Banca de QUALIFICAÇÃO: LEONARDO TOLEDO FERREIRA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : LEONARDO TOLEDO FERREIRA
DATE: 04/11/2021
TIME: 14:30
LOCAL: LCCV/CTEC/UFAL
TITLE:

NUMERICAL ESTIMATION OF IMPACT PRESSURE ON SOIL-STRUCTURE
INTERACTIONS WITH THE MATERIAL POINT METHOD

KEY WORDS:

impact pressure; soil-structure interaction; numerical simulation; computational
dynamics; material point method.

PAGES: 84
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Estruturas
SPECIALTY: Mecânica das Estruturas
SUMMARY:

Many structures are under the risk of impact with natural hazards such as mudslides,
avalanches, and submarine landslides. In the oil and gas industry, as example, the assessment
of the positioning of pipelines must consider the risk of impact with submarine landslides, as
an impact with such phenomena could cause leakage that would lead to severe economic
and socioenvironmental losses. Therefore, a study of the impact of natural hazards upon
structures is necessary. That study must begin from the resistance parameters associated
with the impact events, among which impact pressure stands out. That parameter is difficult
to measure in practice, however, as experimental studies with centrifuges are hard to carry
out, and field measuring is, in most cases, impracticable. Besides, the utilization of analytical
solutions is overly restrictive in the presence of physical and geometric nonlinearities. Thus,
numerical simulations come as a viable alternative, as they expand from basic physics
principles and are not limited by the same apparatus and space restrictions as the laboratory
and field measurements. The expanding processing capabilities of modern computers is
another argument in their favor. Among numerical methods, the material point method
(MPM) stands out, as it has the capacity to simulate large deformation and displacement,
which are common in impact events. To utilize the MPM, an investigation of the numerical
procedure for the computation of the impact pressure is performed, as that procedure is not
shared in the literature, although used by many authors. Limitations of possible solutions
for this problem are explored in this manuscript, as well as suggestions of alternative ways
of computing the impact pressure parameter. The analyses are performed in the context of
classic problems, such as the study of cone penetration (T-bar), and the impact of submarine
landslides upon subsea infrastructure via synthetic models.

BANKING MEMBERS:
Interno - 1120928 - ADEILDO SOARES RAMOS JUNIOR
Interno - 1121260 - EDUARDO NOBRE LAGES
Externo à Instituição - DIOGO TENORIO CINTRA
Externo à Instituição - TIAGO PEIXOTO DA SILVA LOBO