CN104047245A - Guard bar and mounting method thereof - Google Patents
Guard bar and mounting method thereof Download PDFInfo
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- CN104047245A CN104047245A CN201410323028.9A CN201410323028A CN104047245A CN 104047245 A CN104047245 A CN 104047245A CN 201410323028 A CN201410323028 A CN 201410323028A CN 104047245 A CN104047245 A CN 104047245A
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- guard bar
- arc plate
- fence upright
- wire rope
- stand column
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Abstract
The invention discloses a guard bar. The guard bar comprises a guard bar stand column and a steel wire rope, the guard bar stand column comprises arc plates capable of being connected with the steel wire rope, the number of the arc plates is two, concave faces of the arc plates are opposite and are welded together, and the central angle of each arc plate is smaller than 180 degrees. According to the technical scheme, the guard bar comprises the guard bar stand column and the steel wire rope connected with the guard bar stand column, the shape of the section of the guard bar stand column is changed to adjust the longitudinal and transverse stiffness ratio of the guard bar stand column, inertia moment is correspondingly increased, the contact area of a traffic accident vehicle and the guard bar in collision is increased, and collision force in the collision process of the traffic accident vehicle and the guard bar stand column is resolved into two directions, wherein one direction is consistent with the tangential direction of a road, and the other direction is perpendicular to the tangential direction of the road, so that the effect that energy absorption density is distributed in a balanced mode is improved, the collaborative stress ability of the guard bar stand column and the steel wire rope is improved, and safety of the guard bar is improved to a certain extent. The invention further provides a mounting method of the guard bar.
Description
Technical field
The present invention relates to highway safe guarding device technical field, particularly a kind of guardrail and mounting method thereof.
Background technology
Existing guardrail is divided into stiff safety fence, semi-rigidity rail and flexible safety fence by mechanical characteristic.Fence upright is a part for guardrail, is also one of key member determining guardrail performance.
At present, the design of domestic fence upright mainly stresses crashworthiness, and its rigidity is higher, and column rigidity is high, in the collision process of vehicle and guardrail, can play the resistance effect of stumbling to vehicle, can not change along with the variation of the impact energy of errant vehicle, and security performance is low.
Therefore, how to improve the security performance of fence upright, become those skilled in the art's technical problem urgently to be resolved hurrily.
Summary of the invention
In view of this, the invention provides a kind of guardrail, to improve the security performance of fence upright.The present invention also provides a kind of guardrail mounting method.
For achieving the above object, the invention provides following technical scheme:
A kind of guardrail, comprises fence upright and the wire rope being connected with described fence upright, and described fence upright comprises:
The arc plate that can be connected with wire rope, the number of described arc plate is two, and the concave surface positioned opposite of described arc plate and being welded to connect, the central angle of described arc plate is less than 180 °.
Preferably, in above-mentioned guardrail, the central angle of described arc plate is 100 °～150 °, and the thickness of described arc plate is 4～8mm, and the radius of described arc plate is 50～110mm.
Preferably, in above-mentioned guardrail, described arc plate is the arc plate that low-carbon steel material is made.
A kind of guardrail mounting method, for the guardrail described in above-mentioned any one is installed, comprises step:
1) pre-buried described fence upright, the plane at the place, junction of two described arc plates becomes α angle with road tangential direction, 30 °≤α≤60 °;
2) described wire rope is connected with described fence upright.
Preferably, in above-mentioned guardrail mounting method, described wire rope is connected by hook with described fence upright or is connected with the friction pair of described fence upright contact surface by described wire rope.
Can find out from technique scheme, guardrail provided by the invention comprises fence upright and the wire rope being connected with fence upright, fence upright is welded to each other and is formed by the arc plate of two positioned opposite, the similar ellipsoidal structure of fence upright, the fence upright that this programme provides is adjusted the vertical of fence upright by changing the cross sectional shape of fence upright, lateral stiffness ratio, the corresponding increase of moment of inertia, also the contact area while having increased accident vehicle and rail collision, in the collision process of accident vehicle and fence upright, impact force is resolved into along road tangential direction with perpendicular to road tangential direction both direction, improve the cooperative bearing ability between effect and fence upright and the wire rope that energy-absorbing density equalization distributes, improve to a certain extent the security performance of guardrail.
A kind of guardrail mounting method that the present invention also provides, in the process of installing, the plane at place, junction of the arc plate of fence upright and the tangential direction of road become 30 ° of-60 ° of angles, can increase the contact area between fence upright and accident vehicle, make the abundant energy-absorbing of fence upright, improved the security performance of fence upright.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The arc angle that Fig. 1 provides for the embodiment of the present invention and the broken line graph of peak acceleration;
The arc angle that Fig. 2 provides for the embodiment of the present invention and the broken line graph of maximum offset;
The circular arc thickness that Fig. 3 provides for the embodiment of the present invention and the broken line graph of peak acceleration;
The circular arc thickness that Fig. 4 provides for the embodiment of the present invention and the broken line graph of maximum offset;
The arc radius that Fig. 5 provides for the embodiment of the present invention and the broken line graph of peak acceleration;
The arc radius that Fig. 6 provides for the embodiment of the present invention and the broken line graph of maximum offset;
Axis and the angle of road tangent line and the broken line graph of peak acceleration of the arc plate that Fig. 7 provides for the embodiment of the present invention;
Axis and the angle of road tangent line and the broken line graph of maximum offset of the arc plate that Fig. 8 provides for the embodiment of the present invention;
The structural representation of the arc plate that Fig. 9 provides for the embodiment of the present invention;
The top view of the fence upright that Figure 10 provides for the embodiment of the present invention;
The front view of the fence upright that Figure 11 provides for the embodiment of the present invention;
The structural representation when fence upright that Figure 12 provides for the embodiment of the present invention does not bump;
Structural representation after the fence upright that Figure 13 provides for the embodiment of the present invention bumps;
The structural representation when fence upright that Figure 14 provides for the embodiment of the present invention is installed.
Detailed description of the invention
The invention discloses a kind of guardrail, to improve the security performance of fence upright.The invention also discloses a kind of guardrail mounting method.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1-Figure 14, the arc angle that Fig. 1 provides for the embodiment of the present invention and the broken line graph of peak acceleration; The arc angle that Fig. 2 provides for the embodiment of the present invention and the broken line graph of maximum offset; The circular arc thickness that Fig. 3 provides for the embodiment of the present invention and the broken line graph of peak acceleration; The circular arc thickness that Fig. 4 provides for the embodiment of the present invention and the broken line graph of maximum offset; The arc radius that Fig. 5 provides for the embodiment of the present invention and the broken line graph of peak acceleration; The arc radius that Fig. 6 provides for the embodiment of the present invention and the broken line graph of maximum offset; Axis and the angle of road tangent line and the broken line graph of peak acceleration of the arc plate that Fig. 7 provides for the embodiment of the present invention; Axis and the angle of road tangent line and the broken line graph of maximum offset of the arc plate that Fig. 8 provides for the embodiment of the present invention; The structural representation of the arc plate that Fig. 9 provides for the embodiment of the present invention; The top view of the fence upright that Figure 10 provides for the embodiment of the present invention; The front view of the fence upright that Figure 11 provides for the embodiment of the present invention; The structural representation when fence upright that Figure 12 provides for the embodiment of the present invention does not bump; Structural representation after the fence upright that Figure 13 provides for the embodiment of the present invention bumps, the structural representation when fence upright that Figure 14 provides for the embodiment of the present invention is installed.
A kind of guardrail, comprises fence upright and the wire rope being connected with fence upright, and fence upright comprises:
The arc plate 1 that can be connected with wire rope, the number of arc plate 1 is two, and the concave surface positioned opposite of arc plate 1 and being welded to connect, the central angle of arc plate 1 is less than 180 °.
The fence upright that this programme provides, arc plate 1 by two positioned opposite is welded, fence upright entirety is ellipsoid like structure, vertical and the ground configuration of column, thereby the vertical, horizontal ratio of rigidity of adjusting fence upright by changing the cross sectional shape of fence upright, under the condition of equivalent material, the fence upright that this programme provides can effectively increase the contact area with accident vehicle, contact stress while greatly having reduced collision, reaches the effect that energy-absorbing density equalization distributes; In addition, the fence upright that this programme provides is hollow column, intensity is low with respect to fence upright rigidity of the prior art, can greatly improve with wire rope cooperative bearing ability, can smooth absorption collision energy, both ensured that guardrail had good crashworthiness, ensured passenger's safety simultaneously, and there is low, the easy manufacture of cost, environmental protection and be easy to construction etc. advantage.
The fence upright that this programme provides with the process of collision happens in, endergonic process is divided into three phases: in the time that vehicle just contacts with fence upright, between fence upright and accident vehicle, there is maximum contact area, now can realize the maximization of equiblibrium mass distribution and the energy-absorbing of energy-absorbing density, fence upright produces slight flexural deformation; Vehicle and rail collision mid-term, vehicle further comes in contact with fence upright, and further deformation occurs the arc plate 1 of fence upright, and now wire rope and fence upright are collaborative bears impact force, further reduces the speed of a motor vehicle and side-play amount; In the vehicle collision guardrail later stage, under the effect of vehicle collision power, the fence upright plastic strain that bends, absorbs the remaining impact energy of vehicle, now accident vehicle stop motion.The fence upright that this programme provides, in the collision process of fence upright and accident vehicle, impact force can be decomposed into both direction, one along road tangential direction, another edge is perpendicular to road tangential direction, impact force is played to decomposition, further realized the maximization of equiblibrium mass distribution and the energy-absorbing of energy-absorbing density.
In order further to optimize technique scheme, in a specific embodiment of the present invention,
The central angle of arc plate 1 is 100 °～150 °, and the thickness of arc plate 1 is 4～8mm, and the radius of arc plate 1 is 50～110mm.
For compact car, mainly to reduce its peak acceleration, reduce passenger's danger, for large car, be mainly to reduce its maximum offset, avoid the generation of second accident, therefore for the travel difference of road conditions of compact car and large car, also can there is corresponding variation in the parameter of fence upright, known with reference to figure 1-Fig. 8 content:
1) the central angle design parameters of arc plate 1: for the road conditions of travelling of compact car, the central angle of arc plate 1 is arranged within the scope of 100 °-125 °, from Fig. 1 and Fig. 2, along with the increase of central angle, the peak acceleration of compact car is linear increment trend, and maximum offset is linear decrease trend, preferred, the safety of considering the interior driver of compact car and passenger, the central angle of arc plate 1 is the smaller the better; For the road conditions of travelling of large car, the central angle of arc plate 1 is arranged within the scope of 125 °-150 °, from Fig. 1 and Fig. 2, along with the increase of central angle, the peak acceleration of large car is linear increment trend, and maximum offset is linear decrease trend, preferred, consider that large car easily causes the situation of second accident, the central angle of arc plate 1 is the bigger the better.
2) the circular arc Thickness Design parameter of arc plate 1: for the compact car road conditions of travelling, the thickness of arc plate 1 is arranged within the scope of 4-6mm, from Fig. 3 and Fig. 4, along with the increase of arc plate 1 thickness, the peak acceleration of compact car is linear increment trend, maximum offset is linear decrease trend, preferably, consider the interior driver of compact car and passenger's safety, the thickness of arc plate 1 is the smaller the better, rigidity is little, can play good guidance quality effect; For the road conditions of travelling of large car, the thickness of arc plate 1 is arranged within the scope of 5-8mm, from Fig. 3 and Fig. 4, along with the increase of circular arc thickness, the peak acceleration of large car is linear increment trend, maximum offset is linear decrease trend, preferably, consider that large car easily causes the situation of second accident, the thickness of arc plate 1 is the bigger the better, reach certain rigidity, effectively stop vehicle.
3) the arc radius design parameters of arc plate 1: for the compact car road conditions of travelling, the arc radius of arc plate 1 is arranged within the scope of 50-80mm, from Fig. 5 and Fig. 6, along with the increase of the arc radius of arc plate 1, the peak acceleration of compact car is linear increment trend, maximum offset is linear decrease trend, preferably, consider the interior driver of compact car and passenger's safety, the arc radius of arc plate 1 is the smaller the better, in collision process, can play effective cushioning effect to vehicle, fully energy-absorbing; For the road conditions of travelling of large car, the arc radius of arc plate 1 is arranged within the scope of 80-110mm, from Fig. 5 and Fig. 6, along with the increase of the arc radius of arc plate 1, the peak acceleration of large car is linear increment trend, maximum offset is linear decrease trend, and it is very fast to successively decrease, preferred, consider that large car easily causes the situation of second accident, the arc radius of arc plate 1 is the bigger the better, and can increase the contact area between fence upright and vehicle, effectively energy-absorbing.
The present invention comes from crash-worthiness topological optimization result.Traditional Topology Optimization Method is generally used for static and simple dynamic optimization, taking sensitivity analysis as basis, can not solve the topology optimization problem of instantaneous loading and complicated fringe conditions, this programme uses crash-worthiness topological optimization technology to solve the continuous topology optimization problem of Nonlinear Transient large deformation, adopt variable density method: variable density method realizes by Finite Element Method, the density of material of each unit is as design variable, density of material can change continuously between 0 to 1, the Rigidity and strength of unit is visualized as with density of material and meets certain linear relationship, after optimization, delete to obtain optimum topological structure according to cell density.The method obtains the optimal material distribution scheme that not only meets constraints but also meet object function in given design domain, and it only needs designer to provide design domain, constraints and optimization aim, just can automatically calculate the topology configuration of structure optimum.The present invention taking the impact conditions of A level guardrail in " highway barrier safety evaluatio standard JTGB05-01-2013 " for basic, the square sectional column of 200mm*200mm is set to optimize region, with can consistent in density in the guidance quality of vehicle, column and energy-absorbing maximum turn to the constraints of topological optimization, to optimize mass ratio as topological optimization target, the comprehensive different quality of analyzing, than corresponding result, extracts topology configuration.
In order to ensure the working strength of guardrail, arc plate is the arc plate that low-carbon steel material is made.
The invention also discloses a kind of guardrail mounting method, for above-mentioned guardrail is installed, comprise step:
1) pre-buried fence upright, fence upright is above-mentioned fence upright, the plane at the place, junction of two arc plates 1 becomes α angle with road tangential direction, wherein the scope of α angle is: 30 °≤α≤60 °, can ensure in collision process, accident vehicle can contact with fence upright generation larger area, makes fully energy-absorbing of fence upright;
2) wire rope is connected with fence upright, makes in collision process, wire rope and fence upright cooperative bearing, can ensure the crashproof ability of guardrail, also can ensure the guidance quality of guardrail.
In order further to optimize technique scheme, in a specific embodiment of the present invention, wire rope is connected by hook with fence upright or is connected with the friction pair of described fence upright contact surface by described wire rope, the number of plies of wire rope be 2-5 layer by layer, and every layer comprise one or more wire rope.
Collide mid-term at vehicle and fence upright; wire rope and accident vehicle acting in conjunction are on fence upright; two arc plates 1 of fence upright produce crimp; upper strata wire rope pops up; effectively protection motorbus; make it can not ride or cross protective guard, two wire rope of lower floor can effectively protect pony car can not get out, thereby have effectively protected personnel and vehicle.
In addition, in order further to improve energy-absorbing effect, arc plate 1 setting angle has certain requirement, the parameter designing of setting angle:
For the road conditions of travelling of compact car, angle between plane and the road tangent line at two arc plate 1 places, junction is 30 °-45 °, from Fig. 7 and Fig. 8, along with the increase of setting angle, the peak acceleration of compact car is linear decrease trend, and decline rate is very fast, maximum offset is linear increment trend, and increase progressively slower, consider the interior driver of compact car and passenger's safety, preferably, the compact car road conditions of travelling, angle between the axis of arc plate 1 and road tangent line is the bigger the better, increase the collision area between fence upright and vehicle, make the abundant energy-absorbing of column, for the road conditions of travelling of large car, angle between plane and the road tangent line at two arc plate 1 places, junction is 45 °-60 °, from Fig. 7 and Fig. 8, along with the increase of setting angle, the peak acceleration of large car almost becomes moderate tone, maximum offset is linear increment trend, consider that the quality of large car own is large, cause inertia large, easily there is the situation of second accident, angle between the axis of arc plate 1 and road tangent line is the bigger the better, and increases the contact area of vehicle and fence upright, plays effective cushioning effect.
The fence upright that this programme provides not only can be for flexible safety fence, also can be for semi-rigidity rail.
The guardrail that this programme provides is not only applicable to trackside protection, is applicable to protect in road yet.
The device that this scheme provides is well positioned to meet guardrail safety evaluation index, has with low cost, easy for installation, the features such as later maintenance cost is low, after bumping, only the fence upright deforming need to be changed, by fixing to new fence upright and wire rope.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. a guardrail, comprises fence upright and the wire rope being connected with described fence upright, it is characterized in that, described fence upright comprises:
The arc plate (1) that can be connected with wire rope, the number of described arc plate (1) is two, and the concave surface positioned opposite of described arc plate (1) and being welded to connect, the central angle of described arc plate (1) is less than 180 °.
2. guardrail according to claim 1, it is characterized in that, the central angle of described arc plate (1) is 100 °～150 °, and the thickness of described arc plate (1) is 4～8mm, and the radius of described arc plate (1) is 50～110mm.
3. according to the guardrail described in claim 1, it is characterized in that the arc plate that described arc plate (1) is made for low-carbon steel material.
4. a guardrail mounting method, is characterized in that, for the guardrail as described in claim 1-3 any one is installed, comprises step:
1) pre-buried described fence upright, the plane at the place, junction of two described arc plates (1) becomes α angle with road tangential direction, 30 °≤α≤60 °;
2) described wire rope is connected with described fence upright.
5. according to the guardrail mounting method described in claim 4, it is characterized in that, described wire rope is connected by hook with described fence upright or is connected with the friction pair of described fence upright contact surface by described wire rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410323028.9A CN104047245A (en) | 2014-07-08 | 2014-07-08 | Guard bar and mounting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410323028.9A CN104047245A (en) | 2014-07-08 | 2014-07-08 | Guard bar and mounting method thereof |
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| Publication Number | Publication Date |
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| CN104047245A true CN104047245A (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410323028.9A Pending CN104047245A (en) | 2014-07-08 | 2014-07-08 | Guard bar and mounting method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216050A (en) * | 2021-05-29 | 2021-08-06 | 中国海洋大学 | Method for improving upright post of highway guardrail |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE448893B (en) * | 1982-03-08 | 1987-03-23 | Arne Akerstrom | Posts marking sides of highways |
| US20020014620A1 (en) * | 2000-05-26 | 2002-02-07 | Hakan Nilsson | Side guard fence |
| CN200978398Y (en) * | 2006-12-15 | 2007-11-21 | 李继东 | Flexible guard rail |
| CN200992689Y (en) * | 2006-12-31 | 2007-12-19 | 浙江晶日照明科技有限公司 | Road guardrail stand |
| CN202595675U (en) * | 2011-11-19 | 2012-12-12 | 常州百川新型护栏有限公司 | Guardrail for road protection |
| CN103080424A (en) * | 2010-07-29 | 2013-05-01 | 贝恩特·阿克尔施特伦 | Bendable upright post of steel wire rope protective guard |
-
2014
- 2014-07-08 CN CN201410323028.9A patent/CN104047245A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE448893B (en) * | 1982-03-08 | 1987-03-23 | Arne Akerstrom | Posts marking sides of highways |
| US20020014620A1 (en) * | 2000-05-26 | 2002-02-07 | Hakan Nilsson | Side guard fence |
| CN200978398Y (en) * | 2006-12-15 | 2007-11-21 | 李继东 | Flexible guard rail |
| CN200992689Y (en) * | 2006-12-31 | 2007-12-19 | 浙江晶日照明科技有限公司 | Road guardrail stand |
| CN103080424A (en) * | 2010-07-29 | 2013-05-01 | 贝恩特·阿克尔施特伦 | Bendable upright post of steel wire rope protective guard |
| CN202595675U (en) * | 2011-11-19 | 2012-12-12 | 常州百川新型护栏有限公司 | Guardrail for road protection |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216050A (en) * | 2021-05-29 | 2021-08-06 | 中国海洋大学 | Method for improving upright post of highway guardrail |
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Application publication date: 20140917 |
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