PMID- 34071022
OWN - NLM
STAT- MEDLINE
DCOM- 20210604
LR  - 20210615
IS  - 1424-8220 (Electronic)
IS  - 1424-8220 (Linking)
VI  - 21
IP  - 11
DP  - 2021 May 23
TI  - Absolute Displacement-Based Formulation for Peak Inter-Story Drift Identification 
      of Shear Structures Using Only One Accelerometer.
LID - 10.3390/s21113629 [doi]
LID - 3629
AB  - Only one accelerometer is used in this paper for estimating the maximum 
      inter-story drifts and time histories of the relative displacements of all 
      stories of multi-degree-of-freedom (MDOF) shear structures under seismic 
      excitation. The calculation based on the data of one sensor using a conventional 
      method is unstable, and when modal coordinates are used, higher modes should be 
      included, which is different from the estimation based on the responses recorded 
      by many accelerometers. However, the parameters of the higher modes of structures 
      are difficult to obtain from structures under small excitations. To overcome this 
      difficulty, the recorded absolute acceleration is converted into the absolute 
      displacement, and a state-space equation is formulated. Numerical simulations of 
      a nine-story structure were conducted to check the applicability, robustness 
      against environmental noise, and optimal installation location of the 
      accelerometer of the proposed approach. In addition, the effects of the higher 
      modes were analyzed in terms of the number of accelerometers and type of 
      response. Finally, the proposed approach was validated in a simple experiment. 
      The results indicate that it can accurately estimate the time histories of the 
      relative displacements and maximum inter-story drifts of all floors when one 
      accelerometer is used and just the first two modal parameters are incorporated in 
      the model. Furthermore, the approach is robust against environmental noise.
FAU - Xu, Kangqian
AU  - Xu K
AD  - Department of System Design Engineering, Keio University, Yokohama 223-8522, 
      Japan.
FAU - Mita, Akira
AU  - Mita A
AD  - Department of System Design Engineering, Keio University, Yokohama 223-8522, 
      Japan.
LA  - eng
GR  - JSPS KAKENHI 18H00968/Japan Society for the Promotion of Science/
PT  - Journal Article
DEP - 20210523
PL  - Switzerland
TA  - Sensors (Basel)
JT  - Sensors (Basel, Switzerland)
JID - 101204366
SB  - IM
MH  - *Acceleration
MH  - *Accelerometry
PMC - PMC8197140
OTO - NOTNLM
OT  - Kalman filter
OT  - maximum inter-story drift
OT  - modal coordinates
OT  - shear structure
COIS- The authors declare no conflict of interest.
EDAT- 2021/06/03 06:00
MHDA- 2021/06/05 06:00
PMCR- 2021/05/23
CRDT- 2021/06/02 01:30
PHST- 2021/04/11 00:00 [received]
PHST- 2021/05/21 00:00 [revised]
PHST- 2021/05/21 00:00 [accepted]
PHST- 2021/06/02 01:30 [entrez]
PHST- 2021/06/03 06:00 [pubmed]
PHST- 2021/06/05 06:00 [medline]
PHST- 2021/05/23 00:00 [pmc-release]
AID - s21113629 [pii]
AID - sensors-21-03629 [pii]
AID - 10.3390/s21113629 [doi]
PST - epublish
SO  - Sensors (Basel). 2021 May 23;21(11):3629. doi: 10.3390/s21113629.