Effect of Supplemental Viscous Damping on the Seismic Response of Structural Systems with Metallic Dampers

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Abstract
Metallic dampers can enhance structural performance by reducing seismically induced lateral displacements, and by reducing inelastic behavior of beams and columns. Limiting story drift also indirectly allows us to mitigate damage of nonstructural components that are sensitive to lateral deformations. However, many nonstructural elements and components are vulnerable to excessive accelerations. Therefore, in order to protect these components, floor accelerations in buildings should be kept below certain limits. In this perspective, this paper investigates the seismic performance of single-degree-of-freedom (SDOF) systems with metallic and viscous dampers installed in parallel, to determine the effectiveness or appropriateness of using metallic dampers to mitigate lateral displacements, simultaneously with viscous dampers to reduce acceleration demands, knowing that their behavior is fundamentally different (i.e., metallic dampers are displacement dependent, whereas velocity dampers are velocity dependent)....

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