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LRFD Design and Construction of Shallow Foundations for Highway Bridge Structures (2010) / Chapter Skim
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5.3 Examples Summary
Pages 130-131

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From page 130...
... Overall, the use of the new, recommended resistance factors for the strength limit states resulted in foundations with varied relations to the actual design, i.e., in five cases the designed foundations under the new factors are smaller, and in two cases the foundations are larger. In most cases, the foundations are controlled by limiting eccentricity, especially if the contribution of negative eccentricity is not adopted.
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From page 131...
... 16.0 16.0 Hough (1959 ) 2 Billerica Bridge Central Pier Pier footing on gravel fill Strength 0.50 e 2 /B = 0.50/ B e 3 /L = 0.095/52.4 = 0.0018 52.4 (C2 load, = 0.70)
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Key Terms

  • central pier
  • billerica bridge
  • limiting eccentricity
  • resistance factors
  • natural soil

  • footing rests
  • footing size
  • loading conventions
  • south abutment
  • effective footing

  • transverse loading
  • major improvement
  • limit states
  • varied relations
  • mixed results

  • bridge pier
  • soil parameters
  • aashto design
  • resistance developed
  • design improvement

  • actual design
  • examples referring
  • performance versus
  • design example
  • applicable resistance

  • provides mixed
  • limit state
  • designed foundations
  • factor depends
  • strength limit


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