000010718 001__ 10718
000010718 005__ 20141205155756.0
000010718 04107 $$aeng
000010718 046__ $$k2008-10-12
000010718 100__ $$aLignola, Gian Piero
000010718 24500 $$aAnalysis of Reinforced Concrete Hollow Piers Behavior: Benefits of FRP Confinement

000010718 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010718 260__ $$b
000010718 506__ $$arestricted
000010718 520__ $$2eng$$aReliable stress-strain behavior of concrete is necessary particularly when a member is subjected to combined bending and axial load and confinement effects should be accounted for. A unified theory for confinement of circular hollow sections is proposed herein, that can be extended to the case of solid and noncircular sections. The main aim of the model is to trace step-by-step the evolution of the three dimensional stresses in confined concrete and confining devices (i.e. FRP externally bonded jackets). The iterative model is able to estimate confinement effectiveness and to plot stress-strain relationships, which are different in the case of solid and hollow sections. Through the proposed improved model, a simplified closed form solution has been also derived to directly determine ultimate confined concrete properties and stress-strain curves. At present, theoretical results based on the proposed concrete circular hollow sections confinement model, in satisfactory agreement with the experimental data available in scientific literature, show that FRP jacketing can enhance the ultimate load and ductility significantly, also in the case of hollow concrete cross sections.

000010718 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010718 653__ $$aModeling, Hollow sections, Concrete confinement, Nonlinear analysis

000010718 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010718 720__ $$aLignola, Gian Piero$$iProta, Andrea$$iManfredi, Gaetano$$iCosenza, Edoardo
000010718 8560_ $$ffischerc@itam.cas.cz
000010718 8564_ $$s641301$$uhttps://invenio.itam.cas.cz/record/10718/files/05-02-0057.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-02-0057.
000010718 962__ $$r9324
000010718 980__ $$aPAPER