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An Advanced Cap Model for Soil

[+] Author Affiliations
C. S. Tsai, Ching-Shyang Chen, Zhen-Yu Zhang, Bo-Jen Chen

Feng Chia University, Taichung, Taiwan, R. O. C.

J. C. Chen

Lawrence Livermore National Laboratory, Livermore, CA

Paper No. PVP2003-2118, pp. 179-185; 7 pages
doi:10.1115/PVP2003-2118
From:
  • ASME 2003 Pressure Vessels and Piping Conference
  • Seismic Engineering
  • Cleveland, Ohio, USA, July 20–24, 2003
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4157-X
  • Copyright © 2003 by ASME

abstract

Soil, which is a pressure-sensitive material, is frequently encountered in the engineering profession. To ensure the safety of super-structures, it is prerequisite to fully understand the mechanical behavior of soil. The stress-strain relation of soil is highly nonlinear and complex. Therefore, problems involving soil need an appropriate constitutive model to describe its stress-strain relationship. This paper presents a new cap-type constitutive law for soil. The model is prominent in the sense that it satisfies the compatibility between the failure surface and the yield cap. It has modified the classical cap model to obtain smooth yield surfaces. In addition, the model effectively describes strength variations along various directions on the octahedral plane. The model has shown to realistically simulate soil responses in experiments by 7 parameters. The proposed concept can also be extended to include as many previous models published in the past for describing various observed material behavior as it is required.

Copyright © 2003 by ASME
Topics: Soil

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