Seismic performance of structures connected by viscoelastic dampers

Kim, Jinkoo; Ryu, Jingook; Chung, Lan

doi:10.1016/j.engstruct.2005.05.014

Cited by 108 publications

(48 citation statements)

References 3 publications

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“…limited to the few ones discussed in this paper. Among these strategies, we mention the coupling of adjacent buildings by means of passive damping devices to reduce the risk of pounding [50][51][52] and to improve the seismic performance of the two systems [53][54][55], the introduction of viscous dampers along the height of the building that produce desired levels of interstory drifts while reducing seismic forces [56,57], the interstory isolation by the use of seismic isolators at levels other than the base along the height of a building [58,59], and the interstory isolation implemented by converting masses already present on the structure into tuned masses according to a nonconventional TMD scheme [38,60]. Moreover, there are a range of supplemental dampers that do not have a viscous nature, for example, buckling restrained braces, yielding fuse systems, and the HF2V device based on the lead extrusion technology [61][62][63][64], to quote just a few.…”

Section: Advances In Civil Engineeringmentioning

confidence: 99%

Earthquake Protection of Existing Structures with Limited Seismic Joint: Base Isolation with Supplemental Damping versus Rotational Inertia

Domenico

Ricciardi

2018

Advances in Civil Engineering

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Existing civil engineering structures having strategic importance, such as hospitals, fire stations, and power plants, often do not comply with seismic standards in force today, as they were designed and built based on past structural guidelines. On the other hand, due to their special importance, structural integrity of such buildings is of vital importance during and after earthquakes, which puts demands on strategies for their seismic protection. In this regard, seismic base isolation has been widely employed; however, the existing limited seismic joint between adjacent buildings may hamper this application because of the large displacements concentrated at the isolation floor. In this paper, we compare two possible remedies: the former is to provide supplemental damping in conventional base isolation systems and the latter consists in a combination of base isolation with supplemental rotational inertia. For the second strategy, a mechanical device, called inerter, is arranged in series with spring and dashpot elements to form the so-called tuned-mass-damper-inerter (TMDI) directly connected to an isolation floor. Several advantages of this second system as compared to the first one are outlined, especially with regard to the limitation of floor accelerations and interstory drifts, which may be an issue for nonstructural elements and equipment, in addition to disturbing occupants. Once the optimal design of the TMDI is established, possible implementation of this system into existing structures is discussed.

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Section: Advances In Civil Engineeringmentioning

confidence: 99%

Earthquake Protection of Existing Structures with Limited Seismic Joint: Base Isolation with Supplemental Damping versus Rotational Inertia

Domenico

Ricciardi

2018

Advances in Civil Engineering

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“…A variety of damping devices, such as viscous dampers [1][2][3][4], friction dampers [5][6][7], hysteretic dampers [8][9][10][11] and viscoelastic dampers [12][13][14][15][16][17], interconnecting adjacent buildings have been widely studied to prevent the pounding for engineering applications. Among these types of damping devices, the viscoelastic dampers can be used to dissipate energy at all deformation levels.…”

Section: Introductionmentioning

confidence: 99%

Optimal Vibration Control of Adjacent Building Structures Interconnected by Viscoelastic Dampers

Liu¹,

Wang²,

Chiu³

2017

JCEA

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Abstract:The objective of this paper is to investigate the dynamic characteristics of two adjacent building structures interconnected by viscoelastic dampers under seismic excitations. The computational procedure for an analytical model including the system model formulation, complex modal analysis and seismic time history analysis is presented for this purpose. A numerical example is also provided to illustrate the analytical model. The complex modal analysis is conducted to determine the optimal damping ratio, the optimal damper stiffness and the optimal damper damping of the viscoelastic dampers for each mode of the system. For the damper stiffness and damping with optimal values, the responses can be categorized into underdamped and critically damped vibrations. Furthermore, compared to the viscous dampers with only the energy dissipation mechanism, the viscoelastic dampers with both the energy dissipation and redistribution mechanisms are more effective for increasing the damping ratio of the system. The seismic time history analysis is conducted to assess the effectiveness of the viscoelastic dampers for vibration control. Based on the optimal damping ratio, the optimal damper stiffness, the optimal damper damping of the viscoelastic dampers for a certain mode of the system, and the viscoelastic dampers can be used to effectively suppress the root-mean-square responses as well as the peak responses of the two adjacent buildings.

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“…In their study adjacent structures had been connected in one direction by dampers. Kim et al (2006) studied the effect of installation of visco-elastic dampers (VED) in places like connecting building to the air bridge to reduce the seismic response of structures. In their research, parametric study was performed and firstly the system was examined with one degree of freedom connected fluid viscous damper.…”

Section: Introductionmentioning

confidence: 99%

Determining the Best Insertion Site of Fluid Viscous Dampers to Optimize and Reduce Incurredcosts in Adjacent Buildings

Solmazyaghobzadeh¹

2016

MAS

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In the past decade, researchers developed the idea of connecting buildings with intelligent activated, semi-active and inactivated damper systemsreduce adjacent buildings response to wind and earthquake. One of the most important damper devices in non-active control is fluid viscous damper.Fluid dampers due to viscous fluidsshow high resistance. High resistance of viscous fluidsagainst the flow is the basicfunctionof fluid viscous dampers. Deformation speed a fluid viscous damper is proportional to the acted forces. Therefore the aim of this paper is to determine the insertion site of fluid viscous dampersto optimize and reduce the consuming costs in adjacent buildings. For this purpose, four different models of connected adjacent buildings with common and different shear stiffness in the software SAP 2000 has been modeled. This study shows that it is not necessarytwo adjacent buildings connected by a damper on all floors, but the less damper in appropriate selected locations can help reduce the earthquake response. And by placing the fluid viscous dampers in selected certainfloors provides more useful structural system for reducing the effects of earthquakes.

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Seismic performance of structures connected by viscoelastic dampers

Cited by 108 publications

References 3 publications

Earthquake Protection of Existing Structures with Limited Seismic Joint: Base Isolation with Supplemental Damping versus Rotational Inertia

Earthquake Protection of Existing Structures with Limited Seismic Joint: Base Isolation with Supplemental Damping versus Rotational Inertia

Optimal Vibration Control of Adjacent Building Structures Interconnected by Viscoelastic Dampers

Determining the Best Insertion Site of Fluid Viscous Dampers to Optimize and Reduce Incurredcosts in Adjacent Buildings

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