Search results for "Macromodel"
showing 5 items of 5 documents
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 In-Plane and Out-of-Plane Responses of Masonry Infills in Frame Structures
2018
A new macroelement model is presented in this paper for the simulation of the in-plane (IP) and out-of-plane (OOP) response of infilled frames subjected to seismic actions. The model consists of two diagonal, one horizontal, and one vertical struts. Each strut is represented by two fiber-section beam-column elements. The model is able to capture the arching action of the wall under an OOP load as well as the interaction between the IP and OOP actions. The proposed modeling approach is sufficiently simple and efficient that it can be used for the static or dynamic analysis of an entire structural system. An experimental validation has been carried out. A further numerical study performed wit…
Masonry infills and RC frames interaction: Literature overview and state of the art of macromodeling approach
2015
The issue of the influence of masonry infills within RC frames structures has been widely investigated in the last decades by several researchers. The large interest addressed to this topic depends on the actual observation that when in presence of seismic events, the response of framed structures is strongly conditioned by the interaction with the infill walls, which however are considered as non-structural elements and not included in the models. The influence of masonry infills role in structural response is so much relevant to affect not only the overall strength and the stiffness but it may also radically change the possible collapse mechanisms of the overall structural complex under t…
Macromodellamento di convertitori elettronici per impiego in ambito automotive
2009
Un macromodello per telai tamponati sotto carichi laterali ciclici
2009
Il comportamento delle maglie di telaio tamponate è influenzato da numerosi fattori, che rendono problematica la previsione della risposta sotto carichi laterali variabili, a partire dalla difficoltà di selezionare le informazioni fornite dalla sperimentazione per definire parametri utili a un modello di calcolo. I modelli basati sulla definizione di puntoni diagonali equivalenti al tamponamento semplificano il problema purché ci si accontenti di prevedere la risposta del sistema in termini globali, avendo sotto osservazione quali grandezze significative la rigidezza laterale, la resistenza e la duttilità (cap. 3). Tuttavia, tutte le esperienze sperimentali, comprese quelle descritte nel pr…