Substructure Identification using Measured Responses

초록

The paper provides a methodology of identifying a substructure model when sectional and material properties of the structure are not the a priori information. A substructure model is identified by estimating boundary spring constants and stiffness properties of the substructure. Both of static and frequency-domain system identification methods have been applied using responses measured at limited locations within the substructure. When a frequency-domain system identification method is applied, mass properties have been assumed as known. It is required for an identified substructure model that its analytically obtained response be consistent with the actual behavior of the part of the structure. The proposed method has been examined through simulation studies and application to an actual bridge structure. Limitations of the method are also discussed in the paper.