Nonlinear p-y relationships of reinforced concrete and steel fiber added reinforced concrete piles in medium dense sand

Akdag C. T., ÖZDEN G., Stopper J.

BAUTECHNIK, vol.91, no.9, pp.609-621, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 91 Issue: 9
  • Publication Date: 2014
  • Doi Number: 10.1002/bate.201200068
  • Journal Name: BAUTECHNIK
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.609-621
  • Keywords: model piles, p-y curves, lateral load, lateral-axial loading, steel fiber reinforced concrete, moment-curvature, loading rate, soil-structure interaction
  • Dokuz Eylül University Affiliated: Yes


The primary goal of this study is to investigate the influence of nonlinear pile material behavior on soil-pile interaction (SPI), an aspect of SPI which was not studied extensively for reinforced concrete (RC) piles. For this purpose a model pile test program was implemented, which involved testing of RC piles and RC with steel fiber piles. The steel fiber ratio by volume was decided as 1 % based on previous experience. Prior the model pile tests, bending tests were made on flexural elements to obtain the moment-curvature relationship of piles. Therefore, the influence of pile bending stiffness was taken into consideration in the p-y curve analyses. The effects of loading rate and axial load on soil-pile interaction were evaluated. It is concluded that axial load significantly increases the soil-pile stiffness of the RC pile. Rate of loading considerably alters the p-y curve of RC pile whereas it slightly influences the p-y curve of RC with steel fiber pile. A new methodology to improve currently accepted p-y curve establishment procedures is suggested by incorporating pile flexibility parameters into the formulation.