1,720,954 research outputs found
“Seismic design of multi-storey CLT buildings according to Eurocode 8.”
No full textLe strutture in Cross Laminated Timber (CLT) – o Legno Lamellare Incrociato – sono sempre più utilizzate in tutto il mondo e principalmente in Europa, dove il sistema ha avuto origine. Tuttavia, nonostante questa diffusione abbia portato alla realizzazione di un gran numero di edifici multipiano in tutta Europa, mancano ancora all’interno degli Eurocodici indicazioni e regole di progettazione per questa tipologia di edifici, soprattutto per quanto concerne la progettazione antisismica. Cionondimeno l’Eurocodice 8 richiede in molti casi, a causa del non soddisfacimento dei criteri di regolarità per la maggior parte degli edifici, l’uso dell’analisi modale con spettro di risposta, ossia l’analisi dinamica lineare. Questo metodo richiede la stima corretta della rigidezza laterale
dell’edificio al fine di calcolare esattamente le forze sismiche di progetto, che possono essere significativamente sottovalutate o sovrastimate in funzione delle dimensioni dell’edificio e della forma dello spettro di progetto. A questo scopo è necessario modellare ogni singola connessione basandosi su risultati sperimentali disponibili, che non sono però facilmente accessibili per un progettista. In questo articolo viene proposto un metodo di progettazione per la modellazione dinamica lineare di strutture in CLT utilizzando SAP 2000. Le formule proposte sono basate sui riferimenti normativi e bibliografici disponibili, e vengono utilizzate per la progettazione di un caso studio di un edificio di 3 piani. Vengono inoltre presentate ulteriori indicazioni per la progettazione sismica di edifici in CLT che non sono attualmente incluse nell’Eurocodice 8. Infine, il modello di progettazione proposto è anche confrontato con i risultati di prove sismiche su tavola vibrante condotte su un edificio in CLT di tre piani nel 2006 in Giappone dal CNR-IVALSA.Cross Laminated Timber (CLT) structures are nowadays increasingly used worldwide and mostly in Europe where the system originated. However, in spite of this diffusion which led to the construction of a great number of multi-storey buildings all over Europe, still Eurocodes are almost completely missing provisions for CLT designers, especially regarding the seismic design. Nevertheless, Eurocode 8 requires in most cases, due to the regularity criteria being not fulfilled for most of the buildings, the use of the modal response spectrum analysis method, i.e. the linear dynamic analysis. This method requires the correct estimation of the lateral stiffness of the building in order to accurately calculate the design seismic forces in the building, which may be significantly underestimated or overestimated depending on the size of the building and the shape of the design spectrum. This can be done by modelling each connection with different methods that are often based on available test results, which are not easily accessible by a practicing engineer. This paper provides a design approach for dynamic linear modelling of CLT structures using SAP 2000. Equations are proposed based on available design codes and literature references, and used to design a 3-storey case study building. Further provisions for the seismic design of CLT buildings which are not included in Eurocode 8 are also given. Finally, the proposed design model is also compared with the results of the shaking table tests conducted in 2006 in Japan by CNR-IVALSA on a three-storey CLT building
“Seismic design of multi-storey CLT buildings according to Eurocode 8.”
No full textLe strutture in Cross Laminated Timber (CLT) – o Legno Lamellare Incrociato – sono sempre più utilizzate in tutto il mondo e principalmente in Europa, dove il sistema ha avuto origine. Tuttavia, nonostante questa diffusione abbia portato alla realizzazione di un gran numero di edifici multipiano in tutta Europa, mancano ancora all’interno degli Eurocodici indicazioni e regole di progettazione per questa tipologia di edifici, soprattutto per quanto concerne la progettazione antisismica. Cionondimeno l’Eurocodice 8 richiede in molti casi, a causa del non soddisfacimento dei criteri di regolarità per la maggior parte degli edifici, l’uso dell’analisi modale con
spettro di risposta, ossia l’analisi dinamica lineare. Questo metodo richiede la stima corretta della rigidezza laterale
dell’edificio al fine di calcolare esattamente le forze sismiche di progetto, che possono essere significativamente
sottovalutate o sovrastimate in funzione delle dimensioni dell’edificio e della forma dello spettro di progetto. A questo scopo è necessario modellare ogni singola connessione basandosi su risultati sperimentali disponibili, che non
sono però facilmente accessibili per un progettista. In questo articolo viene proposto un metodo di progettazione per la modellazione dinamica lineare di strutture in CLT utilizzando SAP 2000. Le formule proposte sono basate
sui riferimenti normativi e bibliografici disponibili, e vengono utilizzate per la progettazione di un caso studio di un edificio di 3 piani. Vengono inoltre presentate ulteriori indicazioni per la progettazione sismica di edifici in CLT che non sono attualmente incluse nell’Eurocodice 8. Infine, il modello di progettazione proposto è anche confrontato
con i risultati di prove sismiche su tavola vibrante condotte su un edificio in CLT di tre piani nel 2006 in Giappone dal CNR-IVALSA.Cross Laminated Timber (CLT) structures are nowadays increasingly used worldwide and mostly in Europe where the system originated. However, in spite of this diffusion which led to the construction of a great
number of multi-storey buildings all over Europe, still Eurocodes are almost completely missing provisions for CLT designers, especially regarding the seismic design. Nevertheless, Eurocode 8 requires in most cases, due to the regularity criteria being not fulfilled for most of the buildings, the use of the modal response spectrum analysis method, i.e. the linear dynamic analysis. This method requires the correct estimation of the lateral stiffness of the building
in order to accurately calculate the design seismic forces in the building, which may be significantly underestimated or overestimated depending on the size of the building and the shape of the design spectrum. This can be done by
modelling each connection with different methods that are often based on available test results, which are not easily accessible by a practicing engineer. This paper provides a design approach for dynamic linear modelling of CLT structures using SAP 2000. Equations are proposed based on available design codes and literature references, and used to design a 3-storey case study building. Further provisions for the seismic design of CLT buildings which are not included in Eurocode 8 are also given. Finally, the proposed design model is also compared with the results of
the shaking table tests conducted in 2006 in Japan by CNR-IVALSA on a three-storey CLT building
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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