Experimental Error Effects in Pseudodynamic Testing
Publication: Journal of Engineering Mechanics
Volume 116, Issue 4
Abstract
The pseudodynamic test method is a hybrid, computer‐controlled, experimental technique that adopts a step‐by‐step integration procedure to analyze the seismic behavior of structures. Since the response of the structural specimen in each step of a test is evaluated with the experimental data obtained in the previous step or steps, experimental errors introduced in each step are accumulated in the numerical procedure. The error‐propagation characteristics of several integration algorithms that are currently used for such tests are examined. Mathematical equations that characterize the cumulative growth of experimental errors are formulated, and used to evaluate the error‐amplification effects of the algorithms. It is shown that the magnitude of cumulative errors depends on the numerical properties of the algorithm, the frequency characteristics of the specimen, and the nature of experimental errors. Moreover, it is found that numerically computed displacements should be used instead of experimentally measured displacements in the step‐by‐step computations.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 116 • Issue 4 • April 1990
Pages: 805 - 821
Copyright
Copyright © 1990 ASCE.
History
Published online: Apr 1, 1990
Published in print: Apr 1990
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