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Smart Structures and Systems Volume 20, Number 2, August 2017 , pages 151-162 DOI: https://doi.org/10.12989/sss.2017.20.2.151 |
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Development of a double-sliding friction damper (DSFD) |
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Shaodong Shen, Peng Pan, Jiangbo Sun, Runhua Gong, Haishen Wang and Wei Li
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| Abstract | ||
| In practical engineering, the friction damper is a widely used energy dissipation device because of its large deformation capacity, stable energy dissipation capability, and cost effectiveness. While based on conventional friction dampers, the double-sliding friction damper (DSFD) being proposed is different in that it features two sliding friction forces, i.e., small and large sliding friction forces, rather than a single-sliding friction force of ordinary friction dampers. The DSFD starts to deform when the force sustained exceeds the small-sliding friction force, and stops deforming when the deformation reaches a certain value. If the force sustained exceeds the large sliding friction force, it continues to deform. Such a double-sliding behavior is expected to endow structures equipped with the DSFD better performance in both small and large earthquakes. The configuration and working mechanism of the DSFD is described and analyzed. Quasi-static loading tests and finite element analyses were conducted to investigate its hysteretic behavior. Finally, time history analysis of the single-degree-of-freedom (SDOF) and multi-degree-of-freedom (MDOF) systems were performed to investigate the seismic performance of DSFD-equipped structures. For the purpose of comparison, tests on systems equipped with conventional friction dampers were also performed. The proposed DSFD can be realized perfectly, and the DSFD-equipped structures provide better performances than those equipped with conventional friction dampers in terms of interstory drift and floor acceleration. In particular, for the MDOF system, the DSFD helps the structural system to have a uniform distributed interstory drift. | ||
| Key Words | ||
| friction damper; double-sliding; quasi-static test; finite element modeling; time history analysis | ||
| Address | ||
| Shaodong Shen, Jiangbo Sun, Runhua Gong, Haishen Wang and Wei Li: Department of Civil Engineering, Tsinghua University, Beijing 100084, China Peng Pan: Department of Civil Engineering, Tsinghua University, Beijing 100084, China; Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Tsinghua University, Beijing 100084, China | ||