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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: High Strength Bolt Shear Connectors -Pushout Tests
Author(s): Lawrence N. Dallam
Publication: Journal Proceedings
Appears on pages(s): 767-769
Keywords: bolts;bonding strength;composite construction (concrete and steel);friction; high-strength steels;pull-out tests;reinforced concrete;research;shear connectors;static tests;steels;studs.
Abstract:Presents static pushout tests of concrete-steel specimens using high strength bolts as shear connectors. The bolts were embedded in normal weight concrete and pretensioned by the turn-of-nut method after the concrete had aged 28 days. The length of bolt embedded was 4 in. (10.16 cm) within a 6 in. (15.24 cm) slab. Standard steel washers were spot welded under the heads of the bolts prior to installation. Twelve specimens were tested, four each with bolt diameters of 1/2, 5/8, and 3/4 in. (1.27, 1.59, and 1.90 cm). Test results show very little slip between the slab and steel beam until friction is overcome. The bolts exhibited a greater useful capacity and ultimate strength than comparable studs.
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