周磊生 于浩 李月祥 徐俊德 夏永生

摘 要： 依托经实车碰撞试验验证、防护等级满足A级的高性能金属护栏，开发了一种安装拆移简便、具备良好复用性和回收性、可作为永久或临时综合利用的高性能可移动钢护栏。在不改变原有护栏的受力结构基础上，优化护栏的安装、连接细部构造，在护栏的底部设置活动滚轮，便于转运。运用有限元软件对优化后的护栏进行碰撞仿真模拟，验证其防护性能仍满足A级。

关键词： 钢护栏; 可移动; 数值模拟; 防撞性能

中图分类号：       文献标志码：

Study on Design of Movable Steel Guardrail with High Performance and

Collision Simulation

ZHOU Leisheng1， YU Hao1， LI Yuexiang1， XU Junde2， XIA Yongsheng3

（1. Qilu Transportation Development Group， Jinan 250100; 2. Guangdong Communication

Planning & Design Institute Co. Ltd.， Guangzhou 510000; 3. Shanghai Qichan Transportation

Facilities Engineering Co. Ltd.， Shanghai 201499）

Abstract： A movable metal guardrail was developed based on an existed guardrail which has been verified up to standard of Grade A in protection level by real vehicle crash test. The new movable guardrail could be utilized comprehensively as permanent or temporary facilities with many merits including convenience of installation and removal， and good crashworthiness， reusability and recycling. The structure of guardrail connection parts was optimized retaining the original stressed structure. The wheel combination was installed at the bottom of the guardrail， which made the guardrail movable as a temporary facility. A collision simulation experiment of the optimized guardrail was conducted based on finite element model （FEM） to ensure that meet Grade A.

Key words： Steel guardrail; Movability; Numerical simulation; Crashworthiness

0 引言

近年來，我国高速公路建设速度较快，高速公路路网已接近完善，新建道路已渐渐趋向于饱和。但随着经济的发展，交通量的日益增加，高速公路路网出现了局部交通量饱和甚至拥堵，高速公路将迎来较多的改扩建工程[1]。高速公路改扩建工程通常是在不封闭交通的情况下进行的，高速的交通流和复杂的现场作业环境容易诱发交通事故和交通拥堵，因此，施工作业区需设置完善的交通安全保障措施[2]。目前，我国公路作业区隔离设施主要以水马、交通锥、水泥隔离墩为主，只有警示或者硬隔离的作用，基本不具备防撞性能，在发生交通事故时保护不了行驶车辆及施工区内的工作人员，其碰撞解体后的抛洒物更有可能造成较大的二次事故[3]。国外部分在用的公路施工区隔离护栏，虽具备一定的防撞性能，但安装时需对道路路面进行锚固，造成较大路面损毁，难以符合工程的需求。……