Evaluation of Simplified Methods of Analysis of Yielding Structures with Damping Systems

Abstract

The 2000 NEHRP Provisions include simplified methods of analysis of inelastic buildings equipped with linear viscous, nonlinear viscous, and hysteretic damping devices. These methods are based in part on the data presented in the paper. Nonlinear response-history analysis was used to validate the methods. The derivation of the 2000 NEHRP simplified methods for calculating the maximum acceleration and maximum velocity in damped framing systems are presented. These simplified methods produce exact or conservative estimates of peak displacement and peak acceleration, and reasonable estimates of peak velocities. The estimated velocities are within 25% of the average values obtained from response-history analysis for a broad range of periods and damping ratios. Velocity correction factors are provided to calculate peak velocity given the pseudo-velocity.

Response of elastic and inelastic structures with damping systems to near-field and soft-soil ground motions

“…These procedures are largely based on studies that excluded the effects of near-field and soft-soil seismic excitations [2][3][4][5][6]. This paper presents results of a systematic assessment of the validity of these methods for these special classes of seismic excitations.…”

“…Recently, Ramirez et al [2][3][4][5][6] evaluated the accuracy of simplified methods of analysis of buildings with damping systems. Particularly, the simplified analysis methods of 2000 NEHRP Recommended Procedures [1] and 1997 NEHRP Guidelines for the Seismic Rehabilitation of Buildings [16] have been evaluated and shown to produce results of acceptable accuracy.…”

Assessment of capacity design of columns in steel moment resisting frames with viscous dampers

“…those associated with the maximum displacement, maximum velocity and maximum acceleration. The effectiveness of the ASCE 7-10 procedure has been extensively evaluated with seismic simulations on steel MRFs with viscous dampers under the design basis and maximum considered earthquake (DBE and MCE, respectively) intensities in [14,15]. Guo and Christopoulos [16] proposed an alternative design procedure for multiple target performance objectives utilizing a graphic tool to estimate peak response parameters of yielding structures with passive dampers either by nonlinear response history analyses or by an equivalent linearization procedure.…”

Evaluation of seismic performance of multistory building structures based on the equivalent responses

“…Through parametric studies of effective period, effective or secant stiffness, and added viscous damping ratio, the reliability and the adequacy of inelastic behaviors for the building structures with damping systems have been verified by Ramirez et al [22,23]. This application of the CSM which was modified for structures with damping systems is described in NEHRP-2000 as a simplified analysis method [24].…”