Seismic behaviour of an unreinforced masonry building with various floor systemsSeismic behaviour of an unreinforced masonry building with various floor systems Αφίσα σε Συνέδριο Conference Poster 2015-10-142008enThis paper shows the influence of floors rigidity on the seismic behavior of stonemasonry buildings with different floor systems. The construction of horizontal reinforced concrete beams at floor levels in parallel with wooden floors or the replacement of wooden floors with reinforced concrete slabs increase the horizontal diaphragm in comparison with the wooden floor something that relates with the reduction of maximum displacements and plastic strains to special areas, which are critical for the structural safety. Due to changes of mass and stiffness topical stress concentrations are developed near the base and the openings of the first story http://creativecommons.org/licenses/by/4.0/The Ninth International Conference on Computational Structures Technology Stavroulaki Maria Σταυρουλακη Μαρια Ch.K. Amanatidou Aseismic design Seismic design earthquake resistant design aseismic design seismic design