000019317 001__ 19317
000019317 005__ 20170118182310.0
000019317 04107 $$aeng
000019317 046__ $$k2017-01-09
000019317 100__ $$aYurdakul, Ozgur
000019317 24500 $$aExperimental Investigation of Substandard RC Beam-Column Joints Retrofitted With External Post-Tension Rods

000019317 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019317 260__ $$b
000019317 506__ $$arestricted
000019317 520__ $$2eng$$aThe efficiency of the proposed strengthening method using externally applied post-tension rods in reinforced concrete external beam-column joints, which do not comply with any code requirements, is investigated. Five full-scale specimens were tested in the laboratory. They have specific deficiencies resulting from lack of shear reinforcement in the joint and poor material properties including low strength concrete and the presence of plain round reinforcement bars. While all specimens were built with column and in plane beam, one of the tested specimens consists of transverse beam to demonstrate the applicability of presented retrofit technique. All specimens were subjected to cyclic quasi-static loading up to 8% drift ratio to observe different levels of structural damage. Two post-tension rods, which were mounted diagonally at each side of the joint, are utilized as a local retrofit technique. The reference specimen displayed a brittle behavior with the concentration of shear cracks mostly in the joint while the rest of the RC components were almost in their elastic range. The ultimate lateral load capacity was increased considerably for all retrofitted specimens. However, a brittle type of failure mechanism was observed such as joint shear failure or beam-joint failure in the three retrofitted specimens. A relatively ductile response was observed in the specimen with transverse beam, although the axial force in the post-tension rods was the same with the specimens without transverse beam. After testing all specimens, it is found that the lateral force capacities of the beam-column assemblies can be improved up to code requirements by the proposed retrofitting method.

000019317 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019317 653__ $$apost-tension; beam-column joint; seismic retrofit; low strength concrete; plain bar

000019317 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019317 720__ $$aYurdakul, Ozgur$$iAvsar, Ozgur
000019317 8560_ $$ffischerc@itam.cas.cz
000019317 8564_ $$s1863365$$uhttps://invenio.itam.cas.cz/record/19317/files/3366.pdf$$yOriginal version of the author's contribution as presented on USB, paper 3366.
000019317 962__ $$r16048
000019317 980__ $$aPAPER