2023 Volume 88 Issue 806 Pages 577-585
The seismic response records of acceleration and strain of a three-story steel structure building were obtained and analyzed. From the strain measurement, the shear force actually applied to the column or the story could be obtained, and the frame stiffness could be calculated by combining this with the acceleration response measurement result. It was shown that the change in frame stiffness could be separated from the change in predominant frequency, and that the change in the frame stiffness was not as great as the change in the predominant frequency.
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