Abstract
The traditional construction of masonry infills adjacent to RC structural elements is still widely adopted in European countries, including seismically active regions. Given the repeated field observations from damaging earthquakes, pointing to unacceptably high levels of masonry infill damage, the present study is motivated by the need to improve further the European seismic design approach for new RC structures with masonry infills, in order to exclude the poor seismic behaviour probably caused by deficiencies in the verification procedure. Since the in-plane damage to non-structural panels is commonly controlled through the limitation of inter-storey drifts, the possibility to introduce more effective verification criteria, accounting for structural properties, infill layouts and masonry properties is explored. Therefore, starting from the assumption that analyses and verifications in the design of buildings are commonly accomplished neglecting the presence of infills, results of extensive nonlinear numerical analyses for different building configurations are examined. As a result, a simplified procedure for the prediction of expected inter-storey drifts for infilled structures, based on the corresponding demands of bare configurations, in function of a simple parameter accounting for structural properties and the presence of infills, is introduced. Possible implications of the proposed approach aimed at the improvement of the current design provisions are discussed.
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Acknowledgements
This work, conducted at the University of Pavia and at Eucentre of Pavia in Italy, was funded by the ANDIL Assolaterizi and through the Executive Project DPC-RELUIS 2010–2013 and DPC-RELUIS 2014–2016. The financial support received is gratefully acknowledged.
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Hak, S., Morandi, P. & Magenes, G. Prediction of inter-storey drifts for regular RC structures with masonry infills based on bare frame modelling. Bull Earthquake Eng 16, 397–425 (2018). https://doi.org/10.1007/s10518-017-0210-y
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DOI: https://doi.org/10.1007/s10518-017-0210-y