An empirical formulation for predicting the ultimate strength of stiffened panels subjected to longitudinal compression

Kim, D.K.; Lim, Hui Ling; Kim, M.S.; Hwang, Oe-Ju; Park, K.S.

doi:10.1016/j.oceaneng.2017.05.031

Cited by 70 publications

(36 citation statements)

References 16 publications

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“…The longitudinal girders and transverse frames are modelled with boundary conditions constraining the out-of-plane movement. The present model extent and applied boundary conditions are consistent with the ISSC (2012) and Kim et al (2017), which allow for the end-rotation of stiffeners and the interactions between the adjacent structures in the longitudinal direction and may be a reasonable representation of typical ship structures. The effect of different boundary conditions on the collapse behaviour of stiffened panel could refer to Xu et al (2013).…”

Section: Finite Element Modellingmentioning

confidence: 65%

“…In this study, we adopted the same stiffened panel scenarios from ISSC (2012). The probability density distributions for the local elements, i.e., stiffened panel and unstiffened panel, may be referred to Kim et al (2017Kim et al ( , 2018b, respectively. An elastic-perfectly plastic material behaviour is assumed.…”

Section: Numerical Investigation Using Nlfemmentioning

confidence: 99%

“…Empirical formulations were also developed in the form of design charts (Chalmers 1993) where the ultimate compressive strength of stiffened panels was given as a function of plate slenderness, column slenderness and cross section area ratio. Recently, empirical formulae were introduced by Zhang and Khan (2009) and Kim et al (2017) based on finite element results. Empirical formulations are usually developed as a simple expression.…”

Section: Introductionmentioning

confidence: 99%

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An adaptable algorithm to predict the load-shortening curves of stiffened panels in compression

Shen

Kim

Benson

2021

Ships and Offshore Structures

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An adaptable algorithm is proposed in this study, which can predict the complete load-shortening curve of a stiffened panel subjected to uniaxial longitudinal compression. The algorithm provides an extension to existing empirical formulae initially derived for predicting the ultimate compressive strength of stiffened panels. Based on observations from a series of nonlinear finite element analyses, the compressive load-shortening behaviour of stiffened panels is idealised with a linear pre-collapse response, an arc-shaped nonlinear ultimate collapse region and an asymptotic post-collapse decay. The algorithm allows direct modification of the elastic stiffness, ultimate strain, ultimate strength and post-collapse characteristics of the load shortening curve. This enables the load shortening curve to incorporate characteristics specific to the type of stiffened panel under analysis. The capability of the algorithm is demonstrated through an application with the simplified progressive collapse method to calculate the ultimate ship hull strength of four merchant ships and one naval vessel.

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Section: Finite Element Modellingmentioning

confidence: 65%

Section: Numerical Investigation Using Nlfemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An adaptable algorithm to predict the load-shortening curves of stiffened panels in compression

Shen

Kim

Benson

2021

Ships and Offshore Structures

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“…Finally, the accuracy of the refined empirical formulation for flat-bar stiffened panel obtained in this study was verified by statistical analysis. The applicability of the outcome obtained from this study was verified by ANSYS FE numerical simulations, as well as existing empirical formulations for flat-bar stiffened panel, by adopting single line shape formulations [21,25,26,28,29].…”

Section: Introductionmentioning

confidence: 66%

Ultimate Compressive Strength of Stiffened Panel: An Empirical Formulation for Flat-Bar Type

Kim

Lim

et al. 2020

JMSE

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This research aims to study the ultimate limit state (ULS) behaviour of stiffened panel under longitudinal compression by a non-linear finite element method (NLFEM). There are different types of stiffeners mainly being used in shipbuilding, i.e., T-bar, flat-bar, and angle-bar. However, this research focuses on the ultimate compressive strength behaviour of flat-bar stiffened panel. A total of 420 reliable scenarios of flat-bar stiffened panel were selected for numerical simulation by the ANSYS NLFEM. The ultimate strength behaviours obtained were used as data for the development of closed form shape empirical formulation. Recently, our group proposed an advanced empirical formulation for T-bar stiffened panel, and the applicability of the proposed formulation to flat-bar stiffened panel is confirmed by this study. The accuracy of the empirical formulation obtained for flat-bar stiffened panel was validated by finite element (FE) simulation results of statistical analysis (R2 = 0.9435). The outcome obtained will be useful for ship structural designers in predicting the ultimate strength performance of flat-bar type stiffened panel under longitudinal compression.

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“…In the similar manner, collision (Youssef et al 2016;Faisal et al 2017) has also been studied. Various studies have also been conduced to propose empirical formulations in terms of blast wall due to explosion (Kim et al 2018c;Sohn and Kim 2019), ultimate strength of Figure 12 Resistance distribution decay by time (Melchers 1999) plate (Paik et al 2004;Kim et al 2018d), stiffened panel (Kim et al 2017a(Kim et al , 2019a(Kim et al , 2020d and hull girder (Paik et al 2013;Baek et al 2018Baek et al , 2019, fatigue life prediction of offshore riser (Kim et al 2018a), current profile simplification (Kim et al 2019b) and many others. Many of them utilised data analysis tool such as regression analysis.…”

Section: Simplified Approachesmentioning

confidence: 99%

Condition Assessment Techniques for Aged Fixed-Type Offshore Platforms Considering Decommissioning: a Historical Review

Wahab

Kurian

Liew

et al. 2020

J. Marine. Sci. Appl.

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In this study, the technical papers on structural condition assessment of aged fixed-type offshore platforms reported over the past few decades are presented. Other ancillary related works are also discussed. Large numbers of researches are available in the area of requalification for life extension of offshore jacket platforms. Many of these studies involve reassessment of existing platforms by means of conducting pushover analysis, a static nonlinear collapse analysis method to evaluate the structure nonlinear behaviour and capacity beyond the elastic limit. From here, the failure mechanism and inherent reserve strength/capacity of the overall truss structure are determined. This method of doing reassessment is described clearly in the industry-adopted codes and standards such the API, ISO, PTS and NORSOK codes. This may help understand the structural behaviour of aged fixed offshore jacket structures for maintenance or decommissioning.

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An empirical formulation for predicting the ultimate strength of stiffened panels subjected to longitudinal compression

Cited by 70 publications

References 16 publications

An adaptable algorithm to predict the load-shortening curves of stiffened panels in compression

An adaptable algorithm to predict the load-shortening curves of stiffened panels in compression

Ultimate Compressive Strength of Stiffened Panel: An Empirical Formulation for Flat-Bar Type

Condition Assessment Techniques for Aged Fixed-Type Offshore Platforms Considering Decommissioning: a Historical Review

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