Static and dynamic analysis of telecommunication towers subjected to wind
DOI:
https://doi.org/10.33448/rsd-v11i4.27279Keywords:
Telecommunication towers; Wind loads; Numerical modeling.Abstract
The expansion of the telecommunications sector in Brazil in recent years and the consequent increase in demand for telecommunication towers open space for a discussion about the guidelines to be taken during the execution of projects of this type of structure. Because they are light and slender structures, wind loads become preponderant for the design of these towers and wind analysis is an important topic to be discussed. Thus, this work analyzes design aspects employing numerical modeling and parametric studies. The Brazilian standard NBR 6123:1988 was used to obtain the wind speed and its static and dynamic loads, to compare the responses generated by each of the methods. Then, this process was repeated following the European standard IEC 60826:2017, to compare the results between the two standards methods. A parametric study was also performed with towers of different heights to better understand the structure behavior. The tower responses were obtained using the finite element software SAP2000, in which a lattice tower model with a constant square section was developed, to which the wind loads calculated according to the aforementioned standards were applied. The results showed that each analysis method generates considerably different results, revealing that this is a point that should be very well studied during the design of telecommunication towers.
References
Almeida, D. C. D., & Vidoto, T. A. H. (2013). Comparative analysis of the static and dynamic methods of wind action in reinforced concrete slender buildings according to NBR 6123/1988 (Bachelor thesis, Federal Technological University of Paraná). (in Portuguese)
AISC Committee. (2010). Specification for structural steel buildings (ANSI/AISC 360-10). American Institute of Steel Construction, Chicago-Illinois.
AISI. (2016). North American specification for the design of cold-formed steel structural members (AISI S100-16). American Iron and Steel Institute, Washington, DC, USA.
Antunes, P., Travanca, R., Varum, H., & André, P. (2012). Dynamic monitoring and numerical modelling of communication towers with FBG based accelerometers. Journal of Constructional Steel Research, 74, 58-62.
ASCE. (2015). Design of latticed steel transmission structures (ASCE 10-15). American Society of Civil Engineers, Reston, Virginia, USA.
ABNT. (1988). NBR 6123. Wind loads on buildings. Brazilian Association of Technical Standards, Rio de Janeiro. (in Portuguese)
ABNT. (2008). NBR 8800. Design and execution of steel structures for buildings. Brazilian Association of Technical Standards, Rio de Janeiro. (in Portuguese)
Bezas, M. Z., Jaspart, J. P., Vayas, I., & Demonceau, J. F. (2022). Design recommendations for the stability of transmission steel lattice towers. Engineering Structures, 252, 113603.
Blessmann, J. (2013). The wind in structural engineering. UFRGS Publisher. (in Portuguese)
Bolina, C. C., Palechor, E. U. L., & Vásquez, M. P. R. (2015). Vibrations: the estimated and experimental natural frequencies of a structure. Blucher Mathematical Proceedings, 1(1), 186-194. (in Portuguese)
Bronzatto, A. F. L. (2012). Wind loads in slender structures for telecommunications: comparison between static and dynamic analyses proposed by NBR 6123/1988 (Bachelor's thesis, Federal University of Rio Grande do Sul). (in Portuguese)
Carril Júnior, C. F. (2000). Numerical and experimental analysis of the dynamic wind effect on lattice towers for telecommunications (PhD thesis, University of São Paulo).
Carvalho, H. (2015). Wind effects on transmission lines (PhD thesis, Federal Univesiry of Minas Gerais).
Filipe, J. C. I. (2012). Parametric study of wind action on telecommunication towers (Master thesis). (in Portuguese)
IEC. (2017). Design criteria of overhead transmission lines (IEC 60826). International Electrotechnical Commission, Geneva, Switzerland.
Lins, B. F. E. (2013). The evolution of the internet: A historical perspective. Aslegis Notebooks, 48, 11-45. (in Portuguese)
Machado, E. L., Pinto, E. L. (2016). Comparison between static and dynamic wind analysis in a self-supporting steel tower. Latin American Congress on Steel Construction, São Paulo, Brazil. (in Portuguese)
Mendes, V. R. V. (2020). Structural verification of a lattice suspension tower according to IEC 60826 criteria (Master thesis, Federal University of Minas Gerais). (in Portuguese)
Oliveira, B. D. A. S., & Silva, J. G. S. (2016). Modeling the dynamic structural behavior of telecommunications steel towers subjected to the non-deterministic dynamic action of wind loads. CILAMCE 2016. (in Portuguese)
Oliveira, C. C. (2019). Evaluation of the behavior of structural systems of transmission lines subjected to wind action (Master thesis, Federal University of Minas Gerais). (in Portuguese)
Oliveira, C. C., Carvalho, H., Mendes, V. R. V. (2019). Evaluation of forces due to wind on overhead transmission line cables according to different methodologies. XVIII ERIAC, Foz do Iguaçu, Brazil. (in Portuguese)
Reis, E. D. (2020). Design criteria for overhead transmission line structures in Minas Gerais (Master thesis, Federal University of Minas Gerais). (in Portuguese)
Reis, E. D., Souza, D. L. C. E., Carvalho, H., Montenegro, P. A., & Ribeiro, D. (2021). Structural safety and stability of the bridge on the Paraopeba river in Moeda, Minas Gerais, Brazil: Case study. Practice Periodical on Structural Design and Construction, 26(1), 05020012.
Silva, L. L. F. D. (2018). Análise dinâmica de estruturas submetidas a forças devidas ao vento (Bachelor thesis, Federal Rural University of the Semi-Arid). (in Portuguese)
Szafran, J., Juszczyk, K., & Kamiński, M. (2019). Experiment-based reliability analysis of structural joints in a steel lattice tower. Journal of Constructional Steel Research, 154, 278-292.
Torres, F. C., Inoue, H. (2021). Structural analysis and dimensioning of power transmission lines. XII Brazilian Congress of Bridges and Structures. (in Portuguese)
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Copyright (c) 2022 Unathan Kayke de Paula; Luiz Fernando Rasuck de Carvalho; Elvys Dias Reis; Deysiane Antunes Barroso Damasceno
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