基于颗粒流模拟的避险车道制动床长度确定方法  

Determining Method of Length of Arrested Bed of Truck Escape Ramp Based on Particle Flow Simulation

作　　者：张高强[1,2] 孙传夏 程晓辉[4] 张建军[1,2] 刘海涛 

机构地区：[1]交通运输部公路科学研究院,北京100088 [2]公路交通安全技术交通行业重点实验室,北京100088 [3]河南省交通运输厅公路管理局,河南郑州450052 [4]清华大学土木水利学院,北京100084

出　　处：《公路交通科技》2011年第10期118-123,共6页Journal of Highway and Transportation Research and Development

摘　　要：提供了一种利用颗粒流模型模拟刹车失灵货车驶入避险车道制动床后的运动过程,进而确定制动床长度的方法。所建立的颗粒流模型能够较好地模拟刹车失灵货车驶入避险车道制动床后的运动过程。仿真模拟结果显示,FHWA方法偏不安全,工程设计时制动床长度不应小于FHWA方法计算值;制动床坡度越小,FHWA方法计算出的制动床长度越偏不安全。为不同制动床设计条件下制动床长度的确定提供了一种较为简便、实用的方法。A model based on particle flow simulation for simulating the movement of brake failure trucks entering the arrester bed of truck escape ramp was proposed to determine the length of the arrester bed. The model can perfectly simulate the movement of the brake failure truck after entering the truck escape ramp. The simulation result shows that （ 1 ） FHWA approach is unsafe, and the length of the arrester bed should not less than the calculated value based on FHWA approach ; （2） the smaller the slope of arrester bed, the more unsafe of the calculated length of arrester bed based on FHWA approach. The model provides a simple and practical method to determine the length of arrester beds under different conditions.

关 键 词：交通工程 长大下坡 安全保障工程 避险车道 制动床 颗粒流 

分 类 号：U491[交通运输工程—交通运输规划与管理]