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Ultimate strength of box girder considering plastic accumulation characteristics under cyclic loading
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Jin PAN1, 2, De-gong ZHANG2, Zhao-jun SONG1, 2, Ren-jie XU3
Journal of Ship Mechanics | 2025, 29(12) : 1919 - 1929
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Journal of Ship Mechanics | 2025, 29(12): 1919-1929
• Structural Mechanics •
Ultimate strength of box girder considering plastic accumulation characteristics under cyclic loading
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Jin PAN1, 2, De-gong ZHANG2, Zhao-jun SONG1, 2, Ren-jie XU3
Affiliations
  • 1.Key Laboratory of High Performance Ship Technology (Wuhan University of Technology), Ministry of Education, Wuhan 430063, China
  • 2.School of Naval Architecture, Ocean and Energy Power Engineering, Wuhan University of Technology, Wuhan 430063, China
  • 3.Marine Design and Research Institute of China, Shanghai 200011, China
Published: 2025-12-15 doi: 10.3969/j.issn.1007-7294.2025.12.009
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In order to explore the plastic accumulation characteristics of box girders under cyclic hogging and sagging bending moment loads and to study the attenuation law of ultimate strength of box girders based on incremental plastic failure, this paper creatively designed a test device for continuous cyclic bending moment loading, and carried out a series of four-point bending ultimate strength tests on box girders under different loading conditions based on replaceable box girder specimen. Combined with numerical simulation, this study analyzed the variation characteristics of cumulative plasticity critical point, cumulative plastic deformation and neutral axis height of box girders under cyclic loading, and then the influence of constant and variable amplitudes of rotation angle loads on the ultimate strength attenuation of box girders was evaluated. After these investigations, the fluctuating range for the ultimate bearing capacity of ships encountering random extreme waves bending loads was determined to ensure the safety and reliability of ships sailing in severe sea conditions.

box girder  /  ultimate strength  /  plastic accumulation  /  model test
Jin PAN, De-gong ZHANG, Zhao-jun SONG, Ren-jie XU. Ultimate strength of box girder considering plastic accumulation characteristics under cyclic loading[J]. Journal of Ship Mechanics, 2025 , 29 (12) : 1919 -1929 . DOI: 10.3969/j.issn.1007-7294.2025.12.009
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Year 2025 volume 29 Issue 12
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Article Info
doi: 10.3969/j.issn.1007-7294.2025.12.009
  • Receive Date：2025-05-23
  • Online Date：2026-07-07
  • Published：2025-12-15
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  • Received：2025-05-23
Affiliations
    1.Key Laboratory of High Performance Ship Technology (Wuhan University of Technology), Ministry of Education, Wuhan 430063, China
    2.School of Naval Architecture, Ocean and Energy Power Engineering, Wuhan University of Technology, Wuhan 430063, China
    3.Marine Design and Research Institute of China, Shanghai 200011, 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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