Topics on the dynamics of civil structures : proceedings of the 30th IMAC, a conference on structural dynamics, 2012 / 由 International Modal Analysis Conference (30th : 2012 : Jacksonville, Fla.), Caicedo, J. M., editor, Catbas, F. N., editor, Cunha, A., editor, Racic, V., editor, Reynolds, P., editor, Salyards, K., editor