Experimental verification of seismic vibration control using a semi‐active friction tuned mass damper

Lin, Guan-Bo; Lin, Chun-Liang; Lu, Lyan Ywan; Ho, Yu Bo

doi:10.1002/eqe.1162

Cited by 41 publications

(29 citation statements)

References 38 publications

(43 reference statements)

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“…Their variable control force is based on a variable normal force applied onto a sliding interface. Examples of variable friction devices in literature include electromagnetic‐,() electromechanical‐,() hydraulic‐,() piezoelectric‐,() pneumatic‐,() and magnetorheological‐based() technologies. The proposed device leverages the advantages of HPCS to create a cladding connection capable of mitigation performance over a wide range of frequencies, therefore making it an excellent candidate for multihazard applications.…”

Section: Introductionmentioning

confidence: 99%

Characterization of a novel variable friction connection for semiactive cladding system

Gong

Cao

Laflamme

et al. 2018

Struct Control Health Monit

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Cladding systems are conventionally designed to serve architectural purposes and protect occupants from the environment. Some research has been conducted in altering the cladding system in order to provide additional protection against natural and man-made hazards. The vast majority of these solutions are passive energy dissipators, applicable to the mitigation of single types of hazards. In this paper, we propose a novel semiactive variable friction device that could act as a connector linking a cladding panel to the structural system. Because of its semiactive capabilities, the device, here termed variable friction cladding connection (VFCC), could be utilized to mitigate different hazards, either considered individually or combined, also known as multihazards. The VFCC consists of two sets of sliding friction plates, onto which a variable normal force can be applied through an actuated toggle system. A static model is derived to relate the device's Coulomb friction force to the actuator stroke. This model is integrated into a dynamic friction model to characterize the device's dynamic behavior. A prototype of the VFCC is constructed using 3D printing. The prototype is tested under harmonic excitations to identify the model parameters and characterized on a set of nonstationary excitations under different actuator stroke lengths. Results show good agreement between the model and experimental data, demonstrating that the device functions as-designed. KeywordsSemi-active damper, Variable friction, Cladding connection, Multi-hazard mitigation, High performance control systems, 3D printing Disciplines Dynamics and Dynamical Systems | Mechanics of Materials | Tribology CommentsThis is the pre-peer reviewed version of the following article: Gong, Yongqiang, Liang Cao, Simon Laflamme, Spencer Quiel, James Ricles, and Douglas Taylor. "Characterization of a novel variable friction connection for semiactive cladding system. " Structural Control and Health Monitoring 25, no. 6 (2018) AbstractCladding systems are conventionally designed to serve architectural purposes and protect occupants from the environment. Some research has been conducted in altering the cladding system in order to provide additional protection against natural and man-made hazards. The vast majority of these solutions are passive energy dissipators, applicable to the mitigation of single types of hazards. In this paper, we propose a novel semiactive variable friction device that could act as a connector linking a cladding panel to the structural system.Because of its semi-active capabilities, the device, here termed variable friction cladding connection (VFCC), could be utilized to mitigate different hazards, either considered individually or combined, also known as multi-hazards. The VFCC consists of two sets of sliding friction plates onto which a variable normal force can be applied through an actuated toggle system. A static model is derived to relate the device's Coulomb friction force to the actuator stroke. This model is integrated in...

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Section: Introductionmentioning

confidence: 99%

Characterization of a novel variable friction connection for semiactive cladding system

Gong

Cao

Laflamme

et al. 2018

Struct Control Health Monit

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“…Li et al [30] introduced the hybrid active TMD for structures under ground acceleration. Lin et al [31] presented the experimental verification of seismic vibration control using semi-active friction TMD. Nagarajaiah et al [32,33] introduced the short time Fourier transform algorithm for wind response control of buildings with variable stiffness TMD.…”

Section: Introductionmentioning

confidence: 99%

Study on Adaptive-Passive and Semi-Active Eddy Current Tuned Mass Damper with Variable Damping

et al. 2018

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Tuned mass damper (TMD) is a widely used vibration control device, consisting of a mass, some springs and damping elements. Viscous damper is mostly used as a damping element; however, it has many unsustainable problems, e.g., poor durability, sensitive to the change of temperature, difficult to adjust the damping, oil leakage etc. In this paper, a new sustainable adaptive-passive eddy current tuned mass damper (ECTMD) with variable damping, which is very easy to be further upgraded to a semi-active one, is proposed. Four important parameters, e.g., adsorption position of permanent magnets, thickness of the conductive plate, thickness of the extra steel plate and the air gap between permanent magnets and the conductive plate are investigated by a parametric study. Two new evaluation indexes are put forward to indicate the damping mechanism of the proposed device. The relationship between effective damping coefficient and air gap is fitted through a quadratic function. Then, the corresponding design method of the proposed adaptive-passive ECTMD is presented. At last, the previous adaptive-passive ECTMD is upgraded to a semi-active one, which can adjust its eddy current damping through adjusting its air gap in real-time, based on the linear-quadratic-Gaussian algorithm. The effectiveness of semi-active ECTMD is evaluated through harmonic excitations and human-induced excitations. The results show that the semi-active ECTMD with variable damping has a better vibration control effect than the optimized passive one.

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“…However, this control strategy is highly sensitive to the initial tuning properties and reduces in efficiency in the case of damage‐induced frequency changes or initial mistuning due to lack of enough knowledge toward the mechanical properties of the structure. In order to compensate for this problem, various active and semiactive strategies have been proposed …”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of phase‐controlled semiactive resettable TMD (PCRTMD) with the stiffness retuning ability under strong seismic motions

Amini

Tourani

Ghaderi

2018

Structural Design Tall Build

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Summary Tuned mass dampers (TMDs), despite being efficient because the structure has not experienced damage and properties degradation, lose efficiency when the mechanical properties of the structure changes and detuning effects occur. Semiactive TMDs have been shown superior to the traditional passive ones and more efficient and reliable than the active counterparts for the detuning problem. This study presents a novel semi active system that is able to respond efficiently and maintain such a performance even in the case of structural damage. This scheme is composed of a variable stiffness component, a resettable element, and a friction brake. The system dissipates energy using the resetting mechanism and is able to change stiffness when the tuned frequency of the structure changes due to structural damage. The friction device is responsible for maintaining the TMD in the optimal phase lag to the structure, that is, −90°, and thus keeping the TMD in the optimal performance. This strategy has been tested on a single‐degree‐of‐freedom frame, to understand the system behavior under harmonic excitation, as well as a 10‐story shear type frame under strong seismic motions. The proposed system has shown to be effective and competent comparing analysis results to active and passive TMDs.

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Experimental verification of seismic vibration control using a semi‐active friction tuned mass damper

Cited by 41 publications

References 38 publications

Characterization of a novel variable friction connection for semiactive cladding system

Characterization of a novel variable friction connection for semiactive cladding system

Study on Adaptive-Passive and Semi-Active Eddy Current Tuned Mass Damper with Variable Damping

Performance evaluation of phase‐controlled semiactive resettable TMD (PCRTMD) with the stiffness retuning ability under strong seismic motions

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