METHODS FOR IDENTIFYING SUB-REGIONAL MATERIAL PARAMETERS OF CONCRETE DAMS USING MODAL DATA

摘要

Methods for identifying sub-regional material parameters of concrete dams using incomplete rnodal data are presented. With the measurements of the first frequency and incomplete mode shape, identification methods were built by both the output error approach and the minimum deviation approach. The minimum deviation approach was introduced as physical constraints to the output error approach, allowing the output error-minimum deviation coupled approach to be developed. The simulated annealing-simplex shape algorithm was applied to solve the identification models. Numerical simulations were carried out with noisy incomplete measurements to illustrate the robustness of the methods.