000019349 001__ 19349
000019349 005__ 20170118182314.0
000019349 04107 $$aeng
000019349 046__ $$k2017-01-09
000019349 100__ $$aKwon, Minho
000019349 24500 $$aSeismic Performance Evaluation of Damaged RC Column Retrofitted By Gfrp-Strip Device

000019349 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019349 260__ $$b
000019349 506__ $$arestricted
000019349 520__ $$2eng$$aMany reinforced concrete (RC) buildings, which were designed and constructed with old seismic-design codes, have been seriously damaged and destructed in both destructive earthquakes and several aftershocks. Several aftershocks may be quite destructive because of the previous damage of the RC building. Therefore, demand for development of rapid-repair methods was increased to prevent possible collapse of RC building during the aftershocks. Partial or total collapse of a RC building under the earthquakes was led by the collapse of columns. Therefore, the main purpose of a seismic retrofitting method is to increase shear capacity of the RC columns. In this study, a GFRP-strip device was proposed to improve the seismic performance of damaged RC columns and was designed to consider easy installation and rapid repair. The GFRP-strip device consists of both GFRP composite strips and aluminum clip-connectors. The shape of the aluminum clip-connectors was designed in three pieces to consider easy installation and rapid repair. Three RC specimens consisted of two columns, which were designed at 75% scale of existing school buildings constructed in the 1980s in South Korea, and were constructed to evaluate the performance of the GFRP-strip device. Two of the RC specimens were pre-tested to take damage before installing the GFRP-strip device. After the pre-test damage was done, the GFRP-strip devices were installed along the plastic-hinge regions on both ends of the test columns. The experimental test results indicate several improvements in seismic performance of damaged columns. These include strength enhancement, failure mode, ductility and hysteretic energy-dissipation capacity. Thus, both the maximum strength and ductility of the retrofitted specimens were increased. Furthermore, accumulated energy-dissipation capacity of the retrofitted specimens was increased. Taking the un-retrofitted RC specimen as a control specimen, the failure behavior of the retrofitted RC specimens was changed from brittle-shear failure to ductile-flexural behavior, which was maintained until the failure of the GFRP-strip devices occurred. Finally, it is shown that the proposed GFRP-strip device developed can be used to improve the seismic performance of damaged RC columns.

000019349 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019349 653__ $$aDamaged RC column, rapid-retrofit method, GFRP-strip device

000019349 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019349 720__ $$aKwon, Minho$$iKim, Jinsup
000019349 8560_ $$ffischerc@itam.cas.cz
000019349 8564_ $$s738329$$uhttps://invenio.itam.cas.cz/record/19349/files/3444.pdf$$yOriginal version of the author's contribution as presented on USB, paper 3444.
000019349 962__ $$r16048
000019349 980__ $$aPAPER