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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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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: Restraint Effectiveness in Unbonded Tendons for Prestressed Masonry
Author(s): D. D. Stierwalt and H. R. Hamilton, III
Publication: Structural Journal
Appears on pages(s): 840-848
Keywords: masonry; post-tensioning; tendon
Abstract:Currently, the Masonry Standards Joint Committee (MSJC) does not provide any guidance on the design of intermittent restraint systems. Post-tensioned masonry is most cost-effective when the amount of restraint necessary to provide adequate performance is minimized. This paper presents an analytical approach to determining the force transferred between the restraint and the tendon. In addition, experimental results of component testing on restraints are presented. Specimens tested include restraints formed by filling cells with mortar and grout as well as the use of a bar positioner. Analytical methods to predict the restraint capacity are also presented and compared with the results of the component testing. Finally, design provisions are suggested along with a design example problem.
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