Experimental study on cyclic tensile-compressive behavior of concrete-filled steel tube column for offshore wind turbine jacket structure

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL Thin-Walled Structures Pub Date : 2025-02-27 DOI:10.1016/j.tws.2025.113130

Xiao-Yi Qiu , Xu-Hong Zhou , Shan Gao , Bin Wang , Wei Ren , Yu-Hang Wang

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引用次数: 0

Abstract

Under the coupling effect of wind load and wave load, the corner columns of the offshore wind turbine concrete-filled steel tube(CFST) jacket structure will undergo cyclic tension and compression. The alteration of concrete crack surface contact and the support provided by the filled concrete to the steel tube have resulted in the absence of a precise model capable of accurately describing the behavior of CFST columns under cyclic tensile-compressive loads with different loading paths. Therefore, cyclic tensile-compressive load tests were conducted on a total of 9 specimens under 5 different loading schemes, considering the effects of load amplitude, load level, and number of cycles. The failure modes of the specimens under cyclic tensile-compressive loads were obtained. Analysis of the experimental results revealed that the ultimate capacity and ductility are slightly influenced by the loading schemes. The ultimate capacity is positively correlated with the load level, whereas ductility exhibits a negative correlation with the load level, with ductility being more significantly affected. Additionally, the compressive stiffness of the specimens is notably influenced by the loading schemes; higher load levels result in more pronounced stiffness degradation, with compression having a greater impact than tension. Finally, several existing methods were adopted to predict the ultimate compressive and tensile capacity. The results showed the measured tensile ultimate capacity aligns closely with the measured results, whereas the compressive ultimate capacities are consistently underestimated.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.