Seismic performance of post-tensioned cast-in-place reinforced concrete structures based on component testing

Date

2026-03-15

Author

Tuncer, Ertürk
Karageyik, Can
Canbay, Erdem
Muka, Norgen
Binici, Barış

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Post-tensioned buildings offer advantages such as lighter concrete frames, lower seismic demands, and greater resistance to concentrated loads. Although extensive research was conducted on post-tensioned precast beam-to-column joints, the seismic response of post-tensioned cast-in-place reinforced concrete connections has not been thoroughly investigated. In this study, the seismic performance of such test sub-assemblages was experimentally examined together with numerical simulations of reinforced concrete frames consisting of post-tensioned beams. In this scope, the main test variables were selected as mild steel ratio, tendon area, and connection type. Experimental results were studied by comparing the base shear-lateral displacement, moment-curvature, crack width, dissipated energy, equivalent viscous damping ratio, and stiffness degradation relations of the test specimens. Following the calibration between experimental data and computational models, non-linear time-history analyses were performed on a prototype building to specify seismic response modification factors as a function of drift ratio demands. It was found that use of a smaller response modification factor than that designated for ductile moment-resisting reinforced concrete frames may be more appropriate for the seismic design of such systems.

Subject Keywords

Beam, Post-tension, Reinforced concrete, Response modification factor, Seismic design

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=105032074613&origin=inward
https://hdl.handle.net/11511/118949

Collections

Department of Civil Engineering, Article