube (11), and the end of the round tube (11) penetrates through the round hole and is exposed outside the upright (2);
or the top of the upright post (2) is transversely provided with a rectangular hole, the geometric dimension of the rectangular hole corresponds to that of the cross beam square tube (15), and the end part of the square tube (15) penetrates through the rectangular hole and is exposed out of the outer side of the upright post (2);
the top parts of the vehicle-facing surface and the vehicle-backing surface of the upright post (2) are respectively provided with an upper stiffening plate (24) which is vertically arranged.
7. The height-limiting protection frame with the energy absorption and buffering functions as claimed in claim 1, wherein a tenon (27) is arranged on one side of the top of the upright post (2) close to the road through welding or bolting, the cross section of the tenon (27) is circular or square, the inner diameter of the tenon (27) is the same as the outer diameter of the circular tube (11) and the square tube (15), and the circular tube (11) and the square tube (15) are inserted into the tenon (27).
8. The height-limiting protection frame with the energy absorption and buffering functions as claimed in claim 6 or 7, wherein a sealing plate (26) is arranged at the top end of the upright post (2), and a connecting gap between the end of the beam round tube (11) or the square tube (15) and the upright post (2) is sealed by a sealant.
9. The height-limiting protection frame with energy absorption and buffering functions according to claim 1, wherein the density of the composite material is 1900-2100 kg/m3。
10. The height-limiting protection frame with the energy absorption and buffering functions as claimed in claim 1, characterized in that the clear distance W between the two upright posts (2) is equal to the road surface limit width; the distance H from the lower surface of the cross beam (1) to the road surface is equal to the design limit height.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911349347.6A CN111101458B (en) | 2019-12-24 | 2019-12-24 | Height limiting protection frame with energy absorption and buffering functions |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911349347.6A CN111101458B (en) | 2019-12-24 | 2019-12-24 | Height limiting protection frame with energy absorption and buffering functions |
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| CN111101458A true CN111101458A (en) | 2020-05-05 |
| CN111101458B CN111101458B (en) | 2021-05-14 |
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| CN111501615A (en) * | 2020-06-09 | 2020-08-07 | 冯继超 | Height limiting rod for municipal road |
| CN111636327A (en) * | 2020-06-08 | 2020-09-08 | 侯宽飞 | Anti-collision protection height limiting device for highway bridge |
| CN112009217A (en) * | 2020-07-23 | 2020-12-01 | 中国第一汽车股份有限公司 | Composite material vehicle door anti-collision beam and preparation method thereof |
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|---|---|
| CN111101458B (en) | 2021-05-14 |
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