Banca de QUALIFICAÇÃO: LEONARDO ANDRADE BISPO SILVA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : LEONARDO ANDRADE BISPO SILVA
DATE: 25/09/2023
TIME: 09:00
LOCAL: meet.google.com/qdk-qgwx-xqr
TITLE:

Lumped damage models for planar frames nonlinear analysis

KEY WORDS:

Lumped Damage Mechanics; Plane frames; Local buckling; Steel rectangular
hollow section; Progressive collapse; Reinforced concrete.

PAGES: 164
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Estruturas
SUMMARY:

The growing interest in economic and innovative projects has driven the development of new
materials and design concepts that seek more complex and slender structures. In this scenario,
the use of more sophisticated computational methods becomes essential for structural design
and analysis. Usually, such methods utilize the classical finite element formulation with
geometric nonlinearity associated with the general theory of plasticity. However, these analyzes
often use refined meshes, resulting in high computational costs. Alternatively, a recent
nonlinear theory, called Lumped Damage Mechanics (LDM), was introduced in the early
nineties to obtain more realistic and efficient results in the analysis of more complex structures.
In LDM, it is considered that the nonlinear effects and damage of a finite element are
concentrated in plastic hinges located at its extremities. This simplification significantly
reduces the computational cost and makes it viable for application in more complex and
practical analyses. Therefore, the main objective of this work is to develop new models and
applications for nonlinear analysis of plane frames using LDM. In this context, a lumped
damage model is proposed to evaluate local buckling in steel rectangular hollow section,
considering a nonlinear damage evolution, as well as a damage model for reinforced concrete
tension ties. To evaluate the accuracy of the models, the numerical results obtained were
compared with the experimental results available in the literature. The partial results indicate
that the models present behaviors similar to the experimental results. In addition to these
applications, a lumped damage model will also be proposed to analyze the progressive collapse
resistance of reinforced concrete plane frames. Additionally, experimental research will be
conducted to investigate the relationship between stiffnesses due to flexural and tensile cracking
in reinforced concrete beams.

COMMITTEE MEMBERS:
Presidente - ***.485.254-** - DAVID LEONARDO NASCIMENTO DE FIGUEIREDO AMORIM - UFS
Interno(a) - 1640290 - WAYNE SANTOS DE ASSIS
Externo(a) à Instituição - HIGOR SÉRGIO DANTAS DE ARGÔLO - UFS