Scale Model Study of Pile Foundations Under Earthquake Excitation

[+] Author and Article Information
L. Boyce

The University of Texas at San Antonio, San Antonio, TX 77849

D. D. Kana

Southwest Research Institute, San Antonio, TX 78284

J. Energy Resour. Technol 115(1), 47-55 (Mar 01, 1993) (9 pages) doi:10.1115/1.2905969 History: Received September 11, 1991; Revised August 25, 1992; Online April 16, 2008


Similitude theory is used to develop scale models for determining the earthquake response of pile foundations embedded in overconsolidated clay. The model is compared with full-scale foundations embedded in natural soil, for which dynamic response measurements had been made in previous work. Correlation of the model and prototype earthquake response constitutes a major difference in this work over previous efforts using scale models. Gravity effects are included in the models by scaling pile and soil material properties. The model pile material is selected to provide the correctly scaled stiffness and mass properties. The required model soil properties are achieved by developing a mixture of bentonite, aerosil, and veegum. Elastic properties of the model soil are compared with those of the prototype by standard momotonic stress and cyclic stress soil tests. It is found that scaling considerations must also apply to supporting static soil tests for determining soil properties, as well as to the model piles for measurement of dynamic responses. Soil property nonlinearities are shown to be distorted by geometric effects. However, a method is developed to account for the distortion as long as excitation waveforms are similar. The successful correlation of pile data extends the relationship between frequency parameter and relative soil strain to much higher strain levels than those obtained in the prototype tests. Therefore, the potential for a significant savings in future investigative work is demonstrated with scale model testing.

Copyright © 1993 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In