Damage Identification of Structures Using Limited Power Mode Shapes and Power Modal Curvature

摘要

Damages of different forms occur frequently within the life of structures due to its aging, action of the environment, improper design, inferior construction and accidental loading, etc. Several damage identification methods are available using different techniques like modal flexibility, curvature mode shapes, and modal strain energy to detect the location and magnitude of damage of an existing structure. In this paper, power mode shape and limited power modal curvature index are used to identify damage in different structure. The parameters (flexural rigidity, axial rigidity, etc.) are updated using the inverse approach in MATLAB interface. The use of noise in the simulation further enhances the accuracy of the algorithm.