Study of similarity characteristic for the buckling process of box girders subjected to bending load

FU Weicheng; LIU Zhongquan; KONG Xiangshao; ZHOU Hu; WU Weiguo

doi:10.19693/j.issn.1673-3185.02551

Volume 18 Issue 3

Jun. 2023

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Chinese Journal of Ship Research > 2023 > 18(3): 173-185. > DOI: 10.19693/j.issn.1673-3185.02551 CSTR: 32390.14.j.issn.1673-3185.02551

FU W C, LIU Z Q, KONG X S, et al. Study of similarity characteristic for the buckling process of box girders subjected to bending load[J]. Chinese Journal of Ship Research, 2023, 18(3): 173–185. DOI: 10.19693/j.issn.1673-3185.02551

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Study of similarity characteristic for the buckling process of box girders subjected to bending load

FU Weicheng^{1, 2,},
LIU Zhongquan^3,,
KONG Xiangshao^2, ,,
ZHOU Hu^{1, 2},
WU Weiguo²

1.
School of Naval Architecture, Ocean and Energy Power Engineering, Wuhan University of Technology, Wuhan 430063, China
2.
Engineering Research Center on Green & Smart River-sea-going Ship, Wuhan University of Technology, Wuhan 430063, China
3 Center for Innovation-Driven Development, National Development and Reform Commission, Beijing 100045, China

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Received Date: October 07, 2021
Revised Date: March 11, 2022
Available Online: March 13, 2022

This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Abstract

Abstract

Objectives This study aims to explore nonlinear similarity criteria for box girders under pure bending load, improve the prediction accuracy of the model on the response of prototype structures and provide a theoretical basis for establishing a distortional similarity model design method for actual ship structures.
Methods First, based on the stability and nonlinear criteria of axially compressed reinforced slabs, a nonlinear similarity criterion for box girders under pure bending load is established using the theoretical analysis method. Second, the ultimate load-carrying capacity and buckling response of scaled-down prototype box girder models are then analyzed using the numerical calculation method to verify the validity of the similarity criterion.
Results The numerical calculation results show that different scale designs based on the proposed method have high similarities in their flexural failure modes, and the ultimate strength of the scaled-down prototype models can be accurately predicted. Under a specific flexural mode, an increase in the initial deformation reduces the ultimate load-carrying capacity of the box girder. In contrast, the initial deformation factor has less influence on the prediction accuracy of the scaled-down model.
Conclusions This paper provides an effective nonlinear similarity model design method for the ultimate strength testing of hull beams under pure bending load, which has value for the study of the structural safety of ships.
- box girders,
- pure bending load,
- similarity criteria,
- yield stress,
- initial deformation

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Study of similarity characteristic for the buckling process of box girders subjected to bending load

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