1,720,962 research outputs found
Elastoplastic Analysis of 3D Steel Frames with Semi-rigid Joints
Get PDFA beam element for the analysis of elastoplastic large deformation of three-dimensional frames that have steel members with semi-rigid joints is presented. A plastic hinge type formulation was employed combining the modified incremental stiffness method^1,the updated Lagrangian formulation and numerical integration about the end sections of the element. The end sections of the element are discretized into small areas to estimate the plastic deformation of the element. The elastic and plastic deformations of the element are treated separately. The behavior of a semi-rigid joint is modeled as the element-end compliance. Considering the assumptions of the method, a four-element approximation for a member gives excellent results for a 3D analysis of semi-rigid and pin-connected steel frames as well as for rigid frames. The adequacy of the method is verified by comparing the results with experimental ones obtained by the author. Some examples are presented to demonstrate the accuracy and efficiency of the method
Freeware for 3D frame analysis FPHM & FPHM-D
No full textThe Fibered Plastic Hinge Model (FPHM) program is an analysis code for quasi-static three-dimensional (3D) elastoplastic large deflection analysis of frames that contain steel members, reinforced concrete (RC) members, steel reinforced concrete (SRC) members, concrete filled tube (CFT) members, prestressed concrete (PC) members, composite beams, tension braces and steel damper braces (buckling restrained braces). Since its numerical procedure precisely accounts for PΔ-effects, the ultimate lateral strength of a frame can be obtained accurately.The FPHM-dynamic (FPHM-D) program is the analysis code for dynamic 3D elastoplastic large deflection analysis of frames in which the restoring force characteristics of frames are estimated by the FPHM program. From v4.02 onwards, the Appendix 1 concerned with cancellation of unbalanced force vector is added showing the importance of the cancellation.From v4.03 onwards, an elastoplastic incremental analysis of a frame containing brittle tension braces can be performed.From v4.04 onwards, CFT members with reinforcing steels are supported.From v4.05 onwards, specification of how to estimate the internal force vector of a frame is possible (Appendix 2).From v4.06 onwards, input of the multiplying-factor to determine the post-yield strain hardening coefficient of the steel fiber is possible (Appendix 3)
Freeware for 3D frame analysis FPHM & FPHM-D
No full textThe Fibered Plastic Hinge Model (FPHM) program is an analysis code for quasi-static three-dimensional (3D) elastoplastic large deflection analysis of frames that contain steel members, reinforced concrete (RC) members, steel reinforced concrete (SRC) members, concrete filled tube (CFT) members, prestressed concrete (PC) members, composite beams, tension braces, steel damper braces (buckling restrained braces) and truss members. Since its numerical procedure precisely accounts for PΔ-effects, the ultimate lateral strength of a frame can be obtained accurately.The FPHM-dynamic (FPHM-D) program is the analysis code for dynamic 3D elastoplastic large deflection analysis of frames in which the restoring force characteristics of frames are estimated by the FPHM program. From v4.02 onwards, the Appendix 1 concerned with cancellation of unbalanced force vector is added.From v4.03 onwards, an elastoplastic incremental analysis of a frame containing brittle members can be performed.From v4.05 onwards, specification of how to estimate the internal force vector of a frame is possible (Appendix 2).From v5.00 onwards, input of the post-yield non-dimensional strain hardening coefficient of the steel fiber is possible (the form of input data was slightly changed).From v5.10 onwards, output data increase and the relative additional input data are required
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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