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Development of steel dampers for bridges to allow large displacement through a vertical free mechanism |
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| Authors: | Peng Pan Hong Yan Tao Wang Peizhen Xu Qiang Xie |
| Institution: | 1. Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing, 100084, China 2. China Shanghai Architectural Design & Research Institute CO., Ltd., Shanghai, 200063, China 3. Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin, 150080, China 4. School of Civil Engineering, Qingdao Technological University, Qingdao, 266033, China 5. Department of Building Engineering, Tongji University, Shanghai, 200092, China |
| Abstract: | Isolation bearings and dampers are often installed between piers and superstructures to reduce the seismic responses of bridges under large earthquakes. This paper presents a novel steel damper for bridges. The damper employs steel plates as energy dissipation components, and adopts a vertical free mechanism to achieve a large deformation capacity. Quasi-static tests using displacement-controlled cyclic loading and numerical analyses using a finite element program called ABAQUS are conducted to investigate the behavior of the damper, and a design methodology is proposed based on the tests and numerical analyses. Major conclusions obtained from this study are as follows:(1) the new dampers have stable hysteresis behavior under large displacements;(2) finite element analyses are able to simulate the behavior of the damper with satisfactory accuracy; and(3) simplified design methodology of the damper is effective. |
| Keywords: | steel damper large deformation bridge cyclic loading numerical simulation |
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