Analytical Investigation of the Structural Fuse Concept (English)

2006
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This report presents an analytical study of the structural fuse concept, which is a system that is designed to concentrate seismic damage in easy-to-replace devices, in this case metallic dampers, to allow the primary structure to remain elastic. A comprehensive parametric study was conducted to investigate the range of validity of this concept, and identify combinations of key parameters essential to ensure adequate performance under seismic conditions. Nonlinear time history analyses were conducted to identify viable combinations of parameters. These were used to provide guidelines for several types of metallic dampers, including Buckling-restrained Braces (BRBs), Triangular Added Damping and Stiffness (TADAS), and Shear Panels (SP) for use in design and retrofit. As part of this research, floor demand velocities and accelerations were investigated to assess the applicability of the structural fuse concept to nonstructural components. A companion study provides the experimental validation of the analytical models developed in this report (see Technical report MCEER-06-0005).