TY - GEN
T1 - Estimation of maximum drift of mdof shear structures using only one accelerometer
AU - Xu, Kangqian
AU - Mita, Akira
N1 - Funding Information:
The study was partially supported by the ‘Design the Future’ Award of Keio University and the KLL (Keio Leading-edge Laboratory) 2019 Ph.D. Program Research Grant.
Publisher Copyright:
© 2021, Association of American Publishers. All rights reserved.
PY - 2021
Y1 - 2021
N2 - 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.
AB - 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.
KW - Kalman Filter
KW - Maximum Inter-Story Drift
KW - Modal Coordinates
KW - Shear Structure
KW - State-Space Equation
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U2 - 10.21741/9781644901311-14
DO - 10.21741/9781644901311-14
M3 - Conference contribution
AN - SCOPUS:85103551824
SN - 9781644901304
T3 - Materials Research Proceedings
SP - 113
EP - 120
BT - Structural Health Monitoring - 8th Asia Pacific Workshop on Structural Health Monitoring, 8APWSHM 2020, proceedings
A2 - Rajic, N.
A2 - Veidt, M.
A2 - Mita, A.
A2 - Takeda, N.
A2 - Chiu, W.K.
PB - Association of American Publishers
T2 - 8th Asia-Pacific Workshop on Structural Health Monitoring, APWSHM 2020
Y2 - 9 December 2020 through 11 December 2020
ER -