Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Use of Guardrails on Low Fill Bridge Length Culverts
When multiple box culverts span over 20 ft, they are defined by AASHTO as bridge length and thus normally require the use of a full strength rigid bridge rail. The use of a rigid bridge rail creates a transition problem between the flexible metal beam guard fence which is commonly used upstream of the bridge rail. It was believed that more post could be used with a shallow embedment to achieve the desired guardrail strength. A metal beam guard fence design of this type was crash tested in the study and proved to be unsatisfactory. Another concept investigated was to rigidly mount steel guard fence post (with blockout) to the top of the culvert deck when full soil embedment could not be achieved. A design of this type was also crash tested in the study and proved to be satisfactory.
Use of Guardrails on Low Fill Bridge Length Culverts
When multiple box culverts span over 20 ft, they are defined by AASHTO as bridge length and thus normally require the use of a full strength rigid bridge rail. The use of a rigid bridge rail creates a transition problem between the flexible metal beam guard fence which is commonly used upstream of the bridge rail. It was believed that more post could be used with a shallow embedment to achieve the desired guardrail strength. A metal beam guard fence design of this type was crash tested in the study and proved to be unsatisfactory. Another concept investigated was to rigidly mount steel guard fence post (with blockout) to the top of the culvert deck when full soil embedment could not be achieved. A design of this type was also crash tested in the study and proved to be satisfactory.
Use of Guardrails on Low Fill Bridge Length Culverts
T. J. Hirsch (Autor:in) / D. Beggs (Autor:in)
1987
62 pages
Report
Keine Angabe
Englisch
Long-Span Nested W-Beam Guardrails over Low-Fill Culverts
| British Library Online Contents | 1992
| Engineering Index Backfile | 1963
Guardrail Connection for Low-Fill Culverts
| British Library Online Contents | 2003