Time-dependent microplane model for creep of cohesive soils

Pere C. Prat*, Zdenek P. Bazant

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

The microplane model is used in this paper to describe the time-dependent (creep) behavior of cohesive soils (clays). The constitutive equations are defined on each of a set of microplanes which cover all possible spatial orientations, with a kinematic constraint to the macroscopic response. The total strain components are assumed to be the sum of a time-independent and a time-dependent (creep) contribution. The creep evolution laws are defined within the framework of the rate process theory (activation energy principle), in which the strain rates depend on the current stress level, temperature and time. The model can reproduce instantaneous as well as time-dependent behavior, for drained or undrained conditions. Numerical results show good qualitative agreement with laboratory test data taken from the literature. The paper closes by discussing the implementation of the model in finite element codes.

Original languageEnglish (US)
Title of host publicationMechanics Computing in 1990's and Beyond
EditorsHojjat Adeli, Robert L. Sierakowski
PublisherPubl by ASCE
Pages1224-1228
Number of pages5
ISBN (Print)0872628043
StatePublished - Jan 1 1991
EventASCE Engineering Mechanics Specialty Conference - Columbus, OH, USA
Duration: May 20 1991May 22 1991

Other

OtherASCE Engineering Mechanics Specialty Conference
CityColumbus, OH, USA
Period5/20/915/22/91

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Prat, P. C., & Bazant, Z. P. (1991). Time-dependent microplane model for creep of cohesive soils. In H. Adeli, & R. L. Sierakowski (Eds.), Mechanics Computing in 1990's and Beyond (pp. 1224-1228). Publ by ASCE.