Numerical studies on the influence of selected construction features and road conditions on the performance of road cable barriers

Bruski, Dawid; Witkowski, Wojciech

doi:10.1051/matecconf/201823101003

Cited by 8 publications

(3 citation statements)

References 4 publications

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“…In the study conducted by Yilmaz et al [11], the motorcyclist protection barrier system was optimized, as a result safer and more economical sections were obtained. Moreover, such as, improving crash cushion systems that provide road safety [12], ASI value of cable barrier for different speeds [13], determining the danger levels of obstacles such as traffic lights, trees, lighting poles, rocks, ditches, etc. that threaten roadside safety [14], and comparing the ASI-THIV values and AIS-HIC values [15][16] [17], these studies were carried out with the help of real crash tests and FE analyses.…”

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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“…Other than steel guardrails and concrete barriers mentioned above, there are studies related to roadside safety. Such as, improving crash cushion systems that provide road safety, 11 ASI value of cable barrier for different speeds, 12 determining the danger levels of obstacles such as traffic lights, trees, lighting poles, rocks, ditches, etc. that threaten roadside safety, 13 and comparing the ASI-THIV values and AIS-HIC values, [14][15][16] these studies were carried out with the help of real crash tests and FE analyzes.…”

Section: Introductionmentioning

confidence: 99%

Criteria inadequacy of the vehicles used for the calculation of safety parameters in the EN1317-TB11 test

Özcanan

Ozcan

2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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Road restraint systems-RRS are passive safety designs installed on roadsides to ensure the safety of errant vehicle passengers as well as pedestrians. The adequacy of these systems is assessed through full-scale vehicle crash testing for which evaluation criteria are determined by standards such as EN1317. Recently the same RRS is crash tested two times with two different 900 kg passenger cars and test results varied significantly. After a failed crash test instead of modifying the barrier test vehicle was replaced and the same test was repeated. It was surprising to see that the failed RRS this time satisfied the EN1317 evaluation criteria. Despite the use of the same mass vehicle in the crash tests, the different results obtained were a source of motivation for investigating the inadequacy of EN1317. In this study, the adequacy of the 900 kg vehicle criteria used in the determination of the safety parameters in the EN1317-TB11 test was investigated by creating validated finite element-FE models. After the FE analysis it was concluded that test vehicle properties, such as vehicle mass and velocity provided in EN1317 are deemed to be insufficient and more explicit vehicle selection parameters, given in the study, are needed to provide safer and more uniform crash testing results.

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“…Knowledge about this wire rope and its properties is crucial, helping to better understand and analyze vehicular impacts on cable barriers. So far, research has mainly focused on evaluations of the performance of the whole safety system [ 33 , 34 ]. To the best of the author’s knowledge, the only studies on the properties of the 3 × 7 19-mm wire rope have been published by the team led by Reid [ 20 , 35 , 36 ].…”

Section: Introductionmentioning

confidence: 99%

Determination of the Bending Properties of Wire Rope Used in Cable Barrier Systems

Bruski

2020

Materials

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This paper presents research on the bending properties of 3 × 7 19-mm wire rope commonly used in road cable barriers. A total of 19 experimental tests were conducted. In addition, two nonlinear 3D numerical models of the wire rope using beam and solid finite elements were developed. Based on these models, four numerical simulations were carried out. The numerical results were validated against the experimental ones and a very good agreement was obtained. The main result of the research is the determination of the moment–curvature relationship for the wire rope considered. The effect of prestretching on the rope performance is discussed. The numerical results are analyzed in this paper in detail, including the behavior of the wire rope under bending and analyses of the cross-sectional and contact stresses. Suggestions concerning the type of finite element for wire rope modeling are also given. The results can be used, for example, in numerical simulations of crash tests of cable barriers.

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Numerical studies on the influence of selected construction features and road conditions on the performance of road cable barriers

Cited by 8 publications

References 4 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

Criteria inadequacy of the vehicles used for the calculation of safety parameters in the EN1317-TB11 test

Determination of the Bending Properties of Wire Rope Used in Cable Barrier Systems

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