Design and Verification of a Dynamic Experimental Campaign on Anchoring Systems Through Macro and Micro Numerical Models

Abstract eng:
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 often linked to the behaviour of connections with the structure [1-3]. This paper presents the design of a dynamic experimental campaign on a whole structure on the basis of two different numerical simulations, an overall macro model and a detailed micro model. The whole experimental program involves the study of fasteners with different functioning principles, namely bond, expansion and undercut. The calibration of the numerical simulation of an anchoring system, among those considered in the laboratory campaign, is based on the results of tension and shear tests performed on the selected fastening. This paper discusses both the design of this experimental campaign and the calibration of the local model for an anchor, comparing numerical and experimental results [4]. The first macro model considers the whole structure to be tested, in order to study the modification of the seismic input through the height of the specimen. This preliminary analysis is developed for all the considered fasteners. The design of masses, in terms of weight, is based on these global FE models. This numerical simulation is performed for all the considered anchoring systems. The second micro model, based on the results of the first one, analyses in detail the dynamic behaviour of a single anchor. The overall strength and the loadslipping behaviour is studied and compared with the experimental results. This micro model is based on a preliminary calibration obtained from quasi-static tests performed on the considered fastening system. The comparison between numerical and experimental results confirms the good agreement of the predicted behaviour with that observed during the quasi static tests on a single anchor. This will also allow to extent the FE simulation to different loading conditions as well as to develop parametric studies for different applications, especially in the case of dynamic numerical analyses.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket