Residual Displacement Response Spectrum

Kawashima, Koichiro; MacRae, Gregory A.; Hoshikuma, Jun-ichi; Nagaya, Kazuhiro

doi:10.1061/(asce)0733-9445(1998)124:5(523)

Cited by 273 publications

(118 citation statements)

References 4 publications

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“…Kawashima et al (1998) report that the mean d rr is not dependent on the site class. Kurama (2001, 2003) compare mean μ r values identified for two ground motion ensembles.…”

Section: Ground Motion Characteristicsmentioning

confidence: 94%

“…A p value larger than zero implies hardening behavior and smaller than zero implies softening behavior. Several studies show that systems with higher p tend to sustain smaller residual displacements than those with lower post-yield stiffness (Riddell and Newmark, 1979;MacRae and Kawashima, 1997;Kawashima et al, 1998;Borzi et al, 2001;Pampanin et al, 2002b;Farrow and Kurama, 2003;Ruiz-Garcia and Miranda, 2005;Fu and Menun, 2006). The concept of "hysteresis center curve" is introduced by MacRae and Kawashima (1997) to explain the tendency of SDOF systems to yielding toward or away from zero displacement depending on their post-yield stiffness.…”

Section: Findings Related To the Median Value Of Residual Displacementsmentioning

confidence: 99%

“…Peak displacement ductility The influence of the peak displacement ductility demand on the S RDR is assessed by MacRae and Kawashima (1997) and Kawashima et al (1998). Their results do not show a significant dependence between the average S RDR and the peak displacement ductility.…”

Section: Hysteretic Behaviormentioning

confidence: 99%

“…The residual displacements of SDOF systems that experience specific levels of maximum displacement ductility (constant ductility approach) was investigated by Kawashima et al (1998). The coefficient of variation (COV) of the S RDR ratios for elastosplastic systems is found to be about 0.5.…”

Section: Findings Related To the Record-to-record Variability Of Resimentioning

confidence: 99%

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The use of post-earthquake residual displacements as a performance indicator in seismic assessment

Yazgan

Dazio

2011

Georisk: Assessment and Management of Risk for Engineered Syste

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PrefaceModern performance based earthquake engineering addresses design, evaluation, construction, maintenance and decommission of structures and requires that their performance during an earthquake can be predicted with a known degree of accuracy. In this framework the importance of residual displacements is twofold: On one hand they represent a significant source of damage affecting mainly the serviceability and the repairability of the structure. On the other hand, after an earthquake, residual displacements are often the only measurable indicator of the shaking occurred during the earthquake. In the framework of a pre-earthquake design or assessment process, the expected residual displacements need to be predicted; while during a post-earthquake assessment the actual residual displacements can be measured.Within his present doctoral dissertation, Mr. Yazgan developed and validated against experimental evidence a new and original methodology to improve the estimate of maximum deformations occurred during an earthquake taking into account both observable damage and measurable residual displacements. The methodology is based on the Bayesian probabilistic theory and, as a particular novelty, explicitly considers model error. To estimate model error Mr. Yazgan carried out a very extensive study on the numerical modelling of structures under earthquake, which also allowed the formulation of practical modelling recommendations. The quantification of model error is of course of fundamental importance also for any realistic pre-earthquake prediction of residual displacements.The thorough and comprehensive work presented by Mr. Yazgan allows a deep understanding of the challenges relevant to the use of residual displacements in the seismic performance assessment of structures and his developments represent a new effective way to achieve this important goal. Zurich, January 2010Dr. Alessandro Dazio SummarySafety assessment of damaged structures is a pivotal part of the post-earthquake recovery process. As a result of the deformation histories that have occurred during the damaging earthquake, the key structural properties of the columns, beams and walls that contribute to the seismic resistance change. The key structural properties include stiffness, strength and deformation capacity. An accurate estimation of the residual key structural properties is crucial in identifying vulnerability of the damaged structure.These residual structural properties are known to be strongly dependent on the maximum deformations that have occurred. A new post-earthquake assessment method is developed following this premise. After an earthquake, the maximum deformations experienced by a damaged structure can be estimated using the developed method.The essential idea behind the method is to probabilistically estimate the experienced maximum deformations based on the post-earthquake residual displacements and the visible structural damage. The major uncertainties related to the estimated maximum deformations are explicitly treated in the me...

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“…Kawashima et al (1998) report that the mean d rr is not dependent on the site class. Kurama (2001, 2003) compare mean μ r values identified for two ground motion ensembles.…”

Section: Ground Motion Characteristicsmentioning

confidence: 94%

Section: Findings Related To the Median Value Of Residual Displacementsmentioning

confidence: 99%

Section: Hysteretic Behaviormentioning

confidence: 99%

Section: Findings Related To the Record-to-record Variability Of Resimentioning

confidence: 99%

See 2 more Smart Citations

The use of post-earthquake residual displacements as a performance indicator in seismic assessment

Yazgan

Dazio

2011

Georisk: Assessment and Management of Risk for Engineered Syste

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“…즉, 복원능력이 증가하면 에 너지 소산능력이 감소한다 [1] . 탄성받침과 납-고무받침이 대 표적이며, 복원능력 증진을 위한 다양한 연구가 진행되었다 [2], [3] . 이 연구를 통한 깃발모양(flag-shaped) 거동 시스템 은 에너지 소산 능력 (energy dissipation)과 복원능력 (self-centering)을 동시에 보유하여 지진 및 진동의 피해 에 대응이 가능한 향상된 성능을 보유하고 있다 [4], [5] .…”

Section: 서 론 기존의 지진격리장치는 에너지 소산능력과 복원능력을 동시에 제공하는데 한계가 존재하며 에너지 소산 후 잔류변unclassified

A Smart Damper Using Magnetic Friction And Precompressed Rubber Springs

Choi¹,

Choi²

2016

Journal of Korean Society of Steel Construction

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-This study proposes a new technology for a smart damper with flag-shaped behavior using the combination of magnetic friction and rubber springs. The magnet provides friction and, thus, energy dissipation, and the rubber springs with precompression contribute to present self-centering capacity of the damper. To verify their performance, this study conducts dynamic tests of magnet frictional dampers and precompressed rubber springs. For the purpose, hexahedron Neodymium (NdFeB) magnets and polyurethane rubber cylinders are used. In the dynamic tests, loading frequency varies from 0.1 to 2.0 Hz. The magnets provide almost perfect rectangular behavior in force-deformation curve. The rubber springs are tested without or with precompression. The rubber springs show larger rigid force with increasing precompression. Lastly, this study discusses combination of rigid-elastic behavior and friction to generate 'flag-shaped' behavior for a smart damper and suggests how to combine the magnets and the rubber springs to obtain the flag-shaped behavior. Keywords -Magnetic Friction, Energy Dissipation, Precompressed Spring, Self-centering, Smart Damper

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Seismic performance of RC bridge piers in Japan: an evaluation after the 1995 Hyogo-ken nanbu earthquake

Kawashima

2000

Prog. Struct. Engng Mater.

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Residual Displacement Response Spectrum

Cited by 273 publications

References 4 publications

The use of post-earthquake residual displacements as a performance indicator in seismic assessment

The use of post-earthquake residual displacements as a performance indicator in seismic assessment

A Smart Damper Using Magnetic Friction And Precompressed Rubber Springs

Seismic performance of RC bridge piers in Japan: an evaluation after the 1995 Hyogo-ken nanbu earthquake

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