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Proceedings Paper

Determination of bridge foundation type from structural response measurements
Author(s): Kenneth R. Maser; Masoud Sanayei; Abba Lichtenstein; Steven B. Chase
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Paper Abstract

Evaluation of bridge substructures for vulnerability to scour or other potential sources of damage requires knowledge of foundation conditions beneath piers and abutments that are often unknown. This paper presents a potential method for determining unknown foundation conditions which is simple and inexpensive. The method is based on strain and rotation measurements which are used to compute a stiffness matrix for the unknown foundation. The stiffness coefficients in the matrix are then matched with values previously determined for known foundations. The objective of the reported work has been to demonstrate the feasibility of this method. Finite element models for representing pile and spread footing conditions have been used to characterize the difference in stiffness properties between the two foundation types. Field measurements of strains, displacements, and rotations have been taken on two bridges in Massachusetts: one with a spread footing and the other with a pile foundation. Parameter estimation models have been developed and used in conjunction with this field data to calculate the foundation stiffness properties. The paper describes the models, the numerical results, and the results of field testing.

Paper Details

Date Published: 31 March 1998
PDF: 13 pages
Proc. SPIE 3400, Structural Materials Technology III: An NDT Conference, (31 March 1998); doi: 10.1117/12.300125
Show Author Affiliations
Kenneth R. Maser, Infrasense Inc. (United States)
Masoud Sanayei, Tufts Univ. (United States)
Abba Lichtenstein, Consultant (United States)
Steven B. Chase, Federal Highway Administration (United States)

Published in SPIE Proceedings Vol. 3400:
Structural Materials Technology III: An NDT Conference
Ronald D. Medlock; David C. Laffrey, Editor(s)

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