Akademik Veri Yönetim Sistemi
Joint International Structural Engineering and Construction Conference, ISEC 2025 and 7th Australasia Structural Engineering Construction, ASEA-SEC-07 2025, Sydney, Avustralya, 17 - 21 Kasım 2025, cilt.12, sa.1, (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.