Contribution of Steel Casing to Single-Shaft Foundation Structural Resistance

摘要

Bridges often are constructed with a single, enlarged, shaft foundation supporting a column, which in many cases is constructed with a permanent steel casing. When the structural resistance of the shaft is calculated in the design process, the steel casing typically is ignored and only the reinforced concrete section is considered. Although bridge designers would like to account for the added structural resistance of the steel casing, they lack research data on when the steel casing and concrete inner core act as a composite section.