The seismic performance of non-structural elements is nowadays recognized to be a key issue in the seismic design as well as in the earthquake related losses estimation. The evaluation of the seismic demand on non-structural elements is of paramount importance for seismic design. For this reason, many modern building codes provide simplified relationships in order to define design inertia forces on acceleration sensitive non-structural elements. Researchers demonstrated that the formulations proposed by building codes are often not able to predict realistic accelerations on non-structural elements. In the last few years several design oriented simplified methodologies have been developed to define the floor response spectra in buildings of different typologies, including reinforced concrete (RC) frame buildings, considering the potential nonlinear behaviour of the structures. Despite these significant efforts, some issues are still open and require further investigations. Current methodologies generally neglect the influence of masonry infills in the evaluation of floor response spectra. In this paper, the influence of masonry infills on floor response spectra for masonry infilled RC buildings subjected to frequent (serviceability level) earthquakes is investigated. The study focuses on typical European RC buildings. The results demonstrate that masonry infills, in particular if the structures behave elastically, cannot be neglected in the evaluation of floor response spectra.
Seismic demand on non-structural elements: Influence of masonry infills on floor response spectra
Daniele Perrone
;
2018-01-01
Abstract
The seismic performance of non-structural elements is nowadays recognized to be a key issue in the seismic design as well as in the earthquake related losses estimation. The evaluation of the seismic demand on non-structural elements is of paramount importance for seismic design. For this reason, many modern building codes provide simplified relationships in order to define design inertia forces on acceleration sensitive non-structural elements. Researchers demonstrated that the formulations proposed by building codes are often not able to predict realistic accelerations on non-structural elements. In the last few years several design oriented simplified methodologies have been developed to define the floor response spectra in buildings of different typologies, including reinforced concrete (RC) frame buildings, considering the potential nonlinear behaviour of the structures. Despite these significant efforts, some issues are still open and require further investigations. Current methodologies generally neglect the influence of masonry infills in the evaluation of floor response spectra. In this paper, the influence of masonry infills on floor response spectra for masonry infilled RC buildings subjected to frequent (serviceability level) earthquakes is investigated. The study focuses on typical European RC buildings. The results demonstrate that masonry infills, in particular if the structures behave elastically, cannot be neglected in the evaluation of floor response spectra.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
