Tesis
ANÁLISE DE TORRES DE LT CONSIDERANDO A INTERAÇÃO SOLO-ESTRUTURA
Date
2012-03-05Registration in:
MILANI, Alisson Simonetti. THE SOIL-STRUCTURE INTERACTION IN TRANSMISSION LINES
LATTICED STEEL TOWERS ANALYSES. 2012. 198 f. Dissertação (Mestrado em Engenharia Civil) - Universidade Federal de Santa Maria, Santa Maria, 2012.
Author
Milani, Alisson Simonetti
Institutions
Abstract
The mechanical model usually adopted in the design of transmission lines (TL)
latticed steel towers is very simple, using spatial truss and frame elements, and
solved by a linear static or non-linear geometric analysis. In the event of rupture of a
conductor cable or a shield wire the loading is considered through static equivalent
loads , and foundations are usually modeled how undeformable supports. This work
evaluated the response of two TL latticed steel towers subjected to the cable rupture,
considering the influence of foundation flexibility in the model and type of analysis,
i. e., with a dynamic analysis in time domain and a static analysis with the static
equivalent loads , usually adopted in design practice. In dynamic analysis, direct
explicit numerical integration of the equations of motion in the time domain was
adopted, using the central finite differences scheme, and the model included all
components of a TL: the towers, the conductor cables, the shield wires, the insulator
strings and the foundation elements, in order to evaluate the influence of boundary
conditions on the results. Finally, the results of dynamic analysis of towers, in terms
of displacements at the top, support reactions and maximum loads in some selected
bars are compared with the results of static analysis.