Development of steel dampers for bridges to allow large displacement through a vertical free mechanism

Pan, Peng; Yan, Hong; Wang, Tao; Xu, Peizhen; Xie, Qiang

doi:10.1007/s11803-014-0249-6

Cited by 15 publications

(7 citation statements)

References 4 publications

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“…Andrawes and DesRoches (2007) revealed that metallic dampers were capable of dissipating significantly more energy than other devices. Vasseghi (2011) and Pan, Yan, Wang, Xu, and Xie (2014) proposed metallic yielding devices to improve the seismic performance and prevent the pounding between the superstructures and concrete shear keys under transverse seismic excitation. The energy dissipating shear keys transfer a fraction of the seismic load to the substructures and dissipate the seismic energy through inelastic deformations.…”

Section: Metallic Dampersmentioning

confidence: 99%

Devices for protecting bridge superstructure from pounding and unseating damages: an overview

Shrestha

Hao

2016

Structure and Infrastructure Engineering

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Previous earthquakes have highlighted the seismic vulnerability of bridges due to excessive movements at expansion joints. This movement could lead to the catastrophic unseating failure if the provided seat width is inadequate. Moreover, seismic pounding is inevitable during a strong earthquake due to the limited gap size normally provided at the expansion joints. Various types of restrainers, dampers and other devices have been proposed to limit the joint movement or to accommodate the joint movement so that the damages caused by the excessive relative displacements could be mitigated. To select and design appropriate devices to mitigate the relative displacement induced damages on bridge structures during earthquake shaking, it is important that results from the previous studies are well understood. This paper presents an overview on the various pounding and unseating mitigation devices that have been proposed by various researchers. Based on an extensive review of up-to-date literatures, the merits and limitations of these devices are discussed.

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Section: Metallic Dampersmentioning

confidence: 99%

Devices for protecting bridge superstructure from pounding and unseating damages: an overview

Shrestha

Hao

2016

Structure and Infrastructure Engineering

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“…During the earthquake, the YSD starts to deform and dissipate seismic energy inelastically, thus protecting the tower columns and piers. Oh et al [42] and Domaneschi et al [7] performed the cyclic tests of the YSD, showing that it has stable hysteretic behavior, and the hysteretic curve is assumed as the bilinear response ( Figure 6), regardless of the specific form [19][20][21][24][25][26]30,32]. Therefore, the YSD is simulated by Plastic Wen units in SAP2000, which are bilinear constitutive models.…”

Section: Fe Modelling Of the Cable-stayed Bridgementioning

confidence: 99%

“…There are four parameters in damper design, namely the yielding strength F y , yielding displacement ∆ y , the ratio of post-yielding stiffness to pre-yielding stiffness and ultimate deformation ∆ u , while the ultimate strength F u is not an independent parameter. Normally, the ∆ y is set to 10 mm and the ratio of post-yielding stiffness to pre-yielding stiffness is set as 0.6% (less than 5% depending on the different shapes of products), which can provide good hysteretic performance according to related studies [19][20][21][24][25][26]30,32]. Therefore, F y is the key parameter which needs to be determined in this bilinear model.…”

Section: Fe Modelling Of the Cable-stayed Bridgementioning

confidence: 99%

“…Generally, a YSD's specific form can be classified as E shape [26,27], C shape [28,29], X shape [30,31], triangle shape [19][20][21] and pipe shape [24,25] etc. Some new types of YSD have also been developed in recent years [22][23][24][25]32], and their effectiveness in reducing the seismic demands of several types of bridges has also been studied [19,21,26,30,31,33,34]. In particular, the application of YSDs in cable-stayed bridges are investigated [19][20][21]28,35], and one of them has also been verified through the shake table test [19,28].…”

Section: Introductionmentioning

confidence: 99%

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Practical Design Method of Yielding Steel Dampers in Concrete Cable-Stayed Bridges

Zeng

Cunyu

et al. 2019

Applied Sciences

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Restrained transversal tower/pier–girder connections of cable-stayed bridges may lead to high seismic demands for tower columns when subject to earthquake excitations; however, free transversal tower/pier–girder connections may cause large relative displacement. Using an energy dissipation system can effectively control the bending moment of tower columns and the relative tower/pier-girder displacement simultaneously, but repeated time history analyses are needed to determine reasonable design parameters, such as yield strength. In order to improve design efficiency, a practical design method is demanded. Therefore, the influence of yielding strength at different locations is studied by using comprehensive and parametric time history analyses at first. The results indicate that yielding steel dampers can significantly reduce the bending moment at tower columns and the relative pier–girder displacement due to the system switch mechanism during the vibration. Meanwhile, the yielding steel damper shows its general effect on reducing relative displacement between all piers/tower columns and the main girder as well, with only a localized effect on controlling seismic induced forces. Furthermore, a practical design method is proposed for engineering practices to determine key parameters of the yielding steel damper.

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“…Compared with other dampers, steel dampers offer significant advantages in terms of durability and economic efficiency [7]. However, most of steel dampers, such as X-shaped ADAS, HADAS device [8][9], buckling restrained brace [10] and so on, were developed for building structures, which may not be able to satisfy the large deformation demands in bridge engineering [11].…”

Section: Introductionmentioning

confidence: 99%

Research on Hysteretic Behaviors of a Saparated Shock Absorber Applied in Railway Bridge

Li¹,

Gao²,

Sun³

et al. 2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Development of steel dampers for bridges to allow large displacement through a vertical free mechanism

Cited by 15 publications

References 4 publications

Devices for protecting bridge superstructure from pounding and unseating damages: an overview

Devices for protecting bridge superstructure from pounding and unseating damages: an overview

Practical Design Method of Yielding Steel Dampers in Concrete Cable-Stayed Bridges

Research on Hysteretic Behaviors of a Saparated Shock Absorber Applied in Railway Bridge

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