Search results for "Frames"
showing 10 items of 265 documents
Analysis of local shear effects in brick masonry infilled RC frames
2013
Masonry infills panels placed among framed structures meshes have a relevant influence in presence seismic actions in terms of strength stiffness and global displacement capacity. In the case of RC structures, the modifications of internal forces due to infill-frame interaction may be not compatible with surrounding frame members strength especially considering additional shear forces arising at the ends of beams and columns in contact with the panel under lateral actions. Such effects may be in many cases the cause of unexpected brittle collapse mechanisms which compromise the safety of the entire structure. In this paper by means of a double (micromodeling and macromodeling) procedure reg…
Empirical Equations for the Direct Definition of Stress–Strain Laws for Fiber-Section-Based Macromodeling of Infilled Frames
2018
Equivalent strut macromodels are largely used to model the influence of infill walls in frame structures due to their simplicity and effectiveness from a computational point of view. Despite these advantages, which are fundamental to carrying out seismic simulation of complex structures, equivalent struts are phenomenological models and therefore have to conventionally account for the influence of really large amounts of geometrical and mechanical variables with a relatively simple inelastic response. Mechanical approaches, generally used to evaluate the force-displacement curve of a strut, are based on hypothesizing the damage mechanism that will occur for an infill-frame system subject to…
Definition of a fiber macro-model for nonlinear analysis of infilled frames
2017
A common way to model infill-frame interaction is the use equivalent strut macromodels. In most cases these are compression only resistant truss elements defined with a multi-linear axial-force / axial-displacement law. The main difficulty in using this approach is to correctly calibrate such a force-displacement curve (slope of ascending and post-peak branches, critical yielding, peak and residual forces) because of the large number of variables (mechanical and elastic properties of materials) and the different possible damage mechanisms activated for the frame-infill system. Another possible way is using fiber-section elements as diagonal struts. In this case the force-displacement law is…
Macroelement Model for the Progressive-Collapse Analysis of Infilled Frames
2021
A new multistrut macromodel for the analysis of the progressive-collapse response of infilled reinforced concrete (RC) frames is presented in this paper. The model consists of three struts: two outer infinitely rigid and resistant struts and one inner fiber-section strut. The inclination of the struts as well as the stress-strain response are modulated by two parameters that are obtained by means of analytical correlations provided in the paper. The latter link the geometric and mechanical properties of an infilled frame to the geometric configuration and mechanical response of the equivalent strut model. This confers the model the capability to adapt to consider different collapse configur…
Structure and evolution of the leucine plasmids carried by the endosymbiont (Buchnera aphidicola) from aphids of the family Aphididae.
1998
In all examined species of the family Aphididae, the bacterial endosymbiont Buchnera aphidicola carries a plasmid encoding the genes leuABCD (involved in leucine biosynthesis) along with repA1, repA2 and ORF1. The gene organisation of the leucine plasmids was conserved, except in Buchnera isolated from Pterocomma populeum, where ORF1 was located in a different position. An inverted repeat (LIR1) located between repA2 and leuA is found in all of the Buchnera leucine plasmids examined. The predicted secondary structure of the LIR1 transcript conforms to a long hairpin loop, suggesting an involvement in transcription termination or messenger stability. Phylogenetic reconstruction based on repA…
Frames und konzeptuelle Metaphern: ein kognitiver Ansatz für die Fachsprachenforschung
2017
International audience; Der Vortrag geht der Frage nach potentiellen kognitiven Ansätzen in der Fachsprachenforschung nach: Nach vielen mehr oder weniger tiefgreifenden Turns wird ja diese linguistische Teildisziplin – wie die Linguistik überhaupt – immer mehr mit kognitiven Fragestellungen und Methodologien konfrontiert, die unter einer Bezeichnung wie Specialized Communication Studies (Schubert 2011) subsumiert werden können.Auf Grund eines Korpus finanzpolitischer Berichte der europäischen Zentralbank (=aus dem Englischen übersetzter Skripte der Pressekonferenzen) und der Bundesbank (= Monatsberichte) soll im Anschluss an Sullivan (2013) gezeigt werden, wie so genannte konzeptuelle Metap…
Quelles approches cognitives pour les discours spécialisés ?
2018
Doctoral; Cet atelier doctoral part initialement d’une conférence prononcée au département de français de l’Université Craiova (Roumanie) en 2013 et capitalise sur les projets développés depuis à la MSH de Dijon, ainsi que sur les premiers résultats de thèses en cours, en particulier dans le domaine de la linguistique sensorielle.L’objectif est tout d’abord de situer la recherche sur les discours spécialisés au sein des sciences du langage, mais pas seulement, en partant de la proposition de Condamines / Narcy-Combes (2015) pour qui la linguistique appliquée, dont relève traditionnellement les discours spécialisés, est forcément une science située. On en tire les conséquences méthodologique…
Hybrid sequencing approach applied to human fecal metagenomic clone libraries revealed clones with potential biotechnological applications.
2012
Natural environments represent an incredible source of microbial genetic diversity. Discovery of novel biomolecules involves biotechnological methods that often require the design and implementation of biochemical assays to screen clone libraries. However, when an assay is applied to thousands of clones, one may eventually end up with very few positive clones which, in most of the cases, have to be "domesticated" for downstream characterization and application, and this makes screening both laborious and expensive. The negative clones, which are not considered by the selected assay, may also have biotechnological potential; however, unfortunately they would remain unexplored. Knowledge of t…
Phrase Frames as an Exploratory Tool for Studying English-to-Polish Translation Patterns: A Descriptive Corpus-Based Study
2020
Designed as a proof-of-concept, this descriptive corpus-based study focuses on the concept of phrase frame, defined as a contiguous sequence of n words identical except for one (Fletcher 2002). Although phrase frames were already used as a means of exploring pattern variability across and within different text types or registers written in English, they have been rarely, if ever, employed so far as a unit of analysis in descriptive research on translation. In this study, we use the English‒Polish parallel corpus Paralela (Pęzik 2016) to identify and describe Polish translation patterns that emerge from two functionally-defined English phrase frames (it is * clear that, it is * difficult to ). …
Language for International Communication: Linking Interdisciplinary Perspectives (2nd international symposium)
2014
This collection contains papers delivered at the 2nd international symposium "Language for International Communication: Linking Interdisciplinary Perspectives" held at the University of Latvia, Latvia, on 23-24 May 2013.