PMID- 35696409
OWN - NLM
STAT- MEDLINE
DCOM- 20220615
LR  - 20220718
IS  - 1932-6203 (Electronic)
IS  - 1932-6203 (Linking)
VI  - 17
IP  - 6
DP  - 2022
TI  - An experimental study of tuned liquid column damper controlled multi-degree of 
      freedom structure subject to harmonic and seismic excitations.
PG  - e0269910
LID - 10.1371/journal.pone.0269910 [doi]
LID - e0269910
AB  - A tuned liquid column damper (TLCD) is a passive vibration control device that 
      not only mitigates unwanted structural vibrations but also acts as a water 
      storage facility in a building. These aspects of TLCD make its application 
      specifically suited for building structures. Previously, many experimental works 
      on TLCDs have been conducted considering a single degree of freedom (SDOF) 
      structure. However, the performance of TLCDs to control the response of 
      multi-degree of freedom (MDOF) structure has rarely been studied experimentally. 
      Therefore, this study has investigated the performance of a tuned liquid column 
      damper (TLCD) on a multi-degree of freedom (MDOF) structure using shake table 
      testing. A four-storey steel frame structure equipped with TLCD at the top of the 
      fourth storey has been studied. Experimental normalized frequency response curves 
      for MDOF structure equipped with TLCD have been determined. For this purpose, a 
      series of harmonic loadings including frequencies 0.65 Hz, 1.17 Hz, 1.30 Hz, 1.43 
      Hz and 1.95 Hz have been applied in addition to historic earthquake loading. Peak 
      and root-mean-square (RMS) accelerations have been discussed in detail for all 
      the applied loadings at each storey level of the structure. For comparison 
      purposes, the percentage reductions in peak and RMS accelerations have been 
      calculated and compared. Also, RMS displacements and inter-storey drifts have 
      been presented for resonant and seismic excitations. Both in time and frequency 
      domains, responses of controlled MDOF structure have been analyzed and compared 
      with uncontrolled structure. Results confirmed that TLCD has improved the MDOF 
      structure responses at harmonic loadings frequencies near resonance and historic 
      earthquake excitations. Furthermore, the improvement in the responses of MDOF 
      structure with TLCD is more prominent at harmonic loadings compared to historic 
      earthquake loading.
FAU - Shah, Mati Ullah
AU  - Shah MU
AUID- ORCID: 0000-0002-7863-5781
AD  - School of Civil and Environmental Engineering (SCEE), National University of 
      Sciences and Technology (NUST), Islamabad, Pakistan.
FAU - Usman, Muhammad
AU  - Usman M
AUID- ORCID: 0000-0003-2262-6429
AD  - School of Civil and Environmental Engineering (SCEE), National University of 
      Sciences and Technology (NUST), Islamabad, Pakistan.
LA  - eng
PT  - Journal Article
DEP - 20220613
PL  - United States
TA  - PLoS One
JT  - PloS one
JID - 101285081
RN  - 12597-69-2 (Steel)
SB  - IM
MH  - *Earthquakes
MH  - Steel
MH  - *Vibration
PMC - PMC9191723
COIS- The authors have declared that no competing interests exist.
EDAT- 2022/06/14 06:00
MHDA- 2022/06/16 06:00
PMCR- 2022/06/13
CRDT- 2022/06/13 13:35
PHST- 2022/02/23 00:00 [received]
PHST- 2022/05/31 00:00 [accepted]
PHST- 2022/06/13 13:35 [entrez]
PHST- 2022/06/14 06:00 [pubmed]
PHST- 2022/06/16 06:00 [medline]
PHST- 2022/06/13 00:00 [pmc-release]
AID - PONE-D-22-05507 [pii]
AID - 10.1371/journal.pone.0269910 [doi]
PST - epublish
SO  - PLoS One. 2022 Jun 13;17(6):e0269910. doi: 10.1371/journal.pone.0269910. 
      eCollection 2022.