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摘要
En 中文
In this paper, a new passive earthquake energy dissipative device, called the dual-pipe damper (DPD), is introduced, tested and analytically studied. The device consists of two pipes welded at selected locations and loaded in shear. The inelastic cyclic deformation dissipates energy mainly through flexure of the pipe body. However, at large displacements a tension diagonal forms in the middle of the device which further adds to stiffness and strength. The strength, stiffness and energy dissipation of the DPD is more than two single pipe dampers that were previously studied. Cyclic quasi-static tests were performed on four samples of DPD. Excellent ductility, energy absorption and stable hysteresis loops were observed in all specimens. A finite element model, considering nonlinearity, large deformation, contact and material damage is developed to conduct a parametric study on different pipe sizes. Relationships that define the DPD behavioral characteristics are given for any pipe size. The DPD is very light-weight, easily fabricated and economical. It has a high deformation capacity of about 36% of its height. Possessing these features, the introduced damper is applicable as a useful device for passive control of structures. (C) 2013 Elsevier Ltd. All rights reserved.
Keyword:
Seismic
Passive control
Passive device
Damper
Hysteresis
Energy dissipation
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Semi-active control systems for seismic protection of structures: a state-of-the-art review用于结构地震防护的半主动控制系统: 最新技术综述.png)
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