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PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING
Edited by: B.H.V. Topping and P. Iványi
Overturning of Three-dimensional Monolithic Objects of Art under Seismic Excitation
A. Contento, D. Zulli and A. Di Egidio
Department of Civil, Architecture-Construction and Environmental Engineering
A. Contento, D. Zulli, A. Di Egidio, "Overturning of Three-dimensional Monolithic Objects of Art under Seismic Excitation", in B.H.V. Topping, P. Iványi, (Editors), "Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 175, 2013. doi:10.4203/ccp.102.175
Keywords: three-dimensional rigid body, monolithic objects of art, overturning, seismic excitations.
A model of three-dimensional rigid body with a rectangular base, able to rock about a side or a vertex of the base is used to evaluate the seismic response of monolithic objects of art. The eccentricity of the center of mass with respect to the geometrical center of the body is also considered. The equations of motion are obtained through the general balance principle. Three different Italian registered earthquakes, with different spectral characteristics, are used to excite the body in different directions. The analyses are conducted with the aim of highlighting the role of the direction of the seismic excitation and some geometrical and mechanical characteristics of the body. In significant ranges of the parameters, the results obtained with a bidimensional model, that does not consider the three-dimensional rocking motions on a vertex of the base, are not on the safe side. It is found, in fact, that in several conditions the overturning of the three-dimensional block takes place for amplitudes of excitation smaller than those able to overturn the two-dimensional block.
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