A long series of cyclic and pseudodynamic tests has been performed on a full scale prototype of precast structure at the European Laboratory of Structural Assessment-ELSA of the Joint Research Centre – JRC of Ispra within the scope of the European Research Project for SME Associations “SAFECLADDING” (Grant Agreement n. 314122 of 2012), with the aim of investigating and setting up the design of innovative connection devices of cladding panels. The recent earthquakes showed the inadequacy of the present design criteria of these connections. Three possible solutions of the problem have been proposed, consisting of isostatic, integrated or dissipative systems. For each solution the effectiveness of the connection devices under earthquake conditions has been tested, both for vertical and horizontal panels, at different levels of seismic intensity and with different arrangement of the fastening system. The paper presents, in addition to the experimental results, all the technological difficulties that had to be overcome to reach a satisfactory behaviour of the different connection systems, showing how the experimental assessment also on full scale prototypes is necessary to find out the solution of unexplored problems.
Una lunga serie di prove cicliche e pseudodinamiche è stata svolta su di un prototipo al vero di struttura prefabbricata presso il Laboratorio europeo di prove strutturali – ELSA del Joint Research Centre – JRC di Ispra nell’ambito del progetto europeo di ricerca “SAFECLADDING” (Grant Agreement n. 314122 of 2012), al fine di studiare e mettere a punto il progetto di dispositivi innovativi di connessione dei pannelli di tamponamento. I recenti terremoti hanno evidenziato l’inadeguatezza degli attuali criteri di progettazione di dette connessioni. Tre possibili soluzioni del problema sono state proposte, basate su sistemi isostatici, integrati o dissipativi. Per ogni soluzione si è sperimentata l’efficacia dei dispositivi di connessione con azioni sismiche, sia per pannelli verticali che orizzontali, ai diversi livelli di intensità sismica e con diversi assetti dei sistemi di attacco. La presente memoria, oltre a fornire i risultati della sperimentazione, descrive tutte le difficoltà tecnologiche che si sono dovute superare per raggiungere un comportamento soddisfacente dei diversi sistemi di connessione, mostrando come la verifica sperimentale anche su prototipi al vero sia necessaria per trovare la soluzione di problemi inesplorati.
Cyclic and Pseudodynamic Tests on a Full Scale Prototype of a Precast Structure with Cladding Panels / Prove Cicliche e Pseudodinamiche su di un Prototipo al Vero di Struttura Prefabbricata con Pannelli
Dal Lago Bruno;
2016-01-01
Abstract
A long series of cyclic and pseudodynamic tests has been performed on a full scale prototype of precast structure at the European Laboratory of Structural Assessment-ELSA of the Joint Research Centre – JRC of Ispra within the scope of the European Research Project for SME Associations “SAFECLADDING” (Grant Agreement n. 314122 of 2012), with the aim of investigating and setting up the design of innovative connection devices of cladding panels. The recent earthquakes showed the inadequacy of the present design criteria of these connections. Three possible solutions of the problem have been proposed, consisting of isostatic, integrated or dissipative systems. For each solution the effectiveness of the connection devices under earthquake conditions has been tested, both for vertical and horizontal panels, at different levels of seismic intensity and with different arrangement of the fastening system. The paper presents, in addition to the experimental results, all the technological difficulties that had to be overcome to reach a satisfactory behaviour of the different connection systems, showing how the experimental assessment also on full scale prototypes is necessary to find out the solution of unexplored problems.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.