Affiliations: IMME, University Central of Venezuela. IMME-UCV, apto
postal 50.361, Caracas 1050-A, Venezuela | Laboratoire de Mécanique, University of Marné
la Vallée, Laboratoire de Mécanique, Université de Marne la
Vallée (France), 5 Bd Descartes, Cité Descartes, 77454 Marne
la-Vallée, Cedex 2, France
Abstract: This article presents an original identification method for the
assessment of flexure and shear stiffness of cantilever structures or shear
wall buildings. Required data include an initial (theoretical) model, an
estimation of lumped mass values (by floor) and an experimental evaluation of
two eigenvalues (modal frequencies and their modal shapes). The method
estimates coefficients whenever flexural (EI) or shear (GA) values are relevant
or irrelevant. An initial formula includes both shear and flexural components.
Furthermore, particular developments are carried out for particular cases of
irrelevant shear or flexural deformations. A numerical simulation of a real
chimney is performed to study the effectiveness of the methodology in
identifying damage under noise conditions. A dynamic-test experiment is carried
out on a steel cantilever which suffers damage in two sections. The result
obtained from the application of the proposed methodology is satisfactory in
both numerical and experimental cases, identifying precisely the stiffness
changes in the system.
