Application of tuned liquid column ball damper (TLCBD) for improved vibration control performance of multi-storey structure


Autoři: Muhammad Tanveer aff001;  Muhammad Usman aff001;  Imdad Ullah Khan aff001;  Shakil Ahmad aff001;  Asad Hanif aff002;  Syed Hassan Farooq aff001
Působiště autorů: School of Civil & Environmental Engineering, National University of Science and Technology (NUST), Sector H-12, Islamabad, Pakistan aff001;  Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau S.A.R China aff002
Vyšlo v časopise: PLoS ONE 14(10)
Kategorie: Research Article
doi: 10.1371/journal.pone.0224436

Souhrn

Tuned liquid column ball damper (TLCBD) is a passive control device used for controlling the building vibrations induced from wind or earthquakes. TLCBD is a modified form of conventional tuned liquid column damper (TLCD). This paper studies the effect of TLCBD on the four-storey steel frame structure. The performance of the TLCBD is also compared with conventional TLCD. The analytical model of both TLCD and TLCBD is presented here. The effectiveness of these analytical models is examined experimentally by series of shaking table tests under different excitation levels including harmonic loadings and seismic excitations. In TLCBD, the vibration is reduced significantly as compared to TLCD by using steel ball as a moving orifice. The difference in diameter of steel ball and tube, containing the liquid column, acts as an orifice which moves with the movement of the ball. This moving orifice phenomenon enhanced the vibration reduction effect by resisting the water motion in the TLCBD. Root mean square (RMS) and peak values of acceleration were calculated for each loading and each storey of uncontrolled and controlled structures. Comparison of the time histories of controlled and uncontrolled structures for different loadings is also reported. Results indicate that the TLCBD is more effective in the earthquake scenarios as compared to the harmonic excitations. The TLCBD controls the vibration of the primary structure significantly in vibration reduction.

Klíčová slova:

Accelerometers – Built structures – Resonance frequency – Steel – Stiffness – Vibration – Vibration engineering – Equations of motion


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Článek vyšel v časopise

PLOS One


2019 Číslo 10