Evaluating the Quality of Hybrid Simulation Test Using an Energy-Based Approach

Abstract eng:
Hybrid simulation is an experimental method which combines the well known substructure testing techniques with numerical finite element simulation to study the response of a structural system to an excitation. The quality of a hybrid simulation test depends strongly on the magnitude of measurement and control errors associated with the experimental substructures. An on-line error monitoring method is proposed to asses the severity of experimental errors during a hybrid simulation, This method predicts the accuracy of the simulation results during the simulation. Quantitative estimates of error are derived based on energy added to the hybrid model due to measurable errors in the experimental substructures. A recently completed hybrid simulation of seismic response of an innovative lateral load resisting system, a suspended zipper braced frame, is used to demonstrate the effectiveness of the proposed on-line error monitoring indicators. It is shown that a well-calibrated simulation conducted using state-of-the-art equipment can deliver accurate results.

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