NEHRP Clearinghouse

Modeling and Identification in Structural Dynamics.
Jayakumar, P.
National Science Foundation, Washington, DC., cJanuary 1987, 220 p.
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Analytical modeling of structures subjected to ground motions is an important aspect of fully dynamic earthquake-resistant design. In general, linear models are only sufficient to represent structural responses resulting from earthquake motions of small amplitudes. However, the response of structures during strong ground motions is highly non-linear and hysteretic. System identification is an effective tool for developing analytical models from experimental data. Testing of full-scale prototype structures remains the most realistic and reliable source of inelastic seismic response data. Pseudo-dynamic testing is a recently developed quasi-static procedure for subjecting full-scale structures to simulated earthquake response. The present study deals with structural modeling and the determination of optimal linear and nonlinear models by applying system identification techniques to elastic and inelastic pseudo-dynamic data from a full-scale, six story steel structure.
; Dynamic response; Elastic properties; Earthquake resistant structures; Fatigue (Materials); Steel structures; Graphs (Charts); Vibration; Mechanical properties; Cyclic loads; Design; Dynamic structural analysis