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Full-Text Articles in Mechanical Engineering
Conceptual Development Of An Impact-Attenuation System For Intersecting Roadways, Joseph G. Putjenter
Conceptual Development Of An Impact-Attenuation System For Intersecting Roadways, Joseph G. Putjenter
Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research
Longitudinal barriers are commonly used to shield hazards, including stiff bridge rail ends and slopes. In some locations, a secondary roadway intersects the primary roadway within the guardrail’s length-of-need (LON). Some intersections have as little as 15 ft (4.6 m) between the intersection and beginning of the bridge railing, which require short-radius guardrail systems. No short-radius systems have been tested and approved to current impact safety standards for shielding hazards with these conditions.
Site conditions provided by the Nebraska Department of Roads were used to determine the constraints for a new safety treatment for intersecting roadways and include intersection radii, …
Increased Span Length For The Mgs Long-Span Guardrail System, Nicholas A. Weiland
Increased Span Length For The Mgs Long-Span Guardrail System, Nicholas A. Weiland
Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research
Long-span guardrail systems have been recognized as an effective means of shielding low-fill culverts while minimizing construction efforts and limiting culvert damage and repair. The current MGS long-span design provided the capability to span unsupported lengths up to 25 ft (7.6 m) without the use of nested guardrail. The excellent performance of the MGS long-span system in full-scale crash tests suggested that longer span lengths may be possible with the current design.
A detailed analysis of the MGS long-span guardrail system was performed using the finite element software program LS-DYNA®. It was shown that the MGS long-span design …