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Determination of the Capability of a Side Bearing Block Foundation as a Fixed Support to Resist Overturning


A side bearing block foundation is used to resist overturning moments and later forces. Theoretical and experimental investigations were made to determine the ultimate moment capacity of a 3'x3'x7' reinforced concrete footing subjected to vertical and horizontal loads and an overturning moment.

The theoretical ultimate moment capacity was assumed to occur when the ultimate soil resistance was reached along the side bearing walls. It was found that the resultant friction force at the base of the foundation greatly influenced the capacity of the foundation to resist an overturning moment.

The experimental ultimate moment capacity was determined from a load-deflection curve obtained from field data.

A theoretical ultimate moment capacity was determined with the use of a finite element computer program.

The results from each of the three determinations were in acceptable agreement. Recommendations for further study are made.

  • Date Published: May, 1986
  • Publication Number: WA-RD 84.1
  • Last Modified: June 23, 2007
  • Authors: Harold C. Sorensen, Richard Toreh.
  • Originators: Washington State University. Dept. of Civil and Environmental Engineering. Structural Engineering Section, Washington State Transportation Center (TRAC)
  • # of Pages: 118 p., 2,856 KB (PDF)
  • Subject: Computer programs, Earth pressure, Field tests, Footings, Finite element method, Foundations, Foundation engineering, Lateral supports, Loads, Moments (Mechanics), Overturning, Piles (Supports), Reinforced concrete, Soil mechanics.
  • Keywords: Footing, overturning, stability, soil mechanics, foundations, piles, finite element, soil pressure.
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This abstract was last modified April 29, 2008