000011044 001__ 11044
000011044 005__ 20141205155830.0
000011044 04107 $$aeng
000011044 046__ $$k2008-10-12
000011044 100__ $$aMonti, G.
000011044 24500 $$aDesign Equations for Evaluation of Strength and Deformation Capacity for Unstrengthened and FRP Strengthened RC Rectangular Columns under Combined Biaxial Bending and Axial Load

000011044 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011044 260__ $$b
000011044 506__ $$arestricted
000011044 520__ $$2eng$$aWhen assessing the seismic performance of existing reinforced concrete buildings designed according to obsolete codes, one can identify potentially dangerous situations that could result in catastrophic failures. A typical inadequacy lies in the so-called “strong beam-weak column” situation: columns are no so strength to force plastic hinge formation in beams and, if this is extended to all columns at a given floor, can lead to the development of a soft-storey mechanism. Such weaknesses should be eliminated by upgrading all weak columns in the zones of potential formation of plastic hinges so to increase their flexural capacity and to force plastic hinge formation in the beams. With this aim one or more layers of FRP could be wrapped longitudinally along the column at the end zones. Nevertheless, the flexural strengthening can reduce the element‟s deformation capacity. This paper, starting from previous authors works propose a simplified procedure for the assessment of flexural strength and deformation capacity of rc unstrengthened and FRP strengthened reinforced concrete rectangular columns. Approximate closed form equations are developed by which the flexural strength and section ultimate curvature are evaluated as a function of the normalized acting axial load and the geometrical and mechanical section‟s parameter. The proposed approach is compared with a fibre approach.

000011044 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011044 653__ $$aRC columns, FRP–strengthening, interaction domain, biaxial bending, closed-form equations, seismic upgrade

000011044 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011044 720__ $$aMonti, G.$$iAlessandri, S.
000011044 8560_ $$ffischerc@itam.cas.cz
000011044 8564_ $$s534328$$uhttps://invenio.itam.cas.cz/record/11044/files/05-03-0209.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-03-0209.
000011044 962__ $$r9324
000011044 980__ $$aPAPER