000009762 001__ 9762
000009762 005__ 20141205153151.0
000009762 04107 $$aeng
000009762 046__ $$k2008-10-12
000009762 100__ $$aColajanni, Piero
000009762 24500 $$aShear Strength Degradation Induced by Seismic Action in R.C. Columns: Effects on Push-Over Analisys

000009762 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009762 260__ $$b
000009762 506__ $$arestricted
000009762 520__ $$2eng$$aUnfortunately, most of the interaction models have been formulated for monotonic increments of the actions. Therefore they don't take into account the effect of strength degradation due to external cyclic actions induced by the earthquake. Recently, the authors extended a model for N-M-V interaction domain evaluation of r.c. elements having rectangular cross-sections, already formulated for static loads, to the case of seismic actions. The new model is obtained by limiting the range of variability of the deviation angle between the directions of the stressfields and the cracks inclinations, as a function of the amplitude of the cyclic actions. In this paper the model is reformulated for r.c. elements having circular cross-sections. The evaluation of resistance domains for concrete bridge piers having current structural configuration highlight the increment of the risk level induced by shear strength degradation due to cyclic action. Lastly, a numerical example on actual motorway viaduct piers, where extensive experimental tests have been made for material characterization, is developed

000009762 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009762 653__ $$ar.c. circular section, N-M-V domains, plastic approach, cyclic degradation.

000009762 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009762 720__ $$aColajanni, Piero$$iRecupero, A.
000009762 8560_ $$ffischerc@itam.cas.cz
000009762 8564_ $$s193182$$uhttps://invenio.itam.cas.cz/record/9762/files/14-0213.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 14-0213.
000009762 962__ $$r9324
000009762 980__ $$aPAPER