Title:
Tips for Post-Tensioning—Part II
Author(s):
Donald Kline
Publication:
Concrete International
Volume:
38
Issue:
10
Appears on pages(s):
40-44
Keywords:
tendon, load, prestress, fold
DOI:
10.14359/51689331
Date:
10/1/2016
Abstract:
In February 1988, Concrete International published Dan Falconer’s article on design and detailing of unbonded post-tensioned parking structures. In the current article, the topic is broadened by providing tips for designing of post-tensioned two-way slabs in buildings. Load balancing, minimum and maximum average prestress, tendon profiles, drop panels, design software, and restraint to shortening are discussed.
Related References:
1. Falconer, D.W., “Tips for Post-Tensioning,” Concrete International, V. 10, No. 2, Feb. 1988, pp. 36-39.
2. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary (ACI 318R-14),” American Concrete Institute, Farmington Hills, MI, 2014, 519 pp.
3. Joint ACI-ASCE Committee 423, “Specification for Unbonded Single-Strand Tendon Materials (ACI 423.7-14),” American Concrete Institute, Farmington Hills, MI, 2014, 8 pp.
4. Lin, T.Y., “Load-Balancing Method for Design and Analysis of Prestressed Concrete Structures,” ACI Journal Proceedings, V. 60, No. 6, June 1963, pp. 719-742.
5. ACI Committee 362, “Guide for the Design and Construction of Durable Concrete Parking Structures (ACI 362.1R-12),” American Concrete Institute, Farmington Hills,= MI, 2012, pp. 13-14.
6. “Post-Tensioning Manual,” sixth edition, Post-Tensioning Institute, Farmington Hills, MI, 2006, 354 pp.
7. Bondy, K., “The Use of Drop Caps to Reduce Flexural Reinforcement in Two-Way Post-Tensioned Slabs,” FAQ No. 10, Post-Tensioning Institute, Farmington Hills, MI, March 2010, 2 pp.
8. Bommer, A., “Complete Secondary (Hyperstatic) Effects,“ PTI Journal, V. 2, No. 1, Jan. 2004, pp. 53-64.
9. “Guide for Design of Post-Tensioned Buildings (PTI DC20.9-11),” Post-Tensioning Institute, Farmington Hills, MI, 2011, 73 pp.
10. Aalami, B.O., and Barth, F.G., Restraint Cracks and their Mitigation in Unbonded Post-Tensioned Building Structures, Post-Tensioning Institute, Farmington Hills, MI, 1988, 49 pp.