Semi‐Active versus Passive or Active Tuned Mass Dampers for Structural Control

Hrovat, D.; Barak, Pinhas; Rabins, Michael J.

doi:10.1061/(asce)0733-9399(1983)109:3(691)

Cited by 252 publications

(108 citation statements)

References 3 publications

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“…Within the field of structural engineering, the first application of semi-active structural control appears to have been proposed in the early 1980s 10 aiming at the response control of tall buildings subjected to environmental actions (i.e. wind loads).…”

Section: Application Of Semi-active Control and Related Techniques Tomentioning

confidence: 99%

Semi-Active Control Systems in Bridge Engineering: A Review of the Current State of Practice

Gkatzogias

Kappos

2016

Structural Engineering International

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This is the accepted version of the paper.This version of the publication may differ from the final published version. In view of the grave socioeconomic consequences of earthquake damage to bridge structures, along with their critical role in modern and older road and rail networks, this article attempts to identify and summarise the current trends in the use of semi-active control technology in bridge engineering, as an enhanced seismic response control solution, combining increased adaptability and reliability, compared to passive and active schemes. In this context, representative analytical and experimental studies, as well as some full-scale applications of semi-active control devices are first reviewed and a brief description of relevant benchmark studies is subsequently presented, with a view to serving as a point of reference for further research and development. A framework of performance-based control principles aiming at the aforementioned objectives is finally set forth. Permanent

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Section: Application Of Semi-active Control and Related Techniques Tomentioning

confidence: 99%

Semi-Active Control Systems in Bridge Engineering: A Review of the Current State of Practice

Gkatzogias

Kappos

2016

Structural Engineering International

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“…On the contrary, Semi-Active-Tuned-MassDampers (STMDs) work on the basis of indirectly applying control forces to the structural system i.e., by varying the stiffness or damping of an element attached to the structure, using methods such as controlling the fluid discharge through an orifice or varying the magnetic field around a ferrous-fluid piston (i.e., Magneto-Rheological (MR) dampers). STMDs have shown comparable performance to ATMDs (Nagarajaiah, 2009), but have also the benefit of guaranteed bounded-input bounded output stability, lower power demand (an order of magnitude less power than the ATMD) (Nagarajaiah and Varadarajan, 2005) and low cost of implementation (Hrovat et al, 1983;Franchek et al, 1995;Nader, 2002).These factors, establish STMDs as an attractive alternative for use in most civil engineering structural systems.…”

Section: Introductionmentioning

confidence: 98%

“…In this regards, because of the fact that no energy should be added directly to the system, the semiactive device will produce control forces only when required i.e., when the damper is to "consume" energy. Having already obtained an equivalent active force from Equation 2, the final step is to apply semiactive force saturation limits such that the semi-active control force, u sa (t), is calculated by (Hrovat et al, 1983) …”

Section: Modeling the Vd-stmd Controlled Systemmentioning

confidence: 99%

“…On the contrary, when damping variability is considered the change in the energy dissipation capacity of the system is typically exploited. If the damping variability is assumed to influence only the energy dissipation capacity of the system without influencing its frequency response, classical control methods for deriving the required control actions can be used (Hrovat et al, 1983). It is worth noting that although variable damping devices have the capacity of altering the system's damped natural frequency and re-tune the system, the damping ratio would need to be increased substantially to achieve this objective, something that might defeat the original purpose of using a TMD as a tuning device (Nagarajaiah, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Semi Active Tuned Mass Dampers of Buildings: A Simple Control Option

Demetriou¹,

Nikitas²,

Tsavdaridis

2015

American Journal of Engineering and Applied Sciences

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Abstract:The present study investigates the effectiveness of a ProportionalIntegral-Derivative (PID) controlled Variable Damping Semi-Active Tuned Mass Damper (VD-STMD) on reducing the vibration response of an earthquake excited multi-storey structure. The effectiveness of the controlled system is evaluated by comparing the structure's overall dynamic behavior against that of an equivalent similar structure equipped with a conventional optimally designed passive Tuned Mass Damper (TMD). The numerical simulations show that the structure equipped with the PID controlled VD-STMD has improved vibration attenuation metrics when compared to the one equipped with the optimal TMD. From the numerical simulations, it was also evident that when material degradation and structural damage is considered, the TMD becomes instantly de-tuned resulting in reduced vibration mitigation performance. On the contrary, the VD-STMD controlled system remains insensitive to the stiffness parametric variation, suggesting the suitability of such systems in structural applications sustaining damage or in general change.

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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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Semi‐Active versus Passive or Active Tuned Mass Dampers for Structural Control

Cited by 252 publications

References 3 publications

Semi-Active Control Systems in Bridge Engineering: A Review of the Current State of Practice

Semi-Active Control Systems in Bridge Engineering: A Review of the Current State of Practice

Semi Active Tuned Mass Dampers of Buildings: A Simple Control Option

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

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