A 2-STEP STRUCTURAL DAMAGE DETECTION APPROACH WITH LIMITED INSTRUMENTATION

This paper describes a to-step damage detection and health monitoring approach that was developed for large and complex structures with a li mited number of measurements. The first step identifies a general area of structural damage using the optimal model update method and a hybr id model reduction/eigenvector expansion technique. The second step lo cates a specific damaged structural component using a design sensitivi ty technique based on a priori information from the first damage detec tion step. Performance of the proposed damage detection approach was d emonstrated with testing and analysis of a ten-bay hexagonal truss str ucture. Procedures developed for the damage detection are also directl y applicable to test/dynamic math model correlation when the number of measurements is limited.