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Stability analysis of newly developed polygonal cross-sections for lattice wind towers
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0002-1818-0914
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0001-6150-7241
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
2018 (English)In: Wind Engineering: The International Journal of Wind Power, ISSN 0309-524X, E-ISSN 2048-402X, Vol. 42, no 4, p. 353-363Article in journal (Refereed) Published
Abstract [en]

The pursuit for cheaper energy is leading the current wind tower design to increased heights. Common wind turbine tower designs would generate unjustified costs for transportation and erection leading to inefficient use of materials. In order to reduce these costs, several simplified erection methods have been proposed. One of such is the hybrid lattice-tubular steel tower. For economic feasibility, built-up cold-formed polygonal cross-sections have been proposed for the lattice part. This article presents a numerical investigation of the failure modes of closed polygonal cross-sections. The first part contains a presentation of structural systems which incorporate elements composed of plates and cold-formed members. The evaluation of the polygonal sections is done by means of finite element analysis considering local and global geometrical imperfections and residual stresses generated in the fabrication procedure. A comparative study is performed between several finite element models to propose a corresponding European buckling curve for calculating the flexural buckling resistance. The results show that the design of polygonal sections can be done according to European buckling curves methodology.

Place, publisher, year, edition, pages
Sage Publications, 2018. Vol. 42, no 4, p. 353-363
Keywords [en]
Cold-formed, finite element simulation, flexural buckling, lattice wind tower, polygonal sections
National Category
Building Technologies
Research subject
Steel Structures
Identifiers
URN: urn:nbn:se:ltu:diva-70193DOI: 10.1177/0309524X18777366Scopus ID: 2-s2.0-85049948088OAI: oai:DiVA.org:ltu-70193DiVA, id: diva2:1236323
Conference
WINERCOST'17 – International Conference On Wind Energy Harvesting 2017, Coimbra, Portugal, 20-21 april, 2017
Note

2018-08-02 (rokbeg);konferensartikel i tidskrift

Available from: 2018-08-01 Created: 2018-08-01 Last updated: 2018-08-08Bibliographically approved

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Sabau, GabrielKoltsakis, EfthymiosLagerqvist, Ove

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