Controlled Semiactive Hydraulic Vibration Absorber for Bridges

Patten, William; Sack, Ronald L.; Qi-wei, HE

doi:10.1061/(asce)0733-9445(1996)122:2(187)

Cited by 74 publications

(29 citation statements)

References 17 publications

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“…We believe that the application of these systems to civil engineering structures was first reported by Hrovat et al [1983]. Several devices that can deliver changeable variable damping such as variable orifice dampers [Symans and Constantinou 1997;Kurata et al 1999;Kurata et al 2000] and hydraulics dampers [Kawashima et al 1992;Patten et al 1993;Sack et al 1994;Patten et al 1996] …”

Section: Introductionmentioning

confidence: 99%

A new variable damping semiactive device for seismic response reduction of civil structures

Cundumi

Suárez

2007

JOMMS

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A semiactive mechanism, called a VDSA (variable damping semiactive device), is proposed to reduce the seismic response of structures. It is composed of two fixed-orifice viscous fluid dampers installed in the form of a V whose top ends are attached to a floor and their lower ends to a collar that moves along a vertical rod. By varying the VDSA position one obtains an optimal instantaneous damping added to the structure. The position of the moving end is calculated with an algorithm based on a variation of the instantaneous optimal control theory which includes a generalized LQR (linear quadratic regulator) scheme. This modified algorithm, referred to as Qv, is based on the minimization of a performance index J quadratic in the state vector, the control force vector, and an absolute velocity vector. Two variants of the algorithm are used to present numerical simulations of the controlled seismic response of a single and a MDOF (multi-degree-of-freedom) structure.

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Section: Introductionmentioning

confidence: 99%

A new variable damping semiactive device for seismic response reduction of civil structures

Cundumi

Suárez

2007

JOMMS

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“…Semi-active control systems appear to combine the best features of both passive and active control systems and to o er the greatest likelihood for near-term acceptance of control technology as a viable means of protecting civil structures against loads induced by natural hazard events [2]. Various semi-active control approaches have been proposed, such as active variable sti ness (AVS) systems [3], variable dampers [4][5][6], continuously variable sti ness system [7], magneto-rheological uid dampers [8], resetting semi-active sti ness dampers [9], and others (see, for example, Reference [1]). …”

Section: Introductionmentioning

confidence: 99%

Statistical performance analysis of seismic‐excited structures with active interaction control

Zhang¹,

Iwan²

2003

Earthq Engng Struct Dyn

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SUMMARYThis paper presents a statistical performance analysis of a semi-active structural control system for suppressing the vibration response of building structures during strong seismic events. The proposed semi-active mass damper device consists of a high-frequency mass damper with large sti ness, and an actively controlled interaction element that connects the mass damper to the structure. Through actively modulating the operating states of the interaction elements according to pre-speciÿed control logic, vibrational energy in the structure is dissipated in the mass damper device and the vibration of the structure is thus suppressed. The control logic, categorized under active interaction control, is deÿned directly in physical space by minimizing the inter-storey drift of the structure to the maximum extent. This semi-active structural control approach has been shown to be e ective in reducing the vibration response of building structures due to speciÿc earthquake ground motions. To further evaluate the control performance, a Monte Carlo simulation of the seismic response of a three-storey steel-framed building model equipped with the proposed semi-active mass damper device is performed based on a large ensemble of artiÿcially generated earthquake ground motions. A procedure for generating codecompatible artiÿcial earthquake accelerograms is also brie y described. The results obtained clearly demonstrate the e ectiveness of the proposed semi-active mass damper device in controlling vibrations of building structures during large earthquakes.

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“…In this work the system parameters was assumed to be an arbitrary function of time and a least-squares method was employed to estimate the system parameters at every time instant based on input data and the corresponding response measurement. In a di!erent context, time-dependent parameters were also used to model the dynamics of a semiactive bridge vibration absorber [5]. This time dependency of the parameter matrices was associated with the dynamic coupling between the vehicle suspension and the bridge structure.…”

Section: Introductionmentioning

confidence: 99%

A Wavelet-Based Approach for the Identification of Linear Time-Varying Dynamical Systems

Ghanem

Romeo

2000

Journal of Sound and Vibration

154

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Controlled Semiactive Hydraulic Vibration Absorber for Bridges

Cited by 74 publications

References 17 publications

A new variable damping semiactive device for seismic response reduction of civil structures

A new variable damping semiactive device for seismic response reduction of civil structures

Statistical performance analysis of seismic‐excited structures with active interaction control

A Wavelet-Based Approach for the Identification of Linear Time-Varying Dynamical Systems

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