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Hysteretic and seismic performance of disc spring-based self-centering viscous dampers for improved seismic resilience
Abstract This study presents an innovative self-centering viscous damper with flag-shaped hysteretic behavior to address critical issues in the current self-centering bracing system and enhance its structural resilience against earthquakes. First, the basic configuration, working principle, and simplified physical model are described in detail. Then a comprehensive experimental study is conducted on large-scale damper specimens with different design parameters. The damper exhibits a typical flag-shaped hysteretic behavior, and disc springs combined in parallel can significantly increase the load-bearing capacity and the second stiffness of the damper. Subsequently, a numerical modeling technique is developed to capture the complex nonlinear behavior of the proposed damper accurately. Finally, the study is further extended to a structure-level analysis to investigate the influence of key brace-design parameters on the overall response of the structure along with its collapse fragility. It is found that the rational design of the self-centering viscous damper can effectively suppress the peak inter-story drift, residual inter-story drift, and peak absolute floor acceleration of the structure, thereby achieving a favorable trade-off in the design outcome. Additionally, reducing the self-centering ratio and increasing the loading stiffness ratio are effective measures to improve the collapse resistance of such structures.
Highlights A novel self-centering viscous damper using parallel-disc springs is introduced. A comparative experiment of SCVD with different design parameters is conducted. A precise numerical multi-spring modeling technique to simulate SCVD is developed. The impact of SCVD design parameters on overall structural response is analyzed. The collapse resistance capacity of SCVDF is further explored.
Hysteretic and seismic performance of disc spring-based self-centering viscous dampers for improved seismic resilience
Abstract This study presents an innovative self-centering viscous damper with flag-shaped hysteretic behavior to address critical issues in the current self-centering bracing system and enhance its structural resilience against earthquakes. First, the basic configuration, working principle, and simplified physical model are described in detail. Then a comprehensive experimental study is conducted on large-scale damper specimens with different design parameters. The damper exhibits a typical flag-shaped hysteretic behavior, and disc springs combined in parallel can significantly increase the load-bearing capacity and the second stiffness of the damper. Subsequently, a numerical modeling technique is developed to capture the complex nonlinear behavior of the proposed damper accurately. Finally, the study is further extended to a structure-level analysis to investigate the influence of key brace-design parameters on the overall response of the structure along with its collapse fragility. It is found that the rational design of the self-centering viscous damper can effectively suppress the peak inter-story drift, residual inter-story drift, and peak absolute floor acceleration of the structure, thereby achieving a favorable trade-off in the design outcome. Additionally, reducing the self-centering ratio and increasing the loading stiffness ratio are effective measures to improve the collapse resistance of such structures.
Highlights A novel self-centering viscous damper using parallel-disc springs is introduced. A comparative experiment of SCVD with different design parameters is conducted. A precise numerical multi-spring modeling technique to simulate SCVD is developed. The impact of SCVD design parameters on overall structural response is analyzed. The collapse resistance capacity of SCVDF is further explored.
Hysteretic and seismic performance of disc spring-based self-centering viscous dampers for improved seismic resilience
Yan, Xin (author) / Shu, Ganping (author) / Zhang, Ruibin (author) / Alam, M. Shahria (author) / Qin, Ying (author)
Engineering Structures ; 300
2023-11-09
Article (Journal)
Electronic Resource
English
Self-centering hybrid dampers for improving seismic resilience
| Elsevier | 2021
Self-centering hybrid dampers for improving seismic resilience
| Elsevier | 2021