Elastic and Inelastic Seismic Response of Buildings with Damping Systems

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.

Seismic structural and non-structural performance evaluation of highly damped self-centering and conventional systems

“…al. [15] studied inelastic SDOF systems for a wide range of periods of vibration and showed that added damping has no significant effect on the relation between peak elastic and peak inelastic displacements and also, confirmed the technical basis of FEMA 450 [16] to allow a 25% reduction in the minimum design base shear of damped buildings. Pavlou and Constantinou [17] showed that inelastic steel MRFs with passive dampers designed to achieve similar drifts with conventional MRFs experience lower total floor accelerations than conventional MRFs.…”

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.…”

An overview of modern seismic analyses with different ways of damping introduction

“…Generalized approach neviskozno i frekventno zavisno prigušenje). Generalizovani pristup u analizi prigušenja sistema kroz viskozno i neviskozno prigušenje prikazan je u studiji [2], dok su u [47] razmatrani faktori redukcije pomeranja i ukupne smičuće sile u funkciji prigušenja.…”

“…− nelinearna statička analiza (NSA -Nonlinear Static Analysis); − nelinearna dinamička analiza (NDA -Nonlinear to the analysis of the system's damping through viscous and non-viscous damping is shown in the case [2], while [47] considers the factors of reduction in displacement and total shear force as a function of damping. In [49] various aspects of seismic actions are considered in relation to the "standard" aspects of analysis of behavioural of structures exposed to seismic actions.…”