TY - JOUR
T1 - Analysis of single-degree-of-freedom systems containing multifunctional friction damper
AU - Chien, Chia Shang Chang
AU - Lu, Lyan Ywan
AU - Tsai, Yu Lin
N1 - Publisher Copyright:
© 2014 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.
PY - 2014
Y1 - 2014
N2 - Friction dampers are one type of energy dissipation devices that are able to forms an efficient seismic protection system for seismic structures. Nevertheless, traditional friction dampers can only be designed under a target earthquake of a given intensity. Complied with the current design code, this target earthquake usually has an intensity of the return period of 475 years. Consequently, traditional friction dampers may function well under earthquakes with the intended design level, but may not be functional for earthquakes with lower intensities. This situation may pose a problem particularly for some functional facilities, which usually contain vibration-sensitive equipment that is vulnerable to earthquakes with moderate intensities. In order to satisfy the aforementioned multiple functional demands, this paper investigates the possible use of a novel multi-functional friction damper (MFD). Different from traditional friction dampers, the MFD has two-stage slip forces that can be activated in a moderate and a strong seismic level, respectively. The theory of the MFD and the formulation of a SDOF system with the MFD are both given in this paper. The results of the numerical simulation reveals that the MFD is able to reduce the structural responses under strong and moderate ground motions, simultaneously. In addition, the MFD is also more effective at reducing the structural responses under a moderate earthquake, as compared to the response result from a traditional friction damper.
AB - Friction dampers are one type of energy dissipation devices that are able to forms an efficient seismic protection system for seismic structures. Nevertheless, traditional friction dampers can only be designed under a target earthquake of a given intensity. Complied with the current design code, this target earthquake usually has an intensity of the return period of 475 years. Consequently, traditional friction dampers may function well under earthquakes with the intended design level, but may not be functional for earthquakes with lower intensities. This situation may pose a problem particularly for some functional facilities, which usually contain vibration-sensitive equipment that is vulnerable to earthquakes with moderate intensities. In order to satisfy the aforementioned multiple functional demands, this paper investigates the possible use of a novel multi-functional friction damper (MFD). Different from traditional friction dampers, the MFD has two-stage slip forces that can be activated in a moderate and a strong seismic level, respectively. The theory of the MFD and the formulation of a SDOF system with the MFD are both given in this paper. The results of the numerical simulation reveals that the MFD is able to reduce the structural responses under strong and moderate ground motions, simultaneously. In addition, the MFD is also more effective at reducing the structural responses under a moderate earthquake, as compared to the response result from a traditional friction damper.
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U2 - 10.1016/j.proeng.2014.06.372
DO - 10.1016/j.proeng.2014.06.372
M3 - Conference article
AN - SCOPUS:84949128106
VL - 79
SP - 500
EP - 505
JO - Procedia Engineering
JF - Procedia Engineering
SN - 1877-7058
T2 - 37th National Conference on Theoretical and Applied Mechanics, NCTAM 2013, Conjoined with the 1st International Conference on Mechanics, ICM 2013
Y2 - 8 November 2013 through 9 November 2013
ER -