Title:
High Strength Bolt Shear Connectors -Pushout Tests
Author(s):
Lawrence N. Dallam
Publication:
Journal Proceedings
Volume:
65
Issue:
9
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.
DOI:
10.14359/7511
Date:
9/1/1968
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.