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Analytical and experimental study on sloped sliding‐type bearings
Seismic isolation design has been publicly accepted as one of the most effective strategies to reduce seismic threat to (or seismic demand for) the to‐be‐protected targets including building structures, infrastructure, and equipment. Recently, many studies have aimed to develop nonlinear seismic isolation systems, of which the sloped sliding‐type bearing can exhibit the nonlinear behavior by mechanically designing a simple slope for sliding motion. Therefore, this bearing does not have a fixed isolation frequency. In addition, it features that the seismic isolation performance is realized through the sliding mechanism, the inherent self‐centering capability is provided through the slope design, and the excellent and stable energy dissipation capability is contributed by the sliding friction. In this study, the equation of motion of the bearing is deduced first. Sensitivity analysis is then performed, and the results demonstrate that the maximum horizontal acceleration transmitted to the isolated superstructure is only dependent on two important design parameters‐sliding friction coefficients and sloping angles. In other words, the acceleration control performance of the bearing is irrelevant to different characteristics of external disturbance. Finally, shaking table tests were conducted to verify the effectiveness of the bearing and the accuracy of the numerical prediction.
Analytical and experimental study on sloped sliding‐type bearings
Seismic isolation design has been publicly accepted as one of the most effective strategies to reduce seismic threat to (or seismic demand for) the to‐be‐protected targets including building structures, infrastructure, and equipment. Recently, many studies have aimed to develop nonlinear seismic isolation systems, of which the sloped sliding‐type bearing can exhibit the nonlinear behavior by mechanically designing a simple slope for sliding motion. Therefore, this bearing does not have a fixed isolation frequency. In addition, it features that the seismic isolation performance is realized through the sliding mechanism, the inherent self‐centering capability is provided through the slope design, and the excellent and stable energy dissipation capability is contributed by the sliding friction. In this study, the equation of motion of the bearing is deduced first. Sensitivity analysis is then performed, and the results demonstrate that the maximum horizontal acceleration transmitted to the isolated superstructure is only dependent on two important design parameters‐sliding friction coefficients and sloping angles. In other words, the acceleration control performance of the bearing is irrelevant to different characteristics of external disturbance. Finally, shaking table tests were conducted to verify the effectiveness of the bearing and the accuracy of the numerical prediction.
Analytical and experimental study on sloped sliding‐type bearings
Yang, Cho‐Yen (author) / Wang, Shiang‐Jung (author) / Lin, Chih‐Kuan (author) / Chung, Lap‐Loi (author) / Liou, Ming‐Chung (author)
2021-11-01
27 pages
Article (Journal)
Electronic Resource
English
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