Banca de DEFESA: ARTHUR DA SILVA REBOUCAS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ARTHUR DA SILVA REBOUCAS
DATA : 24/03/2017
HORA: 08:00
LOCAL: Auditório do CTEC
TÍTULO:

LIVE LOAD DISTRIBUTION ANALYSIS IN CURVED REINFORCED CONCRETE BRIDGE


PALAVRAS-CHAVES:

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


PÁGINAS: 160
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
SUBÁREA: Estruturas
RESUMO:

Nowadays, due to the density of cities and the demand for infrastructure, the need to build bridges and curved viaducts has intensified. However, the structural analysis of this bridge deck geometries still needs more contributions, especially in optimization of load distribution in this type of deck or in the comparison between the use of straight and curved girders, in beam and slab and box girders bridges. Therefore, the main objective research is analyze the behavior of 3 different structural systems of curved reinforced concrete bridges, evaluating the bending moment live load distribution in the most critical longitudinal position of the structure. To identify this position, the influence lines were determined as a function of the radius of curvature and the length of each bridge studied. Afterwards, 15 numerical models were constructed using FEM by CSI Bridge V17 program and an analysis of existing analytical models for curved beam and slab bridges (V-Load method) and curves box girder bridges (M/R method) was performed in order to evaluate the variation of the live load distribution varying the curvature of the bridge centerline, the existence or not of support diaphragms and the structural analysis method. All the studies were performed using Brazilian truck load “TB-450” defined by NBR 7188: 2013. The analytical methods presented overestimated results in all cases analyzed for the outside girders. The live load distribution of bending moment is optimized through the insertion of support diaphragms, in bridges wtih tee beams, such distribution presents a greater variation of load share than in bridges with box girder section, in which there is an approximate equal distribution. In addition, it was found that in all structural systems, with increase of the curvature, there is an increase in the load distribution factor at the outside girder.


MEMBROS DA BANCA:
Presidente - 1515200 - JOSE NERES DA SILVA FILHO
Interno - 1891124 - FRANCISCO ADRIANO DE ARAUJO
Interno - 1451817 - JOEL ARAUJO DO NASCIMENTO NETO
Externo à Instituição - ALINE DA SILVA RAMOS BARBOZA - UFAL
Notícia cadastrada em: 20/03/2017 11:24
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