The Researches of Effectiveness of Road Restraint Systems

Borkowski, W.; Hryciów, Z.; Rybak, Piotr; Wysocki, J.

doi:10.2478/v10040-008-0136-1

Cited by 6 publications

(5 citation statements)

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“…Borovinsek et al [20], in their studies investigating the reliability of FE simulations for roadside safety, error values of less than 8% were obtained between FE simulation values and real collision values, and it was argued that FE simulations could be used in this sense. Borkowski et al [21] compared the TB11 test with the real crash test and LS-DYNA FE simulation according to some criteria within the scope of EN 1317 standard and emphasized that the LS-DYNA FE model can be used. Niezgoda et al [22] in their studies on the use of computer-assisted software in modeling and simulation of crash tests, it was recommended that numerical and experimental tests largely confirm each other, and the use of computer-aided software in crash tests would be convenient.…”

Section: Figure 1 -(A) Concrete Barriers (Rigid) (B) Steel Guardrails...mentioning

confidence: 99%

Finite Element Analysis and Investigation of Critical Impact Point of Steel Guardrails Affecting Safety and Structural Performance

Özcanan

2023

Turkish Journal of Civil Engineering

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After the guardrails are designed, the structural adequacy and safety criteria are determined by the relevant standards and full-scale crash tests. One of the widely used standards is European Norm 1317 (EN1317). Guardrail systems generally consist of rails and posts. The guardrails are more rigid around the posts, which are mounted on the ground or embedded in soil at certain intervals. Therefore, it is important for driver/passenger and roadside safety to determine the most critical point in terms of structural and safety performance and design according to the most unfavorable situation. With this motivation, in this study, the effect of different impact points on the structural and safety performance of the H1W4 guardrail was investigated by finite element (FE) analysis. For this purpose, first of all, the finite element models of the H1W4-A system were calibrated and validated with real crash test data. Then, with the help of the validated models, analyses were completed for different impact points as 0.5, 1.0, 1.5 and 2.0 meters with a half-meter difference for the standard 2-meter post spacing. In the light of the measured safety parameters such as Acceleration Severity Index (ASI), Theoretical Head Impact Velocity (THIV) and structural performance criteria such as working width (W) and exit angle (α), the critical impact point for the guardrail was determined. Contrary to what is generally known, crashing vehicles into flexible points (0.5 and 1.0 m) rather than impacting rigid points (1.5 and 2.0 m) creates a more negative situation in crash tests.

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Section: Figure 1 -(A) Concrete Barriers (Rigid) (B) Steel Guardrails...mentioning

confidence: 99%

Finite Element Analysis and Investigation of Critical Impact Point of Steel Guardrails Affecting Safety and Structural Performance

Özcanan

2023

Turkish Journal of Civil Engineering

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“…Numerical simulations were carried out using finite element code with explicit time integration. This method is widely used in modelling vehicle collision against various types of road restrained systems [11][12][13][14]. Validation procedures have been described in European Standards [3,4], their direct use can be found in [15,16].…”

Section: Crash Test Assemblymentioning

confidence: 99%

On the influence of the acceleration recording time on the calculation of impact severity indexes

et al. 2018

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The paper concerns with the analysis of normative requirements pertaining to experimental setup of a crash test and its numerical modelling. An overview of parameters describing the collision of a vehicle with a road restraining system is presented. A short description of a concrete road safety barrier is presented. A brief description of numerical modelling procedures for crash tests is given as well. The parametric influence analysis is performed of the acceleration recording time on various crash test functionality parameters The simulations are carried out using LS-DYNA finite element code with a solver version R.8.1

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“…Several studies have been conducted to prove the capability of a computer system to simulate full-scale crash tests on road safety barriers. Borkowski et al 10,11 presented the results of simulation crash tests on a concrete barrier based on European standard EN 1317 and proved the possibility of using simulation methods for analyzing and evaluating road safety barriers. Atahan 12 used the numerical method to demonstrate how simulations could replace experimental tests for a strong-post W-beam guardrail system.…”

Section: Figure 1 Presents Some Images Of Roadside Barriersmentioning

confidence: 99%

Development and validation of a finite element model for road safety barrier impact tests

2016

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Road safety barriers are roadside structures installed on certain sections of the road to improve highway safety by preventing a vehicle from leaving the road and colliding with roadside hazards. Road safety barriers are an effective solution for reducing the risk of injuries on modern roads. A road safety barrier must meet minimum standards of construction and materials design. Normally, they must undergo crash tests according to the European standard EN 1317 or the Manual for Assessing Safety Hardware by the American Association of State Highway and Transportation Officials. On the basis of these standards, each safety barrier must pass standardized crash tests as mandated in their approval procedures. Currently, computer simulation methods are typically used by researchers to analyze the performance of roadside safety barriers. Advancement in computer technology could facilitate the finite element method in replacing expensive experimental tests. This paper presents an approach for constructing and evaluating a finite element model for road safety barriers according to European standard EN 1317 by using the finite element code LS-DYNA. Excellent agreement between real-world test data and simulation results was achieved for behavior and impact severity values. The results obtained using the model ensure the exactness of the proposed method and prove that the numerical method is a practical approach for eliminating road safety barrier problems. Furthermore, the model was able to replace experimental tests for developing road safety barriers, thus reducing time and money.

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The Researches of Effectiveness of Road Restraint Systems

Cited by 6 publications

References 0 publications

Finite Element Analysis and Investigation of Critical Impact Point of Steel Guardrails Affecting Safety and Structural Performance

Finite Element Analysis and Investigation of Critical Impact Point of Steel Guardrails Affecting Safety and Structural Performance

On the influence of the acceleration recording time on the calculation of impact severity indexes

Development and validation of a finite element model for road safety barrier impact tests

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