Banca de DEFESA: ALTAIR PORCINO DOS SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ALTAIR PORCINO DOS SANTOS
DATE: 03/09/2021
TIME: 14:00
LOCAL: https://conferenciaweb.rnp.br/webconf/renata-gomes-lanna-da-silva
TITLE:

Evaluation of the effect of Geometric and Material Nonlinearities in cable-stayed steel towers of Transmission Lines

KEY WORDS:

Advanced analysis; cable structure; space trusses; cable-stayed steel towers; transmission lines

PAGES: 117
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Estruturas
SPECIALTY: Estruturas Metálicas
SUMMARY:

Steel towers have been usually used in electric power transmission lines, whose main function is to support the conducting cables and lightning rods and keep these elements with safe electrical distances, away from the grounded parts. These towers are designed as truss systems with laminated members and some use auxiliary cables for their stability, called cable-stayed towers. The exact analysis of these systems is complex due to the nonlinear behavior produced by the normal forces in the cables, the external forces acting during the large displacements to which these structures are subjected and the non-linear geometry of the cables themselves. Such conditions justify the use of the advanced structural analysis, which takes into account the geometric and material nonlinearities involved in the problem. With the advancement of computational technology in recent decades, it has been possible to develop programs that employ advanced analysis techniques. These programs generate results that are closer to the real behavior of the structures. In this context, the objective of this research work is to evaluate the effects of geometric and material nonlinearities on structural systems formed by cable structures and space trusses, considering their application in cable-stayed towers of transmission lines. The academic program ASTRAS and the commercial program TOWER are used to compare the structural responses in terms of forces, stresses, strains and displacements of numerical examples to confirm the accuracy and effectiveness of the nonlinear analysis method in cable-stayed towers of transmission lines. It is concluded that, when considering the material nonlinearity during the analysis, there is a better use of the resistant capacity of the structural elements. Therefore, the use of an analysis method that considers the geometric and material nonlinearities can enable a reduction in the consumption of raw material used in the production of steel, since this method allows to obtain a more realistic response of the structural behavior and a less conservative design.

BANKING MEMBERS:
Presidente - RENATA GOMES LANNA DA SILVA
Interna - JUNIA NUNES DE PAULA
Externa à Instituição - ADENILCIA FERNANDA GROBÉRIO CALENZANI - UFES
Externo à Instituição - ARMANDO CESAR CAMPOS LAVALL - UFMG
Externo à Instituição - RODRIGO SERNIZON COSTA