000018604 001__ 18604
000018604 005__ 20170118182230.0
000018604 04107 $$aeng
000018604 046__ $$k2017-01-09
000018604 100__ $$aCharney, Finley
000018604 24500 $$aModeling Inherent Damping in Nonlinear Dynamic Analysi

000018604 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018604 260__ $$b
000018604 506__ $$arestricted
000018604 520__ $$2eng$$aModeling of inherent damping in nonlinear dynamic analysis has generated significant interest over the past 35 years, and there is little agreement as to the approach that should be used. In most cases, it is assumed that the damping is linear, viscous, and classical, which is almost univerisally recognized as unrealistic. Additionally, a host of problems have been identified wherein unrealistic damping forces and other detrimental effects can arise. Methodologies have been forwarded for minimizing or potentially eliminating the problems, but no classical viscous damping model has been developed that is reliable in all circumstances. In this paper, issues related to modeling damping as linear and viscous are reviewed and explained through the analysis of a simple 4-story moment resisting frame. Approaches evaluated include Rayleigh damping (using full initial stiffness, partial initial stiffness, full tangent stiffness, and partial tangent stiffness), and Modal damping. With regard to tangent stiffness damping, issues related to imparted energy due to negative tangent stiffness, damping force – velocity hysteresis, and implementation with the P-Delta or corotational geometric transformations are discussed. The paper concludes with a recommendation to move away from the use of linear viscous damping, and instead to model inherent energy dissipation as nonlinear, amplitude dependent, frequency independent, and evolutionary.

000018604 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018604 653__ $$anonlinear dynamic analysis, modeling approaches, damping

000018604 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018604 720__ $$aCharney, Finley$$iLopez-Garcia, Diego$$iUgalde, David$$iHardyniec, Andrew
000018604 8560_ $$ffischerc@itam.cas.cz
000018604 8564_ $$s452577$$uhttps://invenio.itam.cas.cz/record/18604/files/181.pdf$$yOriginal version of the author's contribution as presented on USB, paper 181.
000018604 962__ $$r16048
000018604 980__ $$aPAPER