Banca de DEFESA: FREDERICO TADEU CASTRO MENDES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : FREDERICO TADEU CASTRO MENDES
DATA : 24/08/2017
HORA: 16:00
LOCAL: Centro Federal de Educação Tecnológica de Minas Gerais
TÍTULO:

DETERMINAÇÃO DAS PROPRIEDADES MECÂNICAS DAS LIGAÇÕES VIGA-PILAR COM CHAPAS DE EXTREMIDADE ESTENDIDA VISANDO À ANÁLISE PELO MÉTODO DOS COMPONENTES

PALAVRAS-CHAVES:

Steel structure, semi-rigid connection, Components Method, bolted beam-to-column connection, extended end-plates.

PÁGINAS: 175
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
SUBÁREA: Estruturas
RESUMO:

Traditionally, the behavior of the connections is idealized as rigid or flexible to facilitate analysis and structural design. However, most of the connections have semi-rigid behavior, situated between these two extreme cases. The knowledge of the real behavior of the beam-to-column connections provides the establishment of new design recommendations for the determination of its mechanical properties and, consequently, the development of structural design procedures that consider this hypothesis. The connections between beams and columns have a great influence on the overall behavior of the structures, whether in terms of rigidity, resistance, or stability. The incorporation of these connections in the structural analysis requires a representation of moment-relative rotation curves, which is capable of describing their behavior through the action of requesting efforts, mainly the transmission of bending moment. This paper aims to study the semi-rigid behavior of beam-to-column connections, based on the mechanical model via the Components Method, presented in European Standards EN 1993 1 8: 2005, aiming at the determination of the moment x relative-rotation curve as a function of stiffness parameters, resistance, and rotational capacity of bolted connections with extended end plate and transverse stiffeners in the core of the abutment. Analysis procedures for the evaluation of these parameters are also presented using the criteria of Brazilian Standards ABNT NBR 8800: 2008 supplemented, where necessary, by international standards and recommendations. It is observed that the brazilian standard provides a more conservative design of the connection as compared to the results obtained by the European standard. Finally, a numerical example of a flat gantry with beam-to-column connection with extended end plate and transversal stiffeners in the column core, varying only in the thickness of the plate, is analyzed, aiming to evaluate the influence of the behavior of these connections in the distribution of the structural forces, nodal displacements, and the overall stability of the structure. It is concluded that, while it is common for designers to consider the connections with extended end plates as rigid, the structural responses of such connections may be quite different from the idealized behavior.

MEMBROS DA BANCA:
Externo à Instituição - ARMANDO CESAR CAMPOS LAVALL - UFMG
Presidente - CLAUDIO JOSE MARTINS
Interno - PETER LUDVIG
Interno - RENATA GOMES LANNA DA SILVA