Mechanical performance and damping effect of multi‐stage yield metal sleeve damper. Issue 2 (15th October 2021)

• Record Type: Journal Article
• Authors: Wu, Shan; He, Haoxiang; Cheng, Shitao; Chen, Yifei; Wang, Zheng
• Is Part Of: Structural control and health monitoring. Volume 29:Issue 2(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-10-15
• Subjects: finite element method -- mechanical performance -- metal damper -- multi‐stage yield -- quasi‐static experiment; Structural engineering -- Periodicals; Structural control (Engineering) -- Periodicals; Automatic data collection systems -- Periodicals; Detectors -- Periodicals; 624.17
• DOI: 10.1002/stc.2864
• Languages: English
• ISSNs: 1545-2255

Abstract

Summary: The traditional metal yield dampers such as buckling‐restrained brace are designed only for strong earthquakes. Under small earthquake, it is difficult to dissipate the energy for common single‐stage yield damper. In addition, it is difficult to observe its damage state after earthquake and inconvenient to replace the energy dissipation components separately. Therefore, a new metal sleeve damper which can dissipate the energy under all levels of earthquakes is proposed in this study. Due to the different yield displacements of the energy dissipation strips with different aspect ratios, the damper has multi‐stage yield characteristics. Considering the stiffness degradation effect from the semi‐rigid joints on both sides of the strips, the mechanical performance parameters of the damper are derived. The quasi‐static experiment of the damper is carried out. Finite element method (FEM) is utilized to simulate the performance of the damper. At last, the damping effects of the multi‐stage yield damper and common single‐stage yield damper are compared. The results indicate that the accuracies of the mechanical performance parameters computation formulas are high. The energy dissipation performance of the multi‐stage yield damper is excellent. The correctness of the finite element (FE) modeling method is verified. The seismic performance of the RC frame with the multi‐stage yield damper is improved significantly under all levels of earthquakes. Comparing with the single‐stage yield damper, the multi‐stage yield damper is more effective in the vibration control of the reinforced concrete (RC) frame.