Banca de QUALIFICAÇÃO: PLÊNYO NAHEN GONZAGA ARAUJO
Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.DISCENTE : PLÊNYO NAHEN GONZAGA ARAUJO
DATA : 28/04/2022
HORA: 10:00
LOCAL: SALA 303 - PGTEC
TÍTULO:
Numerical modeling static liquefaction of aeolian dune sand in a critical state framework
PALAVRAS-CHAVES:
NorSand, critical state, static liquefaction, dune sand
PÁGINAS: 25
RESUMO:
Static liquefaction failure of sloping grounds has resulted in significant damage to built structures and loss of lives. Often, constitutive models, through a Finite Element approach, are used to identify the risks. NorSand is a constitutive model based on critical state soil mechanics for particulate materials that integrate the state parameter into its constitutive framework to model dense and loose sands material with the same parameter set. Importantly, it can identify the liquefaction potential by simulating softening behavior due to pore pressure increase of loose soils in undrained conditions. This work aims to validate the drained and undrained behavior of aeolian dune sand from Natal, Brazil, and predict static liquefaction. The geotechnical software PLAXIS was used to perform the model. The model was validated by comparing simulations to 16 real drained and undrained tests performed on contractive and dilative samples. Undrained triaxial tests were performed at a confining pressure equal to p’0 = 100 kPa in loose states to show the model performance. The results showed the ability of the model to simulate liquefaction failure resulting from the excess pore pressure in undrained stress paths, along with the capability to dilate and compact in drained triaxial compression.
MEMBROS DA BANCA:
Interno - 2085750 - FAGNER ALEXANDRE NUNES DE FRANCA
Interno - 1149451 - OLAVO FRANCISCO DOS SANTOS JUNIOR
Interno - 1692497 - OSVALDO DE FREITAS NETO