000010236 001__ 10236
000010236 005__ 20141205155706.0
000010236 04107 $$aeng
000010236 046__ $$k2008-10-12
000010236 100__ $$aHo, J.C.M.
000010236 24500 $$aFlexural Ductility Assessment and Concurrent Flexural Strength and Ductility Design of Reinforced Concrete Beams

000010236 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010236 260__ $$b
000010236 506__ $$arestricted
000010236 520__ $$2eng$$aDue to its higher strength-to-weight ratio, high-strength concrete is increasingly adopted in the construction of tall buildings and long span bridges. However, apart from better utilising its strength potential, there was only little attention paid to the ductility design of HSC members. Currently, the ductility design of HSC beams rely on some deemed-to-satisfy rules to provide a nominal level of ductility. The main drawback of this method is that it would not provide the same level of ductility, and most importantly much lower ductility, to HSC beams. This is dangerous because the lower ductility in beams would disallow the moment redistribution to occur during earthquake, and eventually lead to brittle collapse. In this regard, a new method that would enable the design of HSC beams with a minimum ductility not less than that provided in the past for normal-strength concrete beams is advocated in this paper. With this fixed minimum ductility set as a nominal requirement in the beams design, a maximum limit of tension steel ratio or neutral axis depth is imposed. These limits are subsequently evaluated using a new method of nonlinear moment-curvature analysis taking into account the stress-path dependence of steel reinforcement. The associated flexural strength that can be designed while achieving the recommended minimum ductility are also evaluated and presented in the form of design charts for practical application.

000010236 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010236 653__ $$abeams, ductility, flexural strength, high-strength concrete

000010236 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010236 720__ $$aHo, J.C.M.$$iKwan, A.K.H.
000010236 8560_ $$ffischerc@itam.cas.cz
000010236 8564_ $$s246841$$uhttps://invenio.itam.cas.cz/record/10236/files/05-03-0186.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-03-0186.
000010236 962__ $$r9324
000010236 980__ $$aPAPER