Introducing Two Effective Modifications for Pastor-Zienkiewicz Model for Improvement of Dynamic Simulation Capability of Granular Soils

مهندسی عمران فردوسی

Article 5, Volume 32, Issue 1 - Serial Number 25, April 2019, Pages 73-92   

Document Type: پژوهشی

DOI: 10.22067/civil.v32i1.63664

Author

Amin Iraji^*

Urmia University

Abstract

Two effective modifications were introduced for Pastor-Zienkiewicz (PZ) model to improve the prediction of dynamic behavior of granular soils. The first modification was implementation of degradation effect for dense granular soils under cyclic loading, and the second was improvement of ratcheting effect for granular soils under cyclic loading. Three cyclic triaxial tests and three cyclic plane strain test were used to validate the introduced modifications. Predictions of stress versus strain for both of modifications were satisfactory. However, predictions of volumetric strain for the second modification were better than those of the first modification.

Keywords

Generalized plasticity theory; modification of constitutive law; dense granular soils; simulation of cyclic loading; degradation; Ratcheting

Supplementary Files

5-iraji - Revised.pdf

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