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PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING
Design of a Lattice Wind Tower and a Comparison of the Structural Response With and Without a TMD
J.M. Henriques and R.C. Barros
Department of Civil Engineering, Faculty of Engineering of the University of Porto, Portugal
J.M. Henriques, R.C. Barros, "Design of a Lattice Wind Tower and a Comparison of the Structural Response With and Without a TMD", in , (Editors), "Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 45, 2013. doi:10.4203/ccp.102.45
Keywords: lattice, tower, wind, response, dynamic, tuned-mass damper, vibration, control.
This paper considers the issues relating to the modelling and design of a latticed wind tower 150 meters high. Then a comparative study of the response of a latticed wind tower is presented when subjected to natural winds with and without a TMD.
The actions considered during this type of tower design were the wind actions, combined with the action of ice, and the seismic actions. The lattice tall tower geometry was defined by the authors interacting with the metallic company Metalogalva (Trofa, Portugal). The geometry was to satisfy the required characteristics for the tower to support a wind turbine. The metallic calculations were achieved with by iteratively using Autodesk Robot Structural Analysis Professional, with a program to calculate the wind actions. The latter program was developed by the authors. As expected with this type of tower, the actions that conditioned the design were the wind action combined with ice.
A simplified method for quantifying the dynamic action on these structures is adopted, with the purpose of studying techniques for vibration control of the along-wind response in terms of displacements and accelerations.
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