Seismic behavior of three-leaf stone masonry buildings before and after interventions: Shaking table tests on a two-storey masonry model

The aim of this work is to reach a better understanding of the seismic behaviour of historic three-leaf stone masonry buildings with timber floors, before and after interventions. For this purpose, shaking table tests were performed on a building model (scale 1:2). Initially, the dynamic characteristics of the model were identified. Subsequently, biaxial earthquake tests were performed with the base acceleration increased step-wise until the occurrence of repairable damages. Afterwards, the masonry was strengthened by means of grouting and the diaphragm action of the floors was enhanced. Then, the strengthened model was re-tested. The comparison of the performance of the model under earthquake actions before and after strengthening shows that the selected intervention techniques significantly improved the seismic behaviour of the structure.

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