Analytical and experimental investigations of Modified Tuned Liquid Dampers (MTLDs)

Chang, Yongjian; Noormohamed, Ali; Mercan, Oya

doi:10.1016/j.jsv.2018.04.039

Cited by 18 publications

(4 citation statements)

References 27 publications

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“…Refs. [33,34] proposed a modified TLD design that incorporates an appropriate torsional spring connection to the floor instead of a rigid connection. They suggested that this modified TLD design is more effective than conventional designs.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Sloped-Bed Tuned Liquid Dampers Using a Nonlinear Shallow Water Model

Khanpour,

Mohammadian,

Shirkhani

et al. 2024

Water

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This research aims to develop an efficient and accurate model for simulating tuned liquid dampers (TLDs) with sloped beds. The model, based on nonlinear shallow water equations, is enhanced by introducing new terms tailored to each specific case. It employs the central upwind method and Minmod limiter functions for flux and interface variable assessment, ensuring both high accuracy and reasonable computational cost. While acceleration, slope, and dissipation are treated as explicit sources, an implicit scheme is utilized for dispersion discretization to enhance the model’s stability, resulting in matrix equations. Time discretization uses the fourth-order Runge–Kutta scheme for precision. The performance of the model has been evaluated using several test cases including dam-breaks on flat and inclined beds and run-up and run-down simulations over parabolic beds, which are relevant to sloshing in tanks with sloped beds. It accurately predicts phenomena such as asymmetric sloshing waves, especially in sloped beds, where pronounced waves occur. Dispersion and dissipation terms are crucial for capturing these effects and maintaining stable wave patterns. An initial perturbation method assesses the tank’s natural period and numerical diffusion. Furthermore, the model integrates with a single-degree-of-freedom (SDOF) system to create a TLD model, demonstrating enhanced damping effects with sloped beds.

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Section: Introductionmentioning

confidence: 99%

Simulation of Sloped-Bed Tuned Liquid Dampers Using a Nonlinear Shallow Water Model

Khanpour,

Mohammadian,

Shirkhani

et al. 2024

Water

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“…[ 29 ] A modified TLD connected by a rotational spring to the structure was proposed to enhance the liquid sloshing and wave breaking. [ 30,31 ] Tait and Deng [ 32 ] studied the performance of the TLDs with different tank geometry. Li et al [ 33 ] proposed a shallow cylindrical TLD to suppress the vibration of high rise buildings.…”

Section: Introductionmentioning

confidence: 99%

A tuned liquid mass damper implemented in a deep liquid storage tank for seismic vibration control of short period structures

Pandey

Mishra

Chakraborty

2022

Structural Design Tall Build

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Deep liquid storage tanks cannot be implemented as tuned liquid damper (TLD) as the depth ratios often exceed the limit (0.3) for nonlinear sloshing and wave breaking.This study exploits the impulsive liquid mass to implement a tuned liquid mass damper (TLMD) by flexibly attaching the tank to the structure. The flexible mounting allows tuning of vibration of the impulsive mass to short period structures. The small, suboptimally tuned sloshing mass may also have minor contribute in dissipation. The performance of the TLMD is demonstrated by simulation and shake table experiments. The simulation involves solution of the governing equations for the structure-TLMD system, in which the vibration of liquid is described by the Housner model.The optimal parameters for tuning are obtained through optimization. The dynamic response evaluation employs a suite of far field, recorded ground motions of varying hazard levels to demonstrate robustness. The simulation and the experiment results corroborate well. Comparative assessments with TMD and TLD with identical mass ratios show comparable efficiency. Given that the stored liquid is employed for the functional purpose (unlike the added mass in TMD), the proposed TLMD may be a preferred alternative to conventional tuned mass damper (TMD) or TLD.

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“…Zhu et al [ 25 ] performed HIL simulation for tuned liquid column damper (TLCD) under seismic loads, and it was extended for multiple TLCDs. [ 26 ] Chang et al [ 27 ] also carried out an HIL simulation for demonstrating the effectiveness of a proposed modified TLD utilizing a rotational spring system at the base. Yet, application to an actual building considering wind loads and the similitude between the full‐scale and the model‐scale has not been introduced in such studies.…”

Section: Introductionmentioning

confidence: 99%

Hybrid simulation of a tall building with a double‐decker tuned sloshing damper system under wind loads

Kwon

Kareem

2020

Structural Design Tall Build

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Summary This study presents an advanced experimental system, hardware‐in‐the‐loop (HIL), recently referred to as hybrid testing, to validate the effectiveness of a double‐decker tuned sloshing damper (TSD) system with screens applied to a recently constructed tall building. The HIL simulation facilitates a performance analysis of a combined structure‐damper system in which the nonlinear behavior of liquid motion in a TSD is physically modeled, whereas a building system under wind loads that behaves linearly is embedded virtually utilizing a computer model. The scaled model of the TSD is composed of a computer‐controlled system with a shaking table, sensors, and a real‐time communication link. The virtual building system on the computer communicates in real time with the hardware, that is, the physical model of TSD to evaluate on‐the‐fly the performance of a combined building‐TSD system. External excitation including random loading characteristics of winds, waves, or earthquakes can be implemented in HIL to observe the dynamics of the building‐damper system under a host of loading scenarios. An example of a recently completed tall reinforced concrete building with multiple TSDs placed side by side in double‐decker configuration under a suite of external loads and the proposed damping estimation procedure to evaluate the amount of auxiliary damping with TSD for ensuring the TSD design is presented. It examines the habitability of the building in winds and evaluates the effectiveness of the TSD system as well as the efficacy of the first HIL simulation for an actual tall building‐TSD system equipped with screens inside.

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Analytical and experimental investigations of Modified Tuned Liquid Dampers (MTLDs)

Cited by 18 publications

References 27 publications

Simulation of Sloped-Bed Tuned Liquid Dampers Using a Nonlinear Shallow Water Model

Simulation of Sloped-Bed Tuned Liquid Dampers Using a Nonlinear Shallow Water Model

A tuned liquid mass damper implemented in a deep liquid storage tank for seismic vibration control of short period structures

Hybrid simulation of a tall building with a double‐decker tuned sloshing damper system under wind loads

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