Optimum design of linear tuned mass dampers for structures with nonlinear behaviour

Sgobba, Sara; Marano, Giuseppe Carlo

doi:10.1016/j.ymssp.2010.01.009

Cited by 92 publications

(62 citation statements)

References 31 publications

(47 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Previous studies demonstrated that the performance of the TMD when applied to systems with nonlinear behavior may be significantly different (worse) in comparison with the case of a linear primary structure . This may be ascribed to the detuning effects caused by the stiffness change in the nonlinear range, whereas the TMD is usually designed and optimized for the initial elastic stiffness of the structure (related to the tuning frequency).…”

Section: Introductionmentioning

confidence: 99%

Optimal design and seismic performance of tuned mass damper inerter (TMDI) for structures with nonlinear base isolation systems

Domenico

Ricciardi

2018

Earthq Engng Struct Dyn

194

View full text Add to dashboard Cite

Summary The tuned mass damper inerter (TMDI) couples the classical tuned mass damper (TMD) with an inerter, a mechanical device whose generated force is proportional to the relative acceleration between its terminals, thus providing beneficial mass‐amplification effects. This paper deals with a dynamic layout in which the TMDI is installed below the isolation floor of base‐isolated structures in order to enhance the earthquake resilience and reduce the displacement demand. Unlike most of the literature studies that assumed a linearized behavior of the isolators, the aim of this paper is to investigate the effectiveness of the TMDI while accounting for the nonlinearity of the isolators. Two nonlinear constitutive behaviors are considered, a Coulomb friction model and a Bouc‐Wen hysteretic model, representative of friction pendulum and of lead‐rubber‐bearing isolators, respectively. Optimal design is based on the stochastic dynamic analysis of the system, by modeling the base acceleration as a Kanai‐Tajimi filtered stationary random process and resorting to the stochastic linearization technique to handle the nonlinear terms. Different tuning criteria based on displacement, acceleration, and energy‐based performance indices are defined, and their implications in a design process are discussed. It is proven that the improved robustness of the TMDI reduces its performance sensitivity to the tuning frequency and to the earthquake frequency content, which are well‐known shortcomings of TMD‐like systems. This important feature makes the TMDI particularly suitable for nonlinear base‐isolated structures that are affected by unavoidable uncertainties in the isolators' properties and that may experience changes of isolators effective stiffness depending on the excitation level.

show abstract

Section: Introductionmentioning

confidence: 99%

Optimal design and seismic performance of tuned mass damper inerter (TMDI) for structures with nonlinear base isolation systems

Domenico

Ricciardi

2018

Earthq Engng Struct Dyn

194

View full text Add to dashboard Cite

show abstract

“…Because a TMD is tuned to a specific frequency, it can only effectively suppress structural responses in a narrow frequency band and is less effective for excitations outside this frequency range. Furthermore, if structural elements undergo inelastic actions during an earthquake, the primary system's frequency may shift, degrading the TMD's expected performance . Detuning may also occur due to inevitable errors and uncertainties in estimating the fundamental frequency of a building even if the system vibrates in the elastic range.…”

Section: Introductionmentioning

confidence: 99%

Robust design of a multi-floor isolation system

Anajafi

Medina

2018

Struct Control Health Monit

View full text Add to dashboard Cite

Summary A multi‐floor isolation (MFI) technique can provide a building with inherent dynamic vibration suppressors through decoupling different portions of floors masses from the superstructure. This paper evaluates the seismic effectiveness and robustness of the MFI technique using a test‐bed 20‐story building. First, a parametric study approach is utilized to optimize MFI configurations with different isolated mass ratios (IMRs) and different number of isolated floor subsystems (IFSs). The response quantity to be optimized is the sum of root‐mean‐square interstory drift responses of the superstructure under a stochastic excitation. The sensitivity of the seismic performance of the optimally designed MFI configurations with respect to uncertainties in the properties of the superstructure, IFSs, and the ground excitation is evaluated. Simulation results illustrate that with the presence of these uncertainties, the effectiveness of the optimally designed MFI configurations with low and high IMRs (e.g., 5% and 90%) is significantly impaired, whereas configurations with intermediate IMRs (e.g., 50%) exhibit a relatively stable performance. Evaluation of the optimal placement of IFSs along the building height, when the number of IFSs is limited, reveals that placing the IFSs at top stories can lead to a near‐optimal system in terms of the spatial distribution of IFSs. A genetic algorithm is used to design a robust system for a selected configuration with top 10 IFSs and an IMR of 50%. The robust design is performed via minimizing the maximum deviation with respect to the design root‐mean‐square interstory drift response when the design parameters vary within a given uncertainty range.

show abstract

“…Further, it was recommended that the TMDs should not be used for the structures with weak upper stories. Sgobba and Marano [47] investigated the optimum design of the TMDs for the seismic protection of inelastic structures. They reported that the application of the TMD system reduces the amount of the hysteretic dissipated energy.…”

Section: Effectiveness Of Tmds Installed On a Cracked Chimneymentioning

confidence: 99%

Effectiveness of distributed tuned mass dampers for multi-mode control of chimney under earthquakes

Elias

Matsagar

Datta

2016

Engineering Structures

View full text Add to dashboard Cite

Optimum design of linear tuned mass dampers for structures with nonlinear behaviour

Cited by 92 publications

References 31 publications

Optimal design and seismic performance of tuned mass damper inerter (TMDI) for structures with nonlinear base isolation systems

Optimal design and seismic performance of tuned mass damper inerter (TMDI) for structures with nonlinear base isolation systems

Robust design of a multi-floor isolation system

Effectiveness of distributed tuned mass dampers for multi-mode control of chimney under earthquakes

Contact Info

Product

Resources

About