Earthquake Response Prediction of Seismically Isolated Buildings Based on Response Spectrum Method Considering Changes in Characteristics of Lead Rubber Bearings Due to Repeated Deformation

Kobayashi, Masahito; Sato, Keita; Satō, Kazunori

doi:10.3130/aijs.87.1123

Nihon Kenchiku Gakkai Kozokei Ronbunshu

2022

DOI: 10.3130/aijs.87.1123

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Earthquake Response Prediction of Seismically Isolated Buildings Based on Response Spectrum Method Considering Changes in Characteristics of Lead Rubber Bearings Due to Repeated Deformation

Masahito Kobayashi

Keita Sato

Kazunori Satō

Abstract: In 2016, a countermeasure against the Nankai trough long-period and long-duration ground motions (LPGMs) was announced.However, the response spectrum method (RSM), indicated by the Ministry of Construction notification Vol. 2009 (MCN), is out of the countermeasure. An RSM that considers characteristic changes due to repeated deformation has also been proposed, but since the damping correction formula of MCN is used, its applicability to LPMGs has not been sufficiently investigated. In this paper, we proposed a… Show more

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2024

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Earthquake response prediction of seismically isolated buildings based on response spectrum method considering changes in characteristics of lead rubber bearings due to repeated deformations, part 2: Improvement of prediction accuracy by equivalent damping factor calculation method using effective ductility factor

Kobayashi,

Zhu,

Senda

2024

Japan Architectural Review

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The response spectrum method (RSM), specified by the Ministry of Construction notification Vol. 2009, is not part of the countermeasure to address the Nankai trough long‐period and long‐duration ground motions (LPGMs) announced in 2016. Consequently, in this study, an approach was proposed to assess the effect of changes in characteristics due to repeated deformations using the RSM for LPGMs and seismically isolated buildings using lead rubber bearings (LRBs). However, this study identified potential areas for improvement in the calculation of effective damping using the RSM. An effective damping calculation method of the RSM using an effective ductility factor is introduced to enhance the accuracy of the proposed method. The proposed RSM‐based method was verified against the methods based on nonlinear time history analysis. The earthquake response prediction results using the proposed method were compared with those of not only the simplified method but also the precise and the quasi‐precise methods. The accuracy of earthquake response prediction using the proposed approach is increased by 30%–50% when the effective ductility factor is used to compute the effective damping. Therefore, earthquake response can be predicted using the proposed method, and the accuracy achieved is similar to the nonlinear time history analysis.

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Earthquake response prediction of seismically isolated buildings based on response spectrum method considering changes in characteristics of lead rubber bearings due to repeated deformations, part 2: Improvement of prediction accuracy by equivalent damping factor calculation method using effective ductility factor

Kobayashi,

Zhu,

Senda

2024

Japan Architectural Review

View full text Add to dashboard Cite

show abstract

Earthquake Response Prediction of Seismically Isolated Buildings Based on Response Spectrum Method Considering Changes in Characteristics of Lead Rubber Bearings Due to Repeated Deformation (Part 2): Improvement of Prediction Accuracy by Equivalent Damping Factor Calculation Method Using Effective Ductility Factor

KOBAYASHI,

ZHU,

SENDA

2024

Nihon Kenchiku Gakkai Kozokei Ronbunshu

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Since the response spectrum method (RSM), indicated by the Ministry of Construction notification Vol. 2009 (MCN), is out of the countermeasure against the Nankai trough long-period and long-duration ground motions (LPGMs) announced in 2016, we proposed a method for evaluating the influence of characteristic changes due to repeated deformation using RSM for LPGMs and seismically isolated buildings using lead rubber bearings. However, we identified potential areas for improvement in the effective damping calculation of RSM. In this paper, we propose an effective damping calculation method of RSM using effective ductility factor to improve the accuracy of the proposal method.

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Earthquake Response Prediction of Seismically Isolated Buildings Based on Response Spectrum Method Considering Changes in Characteristics of Lead Rubber Bearings Due to Repeated Deformation

Cited by 2 publications

References 4 publications

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