STRUCTURAL SYSTEM-IDENTIFICATION .2. EXPERIMENTAL-VERIFICATION

The investigation reported in this paper looks into the application of a number of system-identification techniques to problems of earthquak e engineering. A number of techniques for structural-system identifica tion have been developed over the past few years. Many of these techni ques have been successful at identifying properties of linearized and time-invariant equivalent structural systems. Most of these techniques were verified using mathematical models simulated on the computer. Tn this paper, a number of structural-identification algorithms are revi ewed and applied to the identification of structural systems subjected to earthquake excitations. The algorithms are applied to experimental data obtained in controlled laboratory conditions. The data pertain t o the acceleration records from two building models subjected to vario us loading conditions. The performance of the various identification a lgorithms is critically assessed,and guidelines are obtained regarding their suitability to various engineering applications.