System Identification of a Large Structure Using Pseudo-Dynamic Test Data

by Paramsothy Jayakumar, Engineering Mechanics Research Corp, United States,

Document Type: Proceeding Paper

Part of: Seismic Engineering: Research and Practice


This paper deals with structural modeling and the determination of optimal nonlinear models by applying system identification techniques to inelastic pseudo-dynamic test data from a full-scale, six story steel structure. Pseudo-dynamic testing is a quasi-static procedure for subjecting full-scale structures to simulated earthquake response. The nonlinear hysteretic behavior of the structure during strong ground motions is represented by a general class of Masing models. A simple model belonging to this class is chosen whose parameters can be estimated from material properties and structural plans, thereby making this model potentially useful during design stages. A hysteretic system identification program, HYSID, is developed to determine the optimal estimates of the model parameters from the pseudo-dynamic data. The optimal model is then examined for its prediction capability.

Subject Headings: Field tests | Scale models | Full-scale tests | Ground motion | Steel structures | Dynamic structural analysis | System analysis | Inelasticity

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