Dynamic loading tests and seismic response analysis of a stud-type damper composed of multiple friction units with disc springs |
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| Authors: | Takeshi Sano Kazutaka Shirai Yasumasa Suzui Yoshikazu Utsumi |
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| Institution: | 1. Technology Division, Obayashi Corporation, Tokyo, Japan;2. Faculty of Engineering, Hokkaido University, Sapporo, Japan;3. Technical Research Institute, Obayashi Corporation, Tokyo, Japan;4. Specialty Construction Department, Obayashi Corporation, Tokyo, Japan |
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| Abstract: | This paper presents an experimental study on the performance of a shear-sliding stud-type damper composed of multiple friction units with high-tension bolts and disc springs. A numerical evaluation of the response reduction effects achieved by the stud-type damper is also presented. In dynamic loading tests, the behavior of stud-type multiunit friction damper specimens was investigated. Three different full-scale damper specimens, which were composed of five, six, or seven friction units with two or four sliding surfaces, were incorporated into loading devices for testing. The stud-type friction dampers demonstrated stable rigid-plastic hysteresis loops without any remarkable decrease in the sliding force even when subjected to repetitive loading, in addition to showing no unstable behavior such as lateral buckling. The damper produced a total sliding force approximately proportional to the number of sliding surfaces and friction units. The total sliding force of the stud-type damper can thus be estimated by summing the contributions of each friction unit. In an earthquake response simulation, the control effects achieved by stud-type dampers incorporated into an analytical high-rise building model under various input waves, including long-period, long-duration and pulse-like ground motions, were evaluated. A satisfactory response reduction was obtained by installing the developed stud-type dampers into the main frame without negatively impacting usability and convenience in terms of building planning. |
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| Keywords: | earthquake response high-rise building long-period long-duration ground motion multiunit friction damper pulse-like ground motion rigid-plastic hysteresis loop |
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