Estimation of Maximum Drift of MDOF Shear Structures Using Only One Accelerometer

Estimation of Maximum Drift of MDOF Shear Structures Using Only One Accelerometer

Kangqian Xu, Akira Mita

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Abstract. This paper presents a new method to estimate maximum drifts, relative displacements between adjacent floors, of all stories of multi-degree-of-freedom (MDOF) shear structures using only one floor’s absolute acceleration time history response under the ground excitation. The absolute acceleration and relative displacement are formulated in modal coordinates and the state-space expression is derived. Then the numerical simulation for a three-story structure was conducted to verify the performance of the state-space equation. The comparison of the estimated state and input with actual values is made and shows the good agreement. In addition, the relative displacement time histories of all floors were obtained, and the errors of maximum displacements and inter-story drifts were analyzed. The robustness against environmental noise was also investigated by numerical simulations as well. The results of simulations indicate the estimation is satisfactory, and very robust against the environmental disturbance.

Maximum Inter-Story Drift, Shear Structure, Modal Coordinates, State-Space Equation, Kalman Filter

Published online 2/20/2021, 8 pages
Copyright © 2021 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Kangqian Xu, Akira Mita, Estimation of Maximum Drift of MDOF Shear Structures Using Only One Accelerometer, Materials Research Proceedings, Vol. 18, pp 113-120, 2021


The article was published as article 14 of the book Structural Health Monitoring

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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