Roads and Bridges - Drogi i Mosty
20, 4, 2021, 345-358

Comparison of safety barrier parameters in the case of double impact at the same location

Ewa Wicher Mail
Road and Bridge Research Institute, 1 Instytutowa St., 03-302 Warsaw
Dawid Kucharski Mail
Road and Bridge Research Institute, 1 Instytutowa St., 03-302 Warsaw
Published: 2021-11-22

Abstract

The article describes the double impact of a 900-kg passenger vehicle against a steel safety barrier at the same spot. The crash tests were carried out by the IBDiM Crash Test Team at the test site in Inowrocław. The first crash test was carried out on a new steel safety barrier. The second test was performed on the same barrier, damaged in the first impact. The tests reflected situations encountered on the roads when a safety barrier remains unrepaired for a certain time and another accident occurs. Acceleration severity index (ASI) and theoretical head impact velocity (THIV) were chosen as quantitative measures of the consequences of the impact. The analysis of the parameters obtained from both tests showed that the road steel safety barrier retained its safety level after being hit twice by a passenger vehicle. Based on the observations from crash tests of passenger vehicles with safety barriers, the consequences of such collisions in terms of barrier performance often do not require immediate repairs of the deformed barriers.

Keywords


acceleration, acceleration severity index, ASI, crash test, restraint system, theoretical head impact velocity, THIV.

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References


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1. Fig. 1 Protective barrier and test vehicle prior to the first crash test

  Fig. 1 Protective barrier and test vehicle prior to the first crash test
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2. Fig. 1 Protective barrier and test vehicle prior to the first crash test

  Fig. 1 Protective barrier and test vehicle prior to the first crash test
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3. Fig. 2. View of the barrier after the first impact with details of damage at the vehicle collision site

  Fig. 2. View of the barrier after the first impact with details of damage at the vehicle collision site
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4. Fig. 2. View of the barrier after the first impact with details of damage at the vehicle collision site

  Fig. 2. View of the barrier after the first impact with details of damage at the vehicle collision site
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5. Fig. 3 Protective barrier and test vehicle prior to the second crash test

  Fig. 3 Protective barrier and test vehicle prior to the second crash test
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6. Fig. 3 Protective barrier and test vehicle prior to the second crash test

  Fig. 3 Protective barrier and test vehicle prior to the second crash test
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7. Fig. 4. View of the barrier after the second impact with details of damage at the vehicle collision site

  Fig. 4. View of the barrier after the second impact with details of damage at the vehicle collision site
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8. Fig. 4. View of the barrier after the second impact with details of damage at the vehicle collision site

  Fig. 4. View of the barrier after the second impact with details of damage at the vehicle collision site
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9. Fig. 5. Graph of the acceleration ax as a function of time during the first and the second crash test

  Fig. 5. Graph of the acceleration ax as a function of time during the first and the second crash test
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10. Fig. 6. Graph of the acceleration ay as a function of time during the first and the second crash test

  Fig. 6. Graph of the acceleration ay as a function of time during the first and the second crash test
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11. Fig. 7. Graph of the acceleration az as a function of time during the first and the second crash test

  Fig. 7. Graph of the acceleration az as a function of time during the first and the second crash test
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12. Fig. 8. Graph of the average ASI as a function of time during the first and second crash test

  Fig. 8. Graph of the average ASI as a function of time during the first and second crash test
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13. Fig. 9. Graph of the average THIV as a function of time during the first and second crash test

  Fig. 9. Graph of the average THIV as a function of time during the first and second crash test
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Comparison of safety barrier parameters in the case of double impact at the same location

  
Wicher, Ewa; Kucharski, Dawid. Comparison of safety barrier parameters in the case of double impact at the same location. Roads and Bridges - Drogi i Mosty, [S.l.], v. 20, n. 4, p. 345-358, nov. 2021. ISSN 2449-769X. Available at: <>. Date accessed: 04 Dec. 2021. doi:http://dx.doi.org/10.7409/rabdim.021.020.