Stress Relaxation Under Various Stress and Drainage Conditions

Gilberto Alexandre (1) , Ian Martins (1)

1 COPPE-UFRJ - Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia

This paper presents predictions made for stress relaxation tests carried out by Garcia (1996) in the edometric apparatus in a soft organic clay from Rio de Janeiro, Brazil. The predictions were made based on the framework of the model developed by Martins (1992), as modified by Alexandre (2006), and in agreement with concepts and ideas developed by Terzaghi (1941), Taylor (1942) and others. The differential equation of the stress relaxation test, its solution, the assessment of the parameters of the model as well as predictions made for all tests are shown in this paper. It is shown that satisfactory agreement between predictions and tests results were obtained for the soft clay tested by Garcia (1996). In addition, discussions about stress relaxation tests carried out under different conditions (triaxial and hydrostatic) and about the variation of K0 during stress relaxation and secondary consolidation are also presented in this paper.

Mots clés: Stress relaxation; Constitutive equations; Soil behavior; Rate effects; Time Effects; Viscosity; Adsorbed water layer; K0

Domaines: Génie civil

Gilberto Alexandre, Ian Martins. Stress Relaxation Under Various Stress and Drainage Conditions. 2012. ⟨hal-00879838⟩