Application of Strut-and-Tie Model in Structural Concrete Repair

摘要

The subject of this paper is the structural assessment and repair of multiple large pile caprnfoundations. A combination of high temperatures during early hydration and inadequate steelrnreinforcement resulted in large cracking that compromised the structural integrity of the caps to thernextent that repair and modificationwere necessary. New pile caps, placed on top of the existingrncaps, were designed to support the existing loads and superimposed loads that would result from arnfuture buildout. The new pile caps were designed in accordance with the strut-and-tie provisions ofrnthe 2002 ACI 318 Code and constructed with a high-strength, self-compacting concrete.