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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: Stress-Strain Curves for Unconfined and Confined Concrete Masonry
Author(s): M. J. N. Priestley and D. M. Elder
Publication: Journal Proceedings
Appears on pages(s): 192-201
Keywords: compressive strength; concrete blocks; confined concrete; deformation;dynamic tests; earthquakes; masonry; reinforced masonry, stress-strain relationships;structural analysis.
Abstract:An experimental investigation of the compression stress-strain characteristics of grouted concrete masonry prisms is described. Variables included block width, longitudinal reinforcement within the grout flues, and presence of thin stainless steel confining plates within the mortar bed in an attempt to improve falling branch characteristics and ultimate compression strain. Testing was carried out at low strain rates, representative of conventional testing practice, and at high strain rates approximating those expected under seismic conditions. It is shown that confining plates were effective in modifying the failure mechanism and improving ductility of the stress-strain relationship and that high strain rates resulted in a small but significant increase in prism strength. Average curves obtained from the test program agreed well with a modified form of the Kent-Park curve for confined reinforced concrete prisms.
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