Abstract
This study proposes a relatively simple steel damper with high energy dissipation capacity. Three types of steel dampers were evaluated for structural performance. The first damper with U-shape had two vertical members and a semicircular connecting member for energy dissipation. The second damper with an angled U-shape replaced the connecting member with a horizontal steel member. The last damper with D-shape had a horizontal member added to the U-shaped damper. All the dampers were designed with steel plates on both sides that transmitted external shear force to the energy-dissipating members. To evaluate the structural performance of the dampers, an in-plane cyclic shear force was applied to the specimens. The D-shaped damper showed ductile behavior with excellent energy dissipation capacity after yielding without decreasing in strength during cyclic load. In other words, the D-shaped specimen showed excellent performance, with about 3.5 times the strength of the U-shaped specimen and about 3.8 times the energy dissipation capacity due to the additional horizontal member. Furthermore, the efficient energy dissipation of the proposed D-shaped steel damper was confirmed from the finite element (FE) analytical and experimental results.
Highlights
One of most important purposes of building structures is to protect humans from nature, and design methods that reduce structural damage caused by external loads are constantly being developed
The efficient energy dissipation of the proposed D-shaped steel damper was confirmed from the finite element (FE) analytical and experimental results
D-shaped steel damper subjected to cyclic loading, and the following results were obtained
Summary
One of most important purposes of building structures is to protect humans from nature, and design methods that reduce structural damage caused by external loads are constantly being developed. There are even methods being developed to mitigate damage caused by natural phenomena that are difficult to predict, such as earthquakes. Seismic design includes seismic resistance, seismic isolation, and seismic damping to design structures that are safe from earthquakes. Seismic resistance allows a structure to directly absorb seismic energy, and it can protect human life during a strong earthquake, but severe residual deformation due to the inelastic behavior of the structure results in enormous social costs and environmental pollution due to demolition. Seismic damping allows the damping device, instead of the structure, to absorb the seismic energy
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