- 日本建築学会構造系論文集 (ISSN:13404202)
- vol.63, no.508, pp.93-100, 1998
A methodology to locate and assess structural damage in reinforced concrete structures from the known modes and natural frequencies of the structures is presented. The damage is defined as the stiffness loss of the structures. Using the perturbation method, the dynamical characteristic changes and the corresponding structural properties such as the stiffness changes are related so that the damaged floors of a structure are located. With the use of the Baruch and Bar Itzhack equations, the perturbed stiffness matrix is adjusted. Comparing the non-damaged stiffness matrix with the obtained perturbed stiffness matrix, the structural elements' damage is located and assessed. The sensitivity matrix that defines the lateral stiffness' sensitivity to the elemental stiffness changes is introduced.