A modified three-beam guardrail system has been used along the US highway system as a high containment barrier. The system is designated as SGR09b by the American Association for State Highways and Transportation Officials (AASHTO), and it was developed to improve the performance of existing three-beam guardrail against heavy vehicle impacts. After its first development, the guardrail system was installed in Rhode Island, Colorado, Nebraska and Michigan to evaluate and monitor its in-service performance. Previous crash tests on the system showed that the system is effective in containing and redirecting vehicles including 2000 kg pickup truck, 8000 kg single unit truck, 9100 kg school bus and 14500 kg intercity bus. This paper describes details of a computer simulation study performed on a modified three-beam high containment level guardrail designated as SGR09b. Because the SGR09b guardrail system is the only high containment guardrail system passing the NCHRP Report 350 TL4 requirements in its class, developing an accurate finite element model for this guardrail is deemed to be a significant contribution towards enhancement of computer-simulated virtual roadside safety research. For this reason, a detailed finite element model of the SGR09b guardrail system has been developed and subjected to 8000 kg single unit truck impact under NCHRP Report TL4 conditions. The fidelity of the simulation study was evaluated using the full-scale crash test results. As in the full-scale crash test, in the finite element simulation study, the guardrail system successfully contained and redirected the 8000 kg single unit truck. Based on the crash test results, it was determined that the finite element models for both the SGR09b guardrail system and the 8000 kg single unit truck are fairly accurate and can be used with confidence in further computer-simulated virtual roadside safety research. When semi-rigid roadside barrier systems are considered, the SGR09b guardrail system has been listed as the only guardrail system that passed the NCHRP Report 350 TL4 requirements in its class. This means that among the other semi-rigid guardrail systems, SGR09b is the only system that can safely contain and redirect vehicles up to 8000 kg in weight. Currently, there is no finite element model that exists for the SGR09b guardrail system to be used in crash test simulation studies.


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    Titel :

    Crash test simulation of a modified three-beam high containment level guardrail under NCHRP Report 350 TL 4-12 conditions


    Beteiligte:
    Cansiz, Omer F. (Autor:in) / Atahan, Ali O. (Autor:in)


    Erscheinungsdatum :

    2006


    Format / Umfang :

    17 Seiten, 12 Bilder, 1 Tabelle, 6 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch