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Tangent Modulus of Piles Determined from Strain Data

by Bengt H. Fellenius, Univ of Ottawa, Canada,



Document Type: Proceeding Paper

Part of: Foundation Engineering: Current Principles and Practices

Abstract:

When evaluating measurements of strain or telltale shortening of a pile subjected to loading test, precise knowledge of the 'elastic' modulus is necessary. By means of plotting and analyzing the increment of load (or stress) over the increment of strain versus the strain, i.e., the tangent or chord modulus of the stress-strain curve, the modulus can be determined. The paper provides the mathematical background to the analysis and presents examples of the method.

Subject Headings: Pile tests | Load tests | Strain | Stress strain relations | Pile foundations | Load factors | Elastic analysis

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