Latest Developments in QC for Bond of Prestressing Steel to Concrete-Reference-Cited by-同舟云学术

Latest Developments in QC for Bond of Prestressing Steel to Concrete

Published:2012 Issue: Volume: Page:
ISSN:2221-3791
Container-title:IABSE Congress Reports
language:
Short-container-title:

Author:

Osborn Andrew E. N.,Hong Sunyoung

Abstract

<p>For prestressed concrete structures to perform, bond of prestressing steel strands to the surrounding concrete (a.k.a. strand bond) is essential. Poor bond results in excessive transfer and development lengths, thereby reducing the end region shear and flexural strengths of prestressed concrete mem- bers. Shear failures of flexural members discovered in the 1990s were later determined to be in- itiated by a failure of strand bond. Two such projects are described herein.</p><p>The National Cooperative Highway Research Program (NCHRP)funded two recent studies asso- ciated with strand bondthat resulted in the development of standardized tests for strand bond. Re- cent research funded by Precast/Prestressed Concrete Institute (PCI)has focused on development of simple quality control tests that can be run in the precast concrete plant. These tests help assure that the prestressing strands used in our structures havereliable, predictable strand bond resulting in sa- tisfactory performance of the prestressed concrete structures.</p>

Publisher

International Association for Bridge and Structural Engineering (IABSE)

Reference14 articles.

1. Janney, J. R., "Nature of Bond in Pre-Tensioned Prestressed Concrete," Journal of the American Concrete Institute, 118 Proceedings. Vol. 50, No 9 (May, 1954), pp. 717-736.

2. ACI Committee 318. Commentary on Building Code Requirements for Reinforced Concrete (318-63), Publication SP-10, American Concrete Institute (ACI), Farmington Hills, Michi- gan. 1963, 100 pp

3. AASHTO. Standard Specifications for Highway Bridges, 13th Edition, American Associa- tion of State Highway and Transportation Officials Washington, D.C. 1983

4. Cousins, T.E., Johnston, D.W., and Zia, P., "Bond of Epoxy Coated Prestressing Strand, FHWA NNC/87-005", Center for Transportation Engineering Studies, Department of Civil Engineering, North Carolina State University, Dec. 1986, 191 pp.

5. U.S. Department of Transportation, "Prestressing Strand for Pretension Applications – De- velopment Length Revisited", Federal Highway Administration Memorandum, Oct. 26, 1988.