CN204112262U - A kind of road and bridge stiff safety fence of anti-car crass - Google Patents
A kind of road and bridge stiff safety fence of anti-car crass Download PDFInfo
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- CN204112262U CN204112262U CN201420653104.8U CN201420653104U CN204112262U CN 204112262 U CN204112262 U CN 204112262U CN 201420653104 U CN201420653104 U CN 201420653104U CN 204112262 U CN204112262 U CN 204112262U
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Abstract
The utility model discloses a kind of road and bridge stiff safety fence of anti-car crass, comprise guardrail body, described guardrail body is met the face of hitting and has been offered the crashproof groove of matrix, and the crashproof groove side of matrix is arc or linear, the crashproof groove top of matrix is arc, and the crashproof trough rim frame degree of depth is 0.5cm≤H≤10cm.When automobile with meet one or more matrixs that the face of hitting is offered crashproof groove arc-shaped frame collide time, collide with groove arc-shaped frame before automobile side, because shear strain do work and absorb impact kinetic energy, hit kinetic energy before reducing automobile; When climbing after car crass, the arcuate border on top and automobile collide shear strain, absorb again local collision kinetic energy, reduce upper punch impact kinetic energy, automobile is played to the effect of " limit for height ".Therefore, the crashproof groove arc-shaped frame of matrix repeatedly can realize energy-absorbing and slow down, and reduces the height that automobile is upspring because of collision, prevents overturning, reduces personal damage degree in automobile collision accident, protects driver and conductor's safety to greatest extent.
Description
Technical field
The utility model relates to highway (road) bridge traffic engineering technical field, specifically refers to a kind of road and bridge stiff safety fence of anti-car crass.
Background technology
Usually, recurrent traffic accident of hitting protective guard on a highway, vehicle speed is too fast, and stiff safety fence effectively can not absorb impact kinetic energy, causes overturning, and driver and conductor is damaged seriously.If stiff safety fence can effectively absorb impact kinetic energy and deceleration, the traffic accident driver and conductor damage of car hit protective guard can greatly alleviate.Domestic existing stiff safety fence; in collision process; only frictionally absorbs impact kinetic energy; damping time is too short; because energy-absorbing, slowing effect are poor; due protection is not played to the safety of automobile and occupant, also there is no the road and bridge stiff safety fence that effectively can absorb the powerful impact kinetic energy of automobile at present.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of effectively absorption car crass kinetic energy, can not causes overturning, reduces the road and bridge stiff safety fence of personal damage degree in automobile collision accident, protection driver and conductor safety.
For solving the problems of the technologies described above, the technical solution of the utility model is: the stiff safety fence of this anti-car crass, comprise guardrail body, described guardrail body is met the face of hitting and has been offered the crashproof groove of matrix, the crashproof groove side of matrix is arc or linear, the crashproof groove top of matrix is arc, and the matrix crashproof trough rim frame degree of depth is 0.5cm≤H≤10cm.
The described matrix crashproof trough rim frame degree of depth is 2cm≤H≤8cm.
It is described that to meet the crashproof groove Breadth Maximum of matrix on the face of hitting be 20cm≤L≤150cm.
Described meets the crashproof groove Breadth Maximum of matrix on the face of hitting 25cm≤L≤120cm.
Because the utility model meets on the face of hitting in stiff safety fence guardrail body to offer a crashproof groove of matrix, matrix crashproof trough rim frame is circular arc or imitative circular arc (broken line composition), and crashproof trough rim frame has certain depth.When automobile with meet the crashproof geosynclinal concave groove arc-shaped frame that the face of hitting is offered collide time, collide with groove arc-shaped frame before automobile side, because shear strain do work and absorb impact kinetic energy, hit kinetic energy before reducing automobile; Baltimore groove top frame is circular arc or imitative circular arc, when climbing after car crass to arcuate border top, the arcuate border on top and automobile collide shear strain, absorb again local collision kinetic energy, reduce automobile upper punch impact kinetic energy, automobile is played to the effect of " limit for height ".
Through actual measurement, when automotive front with meet the crashproof groove collision rift of the one or more matrix in the face of hitting, from meet hit face jump, after this, automotive front end leaves guardrail body, the instantaneous reduction of off-front wheel centre-height; Then; automobile rear can collide with meeting the face of the hitting crashproof groove of one or more matrix once again due to inertia; again absorb local collision kinetic energy; continue to reduce automobile forward, the impact kinetic energy of upper punch; therefore, the crashproof groove arcuate border of matrix repeatedly can realize energy-absorbing by the shear strain of automobile and slow down, and reduces the height that automobile is upspring because of collision; prevent overturning, reduce personal damage degree in automobile collision accident, protect driver and conductor's safety to greatest extent.
Accompanying drawing explanation
Fig. 1 is guardrail body perspective view;
Fig. 2 is guardrail body matrix crashproof groove side-looking structural representation;
Fig. 3 is guardrail body matrix crashproof groove Facad structure schematic diagram;
Fig. 4 is crashproof another embodiment of groove Facad structure of guardrail body matrix;
Fig. 5 is crashproof another embodiment of groove Facad structure of guardrail body matrix;
Fig. 6 clashes into have groove guardrail, slotless guardrail dolly acceleration of center of gravity comparison diagram;
Fig. 7 clashes into have groove guardrail, slotless guardrail dolly off-front wheel centre-height comparison diagram;
Fig. 8 clashes into have groove guardrail, slotless guardrail dolly height of C.G. comparison diagram.
Detailed description of the invention
With reference to figure 1---Fig. 8, the stiff safety fence of this anti-car crass, comprises guardrail body 1, described guardrail body is met the face of hitting 4 and has been offered the crashproof groove 3 of matrix, the crashproof groove side 6 of matrix is arc or linear, and the crashproof groove top 5 of matrix is arc, and the crashproof frame degree of depth of the crashproof groove of matrix is 0.5cm≤H≤10cm.
The crashproof frame degree of depth of the crashproof groove of described matrix is 2cm≤H≤8cm.
Described meets the crashproof groove Breadth Maximum of matrix on the face of hitting 20cm≤L≤150cm.
Described meets the crashproof groove Breadth Maximum of matrix on the face of hitting 25cm≤L≤120cm.
Through overtesting, frame depth H is shallow, automobile because of shear strain not obvious, energy-absorbing slowing effect is poor, and frame depth H is dark, and impact force is too large, and driver and conductor damages seriously; Crashproof groove Breadth Maximum L is too narrow or too wide, and automobile and matrix crashproof trough rim frame collision probability reduce.
When automobile climb up the crashproof trough rim frame 6 of matrix that slope 2 and guardrail are offered collide time, before automobile side, crashproof trough rim frame 6 collides with matrix, and automobile absorbs impact kinetic energy because shear strain acting, reduces automobile preshoot impact kinetic energy; Matrix crashproof groove top frame 5 is circular arc or imitative circular arc, when climbing after car crass to top frame 5, automobile and frame 5 collide shear strain, absorb again local collision kinetic energy, reduce automobile upper punch impact kinetic energy, automobile is played to the effect of " limit for height ".
The impact conditions that the utility model specifies according to Ministry of Communications JTG B05-01-2013 " highway barrier security performance evaluation standard ", by the stiff safety fence data of embodiment 2, carried out automobile analogue simulation impact test, its simulated crash condition is as following table:
Table 1 stiff safety fence impact conditions
| Collision vehicle | Impact velocity (Km/h) | Collision angle (°) | Car mass (T) |
| Little vehicle | 100 | 20 | 1.5 |
The utility model stiff safety fence adopts U.S. LSDYNA dynamic finite element analysis software to carry out automobile analogue simulation impact test, and experimental result shows:
As schemed, 6 show, car and the utility model stiff safety fence collision rift, and the acceleration in car center of gravity place (x, y, z) three directions is all less than evaluation criterion requirement, is namely less than 20g; And car and slotless stiff safety fence collision rift, the acceleration in its center of gravity place (x, y, z) three directions is all greater than evaluation criterion requirement, and maximum value reaches 35g.
In Fig. 6 a, dolly clashes into groove guardrail dolly center of gravity x directional acceleration maximum value 15g, and Fig. 6 b dolly clashes into slotless guardrail dolly center of gravity x directional acceleration maximum value 32g.
In Fig. 6 c, dolly clashes into groove guardrail dolly center of gravity y directional acceleration maximum value 14g, and Fig. 6 d dolly clashes into slotless guardrail dolly center of gravity y directional acceleration maximum value 35g.
In Fig. 6 e, dolly clashes into groove guardrail dolly center of gravity z directional acceleration maximum value 17g, and Fig. 6 f dolly clashes into slotless guardrail dolly center of gravity z directional acceleration maximum value 31g.
As shown in Figure 7, car and the utility model stiff safety fence collision rift, the maximum height upspring in off-front wheel center is significantly less than the maximum height upspring in car and slotless stiff safety fence collision rift off-front wheel center;
In Fig. 7 a, dolly clashes into groove guardrail off-front wheel centre-height change curve maximum value 0.48m, and Fig. 7 b dolly clashes into slotless guardrail off-front wheel centre-height change curve maximum value 1.7m.
As shown in Figure 8, car and the utility model stiff safety fence collision rift, the maximum height upspring in car center of gravity place is significantly less than the maximum height upspring in car and slotless stiff safety fence collision rift car center of gravity place;
In Fig. 8 a, dolly clashes into groove guardrail dolly height of C.G. change curve maximum value 0.45m, and Fig. 8 b dolly clashes into slotless guardrail dolly height of C.G. change curve maximum value 1.28m.
By the stiff safety fence data of embodiment 1,3,4,5, carried out automobile analogue simulation impact test, experimental result shows, frame depth H strengthens, automobile because of shear strain obvious, energy-absorbing slowing effect is better.
When the huge kinetic energy that automobile produces from certain collision angle high velocity impact the utility model stiff safety fence; due to the repeated action of above-mentioned collision shear strain and frictional force; absorb a large amount of impact kinetic energy; reduce automobile preshoot, upper punch impact kinetic energy; automobile analogue simulation impact test proves: buffering, the decelerating effect of the utility model stiff safety fence are obvious; effectively alleviate the degree of injury of automobile collision accident; better protect the safety of driver and conductor; be a technology having development and use value, the stiff safety fence of road and bridge can be widely used in.
Embodiment 1
According to highway, bridge-collision-avoidance requirement, formulate anticollision barrier each several part size, carry out analogue simulation, then drawing is provided by working drawing requirement, (containing internal construction reinforcement drawing), makes the shaping masterplate of guardrail by drawing, meets after the crashproof groove shape of matrix on the face of hitting can be shaped with PVC and is fixed on masterplate again, arc-shaped frame 5,6 depth H is 2cm, and the most width L of the crashproof groove of matrix is 25cm.Then, assembling reinforcement (steel product quality and colligation require to meet existing related specifications); Erection masterplate, guardrail body 1 can be fixed on ground, cast-in-place micro aggregate concrete (building materials used and concrete strength should meet existing related specifications); On-the-spot maintenance is shaping; After acceptance on examination is qualified, come into operation, automobile emulation actual measurement has been carried out: dolly clashes into dolly center of gravity x directional acceleration maximum value 16g, dolly center of gravity y directional acceleration maximum value 15g, dolly center of gravity z directional acceleration maximum value 18g through U.S. LSDYNA dynamic finite element analysis software; Dolly clashes into off-front wheel centre-height change curve maximum value 0.5m; Dolly height of C.G. change curve maximum value 0.49m.
Embodiment 2
According to highway, bridge-collision-avoidance requirement, formulate anticollision barrier each several part size, carry out analogue simulation, then provide drawing by working drawing requirement, (containing internal construction reinforcement drawing); Make the shaping masterplate of guardrail by drawing, meet after the crashproof groove shape of matrix on the face of hitting can be shaped with PVC and be fixed on masterplate again, arc-shaped frame 5,6 depth H is 4cm, and the most width L of the crashproof groove of matrix is 45cm.Then, assembling reinforcement (steel product quality and colligation require to meet existing related specifications), guardrail body 1 can be fixed on ground, erection masterplate; Cast-in-place micro aggregate concrete (building materials used and concrete strength meet existing related specifications); On-the-spot maintenance is shaping; After acceptance on examination is qualified, come into operation.Automobile emulation actual measurement has been carried out: dolly clashes into dolly center of gravity x directional acceleration maximum value 15g, dolly center of gravity y directional acceleration maximum value 14g, dolly center of gravity z directional acceleration maximum value 17g through U.S. LSDYNA dynamic finite element analysis software; Dolly clashes into off-front wheel centre-height change curve maximum value 0.48m; Dolly height of C.G. change curve maximum value 0.45m.
Embodiment 3
According to highway, bridge-collision-avoidance requirement, formulate anticollision barrier each several part size, carry out analogue simulation, then provide drawing by working drawing requirement, (containing internal construction reinforcement drawing); Make the shaping masterplate of guardrail by drawing, meet after the crashproof groove shape of matrix on the face of hitting can be shaped with PVC and be fixed on masterplate again, arc-shaped frame 5,6 depth H is 5cm, and the most width L of the crashproof groove of matrix is 80cm.Then, assembling reinforcement (steel product quality and colligation require to meet existing related specifications), guardrail body 1 can be fixed on ground, increases reinforcing bar, gain in strength at crashproof geosynclinal concave trough rim frame 5,6 place, erection masterplate; Cast-in-place micro aggregate concrete (building materials used and concrete strength meet existing related specifications); On-the-spot maintenance is shaping; After acceptance on examination is qualified, come into operation.Automobile emulation actual measurement has been carried out: dolly clashes into dolly center of gravity x directional acceleration maximum value 12g, dolly center of gravity y directional acceleration maximum value 12g, dolly center of gravity z directional acceleration maximum value 15g through U.S. LSDYNA dynamic finite element analysis software; Dolly clashes into off-front wheel centre-height change curve maximum value 0.45m; Dolly height of C.G. change curve maximum value 0.44m.
Embodiment 4
According to highway, bridge-collision-avoidance requirement, formulate anticollision barrier each several part size, carry out analogue simulation, then provide drawing by working drawing requirement, (containing internal construction reinforcement drawing); Make the shaping masterplate of guardrail by drawing, meet after the crashproof groove shape of matrix on the face of hitting can be shaped with PVC and be fixed on masterplate again, arc-shaped frame 5,6 depth H is 8cm, and the most width L of the crashproof groove of matrix is 110cm.Then, assembling reinforcement (steel product quality and colligation require to meet existing related specifications), guardrail body 1 can be fixed on ground, increases reinforcing bar, gain in strength at crashproof geosynclinal concave trough rim frame 5,6 place, erection masterplate; Cast-in-place micro aggregate concrete (building materials used and concrete strength meet existing related specifications); On-the-spot maintenance is shaping; After acceptance on examination is qualified, come into operation.Automobile emulation actual measurement has been carried out: dolly clashes into dolly center of gravity x directional acceleration maximum value 12g, dolly center of gravity y directional acceleration maximum value 12g, dolly center of gravity z directional acceleration maximum value 14g through U.S. LSDYNA dynamic finite element analysis software; Dolly clashes into off-front wheel centre-height change curve maximum value 0.45m; Dolly height of C.G. change curve maximum value 0.44m.
Embodiment 5
According to highway, bridge-collision-avoidance requirement, formulate anticollision barrier each several part size, carry out analogue simulation, then provide drawing by working drawing requirement, (containing internal construction reinforcement drawing); Make the shaping masterplate of guardrail by drawing, meet after the crashproof groove shape of matrix on the face of hitting can be shaped with PVC and be fixed on masterplate again, arc-shaped frame 5,6 depth H is 9cm, and the most width L of the crashproof groove of matrix is 140cm.Then, assembling reinforcement (steel product quality and colligation require to meet existing related specifications), guardrail body 1 can be fixed on ground, erection masterplate; Cast-in-place micro aggregate concrete (building materials used and concrete strength meet existing related specifications); On-the-spot maintenance is shaping; After acceptance on examination is qualified, come into operation.Automobile emulation actual measurement has been carried out: dolly clashes into dolly center of gravity x directional acceleration maximum value 11g, dolly center of gravity y directional acceleration maximum value 12g, dolly center of gravity z directional acceleration maximum value 14g through U.S. LSDYNA dynamic finite element analysis software; Dolly clashes into off-front wheel centre-height change curve maximum value 0.44m; Dolly height of C.G. change curve maximum value 0.44m.
Claims (4)
1. the road and bridge stiff safety fence of an anti-car crass, comprise guardrail body, it is characterized in that: described guardrail body is met the face of hitting and offered the crashproof groove of matrix, the crashproof groove side of matrix is arc or linear, the crashproof groove top of matrix is arc, and the crashproof trough rim frame degree of depth is 0.5cm≤H≤10cm.
2. road and bridge according to claim 1 stiff safety fence, it is characterized in that: described crashproof trough rim frame degree of depth 2cm≤H≤8cm.
3. road and bridge according to claim 1 stiff safety fence, it is characterized in that: described meets the crashproof groove Breadth Maximum of matrix on the face of hitting 20cm≤L≤150cm.
4. road and bridge according to claim 3 stiff safety fence, it is characterized in that: described meets the crashproof groove Breadth Maximum of matrix on the face of hitting 25cm≤L≤120cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420653104.8U CN204112262U (en) | 2014-11-05 | 2014-11-05 | A kind of road and bridge stiff safety fence of anti-car crass |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420653104.8U CN204112262U (en) | 2014-11-05 | 2014-11-05 | A kind of road and bridge stiff safety fence of anti-car crass |
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| Publication Number | Publication Date |
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| CN204112262U true CN204112262U (en) | 2015-01-21 |
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| CN201420653104.8U Expired - Fee Related CN204112262U (en) | 2014-11-05 | 2014-11-05 | A kind of road and bridge stiff safety fence of anti-car crass |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104372756A (en) * | 2014-11-05 | 2015-02-25 | 余进修 | Rigid road bridge barrier for preventing car crash |
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2014
- 2014-11-05 CN CN201420653104.8U patent/CN204112262U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104372756A (en) * | 2014-11-05 | 2015-02-25 | 余进修 | Rigid road bridge barrier for preventing car crash |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 Termination date: 20171105 |