000020195 001__ 20195
000020195 005__ 20170118182359.0
000020195 04107 $$aeng
000020195 046__ $$k2017-01-09
000020195 100__ $$aKaynia, Amir
000020195 24500 $$aNonlinear Site Response Model With Improved Damping and Strain Softening

000020195 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000020195 260__ $$b
000020195 506__ $$arestricted
000020195 520__ $$2eng$$aThis paper presents the mathematical formulation of the one-dimensional nonlinear seismic site response program QUIVER, which contains two different analysis options. The first option performs a nonlinear site response analysis with a hyperbolictype backbone curve and Davidenkov’s model (1938) to describe the unloading-reloading behavior. The Davidenkov (1938) model gives narrower hysteresis loops than the traditional Masing rules, which result in less damping at large shear strains that more accurately reflects laboratory tests. In addition, the hyperbolic model can accurately estimate both small strain nonlinearity and a given shear strength at failure. The second option performs a nonlinear site response analysis using a viscoelastic linear loading-unloading model with a tri-linear model for strain softening post peak strength. The inclusion of a model for strain softening in Quiver is unique and not available in most seismic site response programs. Finally, this paper compares results from the first option with results from another commonly used one-dimensional site response program using ground motions with forward directivity, and demonstrates the effects and importance of strain softening on site response analyses.

000020195 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000020195 653__ $$aseismic site response; strain softening; Davidenkov model; forward directivity

000020195 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000020195 720__ $$aKaynia, Amir$$iCarlton, Brian
000020195 8560_ $$ffischerc@itam.cas.cz
000020195 8564_ $$s922624$$uhttps://invenio.itam.cas.cz/record/20195/files/721.pdf$$yOriginal version of the author's contribution as presented on USB, paper 721.
000020195 962__ $$r16048
000020195 980__ $$aPAPER