ORIGINAL RESEARCH PAPER Seismic behaviour of timber-laced stone masonry buildings before and after interventions: shaking table tests on a two-storey masonry model Charalambos Mouzakis 1 • Chrissy-Elpida Adami 2 • Lucia Karapitta 1 • Elizabeth Vintzileou 2 Received: 2 December 2016 / Accepted: 26 August 2017 Ó Springer Science+Business Media B.V. 2017 Abstract The present work focuses on the seismic behaviour of timber-laced masonry buildings with timber floors, before and after the application of intervention techniques. A two-storey building with timber ties (scale 1:2) was subjected to biaxial seismic actions. Prior to the execution of shaking table tests, the dynamic characteristics of the model were identified. The base acceleration was increased step-wise until the occurrence of significant but repairable damages. Afterwards, the masonry was strengthened by means of grouting, whereas the diaphragm action of the top floor of the building was enhanced and the model was re-tested. The tests on the timber reinforced model before strengthening show that the presence of timber ties within the masonry elements contributes to improved seismic behaviour. The performance of the model after strengthening shows that the selected intervention techniques led to a significant improvement of the seismic behaviour of the building model. Keywords Timber-laced masonry Á Three-leaf stone masonry Á Diaphragm action Á Grout injection Á Seismic behaviour Á Shaking table tests & Charalambos Mouzakis harrismo@central.ntua.gr & Chrissy-Elpida Adami adamis@central.ntua.gr 1 Laboratory of Earthquake Engineering, Faculty of Civil Engineering, National Technical University of Athens, 9 Iroon Polytechniou str, 15773 Athens, Greece 2 Laboratory of Reinforced Concrete, Faculty of Civil Engineering, National Technical University of Athens, 9 Iroon Polytechniou str, 15773 Athens, Greece 123 Bull Earthquake Eng DOI 10.1007/s10518-017-0220-9