Structural damage identification with power spectral density transmissibility: Numerical and experimental studies
MetadataShow full item record
This paper proposes a structural damage identification approach based on the power spectral density transmissibility (PSDT), which is developed to formulate the relationship between two sets of auto-spectral density functions of output responses. The accuracy of response reconstruction with PSDT is investigated and the damage identification in structures is conducted with measured acceleration responses from the damaged state. Numerical studies on a seven-storey plane frame structure are conducted to investigate the performance of the proposed damage identification approach. The initial finite element model of the structure and measured acceleration measurements from the damaged structure are used for the identification with a dynamic response sensitivity-based model updating method. The simulated damages can be identified accurately without and with a 5% noise effect included in the simulated responses. Experimental studies on a steel plane frame structure in the laboratory are performed to further verify the accuracy of response reconstruction with PSDT and validate the proposed damage identification approach. The locations of the introduced damage are detected accurately and the stiffness reductions in the damaged elements are identified close to the true values. The identification results demonstrated the accuracy of response reconstruction as well as the correctness and efficiency of the proposed damage identification approach.
Showing items related by title, author, creator and subject.
Improved damage identification in bridge structures subject to moving loads: Numerical and experimental studiesLi, Jun; Law, S.; Hao, Hong (2013)This paper proposes a damage identification approach in bridge structures under moving vehicular loads without knowledge of the vehicle properties and the time-histories of moving interaction forces. The dynamic response ...
Substructure damage identification based on response reconstruction in frequency domain and model updatingLi, Jun; Law, S.; Ding, Y. (2012)A substructural damage identification approach based on dynamic response reconstruction in frequency domain is proposed with numerical and experimental verifications. The response reconstruction is based on transforming ...
Damage Identification and Optimal Sensor Placement for Structures under Unknown Traffic-Induced VibrationsLi, Jun; Hao, Hong; Chen, Z. (2015)This paper proposes a damage-identification and optimal sensor-placement approach for structures under unknown traffic-induced vibrations. Response reconstruction is performed for structures under traffic-induced vibrations ...