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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Soil pressure on box culverts
Author(s): Maher K. Tadros and Joseph V. Benak
Publication: Structural Journal
Appears on pages(s): 439-450
Keywords: box beams; culverts; finite element method; loads (forces); reinforced concrete; soil pressure; specifications; strength method; structural analysis; structural design; working stress method; strength; Structural Research
Abstract:Study critically examines the provisions of the American Association of State Highway and Transportation Officials' (AASHTO) "Standard Specifications for Highway Bridges," relative to design of reinforced concrete box culverts. This paper deals specifically with two topics: soil pressures and design methods. The soil pressure analysis was performed by finite element modeling taking into account soil-structure interaction. The analysis confirms previous field observations that the AASHTO provisions considerably underestimate soil loading. Formulas are proposed for prediction of more realistic soil pressures. Influence of the proposed soil pressures on culvert size and reinforcement is demonstrated by numerical examples. Both the working stress design and the strength design methods are employed. It is shown that, even with the increase in soil pressures as suggested, use of the more rational strength design method could result in material savings.
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