000010429 001__ 10429
000010429 005__ 20141205155726.0
000010429 04107 $$aeng
000010429 046__ $$k2008-10-12
000010429 100__ $$aKam, W.Y.
000010429 24500 $$aSelective Weakening Techniques for Retrofit of Existing Reinforced Concrete Structures

000010429 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010429 260__ $$b
000010429 506__ $$arestricted
000010429 520__ $$2eng$$aThis paper presents the conceptual development and the preliminary analytical-experimental results of a counter-intuitive approach for the seismic retrofit and rehabilitation of older reinforced concrete buildings, referred to as selective weakening (SW). The basis of a SW strategy is to modify the inelastic mechanism towards a more desirable mechanism by first weakening selected regions of the structure for protection against brittle failure mechanism. Subsequently, if necessary, the structure is further upgraded to the desired strength/stiffness/ductility and energy dissipation capacity. Different levels of performance can be achieved, from collapse prevention to damage control. The feasibility of alternative techniques to implement a SW strategy is first conceptually discussed for structural walls, precast hollowcore floors and reinforced concrete frame systems. Focus is then given to the implementation of SW to the retrofit of exterior beam column (bc) joints with substandard details. The mechanics and effectiveness of partial SW of the beam within an exterior bc joint subassembly is numerically investigated using a 3D finite element micro-plane model. Finally, the global behaviour of a prototype frame prior and after a SW retrofit is investigated using non-linear time history analyses.

000010429 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010429 653__ $$a

000010429 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010429 720__ $$aKam, W.Y.$$iPampanin, S.
000010429 8560_ $$ffischerc@itam.cas.cz
000010429 8564_ $$s1424570$$uhttps://invenio.itam.cas.cz/record/10429/files/05-03-0074.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-03-0074.
000010429 962__ $$r9324
000010429 980__ $$aPAPER