Banca de DEFESA: PAULO LEITE SOUZA JUNIOR

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : PAULO LEITE SOUZA JUNIOR
DATA : 21/06/2019
HORA: 10:30
LOCAL: Auditório do CTEC
TÍTULO:

DRAINED AND UNDRAINED BEHAVIOR OF AN AEOLIAN SAND FROM NATAL/RN.

PALAVRAS-CHAVES:

Triaxial test, dune sand, critical state, steady state.

PÁGINAS: 78
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
SUBÁREA: Geotécnica
RESUMO:

The behavior of sands under various loading conditions has been study object in de last decades. Constitutive models able to simulate the behavior of sands have been formulated into the Critical State framework. Researchers showed that the Critical State Line (CSL) can be obtained by drained and undrained tests in samples with different initial densities. This work aims to check drained and undrained behavior of a eolic sand of Natal/RN into the Critical State Soil Mechanics. The drainded and undrained tests were carried out with samples at initial void ratio at 0,6, 0,7 and 0,8, which corresponds to dense , moderately dense and loose states, repectivelly. Tests were conducted under
confining pressures of 50, 100, 200 and 300 kPa to each molding void ratio. The results showered that a CSL was defined from drained and undrained test in loose and moderated dense sand. The samples of dense sand were not used to define de CSL considering that critical state was not attained at a axial deformation of 20%. The Critical State parameters was obtained using the projections in p’-q and lnp’-v planes. The critical state friction angle of 31,5° is consistent with clean, angular to subangular, quartzite an uniform sands. Were obtained values of 1,26, 1,863 and 0,03 to parameters M, Γ and λ, respectively. The obtained parameters will contribute to analysis and
numerical simulations of geotechnical structures built on aeolian deposites of dunes at Natal/RN.

MEMBROS DA BANCA:
Externo à Instituição - FRANCISCO CHAGAS DA SILVA FILHO - UFC
Presidente - 1149451 - OLAVO FRANCISCO DOS SANTOS JUNIOR
Interno - 1692497 - OSVALDO DE FREITAS NETO