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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Experiments on Continuous Unbonded Post-Tensioned Beams with 2400 MPa (350 ksi) Strands
Author(s): Kyungmin Kim and Thomas H.-K. Kang
Publication: Structural Journal
Appears on pages(s): 125-136
Abstract:Experiments on seven two-span unbonded post-tensioned beams were conducted under four-point static loading conditions. Variables considered included: strand type (nominal tensile strength); tendon drape (height of tendon profile); and magnitude of prestress. Experimental emphasis was placed on the applicability of using higher-strength 2400 MPa (350 ksi) strands instead of ordinary 1860 MPa (270 ksi) strands in unbonded post-tensioned beam members. Observed results revealed that specimens with 2400 MPa (350 ksi) tensile strength 15.2 mm (0.6 in.) diameter strands developed equivalent tendon stress increment, load-carrying capacity, and flexural ductility while at the ultimate limit state having earlier and wider plastic hinge.
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