Akademik Veri Yönetim Sistemi
Proceedings of International Structural Engineering and Construction, ASEA-SEC-7, Sydney, Avustralya, 17 - 21 Kasım 2025, cilt.12, sa.1, ss.1-6, (Tam Metin Bildiri)
Post-tensioning technology can be effectively utilized in reinforced concrete beams of
long-span moment-resisting frame systems. These frames are typically designed using
the structural behavior factors specified for conventional reinforced concrete systems,
assuming comparable ductility performance. This study presents an experimental
investigation aimed at evaluating the seismic behavior of post-tensioned beams. To this
end, a representative exterior beam-to-column joint was selected from a code-compliant
prototype frame and used to fabricate 1:2 scaled test specimens. The primary variables
in the experimental program were the presence of prestressing and the ratio of mild steel
reinforcement. Key response metrics including base shear–lateral displacement,
moment–curvature, crack width, energy dissipation, and stiffness degradation were
recorded and analyzed. Accordingly, it was understood that post-tensioning provided
better control of crack formation and gradual stiffness degradation compared with
conventional reinforced concrete due to its self-centering capability and brittle nature.
However, this system exhibited limited ductility. To compensate for this deficiency, the
prestressing steel should be supplemented with an optimal amount of mild steel.