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A platform for research: civil engineering, architecture and urbanism
Compressive behavior of stiffened steel tubes for wind turbine towers
Abstract Steel tubes adopted in wind turbine towers generally sustain the combination of compression, bending, and torsion loads. The study of compressive behavior is crucial for investigating the combined bearing capacity of the tower and proposing the corresponding design method. Local buckling tends to affect compressive behavior due to the large diameter-to-thickness ratios of the tubes. Thus, the authors proposed a new form of tower based on longitudinally stiffened steel tubes, which were experimentally and analytically studied in this paper. A total of six tube specimens (four stiffened ones and two unstiffened ones) were tested under axial compression. The experimental results indicate that the local buckling of the tube can be substantially prevented by stiffeners and the T-type stiffener exhibits a superior effect. Finite element models were built and validated by the test results, and the parametric analysis was conducted, indicating that the diameter-to-thickness ratio of the steel tube, the yield strength of steel, and the proportion of stiffener area are the prime sensitive parameters affecting the ultimate strength. Ultimate compressive strength prediction methods in design specifications were evaluated. A practical method for calculating the ultimate strength of stiffened steel tubes was subsequently developed in this paper.
Highlights Six steel tube specimens with different stiffener types and diameter-thickness ratios were tested under axial compression. Finite element models were established and validated by the test results. Parametric analysis was conducted and the prime sensitive parameters affecting the ultimate strength were presented. The applicability of calculation methods suggested by several specifications was evaluated. The calculation method for the ultimate axial compressive strength was proposed by parametric and regression analysis.
Compressive behavior of stiffened steel tubes for wind turbine towers
Abstract Steel tubes adopted in wind turbine towers generally sustain the combination of compression, bending, and torsion loads. The study of compressive behavior is crucial for investigating the combined bearing capacity of the tower and proposing the corresponding design method. Local buckling tends to affect compressive behavior due to the large diameter-to-thickness ratios of the tubes. Thus, the authors proposed a new form of tower based on longitudinally stiffened steel tubes, which were experimentally and analytically studied in this paper. A total of six tube specimens (four stiffened ones and two unstiffened ones) were tested under axial compression. The experimental results indicate that the local buckling of the tube can be substantially prevented by stiffeners and the T-type stiffener exhibits a superior effect. Finite element models were built and validated by the test results, and the parametric analysis was conducted, indicating that the diameter-to-thickness ratio of the steel tube, the yield strength of steel, and the proportion of stiffener area are the prime sensitive parameters affecting the ultimate strength. Ultimate compressive strength prediction methods in design specifications were evaluated. A practical method for calculating the ultimate strength of stiffened steel tubes was subsequently developed in this paper.
Highlights Six steel tube specimens with different stiffener types and diameter-thickness ratios were tested under axial compression. Finite element models were established and validated by the test results. Parametric analysis was conducted and the prime sensitive parameters affecting the ultimate strength were presented. The applicability of calculation methods suggested by several specifications was evaluated. The calculation method for the ultimate axial compressive strength was proposed by parametric and regression analysis.
Compressive behavior of stiffened steel tubes for wind turbine towers
Ren, Wei (author) / Zhou, Xu-Hong (author) / Gao, Yuan (author) / Deng, Ran (author) / Wang, Yu-Hang (author) / Jie-Yu (author) / Cao, Yun-Qi (author)
Thin-Walled Structures ; 183
2022-11-16
Article (Journal)
Electronic Resource
English
Segmental Hollow Concrete Filled FRP Tubes (CFFT) for Wind Turbine Towers
| Springer Verlag | 2021