Elastic and Inelastic Seismic Response of Buildings with Damping Systems

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Abstract
The effect of damping on the response of elastic and inelastic single‐degree‐of‐freedom systems was studied by nonlinear response‐history analysis using earthquake histories that matched on average a 2000 NEHRP spectrum on a stiff soil site for a region of high seismic risk. New displacement reduction factors for levels of damping greater than 5% of critical are presented. New equations to relate inelastic and elastic displacements in the short‐period range, for levels of damping greater than 5% of critical, are presented. The technical basis for reducing the minimum design base shear in damped buildings by a maximum of 25%, from that required for the corresponding undamped building, is derived based on comparable levels of damage in both the damped and undamped buildings.

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