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波形护栏及其防撞原理

发布时间:2020-09-21 11:08:36人气:
  根据受力特点,波纹护栏分为刚性波纹护栏、柔性波纹护栏和半刚性波纹护栏。刚性波纹护栏基本上不动,不变形,如混凝土波纹护栏,对车辆有较大影响,不利于居民安全。目前只在一些非常危险的地段使用。柔性护栏是柔性护栏的一种。缆索护栏是柔性护栏的主要代表。它是由多条初始张力的缆绳固定在柔性护栏的末端而形成的。主要依靠拉索的拉应力来抵抗车辆碰撞和吸收碰撞能量。半刚性波纹护栏是一种具有一定刚度和柔性的连续梁柱护栏结构。通过波形护栏的弯曲变形和拉力来抵抗车辆碰撞。典型的半刚性护栏目前广泛应用于高速公路上
 
  波形护栏的防撞原理是通过护栏与车辆之间的弹塑性变形、摩擦和车体位移来吸收车辆的冲击能量,从而保护乘客的安全。本发明的具体功能如下:
 
  (1)拦截车辆,防止车辆横穿道路,保护越野行人和重要建筑物的安全,保证与行人和重要建筑物交叉的公路、铁路的安全,防止失控车辆通过中央隔离带进入对向车道。
 
  (2)将车辆返回正常行驶方向。车辆与护栏碰撞的轨道应具有平稳过渡的特点。在不影响车辆正常行驶的情况下,应保持较小的离去角和少量的回弹,以免发生二次事故。
 
  (3)一旦失控车辆与护栏相撞,应尽量减少对车辆乘员的伤害,护栏应具有良好的能量吸收特性。
 
  (4)引导驾驶员视线,使其看清前方道路轮廓和路线,提高行车安全性,提高道路整体美观效果。
 
  According to the stress characteristics,the corrugated guardrail is divided into rigid corrugated guardrail,flexible corrugated guardrail and semi-rigid corrugated guardrail.Rigid corrugated guardrail basically does not move,does not deform,such as concrete corrugated guardrail,has a greater impact on vehicles,is not conducive to the safety of residents.At present,it is only used in some very dangerous sections.The flexible guardrail is a kind of flexible guardrail.Cable guardrail is the main representative of flexible guardrail.It is formed by fixing the end of flexible guardrail with multiple cables with initial tension.It mainly depends on the tensile stress of cable to resist vehicle collision and absorb collision energy.Semi rigid corrugated guardrail is a kind of continuous beam column guardrail structure,which is rigid and flexible to a certain extent.It can resist vehicle collision by bending deformation and tensile force of corrugated guardrail.A typical semi-rigid barrier is now widely used on expressways
 
  The anti-collision principle of corrugated guardrail is to absorb the impact energy of vehicle through elastic-plastic deformation,friction and body displacement between guardrail and vehicle,so as to protect the safety of passengers.The specific functions of the invention are as follows:
 
  (1)Stop vehicles,prevent vehicles from crossing the road,protect the safety of off road pedestrians and important buildings,ensure the safety of roads and railways intersecting with pedestrians and important buildings,and prevent out of control vehicles from entering the opposite lane through the central isolation zone.
 
  (2)Return the vehicle to the normal direction of travel.The track of vehicle collision with guardrail should have the characteristics of smooth transition.Under the condition of not affecting the normal driving of vehicles,it should keep a small departure angle and a small amount of rebound,so as to avoid secondary accidents.
 
  (3)Once the runaway vehicle collides with the guardrail,the damage to the vehicle occupants should be minimized,and the guardrail should have good energy absorption characteristics.
 
  (4)Guide the driver's line of sight,make them see the road outline and the route in front of them,increase the driving safety and improve the overall aesthetic effect of the road.
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