1,721,246 research outputs found
Infills with sliding joints to limit the post-earthquake damage: role and design of openings
No full textMasonry infill walls are typically considered non-structural elements in building design.
Nonetheless, their interaction with the structure during earthquakes is well documented in literature and
their significant effect on the building seismic performance highlighted. A critical aspect is the damage
suffered by traditional infills that can jeopardize the safety of inhabitants and lead to significant building
downtime. Recently, different innovative construction techniques have been proposed, aimed at obtaining
deformable infills characterized by low stiffness, low damageability and large deformation capacity, in order
to limit the infill-frame interaction and the post-earthquake damage. The paper discusses the role of a fullheight
opening in the seismic response of infills made deformable by adopting sliding joints. A summary of
the test results obtained by the authors on a real scale infill with horizontal sliding joints and a full height
opening is presented, together with a parametric study on the in-plane response of an infill with opening in
a “one story-one bay” RC frame. Focus is made on the interaction of the infill with the surrounding frame
and on the maximum actions in a critical component of the infill, namely the post located at the window’s
side to control the infill’s sliding mechanism. The parametric study, based on a numerical micro-modeling
approach, offers some preliminary guidelines for the design of the infilled frame, based on the opening
position, infill length and sliding joint configuration. The results show the positive effect of the posts’
deformability in limiting the shear action on both the frame’s columns and the post itself, including its
connection to the frame
Openings in infills with horizontal sliding joints: a parametric study to support the design
No full textLa Mélissa Borghèse de Dosso Dossi. Une célèbration des mérites politiques de Lucrèce Borgia?
No full textuna nuova lettura del celebre dipinto di Dosso nella Galleria Borghese, alla luce di alcuni passi dell'"Orlando Furioso
La gestione delle operation nelle PMI
No full textL’obiettivo del capitolo è quello di illustrare prassi e metodologie che possono essere applicate alla gestione della produzione delle imprese di minori dimensioni. La trattazione prende spunto dalla presentazione di un caso reale che evidenzia una serie di situazioni problematiche che caratterizzano le realtà manifatturiere di piccola e media dimensione. In particolare, vengono affrontati i temi della misurazione delle performance nell'area produttivo-logistica, la definzione delle strategie produttive, la riduzione dei lead time e il supporto dei sistemi informativi alla gestione della produzione
Migliorare la gestione del tempo attraverso la delega
No full textQuesto testo nasce con il chiaro obiettivo di offrire al lettore indicazioni a 360° sulle problematiche di "management" delle piccole e medie imprese. Si tratta di una guida dal taglio pragmatico in cui si trovano spiegate e risolte le principali problematiche gestionali che interessano e spesso affliggono un imprenditore: da quelle fondamentali ove è maggiore la specificità rispetto alle piccole dimensioni (strategia e organizzazione), a quelle inerenti ai rapporti con tutto ciò che è esterno all'impresa (marketing, finanza e credito, reti di fornitura), per arrivare a quelle interne più "tecniche" (produzione, vendite, controllo di gestione e sistemi informativi). Folti apparati di tabelle, schemi grafici, box contenenti i casi aziendali, riepiloghi alla fine dei capitoli, suggerimenti bibliografici per ulteriori approfondimenti sul tema aiutano e incentivano la lettura, rendendo il testo fruibile al target di riferimento
Infill with sliding panels in presence of a full-height opening: Experimental in-plane response
No full text
INFILL WITH SLIDING PANELS AND A FULL-HEIGHT OPENING
No full textThe innovative infill construction technique for seismic resistance, implementing horizontal
sliding joints to partition the wall into subpanels, it is here tested in presence of a full height
opening. With the double aim of protecting the opening fixtures (window or door) from the infill
sub-panels’ relative sliding and offer out of plane support to the infill, a post is placed at the
opening side spanning between the top and bottom beam of the frame. The post stiffness and
strength design is the object of the study. The role of the post deformability was studied by
modifying the post’s stiffness with additional steel profiles coupled to the initial wooden post
configuration, in different test phases. The shear action at the post ends was measured with
specific load cells, to provide information for the proportioning of the post and its connection
to the beams. The results showed the efficiency of the post in governing the sliding mechanism
between the infill sub-portions and the role of the post’s stiffness in modifying the in-plane
response of the infill. Thanks to the post’s deformability, the overall infill-frame interaction was
reduced with respect to previously tested similar infills without openings
Existing RC bare frames reinforced with smooth rebars: Influence of the modelling approach
No full textSeveral existing RC frame buildings were designed only for gravity loads and built with smooth rebars. Experimental results showed that the seismic behaviour of this kind of structures is different with respect to those built with deformed rebars; consequently, the classical modelling approaches are sometimes inadequate. The poor bond performance of smooth rebars provides high deformability to frame members that turns out to be an important resource for the seismic retrofit. In fact, the larger deformation capacity of the existing structure allows for more slender and flexible retrofit systems. A modelling approach to account for the smooth rebar slip contribution to the RC frame members overall deformability is presented and its results are compared to those of experimental tests available in the literature. Finally, an application to a bidimensional RC frame and its strengthening is discussed
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