000019417 001__ 19417
000019417 005__ 20170118182317.0
000019417 04107 $$aeng
000019417 046__ $$k2017-01-09
000019417 100__ $$aMckenna, Frank
000019417 24500 $$aModeling Viscous Damping in Nonlinear Response History Analysis of Buildings

000019417 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019417 260__ $$b
000019417 506__ $$arestricted
000019417 520__ $$2eng$$aThe Rayleigh damping model, which is pervasive in nonlinear response history analysis (RHA) of buildings, is shown to develop “spurious” damping forces and lead to inaccurate response results. We prove that a viscous damping matrix constructed by superposition of modal damping matrices—irrespective of the number of modes included or values assigned to modal damping ratios—completely eliminates the “spurious” damping forces. Based on response results, we conclude that the classical Rayleigh damping model is inappropriate. The two preferred damping models are (1) a modified Rayleigh damping model in which the stiffness-proportional term is based on a k that omits contributions from all rotational springs used to model plastic hinges; and (2) a damping matrix defined by superposition of modal damping matrices. The first of these two models is easier to understand and implement, whereas the second model has the advantage that it eliminates the spurious damping forces even if rotational springs that model plastic hinges include damping, as in some widely used computer programs.

000019417 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019417 653__ $$aBuildings, damping models, response history analysis, spurious damping forces

000019417 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019417 720__ $$aMckenna, Frank$$iChopra, Anil
000019417 8560_ $$ffischerc@itam.cas.cz
000019417 8564_ $$s339662$$uhttps://invenio.itam.cas.cz/record/19417/files/358.pdf$$yOriginal version of the author's contribution as presented on USB, paper 358.
000019417 962__ $$r16048
000019417 980__ $$aPAPER