Feasibility of segmented concrete in wind turbine tower: Numerical studies on its mechanical performance

Yue, Yanchao; Tian, Jingjing; Mu, Qingyi; Chen, Tangbing; Lin, Peng; Lu, Xi; Liu, Jing

doi:10.1177/1056789520954895

Cited by 4 publications

(1 citation statement)

References 33 publications

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“…In the case of a new (replacement) structure, high-strength concretes should be used, which enable particularly thin-walled, slender and overall resource-efficient cross-sections [5]. Since both types of structures are suitable for prefabrication (segmented bridge cross-sections and wind turbine towers) [6,7], they are also predestined for the use of ultra-high-strength concretes [8,9]. The significantly thinner-walled and more slender cross-sections lead to a reduced dead weight andwith concistently high or even increasing fatigue loadsto a more sensitive fatigue behaviour.…”

Section: Introductionmentioning

confidence: 99%

Fatigue resistance of concrete – Influence of time-dependent scattering of compressive strength

Voß,

Schmidt,

Oettel

2024

Preprint

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In terms of sustainability and resource efficiency, concrete structures such as bridges and wind turbines should be used as long as possible and – in the case of new constructions (as a replacement) – the cross-sections should be as slender and thin-walled as possible using high-performance or ultra-high performance concrete. A further development of the fatigue design would be useful both for the verification of a possible longer remaining service life and for a safe, but also for economical and sustainable design of these engineering structures, which are particularly exposed to fatigue. The verifications of structural safety for non-static loading of concrete in the national and international design codes and standards provide for high safety margins, particularly for concretes with high strengths. These result, among other things, from the large scatter of the number of cycles to failure in experimental fatigue tests. In this article, current verifications of structural safety for non-static loading of concrete are presented, results of compressive tests on concrete specimens of different strengths, geometries and test boundary conditions are summarised in a database and the scatter of the experimentally determined number of cycles to failure is statistically evaluated. In addition, the compressive strength of concrete, which significantly influence the scatter of the numbers of cycles to failure, are statistically analysed for concretes of different ages. From this, a continuous description of the strength development and its scatter is derived. Finally, the compressive stress levels of the previously analysed fatigue tests are adjusted using a stochastic approach in order to take into account the scatter of the compressive strength of concrete as a function of the concrete age. By applying the time-dependent scatter of the compressive strength of concrete, a significant reduction in the scatter bandwidth of the analysed numbers of cycles to failure in the S-N curve is achieved.

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Section: Introductionmentioning

confidence: 99%

Fatigue resistance of concrete – Influence of time-dependent scattering of compressive strength

Voß,

Schmidt,

Oettel

2024

Preprint

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Conceptual design of a prestressed precast UHPC-steel hybrid tower to support a 15 MW offshore wind turbine

Zhou,

Chen,

Shen

et al. 2024

Engineering Structures

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Closed-Form Solution of Fundamental Frequency of Steel-Concrete Hybrid Wind Turbine Tower

Zhou

Wang

et al. 2022

Int. J. Str. Stab. Dyn.

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With the development of wind power energy, the steel-concrete hybrid tower has been gradually popularized as the onshore tall wind turbine tower. To avoid the resonant response that brings violent damage to the wind turbine tower, the fundamental frequency of the hybrid tower must be carefully analyzed. This study develops a closed-form solution of the fundamental frequency of the hybrid tower, where the abrupt changes of cross-section and material properties, the effect of prestressing, and the mass and rotary inertia of the wind turbine are taken into account. It provides an effective way to obtain the fundamental frequency in the preliminary design of the hybrid tower. The effectiveness of the proposed solution is validated by comparing it with the results of finite element analysis, showing good agreement. By using the proposed solution, a parametric analysis is conducted to investigate the variation rules of the fundamental frequency to the design parameters. It indicates that with the variation of the proportion of the concrete/steel segments, the correlations between the fundamental frequency and the design parameters also change significantly. The parametric analysis conducted herein may provide instructive guidelines to adjust the parameters in the preliminary design of the hybrid tower.

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Feasibility of segmented concrete in wind turbine tower: Numerical studies on its mechanical performance

Cited by 4 publications

References 33 publications

Fatigue resistance of concrete – Influence of time-dependent scattering of compressive strength

Fatigue resistance of concrete – Influence of time-dependent scattering of compressive strength

Conceptual design of a prestressed precast UHPC-steel hybrid tower to support a 15 MW offshore wind turbine

Closed-Form Solution of Fundamental Frequency of Steel-Concrete Hybrid Wind Turbine Tower

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