Title:
Banding Together to Reach Out
Author(s):
Douglas P. Gonzalez, Michael W. Hopper, and Carol Hayek
Publication:
Concrete International
Volume:
39
Issue:
10
Appears on pages(s):
23-29
Keywords:
design, tendon, concrete, construction
DOI:
10.14359/51701156
Date:
10/1/2017
Abstract:
To create a perimeter band of free-flowing workspaces with maximal views of the surrounding landscape at the Novartis Oncology Research Building in East Hanover, NJ, the designers significantly set back the columns from the façade, resulting in long-span cantilevers and large, column-free expanses. The challenges with the quantity and density of a bonded post-tensioning system necessary to meet performance requirements could only be met through open, creative, and precise collaborative efforts between the owner, builders, manufacturers, installers, and designers.
Related References:
1. Nilson, A.H., Design of Prestressed Concrete, second edition, John Wiley & Sons, Inc., New York, 1987, pp. 346-347.
2. Aalami, B.O., “Deflection of Concrete Floor Systems for Serviceability,” ADAPT Corporation, Redwood City, CA, 2008, 28 pp.
3. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-05) and Commentary (ACI 318R-05),” American Concrete Institute, Farmington Hills, MI, 2005, Ch. 9, Par. R9.5.2.5, p. 113.
4. “PTI DC20.9-11: Guide for Design of Post-Tensioned Buildings,” Post-Tensioning Institute, Farmington Hills, MI, 2011, 73 pp.
5. ACI Committee 423, “Recommendations for Concrete Members Prestressed with Unbonded Tendons (ACI 423.3R-05),” American Concrete Institute, Farmington Hills, MI, 2005, 21 pp.
6. Kelley, G.S., “Prestress Losses in Post-Tensioned Structures,” PTI Technical Notes, No. 10, Sept. 2000, 6 pp.
7. “PTI M55.1-12: Specification for Grouting of Post-Tensioned Structures,” Post-Tensioning Institute, Farmington Hills, MI, 2012, 60 pp.