Investigation of stiffening scheme effectiveness towards buckling stability enhancement in tubular steel wind turbine towers

Stavridou, Nafsika; Efthymiou, Evangelos; Gerasimidis, Simos; Baniotopoulos, Charalampos

doi:10.12989/scs.2015.19.5.1115

Cited by 13 publications

(6 citation statements)

References 17 publications

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“…For the modelled geometries the four-nodded doubly curved shell element S4R with reduced integration and finite membrane strains was adopted as it has shown to perform well in similar structures (Stavridou et al, 2015;Lee and Bang, 2013). For the selected mesh, a convergence study has been performed prior to the analysis.…”

Section: Tubular Towermentioning

confidence: 99%

“…Contemporary tower design of constantly greater height, requires increase in the thickness of steel shells; thus increased material used for their construction. Several groups have worked on the introduction of stiffeners inside tubular structures in order to ameliorate their structural performance while maintaining the overall shell thickness at the same level (Dimopoulos and Gantes, 2012;Rebelo et al, 2012a;Rebelo et al, 2012b, Stavridou et al, 2013Stavridou et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Structural analysis and optimal design of steel lattice wind turbine towers

Stavridou

Koltsakis

Baniotopoulos

2019

Proceedings of the Institution of Civil Engineers - Structures

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Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document.When citing, please reference the published version. Take down policyWhile the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

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Section: Tubular Towermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural analysis and optimal design of steel lattice wind turbine towers

Stavridou

Koltsakis

Baniotopoulos

2019

Proceedings of the Institution of Civil Engineers - Structures

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“…Required structural design verifications are described in pertinent recommendations [24][25][26][27] and guidelines [28][29][30]. Issues that have attracted particular attention include the arrangement of stiffening rings to improve buckling resistance [31][32][33], measures to recover the lost strength and stiffness due to the man-door opening near the tower base [34][35][36][37][38] and the design of ring flange connections between consecutive segments [39,40]. Extensive research efforts have been directed towards structural analysis and design methods [41][42][43][44][45][46][47], as well as towards optimizing the design to achieve reduced tower weight and cost [10,[48][49][50][51].…”

Section: Introductionmentioning

confidence: 99%

A Novel Tripod Concept for Onshore Wind Turbine Towers

Gantes

Billi

Güldogan³

et al. 2021

Energies

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A wind turbine tower assembly is presented, consisting of a lower “tripod section” and an upper tubular steel section, aiming at enabling very tall hub heights for optimum exploitation of the wind potential. The foundation consists of sets of piles connected at their top by a common pile cap below each tripod leg. The concept can be applied for the realization of new or the upgrade of existing wind turbine towers. It is adjustable to both onshore and offshore towers, but emphasis is directed towards overcoming the stricter onshore transportability constraints. For that purpose, pre-welded individual tripod parts are transported and are then bolted together during erection, contrary to fully pre-welded tripods that have been used in offshore towers. Alternative constructional details of the tripod joints are therefore proposed that address the fabrication, transportability, on-site erection and maintenance requirements and can meet structural performance criteria. The main structural features are demonstrated by means of a typical case study comprising a 180-m-tall tower, consisting of a 120-m-tall tubular superstructure on top of a 60-m-tall tripod substructure. Realistic cross-sections are calculated, leading to weight and cost estimations, thus demonstrating the feasibility and competitiveness of the concept.

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“…Several researchers studied this research topic and proposed various methods to strength the tower structure in order to either decrease the cost of the tower or improve its structural response. Stavridou et al [11] examined ring stiffeners and vertical stiffening schemes to eliminate the presence of short wavelength buckles of the tower due to bending. Gkantou et al [12] performed the life cycle assessment of tall hybrid onshore steel wind turbine towers.…”

Section: Introductionmentioning

confidence: 99%

Study of the Bearing Capacity of Stiffened Tall Offshore Wind Turbine Towers during the Erection Phase

Yang

Baniotopoulos

2020

Energies

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Offshore wind energy is a rapidly maturing renewable energy technology that is poised to play an important role in future energy systems. The respective advances refer among others to the monopile foundation that is frequently used to support wind turbines in the marine environment. In the present research paper, the structural response of tall wind energy converters with various stiffening schemes is studied during the erection phase as the latter are manufactured in modules that are assembled in situ. Rings, vertical stiffeners, T-shaped stiffeners and orthogonal stiffeners are considered efficient stiffening schemes to strengthen the tower structures. The loading bearing capacity of offshore monopile wind turbine towers with the four types of stiffeners were modeled numerically by means of finite elements. Applying a nonlinear buckling analysis, the ultimate bearing capacity of wind turbine towers with four standard stiffening schemes were compared in order to obtain the optimum stiffening option.

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Investigation of stiffening scheme effectiveness towards buckling stability enhancement in tubular steel wind turbine towers

Cited by 13 publications

References 17 publications

Structural analysis and optimal design of steel lattice wind turbine towers

Structural analysis and optimal design of steel lattice wind turbine towers

A Novel Tripod Concept for Onshore Wind Turbine Towers

Study of the Bearing Capacity of Stiffened Tall Offshore Wind Turbine Towers during the Erection Phase

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