System Identification for Non-Destructive Assessment of Structures: Lessons Learned

Abstract

For development and application of the System Identification in Dynamic Design Solution and Health Monitoring of Civil Engineering Structures, based on author's awarded project (MF-046), related facility has been established at the Department of Civil Engineering, Ondokuz Mayis University, Turkey in 2002-2003 years. And it was the first in this field. FE model updating was performed through an optimization procedure that starts from a sensitivity analysis to find the most influential model parameters on the modal properties of the system. The updated model was used as a benchmark to define the properties of a model, with which an assessment of the vulnerability of the structure. The presented research offers an overview of monitoring systems, alongside highlighting major findings concerning the dynamic response properties of monitored structures, with a particular focus on: -finite element calibration of reinforce concrete and steel structures; steel structures with cable elements; steel structures retrofitted with CFRP; possibility using micro tremor data on ground level for ambient excitation in shaking tables; aliasing (bound checking) problems for extracting modal and physical parameters; and others like this.