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http://dx.doi.org/10.5000/EESK.2011.15.2.023

Seismic Performance Evaluation of a Cone-type Friction Pendulum Bearing System  

Jeon, Bub-Gyu (부산대학교 사회환경시스템공학과)
Chang, Sung-Jin (부산대학교 사회환경시스템공학과)
Park, Kyung-Rock (부산대학교 사회환경시스템공학과)
Kim, Nam-Sik (부산대학교 사회환경시스템공학부)
Jung, Duk-Young ((주)엔타이어세이프)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.15, no.2, 2011 , pp. 23-33 More about this Journal
Abstract
In this study, a CFPBS (Cone-type Friction Pendulum Bearing System) was developed which controls the acceleration delivered to the structure to prevent damage and degradation of the critical communication equipment in case of an earthquake. The isolation performance of the CFPBS was evaluated by numerical analysis. The CFPBS was manufactured in the shape of a cone differenced from the existing FPS (Friction Pendulum System), and a pattern was engraved on the friction surface. The natural frequencies of the CFPBS were evaluated from a free-vibration test with the seismic isolator system consisting of four CFPBSs. In order to verify its earthquake-resistant performance, a numerical analysis program was created from the equation of the CFPBS induced from the equations of motion. A simplified theoretical equation of the CFPBS was proposed to manufacture the equipment which could demonstrate the necessary performance. Artificial seismic waves satisfying the maximum earthquake scale of the Korean Building Code-Structural (KBC-2005) were created and verified to review the earthquake-resistant performance of the CFPBS by numerical analysis. The superstructural mass of the CFPBS and skew angle of the friction surface were considered for numerical analysis with El Centro NS (1940), Kobe NS (1995) and artificial seismic waves. The CFPBS isolation performance evaluation was based on the results of numerical analysis and the executed comparative analysis between the results from numerical analysis and the simplified theoretical equation under the same conditions.
Keywords
Friction Pendulum System; Seismic Isolator; Artificial Earthquake; Numerical Analysis;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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