Abstract
The main purpose of any road restraint system is saving human life and minimizing injuries. The efficiency of road restraint system is its capability to hold vehicle on the road, to decrease occupant injuries and damage to the impacted objects. The road restraint systems currently used in Lithuania meet the European Standard EN 1317. Acceleration Severity Index (ASI) and Theoretical Head Impact Velocity (THIV) are derivative values used in this standard mainly to describe simulation of vehicle and safety barrier impact situations and to study vehicle crash dynamics. This paper presents simulation of different situations of vehicle and road restraint system crash. Computer impact simulation analysis was performed as well as comparable investigation of conventional injury criterions Head Impact Criteria (HIC) and those used in the European Standard EN 1317.
Highlights
With Lithuania‘s entering the European traffic system and getting involved into an international market of traffic services the amount of road vehicles, their flows and speeds are increasing right along with the crash probability
Modern passive road safety structures ensure rather effective absorption of excessive vehicle energy, prevent vehicle runs-off, correct vehicle movement trajectory and do ISSN 1822-427X print / ISSN 1822-4288 online http://www.bjrbe.vgtu.lt not allow it to move away from the road. Both in Lithuania and European Union (EU) rigid, half-rigid or deformed road structures used during vehicle crash develop different reaction forces (Bayton et al 2009; Bogdevičius, Prentkovskis 2001)
The United States procedures are prescribed in NCHRP Report 350 (Ross et al 1993), the European Committee for Standardization (CEN) procedures are presented in the European Standard EN 1317-2:1998 Road Restraint Systems – Part 2: Performance Classes, Impact Test Acceptance Criteria and Test Methods for Safety Barriers
Summary
With Lithuania‘s entering the European traffic system and getting involved into an international market of traffic services the amount of road vehicles, their flows and speeds are increasing right along with the crash probability. Modern passive road safety structures ensure rather effective absorption of excessive vehicle energy, prevent vehicle runs-off, correct vehicle movement trajectory and do ISSN 1822-427X print / ISSN 1822-4288 online http://www.bjrbe.vgtu.lt not allow it to move away from the road Both in Lithuania and European Union (EU) rigid, half-rigid or deformed road structures used during vehicle crash develop different reaction forces (Bayton et al 2009; Bogdevičius, Prentkovskis 2001). The aim of this work was to create numerical models, enabling to quickly and rather reliably evaluate behavior of safety barrier during the impact with vehicle Though such simulation is a task of large scope and time-consuming, it gives a possibility to solve and evaluate much more problems – mechanical characteristics of the repaired barriers, behavior during a crash, natural weather and road conditions, influence of road geometry or soil, reliability of bolted joints, etc
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