1,721,026 research outputs found
Nonlinear seismic analysis of gravity designed RC structures
No full textThis paper illustrates numerical simulations and comparisons with experimental results of existing RC beam-column sub-assemblages reinforced with smooth bars. The specimens reproduce parts of concrete structures designed only for vertical loads without any reinforcing detail rule (such as inadequate bars lap splice, absence of hoops within the joint panel) built in Italy during ‘50s-‘70s. In particular, in this paper is paid attention to the nonlinear models developed for predicting the failure mechanism experimentally observed, taking also into account the bond-slip phenomenon among the longitudinal bars and surrounding concrete. The proposed models are not time-consuming and may be easily implemented in any general-purpose finite element program for numerical simulations of concrete structures. These models represent an useful tool for seismic assessment with a good accuracy of non-ductile RC existing structures
Modellazione non lineare di strutture esistenti in c.a.: confronti con risultati sperimentali.
No full textEdifici di conglomerato cementizio armato dotati di sistemi di protezione sismica passiva basata sulle proprietà delle leghe metalliche con memoria di forma (SMA), Rapporto progetto Manside, Servizio Sismico Nazionale
No full text
Edifici di conglomerato cementizio armato dotati di sistemi di protezione sismica passiva basata sulle proprietà delle leghe metalliche con memoria di forma (SMA), Rapporto progetto Manside, Servizio Sismico Nazionale
No full text
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
Valutazione analitica degli effetti del confinamento sulla capacità di pilastri e travi in c.a. di strutture esistenti e di nuova progettazione
No full textAnalisi della risposta di una struttura in c.a. esistente, da sottoporre a prove sismiche di laboratorio, utilizzando differenti tecniche di adeguamento sismico
No full textStarting from experimental results on RC beam-column connections, the problems linked to the assessment of the seismic response of RC existing structures are treated. In this paper the elementary response mechanisms are shown, and modeling criteria are described for each mechanism, stressing on the peculiar characteristics of the existing buildings in Italy and in the Mediterranean area. The theoretical and experimental studies are in the framework of the main seismic codes and analysis methods, once some uncertainties to be investigated are set.
The experimental campaign will end with pseudodynamic tests on a 2:3 scale 2 floor model structure, designed in absence of seismic code. Different retrofit techniques will also be tested on the same model
- …
