Experimental Validation of Viscoelastic Coupling Dampers for Enhanced Dynamic Performance of High-Rise Buildings

Montgomery, Michael; Christopoulos, Constantin

doi:10.1061/(asce)st.1943-541x.0001092

Cited by 68 publications

(46 citation statements)

References 5 publications

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“…The VEP damper consists of a Kelvin VE element having stiffness K ve and loss factor η ve , connected in series with an EP fuse with stiffness K b and activation load V d . The Kelvin model is a reasonable simplification of the actual VE behaviour, which is usually frequency and temperature dependent . The same figure also shows the small amplitude (stage 1), medium amplitude (stage 2) and large amplitude (stage 3) VEP damper response and overall VEP system response (including the contribution of the frame structure).…”

Section: Simplified Sdof Vep System Model and Basic Mechanical Assumpmentioning

confidence: 82%

“…Taylor Devices: http://taylordevices.com/dampers-seismic-protection.html) contain mechanisms for capping off the peak forces. Alternatively, VE devices with either friction or metallic fuses have been proposed to solve the same problem . An advantage of the viscoelastic–plastic, or VEP approach is that unlike fluid viscous dampers, it does not require a sophisticated orifice design or pre‐pressurization to achieve the desired properties at small displacements, and is arguably more durable as it does not require maintenance or special design to ensure the long term behaviour of critical elements such as the seals under life time pressure loads.…”

Section: Introductionmentioning

confidence: 99%

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Response prediction, experimental characterization and P‐spectra design of frames with viscoelastic–plastic dampers

Guo¹,

Christopoulos

2016

Earthq Engng Struct Dyn

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Summary Viscoelastic–plastic (VEP) dampers are hybrid passive damping devices that combine the advantages of viscoelastic and hysteretic damping. This paper first formulates a semi‐analytical procedure for predicting the peak response of nonlinear SDOF systems equipped with VEP dampers, which forms the basis for the generation of Performance Spectra that can then be used for direct performance assessment and optimization of VEP damped structures. This procedure is first verified against extensive nonlinear time‐history analyses based on a Kelvin viscoelastic model of the dampers, and then against a more advanced evolutionary model that is calibrated to characterization tests of VEP damper specimens built from commercially available viscoelastic damping devices, and an adjustable friction device. The results show that the proposed procedure is sufficiently accurate for predicting the response of VEP systems without iterative dynamic analysis for preliminary design purposes. A design method based on the Performance Spectra framework is then proposed for systems equipped with passive VEP dampers and is applied to enhance the seismic response of a six‐storey steel moment frame. The numerical simulation results on the damped structure confirm the use of the Performance Spectra as a convenient and accurate platform for the optimization of VEP systems, particularly during the initial design stage. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Simplified Sdof Vep System Model and Basic Mechanical Assumpmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Response prediction, experimental characterization and P‐spectra design of frames with viscoelastic–plastic dampers

Guo¹,

Christopoulos

2016

Earthq Engng Struct Dyn

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“…The experimental result validated that the VE material exhibited stable hysteretic behavior under the loading conditions that are expected in high-rise buildings under wind and earthquake loading. The full-scale test results also demonstrated the targeted viscoelastic response during the wind and lowlevel earthquake loading and the targeted viscoelastic-plastic response for extreme earthquakes, where the response is a combination of the VE response and the nonlinear behavior of the structural fuses [60].…”

Section: Coupling Beam Of Shear Wallmentioning

confidence: 96%

High Performance Damage‐Resistant Seismic Resistant Structural Systems for Sustainable and Resilient City: A Review

Wang

Hua

2018

Shock and Vibration

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This paper presents a review of high performance damage-resistant seismic resistant structural (DRSRS) systems for the sustainable and resilient city. Firstly, the motivation and the basic principle as well as methodology of the developing DRSRS system are briefly illustrated. Then, the structural detailing and the seismic behaviors of three types of existing DRSRS systems, namely, the replaceable structural element (RSE), rocking seismic resisting structural (RSRS) system, and self-centering seismic resisting structural (SCSRS) system, are summarized in detail. The theoretical and extensive experimental study results indicated that the three existing types of DRSRS system can minimize the postdamage after loading. Types of energy dissipation devices and dampers, as well as fuse sections, can largely enhance the energy dissipation capacity of the proposed structural system. Many numerical and finite element models have been proposed to analyze the dynamic and static cyclic responses of them. The residual deformation after the dynamic response is smaller compared to that following the cyclic response. Then, the current research challenges of DRSRS system are illustrated, and the new research highlights that emerged in recent years are stated. Finally, the conclusions of this paper are summarized; furthermore, the recommendations for the future studies are pointed out at the end of the paper.

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“…Over the duration of the wind storm, the VE material temperature rises because of the VE material self‐heating effects. In experimental studies on typical damper configurations , when the VE material strain was limited to 100% during SLS loads, the VE temperature was found to increase by 4°C during the strong loading portion of the storm. During the ULS loading, when the VE material strain was limited to 135%, the VE material temperature was found to increase by 6°C during the strong loading portion of the storm.…”

Section: Behavior Of Viscoelastic Materials and Modeling Of Viscoelastmentioning

confidence: 99%

Viscoelastic coupling dampers (VCDs) for enhanced wind and seismic performance of high‐rise buildings

Christopoulos

Montgomery²

2013

Earthq Engng Struct Dyn

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127

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SUMMARY As high‐rise buildings are built taller and more slender, their dynamic behavior becomes an increasingly critical design consideration. Wind‐induced vibrations cause an increase in the lateral wind design loads, but more importantly, they can be perceived by building occupants, creating levels of discomfort ranging from minor annoyance to severe motion sickness. The current techniques to address wind vibration perception include stiffening the lateral load‐resisting system, adding mass to the building, reducing the number of stories, or incorporating a vibration absorber at the top of the building; each solution has significant economic consequences for builders. Significant distributed damage is also expected in tall buildings under severe seismic loading, as a result of the ductile seismic design philosophy that is widely used for such structures. In this paper, the viscoelastic coupling damper (VCD) that was developed at the University of Toronto to increase the level of inherent damping of tall coupled shear wall buildings to control wind‐induced and earthquake‐induced dynamic vibrations is introduced. Damping is provided by incorporating VCDs in lieu of coupling beams in common structural configurations and therefore does not occupy any valuable architectural space, while mitigating building tenant vibration perception problems and reducing both the wind and earthquake responses of the structure. This paper provides an overview of this newly proposed system, its development, and its performance benefits as well as the overall seismic and wind design philosophy that it encompasses. Two tall building case studies incorporating VCDs are presented to demonstrate how the system results in more efficient designs. In the examples that are presented, the focus is on the wind and moderate earthquake responses that often govern the design of such tall slender structures while reference is made to other studies where the response of the system under severe seismic loading conditions is examined in more detail and where results from tests conducted on the viscoelastic material and the VCDs in full‐scale are presented. Copyright © 2013 John Wiley & Sons, Ltd.

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Experimental Validation of Viscoelastic Coupling Dampers for Enhanced Dynamic Performance of High-Rise Buildings

Cited by 68 publications

References 5 publications

Response prediction, experimental characterization and P‐spectra design of frames with viscoelastic–plastic dampers

Response prediction, experimental characterization and P‐spectra design of frames with viscoelastic–plastic dampers

High Performance Damage‐Resistant Seismic Resistant Structural Systems for Sustainable and Resilient City: A Review

Viscoelastic coupling dampers (VCDs) for enhanced wind and seismic performance of high‐rise buildings

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