Effects of shear keys on seismic performance of an isolation system

Biao Wei; Chaobin Li; Xiaolong Jia; Xuhui He; Menggang Yang

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자료유형: 학술저널

저자정보: Biao Wei (Central South University) Chaobin Li (Central South University) Xiaolong Jia (Central South University) Xuhui He (Central South University) Menggang Yang (Central South University)

저널정보: 국제구조공학회 Smart Structures and Systems, An International Journal Smart Structures and Systems, An International Journal Vol.24 No.3

발행연도: 2019.1

수록면: 345 - 360 (16page)

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The shear keys are set in a seismic isolation system to resist the long-term service loadings, and are cut off to isolate the earthquakes. This paper investigated the influence of shear keys on the seismic performance of a vertical spring-viscous damper-concave Coulomb friction isolation system by an incremental dynamic analysis (IDA) and a performance-based assessment. Results show that the cutting off process of shear keys should be simulated in a numerical analysis to accurately predict the seismic responses of isolation system. Ignoring the cutting off process of shear keys usually leads to untrue seismic responses in a numerical analysis, and many of them are unsafe for the design of isolated structure. And those errors will be increased by increasing the cutting off force of shear keys and decreasing the spring constant of shear keys, especially under a feeble earthquake. The viscous damping action postpones the cutting off time of shear keys during earthquakes, and reduces the seismic isolation efficiency. However, this point can be improved by increasing the spring constant of shear keys.

#seismic isolation #shear key #friction #viscous damper #spring

참고문헌 (38)

참고문헌 신청

E. Ya. Antonyuk / 2004 / Dynamic Modes of One Seismic-Damping Mechanism with Frictional Bonds / International Applied Mechanics 40(6):702~708

C.J. Begley / 1998 / IMPACT RESPONSE AND THE INFLUENCE OF FRICTION / Journal of Sound and Vibration 211(5):801~818

Lap-Loi Chung / 2013 / Optimal frictional coefficient of structural isolation system / Journal of Vibration and Control 21(3):525~538

Cui, S. / 2012 / Integrated design methodology for isolated floor systems in single-degree-of-freedom structural fuse systems

Fahjan, Y. / 2008 / Scaling of earthquake accelerograms for non-linear dynamic analysis to match the earthquake design spectra / Proceedings of the 14th World Conference on Earthquake Engineering

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