1,721,053 research outputs found
Effectiveness of FRP stirrups in concrete beams subject to shear
No full textIt can be shown theoretically that two key parameters that govern the shear strength of FRP reinforced concrete structures are the angle of inclination of the diagonal struts, θ, and the strength of the FRP stirrups, fv. Existing standards for FRP reinforced concrete differ in their provisions for the determination of these quantities and to date there is paucity of experimental evidence to conclusively support the superiority of a particular standard. To address this problem, an extensive experimental program is undertaken at the University of Salerno with focus on determining the above quantities in GFRP reinforced concrete beams. Beams with different amounts of transverse reinforcement and span to depth ratio are tested to investigate the variation of θ and the magnitude of fv, with the purpose of determining their effect on the beams shear strength
Una lettura trigenerazionale degli atteggiamenti emotivi in famiglie problematiche e non: una ricerca multi-metodo sulle relazioni familiari.
No full textBuckling behavior of curved composite beams with different elastic response in tension and compression
No full textA geometrically nonlinear finite element model of a composite curved beam is presented, accounting for moderately large rotations of the cross-sections, moderately large shear strains, small axial strains, and different elastic response of the material in tension and compression (bimodular behavior). A path following procedure in displacement control is employed to compute the stability points and the post-buckling response of the given model. Several comparisons are established with different numerical approaches available in the literature, showing the accuracy of the proposed finite element scheme in the unimodular case. Some original results on the in-plane and out-of-plane buckling of bimodular arches highlight that the post-buckling response of such structures is strongly influenced by the ratios between tensile and compressive moduli. © 2013 Elsevier Ltd
Soddisfazione coniugale e attribuzioni emotive quali indicatori di congruenza nei patterns relazionali di coppia
No full textAtti del Congresso pubblicati nella Repubblica di S. Marin
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
Pre-buckling imperfection sensitivity of pultruded FRP profiles
No full textThis paper presents a geometrically non-linear one-dimensional model suitable for analyzing thin-walled fiber-reinforced polymer profiles, which accounts for the effect of manufacturing imperfections. The kinematic model is developed under the hypotheses of small strains and moderately large rotations of the cross-sections, and is able to take into consideration the contribution of shear strains and the effects related to warping displacements. The aim of the study is to develop a proper tool to analyze the pre-buckling behavior of such beams, since current approaches based on two-dimensional finite element method analysis demand significant computational efforts to be applied to real structures. The numerical results underline the effectiveness of the proposed mechanical model in analyzing case studies of technical interest in Civil Engineering, and the relevant influence of geometrical imperfections on the structural performance of FRP components with regard to serviceability design requirements
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