1,720,965 research outputs found
Development of Software and Hardware Architecture for Real-Time Dynamic Hybrid Testing and Application to a Base Isolated Structure
No full textReal-Time Dynamic Hybrid Test (RTDHT) is a promising experimental testing technique, which combines
numerical simulation and experimental testing of physical specimen in a complementary and
efficient way. However, taking advantage of both numerical and experimental capabilities requires
facing issues related to both environments.
In this article, the design and implementation of a RTDHT hardware and software architecture
is presented. Issues related both to the numerical model and to the experimental setup are
discussed; this is done from a general perspective, as well as referring to a base isolated structure
which represents the implemented case study
Seismic assessment and qualification of non-structural elements in Europe: a critical review
No full textNon-structural elements are not part of the building’s structural load-bearing system but are
nonetheless subjected to the same dynamic environment during an earthquake. Even if the structural
systems are designed to permit immediate occupancy after a seismic event, the failure of non-structural
elements such as partitions, ceiling systems, and piping systems could significantly affect the performance
and the functionality of buildings after an earthquake. In many seismic events that have struck densely built
regions in the twentieth century, non-structural losses have exceeded structural losses in most affected
buildings. In Europe, only limited seismic design prescriptions are included in building codes for the seismic
design and qualification of non-structural elements. Seismic qualification testing to verify non-structural
elements capacities includes both shake table testing as well as displacement- or force-controlled quasi-static
testing. In this paper, a critical review of the methodologies available in the literature to evaluate the seismic
performance of non-structural elements is presented. The testing procedures could be used both to verify
that specific performance objectives for a given intensity are satisfied as well as to develop fragility functions
useful in the loss estimation framework. The experimental procedures available worldwide are compared
here, focusing on their applicability to the European context. Focus is on the likeliest approach to be used
in Europe for the seismic qualification of non-structural elements by shake table testing. The proposed
testing protocol was appraised trough shake table tests on a specimen meant to be representative of an
acceleration-sensitive non-structural element
Seismic design of traditional industrial steel and RC precast structures: a comparative analysis
No full textProduzione di scenari sismici di danno a livello comunale: applicazione al progetto SIMULATOR (Sistema Integrato ModULAre per la gesTione e prevenziOne dei Rischi)
No full textNei minuti immediatamente successivi ad un evento catastrofico le difficoltà che il Sindaco può incontrare nella gestione
dell’emergenza sono molteplici. “Il sindaco è autorità comunale di protezione civile. Al verificarsi dell’emergenza nell’ambito
del territorio comunale, il sindaco assume la direzione dei servizi di emergenza che insistono sul territorio del comune, nonché
il coordinamento dei servizi di soccorso e di assistenza alle popolazioni colpite e provvede agli interventi necessari dandone
immediata comunicazione al prefetto e al presidente della giunta regionale” Comma 3 dell’Art. 15 della Legge n. 225 del 24
febbraio 1992: istituzione del Servizio Nazionale della Protezione Civile. È fondamentale reperire il maggior numero di informazioni
disponibili e conoscere esattamente quali sono i passaggi da compiere per raggiungere il miglior risultato possibile
nel minor tempo necessario e in ottemperanza alle normative vigenti. Grazie ai fondi POR 2007-2013 di Regione Lombardia,
un gruppo costituito da 11 partner tra Enti di Ricerca, Piccole Medie Imprese (PMI) e una Grande Impresa ha sviluppato il
progetto SIMULATOR (Sistema Integrato ModULAre per la gesTione e prevenziOne dei Rischi) che prevede come principale
prodotto il prototipo di una piattaforma che può supportare le PA (Pubbliche Amministrazioni) nelle fasi di previsione, prevenzione,
gestione e soccorso di alcuni rischi: sismico, idrogeologico e chimico-industriale. Nel presente articolo verrà illustrato
il lavoro svolto da Eucentre per SIMULATOR nell’ambito della produzione di scenari di danno sismici con la collaborazione
della Sezione di Milano dell’INGV relativamente all’elaborazione di mappe di scuotimento. Verrà anche descritto il sistema di
monitoraggio sismico progettato ed installato in una Scuola Primaria nel comune di Bagnolo Mella
In situ pushover test of an existing two storey RC frame designed for gravity loads
No full textThe present study has been carried out within the framework of the research project PRISMA
(PiattafoRme cloud Interoperabili per SMArt-government), with the purpose of studying the response of
existing constructions designed for gravity loads only in the Sicily Region (Italy). A two storey reinforced
concrete building, located nearby Messina city has been chosen as a case study. The building was built in
the 80s, up to the completion of the bearing structure, floors and infill panels.
In order to design the test, numerical study on the structure have been conducted, using different
softwares and a number of numerical models of the structure, in order to account for the uncertainties
related to the mechanical characteristics of the materials and of the structural response, and to consider
the interaction with the reaction structure.
The pseudo-static pushover test has been designed to push and pull the building in one direction. The
testing system was made up of 3 actuators reacting on 3 RC walls built on purpose inside the structure and
connected to the frame foundations, suitably reinforced to resist the additional stress generated by the
test. The test was conducted under displacement control, imposing 8 increasing levels of displacement
from 3 mm to 62 mm, for a maximum drift of about 2%. At the end of the test, the infill panels were
completely collapsed. Beams, columns and joints showed plastic hinges and shear failures in different
parts of the structure, with spread concrete spalling
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
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