Seismic Response Control with Density-Variable Tuned Liquid Dampers


In this paper, the seismic effectiveness of a density-variable tuned liquid damper (DVTLD) with a sloping bottom is experimentally investigated through a series of shake table tests on a 1/4-scale, 3-story frame structure and numerically simulated by a new semi-analytical model. Special attention was given to reducing the first peak and maximum response under near- and far-field ground motions, and the robustness of a density-variable control system consisting of multiple DVTLDs with closely-spaced frequencies. Adaptable to earthquake excitations, the density-variable control system has been demonstrated to be more effective and more robust than its corresponding traditional tuned liquid damper in suppressing story drift and floor acceleration of the structure. Numerical simulations of the DVTLD-controlled structure agreed very well in phase with experimental results but somewhat overestimated the amplitude of the structural response.


Civil, Architectural and Environmental Engineering

Keywords and Phrases

Density-Variable Tuned Liquid Damper; A-Density; Controlled Structures; Earthquake Excitation; Far-Field Ground Motion; Floor Accelerations; Frame Structure; In-Phase; Numerical Simulation; Seismic Effectiveness; Seismic Response Control; Semi-Analytical Model; Shake Table Tests; Sloping Bottom; Structural Response; Tuned Liquid Dampers; Variable Control Systems; Computer Simulation; Damping; Robust Control; Robustness (Control Systems); Seismic Response

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Article - Journal

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Publication Date

01 Jan 2010