Development of a Heavy Containment Level Bridge Rail for Istanbul

Atahan, Ali Osman

doi:10.1590/1679-78254684

Cited by 10 publications

(4 citation statements)

References 4 publications

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“…The plate ( 7) is fixed on the ground surface by the four screws, generically called connection parts (4). The plate welds the lower side of the supporting U-post, the plate welds the gusset (8) Considering the guardrail system is mounted on a bridge, the distance between the supporting posts is 1.5 m, and the total length is 18 m.…”

Section: W-beam Modelmentioning

confidence: 99%

Numerical analysis and evaluation of a semi-heavy guardrail system

Gheres,

Cordos,

Todorut

2024

IOP Conf. Ser.: Mater. Sci. Eng.

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The continuous increase in traffic accidents, following the rise in the number of vehicles in traffic and their speed, requires the development of research on the design of active and passive safety systems. This research mainly aims to compare the performance of commonly used passive safety systems (semi-heavy W-beam guardrails) mounted on roadside and pedestrian bridges to protect vehicles and pedestrians. It is intended to reduce the deformations of the vehicle upon impact with the protective device mounted between the roadside and the pedestrian area for the protection of the vehicle occupants; reduce the parapet working width for the pedestrian’s safety; and maintain the vehicle’s trajectory from the moment of impact to the final movement, between the guardrail and the median axis of the road, to ensure the protection of other road users. A CAD model of the vehicle-guardrail scenario was developed to achieve these objectives. Load simulation cases are performed using the finite element method according to the European standards SR EN 1317 for impact tests of vehicles - TB 42, recommended for semi-heavy guardrails.

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Section: W-beam Modelmentioning

confidence: 99%

Numerical analysis and evaluation of a semi-heavy guardrail system

Gheres,

Cordos,

Todorut

2024

IOP Conf. Ser.: Mater. Sci. Eng.

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“…The design of these types of guardrails involves minimum lateral deformations and bringing the vehicle back on the road with minimal damage. A comparative crash impact study is performed in the real environment and simulated in Ls-Dyna, respecting the impact 1220 (2022) 012049 IOP Publishing doi:10.1088/1757-899X/1220/1/012049 2 conditions described according to the TB11 for impact with a vehicle with a 900 kg mass and TB31 on impact with an articulated HGV with a mass of 37390 kg [4].…”

Section: Introductionmentioning

confidence: 99%

Crash testing and evaluation of W-beam guardrail using finite elements method

Gheres

Scurtu

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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On public roads, the guardrails represent the most used passive protection devices in the case of road accidents. Their role is to absorb the car impact energy. This paper presents and analyses tests of a W-beam guardrail type placed on the roadside using the finite element method. The introduction of the paper presents the state of the art, the requirements and the standards used for guardrails testing and crash test methods. In the second part of the paper is achieved the CAD model of the parapet and the impactor used to create the crash test. In the third part of this study, the boundary conditions of the guardrail structure and impactor are created for two cases of speed (80 and 110 km/h) at 20 degrees angles of impact, according to the SR EN 1317 standard. The fourth part proposes a new guardrail model changed by adding a new shock-absorber element and the distance between the poles is increased after visualization and interpretation of the obtained results of the guardrail structure. The new guardrail structure is tested at the same boundary condition as the base structure. The conclusions are highlighted in the last part of the study.

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“…Wilde et al 7 in their study, it was determined that the transition regions of steel guardrails to different levels are the most critical regions in terms of ASI-THIV values, in their analysis with the help of finite elements (FE). Atahan 8 in his study aiming to improve the ASI value for bridges and viaducts in Istanbul of the newly developed YIM04 heavy bridge guardrail system; TB11 and TB81 full capacity real crash test and FE simulations of the designed system were carried out within the scope of EN 1317, and numerical and experimental results were compared. The ASI value obtained in the TB11 tests was measured as 1.2 (class B), and it was stated that this value was acceptable for bridge guardrails.…”

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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Development of a Heavy Containment Level Bridge Rail for Istanbul

Cited by 10 publications

References 4 publications

Numerical analysis and evaluation of a semi-heavy guardrail system

Numerical analysis and evaluation of a semi-heavy guardrail system

Crash testing and evaluation of W-beam guardrail using finite elements method

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

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