Journal ArticleDOI
Interaction curves for stiffened panel with circular opening under axial and lateral loads
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In this article, a numerical study carried out on the ultimate strength of stiffened panels with central circular opening subjected to axial load, lateral load and a combination of axial and lateral loads is presented.Abstract:
Stiffened panels in ships and offshore oil platforms are provided with circular openings for repair, access and maintenance. This paper presents the numerical study carried out on the ultimate strength of stiffened panel with central circular opening subjected to axial load, lateral load and a combination of axial and lateral loads. Ultimate strength of the panel was evaluated considering both geometric and material non-linearities using FEA software ANSYS. Plates of varied widths and open section unequal angle stiffeners covering plate and column slenderness ratios in the practical range of 1.0–4.5 and 0.32–1.00, respectively, keeping the opening ratio equal to 1.0 are the parameters considered in this study. On the basis of the study, interaction curves were developed for normalised axial load and normalised lateral load. The developed interaction curves for stiffened panels with angle stiffeners and circular opening were found to be non-linear for lower plate slenderness ratio up to 2.0 and for the ran...read more
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Journal ArticleDOI
Influence of corrosion on the ultimate compressive strength of steel plates and stiffened panels
TL;DR: In this article, a comparison between steel plate and stiffened panels subject to localised corrosion was performed, showing the structural element selection can strongly influence the accuracy of the estimated corrosion damage effect.
BookDOI
Progress in Maritime Technology and Engineering : Proceedings of the 4th International Conference on Maritime Technology and Engineering (MARTECH 2018), May 7-9, 2018, Lisbon, Portugal
Abstract: The State of Bahia has one of the largest port complexes in Brazil, that consists of public ports and private use terminals. One of which is specialized with a cargo carrying capacity of about 530 thousand TEUs (Twenty-foot Equivalent Unit) per year. On the other hand, the container terminal at the port of Genoa, Italy, has a similar capacity but has been performing better than the Brazilian one. The present study evaluates the differences and similarities between these ports, in the context of engineering, environmental sustainability and some topics of the port regulatory framework that can influence productivity. Based on the arrival and service rates of the ships and their respective probability distributions, a mathematical model of queuing theory was developed that indicates the port occupation rate, the time and the average number of ships in the queue, in a process with which one can assess the environmental impact of these terminals. (naval-port infrastructure and queuing theory) and in environmental sustainability, as well as in some points of the regulatory framework and logistical infrastructure of both countries that can influence and reveal the competitiveness of these ports. Based on vessel arrival and service rates and their consequent probability distributions, in addition to other constraints, the queuing model reveals the time and average number of ships in process, the port occupation rate, and the expected probability of this finding variable, may provide a possibility of fine payments for delay in services, thus serving as the efficiency indicators of port operation. The results obtained here, and their interpretations, are limited to the time of their respective data collection, as well as to the reliability of information that was possible to obtain at the time of the technical visits and professional meetings held. They are also limited to the consultations made to the electronic pages of the terminals and institutions that control local port operations. The present work is in the context of other researches already carried out. Camelo et al. (2010), used queuing theory to simulate the behavior of the row of iron ore vessels in the port of Ponta da Madeira, Brazil, with the aid of the Arena® software and found high berth occupation rates, recommending investments in the expansion of its capacity to meet the expectations of growing demand for ores in the world market. In this same direction, Schoreder (2014) simulated the operational behavior of the container terminal at the port of Durban, South Africa, based on the operation of the queue system of the container terminal at the port of Rotterdam from the logic of model construction simulated
Journal ArticleDOI
Ultimate strength of locally damaged panels
TL;DR: In this article, the behaviour and ultimate strength of locally damaged plate panels are investigated in the form of a local imperfection and represents a dent that could be caused by a fall or strike of an object.
Journal ArticleDOI
An analytical solution of distortional buckling resistance of cold-formed steel channel-section beams with web openings
TL;DR: In this article, the authors presented an analytical study on the distortional buckling of cold-formed steel channel-section beams with circular holes in the web and derived a simple formulation for approximating the elastic critical stress and moment of distortion.
Journal ArticleDOI
Ultimate strength assessment of continuous stiffened panels under combined longitudinal compressive load and lateral pressure
TL;DR: In this paper, Fourier components including symmetric and asymmetric shapes are used to estimate the half-wave number of collapse for local plate by using nonlinear finite element analysis.
References
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Journal ArticleDOI
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TL;DR: In this article, a postbuckling behaviour and the ultimate load capacity of perforated plates with different boundary conditions and subjected to uniaxial or biaaxial compression were investigated.
Journal ArticleDOI
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Journal ArticleDOI
Elasto-plastic buckling of perforated plates under uniaxial compression
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Journal ArticleDOI
Buckling and Post-buckling Behaviour of Plates with Holes
D Ritchie,J Rhodes +1 more
TL;DR: In this paper, the behavior of simply-supported uniformly compressed square and rectangular plates with central circular holes was investigated using an approximate approach using a combination of Rayleigh-Ritz and finite element methods.