Title: Comparison of Post-Tensioned Slabs with Banded-Uniform and Banded-Banded Tendon Arrangements

Author(s): Taye Ojo and Carin Roberts-Wollmann

Publication: Structural Journal

Volume: 119

Issue: 4

Appears on pages(s): 211-223

Keywords: banded-banded; flat plate; post-tensioned; prestressed; tendon; unbonded; uniform-banded

DOI: 10.14359/51734493

Date: 7/1/2022

Abstract:
This paper compares the flexural performance of two one-third-scale models of a two-way unbonded post-tensioned flat plate. One of the slabs had a conventional uniform-banded tendon arrangement and the other had a banded-banded tendon arrangement. The models had three bays in each direction and each bay was 10 x 10 ft (3 x 3 m). The specimens were tested using a whiffle tree system to approximate a uniformly distributed load, and were loaded to service and factored load multiple times, then loaded to failure. The performance of the banded-banded specimen was very similar to the uniform-banded specimen at service and factored load. The failure loads for the banded-banded and uniform-banded specimens were 310 and 321 lb/ft2 (14,840 and 15,380 N/m2) of total load, respectively—considerably higher than the design factored load of 197 lb/ft2 (9430 N/m2).