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- Title
Sloped multi-roller isolation devices for seismic protection of equipment and facilities.
- Authors
Wang, Shiang‐Jung; Hwang, Jenn‐Shin; Chang, Kuo‐Chun; Shiau, Chia‐Yi; Lin, Wang‐Chuen; Tsai, Mu‐Sen; Hong, Jia‐Xiang; Yang, Yin‐Han
- Abstract
SUMMARY The rolling motion of mutually orthogonal rollers respectively sandwiched between two bearing plates in which one or both have V-shaped sloping surfaces makes the sloped rolling-type isolation device have an excellent in-plane seismic isolation performance. In this study, the sloped rolling type isolation device in which a single roller moves between two V-shaped sloping surfaces along each principle horizontal direction is refined by incorporating multi-roller, built-in damping, and pounding prevention mechanisms. The associated dynamic behavior is further clarified, and a simplified twin-flag hysteretic model, which can be easily applied in most commercial computational tools is then proposed. Seismic simulation tests on the refined isolation devices (i.e. the sloped multi-roller isolation devices) with different design parameters such as sloping angles of bearing plates and built-in damping capabilities, together with a raised floor system by employing the sloped multi-roller isolation devices, were conducted. Not only is the efficiency of the sloped multi-roller isolation devices in seismically protecting the important objects, but also the practicability and accuracy of the proposed simplified numerical model in predicting the seismic responses of the sloped multi-roller isolation devices is experimentally verified. Copyright © 2014 John Wiley & Sons, Ltd.
- Subjects
EQUIPMENT &; supplies; EARTHQUAKES; ROLLING (Aerodynamics); DESIGN; ACCURACY
- Publication
Earthquake Engineering & Structural Dynamics, 2014, Vol 43, Issue 10, p1443
- ISSN
0098-8847
- Publication type
Article
- DOI
10.1002/eqe.2404