Equivalent Lateral Force and Modal Analysis Procedures of the <i>2000 NEHRP Provisions</i> for Buildings with Damping Systems

Equivalent lateral force and modal analysis procedures for yielding buildings with damping systems were developed, validated, and incorporated in the 2000 NEHRP Provisions . The technical basis for each procedure is described in the paper together with the simplifications adopted for inclusion in the Provisions . Procedures for calculating the effective damping and effective period and higher mode damping ratios for buildings equipped with yielding, viscoelastic, linear viscous, and nonlinear viscous damping devices are presented.