000011648 001__ 11648
000011648 005__ 20141205155932.0
000011648 04107 $$aeng
000011648 046__ $$k2008-10-12
000011648 100__ $$aShin, Moochul
000011648 24500 $$aApplication of Shape Memory Alloys in the Seismic Retrofitting of Bridge Columns

000011648 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011648 260__ $$b
000011648 506__ $$arestricted
000011648 520__ $$2eng$$aThis analytical study focuses on investigating a new active confinement retrofitting technique for reinforced concrete bridge columns using pre-strained shape memory alloy (SMA) hoops. The shape memory feature of SMAs is sought in this study to apply large lateral confining pressure on the columns in an easy and reliable technique. A finite element model is developed for a column adopted from the literature and retrofitted with SMA hoops and CFRP wraps. The compression stress-strain behaviors of passively and actively confined concrete using CFRP wraps and SMA hoops, respectively are implemented in the finite element model. The retrofitted column behavior is studied under displacement-controlled and seismic excitations. The results of the cyclic loading analysis indicates an increase in the SMA retrofitted column strength by approximately 34% compared to that of the CFRP retrofitted column. The seismic analysis results show that the early increase in the concrete strength associated with using SMA hoops results in a maximum and residual drift reduction of approximately 12% and 50%, respectively compared to the drifts obtained by using conventional CFRP wraps.

000011648 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011648 653__ $$aShape memory alloys, Seismic retrofitting, Bridges, Concrete, Confinement

000011648 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011648 720__ $$aShin, Moochul$$iAndrawes, Bassem O.
000011648 8560_ $$ffischerc@itam.cas.cz
000011648 8564_ $$s394552$$uhttps://invenio.itam.cas.cz/record/11648/files/11-0057.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 11-0057.
000011648 962__ $$r9324
000011648 980__ $$aPAPER