000012228 001__ 12228
000012228 005__ 20141205160032.0
000012228 04107 $$aeng
000012228 046__ $$k2008-10-12
000012228 100__ $$aYooprasertchai, E.
000012228 24500 $$aSeismic Retrofitting of Low-Rise Nonductile Reinforced Concrete Buildings by Buckling-Restrained Braces

000012228 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000012228 260__ $$b
000012228 506__ $$arestricted
000012228 520__ $$2eng$$aAn experimental study was carried out to examine the applicability of bucking-restrained braces (BRB) to seismic retrofit low-rise, gravity-load-designed, concrete frame buildings. In the first phase of the study, a simple but effective BRB made from encasing an unbonded flat bar section with grout fill in a hollow square-section steel tube was developed through a series of quasi-static cyclic loading tests. The original design of BRB test specimens was based on available design guidelines and past research reports. However, they were found to perform very poorly due to the occurrence of several unexpected failures in or near the end of yielding zone of BRB specimens. After correcting those details, the final BRB specimen was able to successfully yield in both axial tension and compression up to ductility ratio of approximately 16. In the second phase of the study, an assemblage of a reinforced concrete column with non-seismic detailing and a diagonally arranged BRB was tested under quasi-static cyclic load. The test results showed that the BRB effectively yielded at a lateral drift of about 0.3%, which is much lower than the drift at which the column reached the peak strength (about 1 %). The force-deformation of the assemblage displayed ductile stable hysteretic loops from small to large lateral drift levels, without any sign of degradation, until the complete failure of the column at the drift of 2.5%. The results clearly demonstrated the potential of BRB in seismic retrofitting of non-ductile, low-rise concrete frame buildings.

000012228 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000012228 653__ $$abuckling-restrained braces, seismic retrofitting, quasi-static cyclic loading test, nonductile buildings, energy dissipation.

000012228 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000012228 720__ $$aYooprasertchai, E.$$iWarnitchai, P.
000012228 8560_ $$ffischerc@itam.cas.cz
000012228 8564_ $$s660090$$uhttps://invenio.itam.cas.cz/record/12228/files/05-03-0213.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-03-0213.
000012228 962__ $$r9324
000012228 980__ $$aPAPER