Research on the optimal structural parameter of interrupted type concrete straight-road barrier with certain length concrete frusta
(0) A kind of new interrupted type concrete straight-road barrier with certain length concrete frusta having special request for mountain area highway is presented by engineering department. In order to obtain optimal size parameters of such a interrupted type concrete straight-road barrier with certain length concrete frusta, the dynamic explicit finite element analysis (EFEA) is performed. Taking the passengers head injury criterion HIC value, a orthogonal design table L25(56) is used for simulation tests aiming at the five design variables of the interrupted type concrete straight-road barrier. The analysis of variance for the results of the 25 simulation tests is dealt with by using the SPSS (Statistical package for the social science), and the optimization design parameters of the interrupted type concrete straight-road barrier are given. It is pointed that the interrupted type concrete straight-road barrier still has three main problems. Firstly, tires are easily scraped by concrete frusta. This conditions account for 15 groups among which the tires in 11 groups are scraped to come off. Secondly, vehicles collide with concrete frusta directly, and the deformations of barrier steel tube are grave, which account for 2 groups, HIC value is far more than 1000.Thirdly, the tire is intact, the barrier is entire, but HIC value still exceeds 1000, this conditions account for 6 groups. There are only 2 groups meet the request of the tires intact, barrier integrity and HIC value less than 1000 among the results of 25 groups. The results also suggest that the structural parameters affect the barrier mechanics characteristic significantly. As long as the design parameter are reasonable, the interrupted type concrete straight- road barrier with certain length concrete frusta having special request for mountain area highway presented by engineering department can also has stronger energy-absorbing capacity, and a certain oriented ability to lead the control losing vehicle returns to the right drive direction at the same time.
Traffic engineering Concrete barrier Impact Orthogonal design Analysis of variance SPSS
Zhengbao Lei Lan Liu Haiqi Yan Jinxiu Yu Zhigang Zhou
College of Automotive & Mechanical Engineering, Changsha University of Science and Technology, Chang Key Laboratory for Highway Engineering of Ministry of Education, Changsha University of Science and Engineering Research Center of the Road Transportation Safety and Disaster Prevent & Mitigation, Min Hunan Province Highway Bureau, Changsha 410001, China
国际会议
国际断裂力学2007年会(Fracture Mechanics and Applications 2007)
长沙
英文
249-258
2007-11-01（万方平台首次上网日期，不代表论文的发表时间）