Optimal seismic response control with dampers

Singh, M. P.; Moreschi, Luis M.

doi:10.1002/eqe.23

Cited by 137 publications

(76 citation statements)

References 24 publications

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“…The main limitation of this method is that this applies only to structures that fit the definitions given in Equation (10).…”

Section: Discussionmentioning

confidence: 99%

“…Over many years, research efforts have been aimed at reliable and cost-effective design practices. Optimal design methodologies for passive dampers based on a number of theories have been proposed for determining both damper sizes as in [7][8][9][10][11] and damper locations as in [12][13][14][15] among others. They commonly differ on how the optimisation problem is addressed and in which cost function and constraints the optimisation problem are subjected to.…”

Section: Introductionmentioning

confidence: 99%

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Supporting brace sizing in structures with added linear viscous fluid dampers: A filter design solution

Londoño

Wagg

Neild

2014

Earthq Engng Struct Dyn

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SUMMARYViscous fluid dampers have proved to be effective in suppressing unwanted vibrations in a range of engineering structures. When dampers are fitted in a structure, a brace is typically used to attach them to the main structure. The stiffness of this brace can significantly alter the effectiveness of the damper, and in structures with multiple dampers, this can be a complex scenario to model. In this paper, we demonstrate that the effects of the brace compliance on the damper performance can be modelled by way of a first-order filter. We use this result to formulate a procedure that calculates the stiffness required by the supporting brace to provide a specified effectiveness of the damping action. The proposed procedure assumes that viscous dampers have been sized in a previous design step based on any optimal methodology in which, as is usually the case, the presence of supporting braces and their dynamic effects were neglected. Firstly considering a one degree-of-freedom system, we show that the proposed method ensures a desired level of damper efficiency for all frequencies within a selected bandwidth. Then the analysis is extended to the case of multi-degree-of-freedom systems to show that the design criteria can be applied in a straightforward and successful manner to more complex structures.

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“…The main limitation of this method is that this applies only to structures that fit the definitions given in Equation (10).…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Supporting brace sizing in structures with added linear viscous fluid dampers: A filter design solution

Londoño

Wagg

Neild

2014

Earthq Engng Struct Dyn

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“…Hence, the use of FVDs seems natural for seismic retrofitting where both displacements and forces due to earthquakes are to be decreased. Indeed, optimal design of such dampers for the purpose of seismic retrofitting of frame structures received much attention (Zhang and Soong, 1992;Gluck et al, 1996;Takewaki, 1997;Singh and Moreschi, 2001;Lopez-Garcia and Soong, 2002;Dargush and Sant, 2005;Lavan and Levy, 2005, 2009Aydin et al, 2007;Lavan et al, 2008;Lavan and Dargush, 2009;Adachi et al, 2013;Aguirre et al, 2013;Kanno, 2013;Martínez et al, 2013;Sonmez et al, 2013;Gidaris and Taflanidis, 2014;Hatzigeorgiou and Pnevmatikos, 2014;Lavan and Amir, 2014;Lin et al, 2014;Lavan, 2015). To allow a quick examination of whether such devices are a good alternative, simple methodologies for initial design were proposed as well (FEMA 356, 2000;Palermo et al, 2013;Landi et al, 2014;Rama Raju et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Seismic Behavior and Design of Wall–EDD–Frame Systems

Lavan

Abecassis

2015

Front. Built Environ.

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Walls and frames have different deflection lines and, depending on the seismic mass they support, may often possess different natural periods. In many cases, wall-frame structures present an advantageous behavior. In these structures, the walls and the frames are rigidly connected. Nevertheless, if the walls and the frames were not rigidly connected, an opportunity for an efficient passive control strategy would arise: connecting the two systems by energy dissipation devices (EDDs) to result in wall-EDD-frame systems. This, depending on the parameters of the system, is expected to lead to an efficient energy dissipation mechanism. This paper studies the seismic behavior of wall-EDD-frame systems in the context of retrofitting existing frame structures. The controlling non-dimensional parameters of such systems are first identified. This is followed by a rigorous and extensive parametric study that reveals the pros and cons of the new system versus wall-frame systems. The effects of the controlling parameters on the behavior of the new system are analyzed and discussed. Finally, tools are given for initial design of such retrofitting schemes. These enable both choosing the most appropriate retrofitting alternative and selecting initial values for its parameters.

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“…Many of them primarily address the problem of distributing a given total added damping to achieve the best performance (minimize damage measures). Some of the works in this direction presented very efficient methods [4][5][6][7][8][9][10][11][12]. Note that in these works the total added damping is predetermined.…”

Section: Introductionmentioning

confidence: 99%

Seismic Loss Optimization of Frame Buildings Using Viscous Dampers

Puthanpurayil¹,

Lavan²,

Dhakal³

2015

Proceedings of the 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Abstract. The effectiveness of control strategies in achieving the objectives of a performancebased-design is well accepted in the earthquake engineering community. Consequently, various methods have been proposed for optimal design of dampers and their distribution along the building height. Most of the formulated methods concentrate mainly on reducing the responses with no explicit consideration of their long-term economic impact. In this study, an optimization problem is formulated for optimally distributing viscous dampers by minimizing the initial cost subject to a constraint on the total expected seismic loss. An intensity based assessment is used for the computation of the total expected loss. A generic Sequential LinearProgramming procedure is employed to solve the formulated optimization problem. Implementation scheme of the optimization procedure is outlined in detail. The efficacy of the proposed procedure is illustrated by applying it on a four story reinforced concrete frame. It has been shown that the optimization procedure results in the optimal quantity and distribution of viscous dampers along the height of the case study building.

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Optimal seismic response control with dampers

Cited by 137 publications

References 24 publications

Supporting brace sizing in structures with added linear viscous fluid dampers: A filter design solution

Supporting brace sizing in structures with added linear viscous fluid dampers: A filter design solution

Seismic Behavior and Design of Wall–EDD–Frame Systems

Seismic Loss Optimization of Frame Buildings Using Viscous Dampers

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