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A platform for research: civil engineering, architecture and urbanism
Study of an innovative graded yield metal damper
Abstract Metal dampers have been widely used to improve the seismic performance of the building structure. However, conventional metal dampers only possess one yield point and cannot protect the structure efficiently under earthquakes of different intensities. A new type of metal damper composed of two annular metal dampers with different sizes is proposed in this paper. It is a graded yield metal damper having two yield points, which can be used to reduce the responses of the structure efficiently under earthquakes of different intensities. Firstly, the mechanical properties of single annular metal damper, such as the failure mechanism, hysteretic behavior and anti-fatigue performance, are investigated by cyclic loading tests. The test results show that the annular metal dampers possess large deformation capacity and energy-dissipation capacity as well as excellent anti-fatigue performance. The calculation formulae are derived to determine major mechanical parameters of the damper. The theoretical results obtained by using the proposed calculation formulae are in good agreement with experimental results. Cyclic loading tests are carried out on the graded yield metal damper. The yielding process of the graded yield metal damper is simulated using the ABAQUS program. The trilinear kinematic hardening model is adopted to simulate the hysteretic behavior of the damper. Nonlinear time history analyses are carried out to compare the responses of a conventional reinforced concrete (RC) moment-resisting frame structure with that of the structure installed with the graded yield metal dampers under three levels of earthquakes using SAP2000. The results indicate that the seismic performance of the structure installed with the graded yield metal dampers under all levels of earthquakes is improved significantly. The graded yield metal dampers are more effective in displacement control of reinforced concrete moment-resisting frame structure in comparison with single yield point metal dampers.
Highlights A new type of metal damper, graded yield metal damper possessing two yield points, is proposed in this study. The trilinear kinematic hardening model is proposed to simulate the hysteretic behavior of the damper. The new damper can be used to mitigate the responses as well as the damage of the building structure efficiently under multiple levels of earthquakes. The graded yield metal dampers are more effective in displacement control of reinforced concrete moment-resisting frame structure in comparison with single yield point metal dampers.
Study of an innovative graded yield metal damper
Abstract Metal dampers have been widely used to improve the seismic performance of the building structure. However, conventional metal dampers only possess one yield point and cannot protect the structure efficiently under earthquakes of different intensities. A new type of metal damper composed of two annular metal dampers with different sizes is proposed in this paper. It is a graded yield metal damper having two yield points, which can be used to reduce the responses of the structure efficiently under earthquakes of different intensities. Firstly, the mechanical properties of single annular metal damper, such as the failure mechanism, hysteretic behavior and anti-fatigue performance, are investigated by cyclic loading tests. The test results show that the annular metal dampers possess large deformation capacity and energy-dissipation capacity as well as excellent anti-fatigue performance. The calculation formulae are derived to determine major mechanical parameters of the damper. The theoretical results obtained by using the proposed calculation formulae are in good agreement with experimental results. Cyclic loading tests are carried out on the graded yield metal damper. The yielding process of the graded yield metal damper is simulated using the ABAQUS program. The trilinear kinematic hardening model is adopted to simulate the hysteretic behavior of the damper. Nonlinear time history analyses are carried out to compare the responses of a conventional reinforced concrete (RC) moment-resisting frame structure with that of the structure installed with the graded yield metal dampers under three levels of earthquakes using SAP2000. The results indicate that the seismic performance of the structure installed with the graded yield metal dampers under all levels of earthquakes is improved significantly. The graded yield metal dampers are more effective in displacement control of reinforced concrete moment-resisting frame structure in comparison with single yield point metal dampers.
Highlights A new type of metal damper, graded yield metal damper possessing two yield points, is proposed in this study. The trilinear kinematic hardening model is proposed to simulate the hysteretic behavior of the damper. The new damper can be used to mitigate the responses as well as the damage of the building structure efficiently under multiple levels of earthquakes. The graded yield metal dampers are more effective in displacement control of reinforced concrete moment-resisting frame structure in comparison with single yield point metal dampers.
Study of an innovative graded yield metal damper
Chen, Yun (author) / Chen, Chao (author) / Jiang, Huanjun (author) / Liu, Tao (author) / Wan, Zhiwei (author)
Journal of Constructional Steel Research ; 160 ; 240-254
2019-05-22
15 pages
Article (Journal)
Electronic Resource
English