ANIDIS - L'ingegneria Sismica in Italia, ANIDIS 2013 - XV Convegno

Dimensione del carattere:  Piccola  Media  Grande

Design of Shaking-Table Tests on Post-installed Anchors for Concrete and Masonry Applications

Nicola Mazzon, Marco Abate, Francesca da Porto, Claudio Modena

Ultima modifica: 2013-06-04

Sommario


The seismic safety of non-structural elements especially in the case of relevant components on strategic structures, such as hospitals, fire and police stations as well as any further building for the emergency management, is linked to the behaviour of connections with the structure.

This paper discusses the design of an experimental campaign to study the seismic behaviour of different types of post-installed anchors for concrete and masonry applications. This experimental campaign involves the study of fasteners with different functioning principles, namely bond, expansion and undercut. A preliminary literature review of actual codes and guidelines focused on this topic led to select a tri-axial shaking-table test. These norms has been also considered to define both the dynamic input to be applied and the testing procedure. A FE model has been developed to define the layout of structures to be tested. This led to select two cross-shaped structures – four walls each - in order to reproduce different support conditions for the considered fixtures: a full RC structure and a RC frame with masonry infill walls. The influence of cracks on the behaviour of anchors will be also considered on the design of the RC structure. The numerical model has been also used to define the mass to be applied on each anchor. The selection and the design of fasteners were also based on the actual guidelines on this field. The paper presents also the definition of quantities to be monitored and adopted instruments, in order to record relevant accelerations and displacements. This will allow the overall behaviour of anchors to be deeply studied.


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