Banca de DEFESA: VALBERLLAN ALBUQUERQUE RIBEIRO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : VALBERLLAN ALBUQUERQUE RIBEIRO
DATA : 17/06/2019
HORA: 08:45
LOCAL: Sala de videoconferência do anexo da Sinfo
TÍTULO:

EVALUATION OF THE INFLUENCE OF CURVATURES AND
DIAPHRAGMS IN THE DISTRIBUTION OF THE BENDING MOMENT DUE TO
THE LIVE LOAD IN CURVED BRIDGES OF REINFORCED CONCRETE.


PALAVRAS-CHAVES:

Bridges; Live Load Distribution Factor; Analytical Methods; Finite
Element Method.


PÁGINAS: 350
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
SUBÁREA: Estruturas
ESPECIALIDADE: Estruturas de Concreto
RESUMO:

The structural analysis of bridges with curved longitudinal geometry presents
greater complexity when compared to with straight bridges. This fact is due to a
series of consequences caused by the interaction between the bending moment
and the torsion moment. This makes torsion requests considerable, where they can
condition the dimensioning and stability of the structure, as well as causing the
increased distortion of the cross section of the element, generating transverse and
longitudinal stresses that cannot be neglected. In view of this, the main objective of
this research is to carry out a parametric study on the Influence of curvatures and
the insertion of support transversal (diaphragms) in bridges with curved longitudinal
trajectory in the horizontal plane, in the distribution of bending moment in the spars.
Thus, for the analysis of the behavior of bridges, numerical models using the Finite
Element Method (FEM) using the software CsiBridge v20 will be used, as well as
validated by the V-Load analytical method. The analysis of the results showed that
the inclusion of the support transversal (diaphragm) made the bending moment
distribution more balanced for most of the analyzed models. The curvature effect
significantly altered the distribution of the BMDF in the beams along the cross
section of curved bridges, showing a trend of progression of these factors as it
approaches the girder most external to the curve. Such behavior is attributed to the
coupled effects of the bending moment and torsion moment in the curved girders.
In addition, the curvature induces a complex state of tensions, since these
structures are subjected to twist combined with bending and shearing. In addition,
regarding the influence of the TI's associated to the effect of the monolithic
systems, there is a tendency of equivalence in the load distribution of the bridges
as the quantity of TIs is increased for both precast and in situ molded construction
methods. Finally, with respect to the V-Load Method, although it has been used in
the past for open-section curved bridges, results of very discrepant bending
moment distribution are presented when compared with the MEF results.


MEMBROS DA BANCA:
Presidente - 1515200 - JOSE NERES DA SILVA FILHO
Interno - 2087565 - RODRIGO BARROS
Externo à Instituição - LORENZO AUGUSTO RUSCHI E LUCHI - UFES
Notícia cadastrada em: 07/06/2019 15:09
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