Robustness of SDOF elastoplastic structure subjected to double-impulse input under simultaneous uncertainties of yield deformation and stiffness

Kanno, Yoshihiro; Yasuda, Keisuke; Fujita, Kohei; Takewaki, Izuru

doi:10.1016/j.ijnonlinmec.2017.02.013

Cited by 4 publications

(4 citation statements)

References 22 publications

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“…2, the inequality equations can be described in terms of either ω or d y . From the observation of the variation of w c , Kanno et al (2017) showed the monotonicity of w c with respect to ω and the nonmonotonicity of w c with respect to d y . Figure 2 shows the variation of w c with respect to d y for a fixed ω.…”

Section: Maximum Elastoplastic Response Under Critical Double Impulsementioning

confidence: 99%

“…Kanno et al (2017) presented the robustness evaluation method using an SDOF model subjected to the critical double impulse. It was shown that, by using the closed-form solution of the maximum elastoplastic displacement derived by Kojima and Takewaki (2015), the robustness of the SDOF model exhibiting elastoplastic responses can be derived efficiently.…”

Section: Upper Bound Of Displacement Of Elastoplastic Base-isolated Hmentioning

confidence: 99%

“…In the theory of critical double impulse input, a closed-form solution of the critical response, i.e., the maximum elastoplastic displacement, to this critical double impulse input has been formulated for an undamped elastoplastic singledegree-of-freedom (SDOF) model. By using this closed-form solution of the critical elastoplastic response, Kanno and Takewaki (2016) and Kanno et al (2017) investigated the robustness evaluation method for elastoplastic structures under the simultaneous structural uncertainties. However, since the closed-form solution of the elastoplastic displacement proposed by Kojima and Takewaki (2015) is applicable only to SDOF models, the structural uncertainties are limited to two parameters, i.e., only the fundamental natural frequency and yield deformation.…”

Section: Introductionmentioning

confidence: 99%

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Robustness Evaluation of Elastoplastic Base-Isolated High-Rise Buildings Subjected to Critical Double Impulse

Fujita

Yasuda

Kanno

et al. 2017

Front. Built Environ.

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A new method of robustness evaluation is proposed for an elastoplastic base-isolated high-rise building considering simultaneous uncertainties of structural parameters. Since it is difficult to evaluate the robustness of elastoplastic structures due to heavy computational load on the time-history response analysis including elastoplastic response, a double impulse input is used to provide a closed-form solution of the critical response of a single-degree-of-freedom (SDOF) elastic-perfectly plastic structure under a nearfield ground motion. Introducing an equivalent elastoplastic SDOF model of a baseisolated high-rise building, the worst combination of uncertain structural parameters, i.e., the stiffness and yield deformation at the base-isolation story and the stiffness of the superstructure, can be derived which leads to the upper bound of the critical elastoplastic response. It is shown that, by using the derived upper bound of the critical response, the robustness function, a measure of the robustness, of elastoplastic structures can be evaluated efficiently. In numerical examples, the robustness of a 30-story base-isolated high-rise building is compared with those of other models with different yield deformations at the base-isolation story to find a preferable design with larger robustness.

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Section: Maximum Elastoplastic Response Under Critical Double Impulsementioning

confidence: 99%

Section: Upper Bound Of Displacement Of Elastoplastic Base-isolated Hmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Robustness Evaluation of Elastoplastic Base-Isolated High-Rise Buildings Subjected to Critical Double Impulse

Fujita

Yasuda

Kanno

et al. 2017

Front. Built Environ.

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“…In fact, it is absolutely required in Japan to consider the uncertainties of structural properties of isolators and dampers in the design of base-isolated buildings and passively controlled buildings. In such design procedure, the worst combination of structural properties of isolators and dampers plays a key role for reliable design (BenHaim, 2006;Elishakoff and Ohsaki, 2010;Takewaki et al, 2012;Fujita et al, 2017;Kanno et al, 2017). …”

Section: Introductionmentioning

confidence: 99%

A Simple Response Evaluation Method for Base-Isolation Building-Connection Hybrid Structural System under Long-Period and Long-Duration Ground Motion

Hayashi

Fujita

Tsuji

et al. 2018

Front. Built Environ.

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An innovative hybrid control building system of base-isolation and building-connection has been proposed in the previous study. This system has two advantages, (i) to resist an impulsive earthquake input through the base-isolation system and (ii) to withstand a longduration earthquake input through the building-connection system. A simple response evaluation method without the need of non-linear time-history response analysis is proposed here for this hybrid building system under a long-period and long-duration ground motion. An analytical expression is derived in the plastic deformation of an elastic-perfectly plastic single-degree-of-freedom (SDOF) model with viscous damping under the multi-impulse, which is the representative of long-period and long-duration ground motions. A transformation procedure of a base-isolation building-connection hybrid structural system into an SDOF model is proposed by introducing two steps, one is the reduction of the main base-isolated building to an SDOF system, and the other is the reduction of the connecting oil dampers supported on a free-wall to an oil damper with a newly introduced compensation factor on a rigid wall. Application of the analytical expression of the plastic deformation to the reduced SDOF model including the compensation factor on the connecting oil dampers enables the development of a simplified, but rather accurate response evaluation method. The time-history response analysis of the multi-degree-of-freedom model and the comparison with the proposed simplified formula make clear the accuracy and reliability of the proposed simplified response evaluation method.

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Double and Triple Impulses for Capturing Critical Elastic-Plastic Response Properties and Robustness of Building Structures Under Near-Fault Ground Motions

Kojima

Fujita

Takewaki

2019

Resilient Structures and Infrastructure

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Robustness of SDOF elastoplastic structure subjected to double-impulse input under simultaneous uncertainties of yield deformation and stiffness

Cited by 4 publications

References 22 publications

Robustness Evaluation of Elastoplastic Base-Isolated High-Rise Buildings Subjected to Critical Double Impulse

Robustness Evaluation of Elastoplastic Base-Isolated High-Rise Buildings Subjected to Critical Double Impulse

A Simple Response Evaluation Method for Base-Isolation Building-Connection Hybrid Structural System under Long-Period and Long-Duration Ground Motion

Double and Triple Impulses for Capturing Critical Elastic-Plastic Response Properties and Robustness of Building Structures Under Near-Fault Ground Motions

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