Vehicle Impact Analysis of Flexible Barriers Supported by Different Shaped Posts in Sloping Ground

A roadside guardrail may be constructed near slopes. The desired safety behavior is ensured not only by the guardrail structure itself, but also by the interaction between soil and guardrail post. In the case of horizontal ground, the elastic Winkler spring model and the p-y curve approach can be us...

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Bibliographic Details
Published in:Advances in Mechanical Engineering 2014-01, Vol.6, p.705629
Main Authors: Lee, Dong W., Ahn, Jae S., Woo, Kwang S.
Format: Article
Language:English
Subjects:
Barriers
Computer simulation
Deflection
Deformation
Finite element analysis
Grounds
Guardrails
Mathematical models
Moisture content
Risk
Shear strength
Shear tests
Slopes
Software
Studies
Tension tests
Vehicles
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Summary:A roadside guardrail may be constructed near slopes. The desired safety behavior is ensured not only by the guardrail structure itself, but also by the interaction between soil and guardrail post. In the case of horizontal ground, the elastic Winkler spring model and the p-y curve approach can be used to estimate the soil-post interaction by the finite element method. However, it is difficult to apply those models with the sloping ground cases unless sufficient experimental data are given through the single post impact tests. This paper evaluates, using LS-DYNA software, the vehicle impact performance of flexible barriers made of steel W-Beam guardrails in sloping ground that are also supported over three different types of post configurations. The dynamic performance is tested in terms of maximum deflection, absorbing impact energy, and occupant risk index according to post types.
ISSN:1687-8132
1687-8140
1687-8140
1687-8132
DOI:10.1155/2014/705629