To reduce the number of installed sensors in structural health monitoring,a non-contact damage identification method directly using the vibration response is proposed.The auto-correlation function of the vibration response is established as the damage index,which is calculated from different measurement points before and after damage.Sensitivity analysis reveals a sudden change around the damage location,indicating its sensitive to damage.Numerical simulation results of the damage identification for a 6-story shear frame demonstrate that the damage location can be correctly identified.Non-contact damage identification experiment of a 6-story shear frame,using high-speed camera,and a 9-span truss bridge,using mobile phone,validate the results obtained from numerical simulation.This suggests that the proposed damage identification method has the potential for online health monitoring of engineering structures.
维普
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