Title : SEISMIC RESPONSE OF A FULL SCALE UNREINFORCED STONE MASONRY BUILDING WITH STIFFENED DIAPHRAGMS
Authors : G. Magenes(1,2), A. Penna(1,2), I. Senaldi(1), M. Rota and A. Galasco(1)
Publication :
Volume :
Pages : 12-Jan
Price : 250
Abstract : Shaking table tests on three full-scale two-storey single-room prototype buildings in undressed double-leaf stone masonry have been carried out at EUCENTRE, as a part of an extensive experimental research project concerning the evaluation and reduction of the seismic vulnerability of existing stone masonry structures. The three building prototypes share the same reference geometry and construction materials, being representative of existing unreinforced stone masonry structures in Italy. The first prototype is characterized by flexible wooden diaphragms, without any specific anti-seismic design or detailing, whereas in the second and third buildings different strengthening interventions were simulated on structures theoretically identical to the first one, improving their wall-to-floor and wall-to-roof connections and increasing diaphragm stiffness. In particular, in the third specimen, which is the subject of this paper, ring beams were employed to improve the diaphragm connections to the walls and a collaborating R.C. slab and multi-layer plywood panels were used to stiffen the floor and roof diaphragms, respectively. The paper briefly presents the experimental results obtained during the shaking table tests of the third building prototype. The results obtained permitted the calibration of an equivalent frame model representative of the nonlinear global behaviour of the structure, which was used to simulate the seismic response of the building.