In the present study, experimental work has been carried out to investigate the comparative behaviour of two types of metallic dampers consisting of plates yielding under both shear and flexure. The first damper consists of two X-shape plates (added damping and stiffening, ADAS) at both ends and a shear plate in the middle; the second damper consists of a shear plate in the middle and four K- plates on either side of the shear plate. K-plates and X-shape plates were oriented to yield under flexure, whereas Shear plate yield under shear. Performance parameters such as lateral load carrying capacity, energy dissipation potential, and hysteretic performances of these dampers have been investigated and compared. Since X-shaped plates in the first damper were placed outside the shear web, both components act independently. In contrast, K plates in the second damper support the shear plate in the weak direction and reduce out-of-plane buckling, thus giving stable hysteresis.

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Comparative Study of Hysteretic Behaviour of Metallic Dampers with Combined Yielding Mechanism

  • Mohan Bajaj,
  • Pankaj Agarwal

摘要

In the present study, experimental work has been carried out to investigate the comparative behaviour of two types of metallic dampers consisting of plates yielding under both shear and flexure. The first damper consists of two X-shape plates (added damping and stiffening, ADAS) at both ends and a shear plate in the middle; the second damper consists of a shear plate in the middle and four K- plates on either side of the shear plate. K-plates and X-shape plates were oriented to yield under flexure, whereas Shear plate yield under shear. Performance parameters such as lateral load carrying capacity, energy dissipation potential, and hysteretic performances of these dampers have been investigated and compared. Since X-shaped plates in the first damper were placed outside the shear web, both components act independently. In contrast, K plates in the second damper support the shear plate in the weak direction and reduce out-of-plane buckling, thus giving stable hysteresis.