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Study on torsional behavior and bearing capacity of tapered concrete-filled double skin steel tubular members
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Shuhong WANG1, Xianghong LIU2, Jiantao WANG3, Qing SUN2, Linlin ZHANG1, Guoqiang LI1
Chinese Journal of Applied Mechanics | 2025, 42(6) : 1270 - 1284
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Chinese Journal of Applied Mechanics | 2025, 42(6): 1270-1284
• Solid Mechanics •
Study on torsional behavior and bearing capacity of tapered concrete-filled double skin steel tubular members
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Shuhong WANG1, Xianghong LIU2, Jiantao WANG3, Qing SUN2, Linlin ZHANG1, Guoqiang LI1
Affiliations
  • 1.State Grid Zhejiang Electric Power Co. , Ltd. , Economic and Technical Research Institute, 310008 Hangzhou, China
  • 2.School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, 710049 Xi'an, China
  • 3.School of Civil Engineering, Xi'an University of Architecture&Technology, 710055 Xi'an, China
Published: 2025-12-15 doi: 10.11776/j.issn.1000-4939.2025.06.007
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Aiming at the demand for torsional capacity of high-power offshore wind power supporting structure, the full-range torsional mechanism of tapered concrete-filled double skin steel tubular（TCFDST）members was examined under the large hollow ratio, high taper degree, and out-of-code diameter-to-thickness（D/t）ratio. The characteristics of torque-angle curve could be divided into the elastic stage, elasticplastic, plastic strengthening stage, and failure stage. Influence of key parameters on ultimate bearing capacity and stiffness was revealed. The hollow ratio and strengths of steel and concrete were positively correlated with the ultimate torque and stiffness；D/t ratios of outer or inner tubes had negative relationship to it；the axial compression ratios had positive relationship within the limited value，and inversely，it was negatively correlative. A method based on laminated tube theory was proposed to calculate the torque-angle curves of TCFDST members. Subsequently，the hierarchical integration method was established and verified based on the Chinese code and relevant literature，for calculating the ultimate torsional capacity of concrete-filled double skin steel tubular members，and the difference of various methods in determining N-T curve was also analyzed. The research results in this paper can provide valuable reference for the application of TCFDST members with large hollow ratios，large taper degree，and out-of-code D/t ratios in wind power projects.

tapered concrete-filled double skin steel tubular member  /  numerical modelling  /  torque distribution mechanism  /  laminated tube method  /  N-T curve
Shuhong WANG, Xianghong LIU, Jiantao WANG, Qing SUN, Linlin ZHANG, Guoqiang LI. Study on torsional behavior and bearing capacity of tapered concrete-filled double skin steel tubular members[J]. Chinese Journal of Applied Mechanics, 2025 , 42 (6) : 1270 -1284 . DOI: 10.11776/j.issn.1000-4939.2025.06.007
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doi: 10.11776/j.issn.1000-4939.2025.06.007
  • Receive Date：2024-04-08
  • Online Date：2026-03-27
  • Published：2025-12-15
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  • Received：2024-04-08
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Affiliations
    1.State Grid Zhejiang Electric Power Co. , Ltd. , Economic and Technical Research Institute, 310008 Hangzhou, China
    2.School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, 710049 Xi'an, China
    3.School of Civil Engineering, Xi'an University of Architecture&Technology, 710055 Xi'an, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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