Abstract
This paper describes the development process of a new low-steel composite friction material and the experiments to investigate its frictional behavior. Automotive braking technology was adapted to derive an optimal friction damper for buildings, and a high friction coefficient and stable behavior were set as the primary targets for performance. To improve performance, clamping details which incorporated load washers were also proposed. In order to evaluate the performance of the friction system, pseudo-dynamic tests were conducted. In the experiments, the proposed friction dampers showed repeatable, predictable, and very stable behavior without significant fading of frictional resistance, even under hundreds of repetitive sliding excursions. The friction load tended to be proportional to the initial clamping force regardless of the real-time clamping force, thus confirming that the behavior of the proposed dampers could be predicted using the idealized Coulomb friction model. It was also verified that frictional performance could be remarkably increased through the use of conical shaped load washers, when applied correctly. Furthermore, nonlinear time history analysis was performed on a five-story example building with and without friction dampers. Based on the results, the friction damped system demonstrated effectiveness in reducing structural responses such as roof displacement, base shear force, and story drift ratio compared to the original undamped frame system.
| Original language | English |
|---|---|
| Pages (from-to) | 279-295 |
| Number of pages | 17 |
| Journal | Engineering Structures |
| Volume | 122 |
| DOIs | |
| Publication status | Published - 2016 Sep 1 |
Fingerprint
Keywords
- Clamping detail
- Energy dissipation
- Friction damper
- Load washer
- Milled steel surface
- Nonlinear time history analysis
- Real application
- Sliding motion
- Tribosystem
ASJC Scopus subject areas
- Civil and Structural Engineering
Cite this
Friction between a new low-steel composite material and milled steel for SAFE Dampers. / Lee, Chang Hwan; Ryu, Jaeho; Oh, Jintak; Yoo, Chang Hee; Ju, Young-Kyu.
In: Engineering Structures, Vol. 122, 01.09.2016, p. 279-295.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Friction between a new low-steel composite material and milled steel for SAFE Dampers
AU - Lee, Chang Hwan
AU - Ryu, Jaeho
AU - Oh, Jintak
AU - Yoo, Chang Hee
AU - Ju, Young-Kyu
PY - 2016/9/1
Y1 - 2016/9/1
N2 - This paper describes the development process of a new low-steel composite friction material and the experiments to investigate its frictional behavior. Automotive braking technology was adapted to derive an optimal friction damper for buildings, and a high friction coefficient and stable behavior were set as the primary targets for performance. To improve performance, clamping details which incorporated load washers were also proposed. In order to evaluate the performance of the friction system, pseudo-dynamic tests were conducted. In the experiments, the proposed friction dampers showed repeatable, predictable, and very stable behavior without significant fading of frictional resistance, even under hundreds of repetitive sliding excursions. The friction load tended to be proportional to the initial clamping force regardless of the real-time clamping force, thus confirming that the behavior of the proposed dampers could be predicted using the idealized Coulomb friction model. It was also verified that frictional performance could be remarkably increased through the use of conical shaped load washers, when applied correctly. Furthermore, nonlinear time history analysis was performed on a five-story example building with and without friction dampers. Based on the results, the friction damped system demonstrated effectiveness in reducing structural responses such as roof displacement, base shear force, and story drift ratio compared to the original undamped frame system.
AB - This paper describes the development process of a new low-steel composite friction material and the experiments to investigate its frictional behavior. Automotive braking technology was adapted to derive an optimal friction damper for buildings, and a high friction coefficient and stable behavior were set as the primary targets for performance. To improve performance, clamping details which incorporated load washers were also proposed. In order to evaluate the performance of the friction system, pseudo-dynamic tests were conducted. In the experiments, the proposed friction dampers showed repeatable, predictable, and very stable behavior without significant fading of frictional resistance, even under hundreds of repetitive sliding excursions. The friction load tended to be proportional to the initial clamping force regardless of the real-time clamping force, thus confirming that the behavior of the proposed dampers could be predicted using the idealized Coulomb friction model. It was also verified that frictional performance could be remarkably increased through the use of conical shaped load washers, when applied correctly. Furthermore, nonlinear time history analysis was performed on a five-story example building with and without friction dampers. Based on the results, the friction damped system demonstrated effectiveness in reducing structural responses such as roof displacement, base shear force, and story drift ratio compared to the original undamped frame system.
KW - Clamping detail
KW - Energy dissipation
KW - Friction damper
KW - Load washer
KW - Milled steel surface
KW - Nonlinear time history analysis
KW - Real application
KW - Sliding motion
KW - Tribosystem
UR - http://www.scopus.com/inward/record.url?scp=84977090533&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84977090533&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2016.04.056
DO - 10.1016/j.engstruct.2016.04.056
M3 - Article
AN - SCOPUS:84977090533
VL - 122
SP - 279
EP - 295
JO - Engineering Structures
JF - Engineering Structures
SN - 0141-0296
ER -