Structural Evaluation of Scarf Connections With Epoxy Mortar Cushioning

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Title: Structural Evaluation of Scarf Connections With Epoxy Mortar Cushioning

Author(s): Alfred Bishara and Wei-Lee Shia

Publication: Journal Proceedings

Volume: 66

Issue: 11

Appears on pages(s): 916-919

Keywords: beams (supports) ; bolted connections;columns (supports) ; compressive strength; connections;epoxy resins; fasteners; flexural strength; frames; mortars (material) ; precast concrete;research;scarf connections;stiffness;ultimate strength.

Date: 11/1/1969

Abstract:
Strength and structural behavior of scarf connections with epoxy-sand mortar cushioning was experimentally investigated in flexural members and members subject to eccentric compression. Connections with nonprestressed bolts and connections with U-ties replacing the bolts were compared. It was found that the use of epoxy-sand mortar as a cushioning material seals the point, prevents slip between the two components of the scarf connection, and offers considerable time saving due to the early developed strength. The tied connections gave results comparable to those of the nonprestressed bolted connections. Based on observed behavior and failure criteria, critical sections are defined and methods for design of such connections are presented.