1,721,275 research outputs found
A theoretical model for predicting strength of ring-stiffened tubular T-joints in offshore structures
No full textA theoretical model for predicting the strength of ring-stiffened tubular T-joints in offshore structures M. M. K. Lee, BSc, PhD, CEng, MICE, MIStructE, and A. Llewelyn-Parry, BEng Although not commonly used in modern design, ring stiffeners were extensively used to enhance the strength of tubular joints in older offshore steel jacket structures. No detailed guidance on the determination of the strength of ring-stiffened joints can be found in any major offshore code. There is therefore a need for research for the purposes of structural assessment when platforms are upgraded or modified...<br/
Strength estimation of offshore ring-stiffened DT-joints
No full textThis volume contains the Kurobane lecture and proceedings of the Tenth International Symposium on Tubular Structures - ISTS10, held in Madrid, Spain, 18-20 September 2003. The ISTS10 provides a platform for the presentation and discussion of seventy-three lectures covering themes including: bridges; roofs; design aspects and case studies; static joint behaviour; fatigue; members; beam-column connections; finite element methods; concrete filled tubes; trusses and frames; cast nodes; and behaviour of tubular structures under fire. This book provides a useful reference work for architects, civil and mechanical engineers, designers, manufacturers and contractors involved with tubular structures
Strength prediction of ring-stiffened DT-joints in offshore jacket structures
No full textInternal stiffeners are commonly employed to enhance the strength of tubular joints found in off-shore steel jacket structures. However, there is a lack of detailed design guidance on the determination of their strengths in major offshore codes or design guides. This paper first summarises the results of a finite element study on tubular DT-joints with internal ring stiffeners subjected to axial brace compression. The study generated a database of twenty-two stiffened joints, some of which included multiple stiffeners. Observations on the development of plastic zones in the stiffeners show that the failure mechanism is the formation of plastic hinges from bending. A theoretical model based on the observed failure mechanism in the stiffener is then presented. The model is based on the upper bound theorem, with a postulated six-hinge collapse mechanism. The proposed theoretical model was found to provide strength predictions to a very high degree of accuracy
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Consensus obtained in a Delphi study of shoe wear pattern experiences amongst podiatrists
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