Application of shape memory alloy dampers in the seismic control of cable-stayed bridges

Sharabash, Alaa M.; Andrawes, Bassem

doi:10.1016/j.engstruct.2008.11.007

Cited by 137 publications

(69 citation statements)

References 31 publications

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“…Sharabash and Andrawes developed a super elastic shape memory alloy device (SMA). The experiments showed that the stroke of this device could reach 80 mm and the performance of energy dissipation was stable [30]. SMA was applied to the three long-span bridge model; it was shown that the damper could improve the seismic performance of the bridge.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Performance and Design Method of Improved Lead Shear Damper with Long Stroke

Wang

Yan

2018

Shock and Vibration

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The paper presents experimental study on an improved plate lead shear damper with long stroke (ILSD-LS) which is developed to meet the engineering requirements for high-rise structures with long periods subjected to the long-period earthquakes. Finite element analysis is also carried out to investigate the proposed damper. Based on the ideal rigid-plastic constitutive law of lead, a mechanical model of the ILSD-LS is established. Compared with ordinary dampers, ILSD-LS has better damping force, energy dissipation capacity, and stability according to the results of simulation and experiments. The method of calculating damping force is reasonable and accurate. In order to verify the damping effect of ILSD-LS for the structures with long periods under long-period ground motions, the nonlinear time history analysis of a typical high-rise structure with ILSD-LS is carried out. The numerical results indicate that the seismic responses of the high-rise structure with ILSD-LS are significantly reduced when subjected to long-period ground motion.

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Section: Introductionmentioning

confidence: 99%

Mechanical Performance and Design Method of Improved Lead Shear Damper with Long Stroke

Wang

Yan

2018

Shock and Vibration

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“…The nonlinear dynamic responses of cable-stayed bridges [6][7][8], including cable sag, geometry change of the whole bridge, soil-structure interaction, etc., were widely investigated due to the geometric and dynamic properties of these bridges. Passive control, as an effective seismic mitigation strategy, has been frequently used for seismic isolation of cable-stayed bridges in recent years [4,[9][10][11][12][13]. The isolation systems can be approximately divided into four types: isolation bearings, cable restrainers, dampers, and innovative devices.…”

Section: Introductionmentioning

confidence: 99%

Seismic Responses of a Cable-Stayed Bridge with Consideration of Uniform Temperature Load

et al. 2016

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Abstract:The effects of temperature load on the dynamic responses of cable-stayed bridges have attracted the attention of researchers in recent years. However, these investigations mainly focus on the influence of temperature on the dynamic characteristics of structures, such as vibration mode and frequency. This paper discusses the effects of uniform temperature changes on the seismic responses of a cable-stayed bridge. A three dimensional finite element model of a cable-stayed bridge using OpenSees is established for nonlinear time history analysis, and uniform temperature load is applied to the prototype bridge before the conducting of seismic excitation. Three ground motion records are selected from the PEER strong motion database based on the design spectrum. Case studies are then performed considering the varying temperature and the connections between the deck and pylons of the bridge. The result shows that the seismic responses of the bridge are significantly increased with the consideration of temperature load. Meanwhile, the types between the deck and pylon also have notable impacts on the seismic responses of the bridge with and without temperature changes. This research could provide a reference for designers during the design phase of cable-stayed brides.

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“…Particularly, in the last two decades, applications of SMAs in civil engineering have increased year by year; these applications include seismic isolation (Dolce et al, 2000;Sharabash & Andrawes, 2010;Ozbulut & Hurlebaus, 2010;Choi et al, 2005) or retrofit devices (DesRoches & Delemont, 2002), energy dissipation devices (Yang et al, 2010), devices for the prestressing of concrete (Sawaguchi et al, 2006;Maji & Negret, 1998), and smart cement composites (Krstulovic-Opara & Naaman, 2000;Shajil et al, 2013). SMAs show unique properties of shape memory effect (SME) and superelasticity (SE) (Janke et al, 2005); both are useful characteristics for buildings and civil structures.…”

Section: Introductionmentioning

confidence: 99%

New SMA Short Fibers for Cement Composites Manufactured by Cold Drawing

Choi¹,

Kim²,

Jeon³

et al. 2016

JMSR

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This study suggests new shape memory alloy reinforcing fibers manufactured by cold drawing method. This study prepares NiTi shape memory alloy (SMA) wires with diameter of 1.0 mm. Then, the wires are elongated by cold drawing and, thus, the diameters are reduced to 0.93 or 0.965 mm, respectively. This procedure introduces prestrain into the wires. When elongated SMA wires are heated, the shape memory effect is activated; this process recovers the deformed length as well as the reduced diameter due to Poisson's effect. Cold drawn wires with diameters of 0.93 and 0.965 mm recover diameters of 0.018 and 0.024 mm, respectively, with heating. The bulging of the SMA fiber in the radial direction inside cement composites induces confining pressure around the fiber and increases bond strength. When an SMA fiber is heated at the both ends, the heated parts bulge and the fiber shape looks like a dog-bone. Such a dog-bone shaped fiber can provide a geometrical anchoring action that also increases the bond resistance of the fiber. This study conducts pullout tests of SMA fibers to understand their pullout behavior and assess bond stress. The heated fibers and dog-bone shaped fibers increase pullout force compared to those of as-received and cold-drawn fibers. When dog-bone shaped fibers are heated, they show twice the pullout force of dog-bone shaped fibers without heating because geometric anchoring action as well as additional frictional resistance due to confining pressure are activated.

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Application of shape memory alloy dampers in the seismic control of cable-stayed bridges

Cited by 137 publications

References 31 publications

Mechanical Performance and Design Method of Improved Lead Shear Damper with Long Stroke

Mechanical Performance and Design Method of Improved Lead Shear Damper with Long Stroke

Seismic Responses of a Cable-Stayed Bridge with Consideration of Uniform Temperature Load

New SMA Short Fibers for Cement Composites Manufactured by Cold Drawing

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