Evaluation of the performance of a sliding-type base isolation system with a NiTi shape memory alloy device considering temperature effects

Ozbulut, Osman E.; Hurlebaus, Stefan

doi:10.1016/j.engstruct.2009.09.010

Cited by 103 publications

(60 citation statements)

References 46 publications

(45 reference statements)

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“…The two most prominent properties of SMAs are the shape memory effect, which is the ability of the material to return to its original shape after heating, and superelastic effect, which is the ability of the material to recover its large inelastic deformations upon the removal of the load. A number of researchers have explored the potential application of superelastic SMAs in a seismic isolation system (Jalali et al 15 ; Ozbulut and Hurlebaus [16][17][18][19] ; Bhuiyan and Alam 20 ; Gur et al 21 ). Attanasi et al 22 conducted an analytical study to investigate the feasibility of isolation systems with SMAs.…”

Section: Introductionmentioning

confidence: 98%

Design of isolated buildings with S-FBI system subjected to near-fault earthquakes using NSGA-II algorithm

Ozbulut

Silwal

2014

SPIE Proceedings

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This study investigates the optimum design parameters of a superelastic friction base isolator (S-FBI) system through a multi-objective genetic algorithm and performance-based evaluation approach. The S-FBI system consists of a flat steel-PTFE sliding bearing and a superelastic NiTi shape memory alloy (SMA) device. Sliding bearing limits the transfer of shear across the isolation interface and provides damping from sliding friction. SMA device provides restoring force capability to the isolation system together with additional damping characteristics. A three-story building is modeled with S-FBI isolation system. Multiple-objective numerical optimization that simultaneously minimizes isolation-level displacements and superstructure response is carried out with a genetic algorithm (GA) in order to optimize S-FBI system. Nonlinear time history analyses of the building with S-FBI system are performed. A set of 20 near-field ground motion records are used in numerical simulations. Results show that S-FBI system successfully control response of the buildings against near-fault earthquakes without sacrificing in isolation efficacy and producing large isolation-level deformations.

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Section: Introductionmentioning

confidence: 98%

Design of isolated buildings with S-FBI system subjected to near-fault earthquakes using NSGA-II algorithm

Ozbulut

Silwal

2014

SPIE Proceedings

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“…A number of the past studies has presented a review of the SMA properties and the applications of SMA technology in civil engineering [14,15,17]. Researchers are essaying to develop the seismic implementations of SMA materials in bridges as both base isolation systems [18] and passive seismic control devices [19]. Moreover, there have been several studies aimed at seismic hazard mitigation of buildings.…”

Section: Introductionmentioning

confidence: 99%

Seismic response of steel braced frames with shape memory alloy braces

Asgarian

Moradi

2011

Journal of Constructional Steel Research

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“…The two most prominent properties of SMAs are the shape memory effect, which is the ability of the material to return to its original shape after heating, and superelastic effect, which is the ability of the material to recover its large inelastic deformations upon the removal of the load. A number of researchers have explored the potential application of superelastic SMAs in a seismic isolation system (Jalali et al, 2011;Ozbulut and Hurlebaus, 2010a, 2011a, 2011b, 2012Rahman Bhuiyan, A., and Alam, 2013;Gur et al, 2013) . Attanasi et al (2009) conducted an analytical study to investigate the feasibility of isolation systems with SMAs.…”

Section: Introductionmentioning

confidence: 99%

Performance of Isolated Buildings with Superelastic-Friction Base Isolators under High Seismic Hazards

Ozbulut¹,

Silwal²

2014

Structures Congress 2014

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The seismic performance of a three-story building isolated with superelasticfriction base isolator (S-FBI) systems is evaluated relative to ground motion intensity associated with a risk level of 2% probability of exceedance in 50 years. The S-FBI system consists of a flat steel-PTFE sliding bearing and superelastic shape memory alloy (SMA) elements. An analytical model of the isolated building with the S-FBI system is developed to determine the response of the structure subjected to a seismic event. Seismic response of the non-isolated building is also evaluated for comparison purposes. Nonlinear response history analyses are conducted under a suite of 22 ground motion records. Peak interstory drift ratio, peak isolator displacement and residual isolator displacement are selected as the primary response quantities. Performance objectives based on the story drift ratios are defined. The effects of mechanical properties of the S-FBI system on the performance of the isolated buildings are examined.

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Evaluation of the performance of a sliding-type base isolation system with a NiTi shape memory alloy device considering temperature effects

Cited by 103 publications

References 46 publications

Design of isolated buildings with S-FBI system subjected to near-fault earthquakes using NSGA-II algorithm

Design of isolated buildings with S-FBI system subjected to near-fault earthquakes using NSGA-II algorithm

Seismic response of steel braced frames with shape memory alloy braces

Performance of Isolated Buildings with Superelastic-Friction Base Isolators under High Seismic Hazards

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