Show simple item record

dc.contributor.authorGyebi, O.en_US
dc.contributor.authorDasgupta, G.
dc.date.accessioned2010-07-29T13:29:03Zen_US
dc.date.accessioned2010-08-17T17:07:26Zen_US
dc.date.accessioned2014-02-10T20:27:59Z
dc.date.available2010-07-29T13:29:03Zen_US
dc.date.available2010-08-17T17:07:26Zen_US
dc.date.available2014-02-10T20:27:59Z
dc.date.issued1987en_US
dc.identifier87-0005en_US
dc.identifier.govdocPB88-213764en_US
dc.identifier.urihttp://hdl.handle.net/10477/630en_US
dc.description.abstractA direct comparison of the rheological behavior of a mass supported by a complex spring and a mass supported by a spring-dashpot arrangement provides a means of establishing a relationship between material damping in the frequency domain and the frequency dependent Q (omega). For the special case where Q (omega) is constant over a given frequency range, the expansion of Q-1 (omega), i.e., the measure of energy dissipation per cycle, into a Laurent Series yields a set of damping coefficients whose values are determined by minimizing the mean square error of the series over the prescribed frequency range. The resulting damping expression is used in conjunction with an elastoplastic constitutive matrix in finite element discretization to produce a viscoplastic model suitable for a direct step by step time integration. The proposed model is very convenient for use in finite element descretization for the analyses of earthquake, blast, shock, and other soil-structure interaction problems involving cyclic loading.en_US
dc.description.sponsorshipColumbia Universityen_US
dc.format.extent166en_US
dc.titleA Finite Element Formulation for Nonlinear Viscoplastic Material Using a Q Modelen_US


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record