In this paper, a base isolator called a multiple direction optimized-friction pendulum system (Multiple DO-FPS) with numerous sliding interfaces is proposed. To understand the mechanical behavior of the Multiple DO-FPS isolator under multidirectional excitations, an analytical model called the multiple yield and bounding surfaces model is proposed. On the basis of the derived mathematical formulations for simulation of the characteristics of the Multiple DO-FPS isolation bearing, it is revealed that the natural period and damping effect of the Multiple DO-FPS isolator are a function of the sliding displacement and sliding direction. By virtue of the proposed model, the phenomena of the sliding motions of the Multiple DO-FPS isolator with numerous sliding interfaces subjected to multidirectional excitations can be understood in a simple manner. The analytical results indicate that the natural frequency and damping effect of the Multiple DO-FPS isolator with numerous concave sliding interfaces change continually during earthquakes and are controllable through appropriate designs.
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April 2012
Research Papers
Characteristics and Modeling of Multiple Direction Optimized-Friction Pendulum System With Numerous Sliding Interfaces Subjected to Multidirectional Excitations
C. S. Tsai,
C. S. Tsai
Professor
Department of Civil Engineering, Feng Chia University
, Taichung 407, Taiwan
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H. C. Su,
H. C. Su
Associate Professor
Department of Water Resources Engineering and Conservation, Feng Chia University
, Taichung, Taiwan
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Yung-Chang Lin, Ph.D.
Yung-Chang Lin, Ph.D.
Student Graduate
Institute of Civil and Hydraulic Engineering, Feng Chia University
, Taichung, Taiwan
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C. S. Tsai
Professor
Department of Civil Engineering, Feng Chia University
, Taichung 407, Taiwan
H. C. Su
Associate Professor
Department of Water Resources Engineering and Conservation, Feng Chia University
, Taichung, Taiwan
Yung-Chang Lin, Ph.D.
Student Graduate
Institute of Civil and Hydraulic Engineering, Feng Chia University
, Taichung, Taiwan
J. Pressure Vessel Technol. Apr 2012, 134(2): 021801 (8 pages)
Published Online: January 25, 2012
Article history
Received:
March 2, 2011
Revised:
October 20, 2011
Online:
January 25, 2012
Published:
January 25, 2012
Citation
Tsai, C. S., Su, H. C., and Lin, Y. (January 25, 2012). "Characteristics and Modeling of Multiple Direction Optimized-Friction Pendulum System With Numerous Sliding Interfaces Subjected to Multidirectional Excitations." ASME. J. Pressure Vessel Technol. April 2012; 134(2): 021801. https://doi.org/10.1115/1.4005398
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