Effects of Footing Connections of Precast Hollow-Core Composite Columns

Abstract

This paper presents the seismic behavior of the footing connection of a large-scale hollow-core fiber-reinforced polymer-concrete-steel (HC-FCS) precast column. The precast HC-FCS column consists of a concrete wall sandwiched between an outer fiber-reinforced polymer (FRP) tube and an inner steel tube. The column had an outer diameter of 610 mm (24 inches) and a height-to-diameter ratio of 4.0. The steel tube was embedded into a reinforced concrete footing with an embedded length of 1.6-1.8 times the steel tube diameter, while the outer FRP tube confined the concrete and rested on the top of the footing level. A new footing connection including an embedded corrugated steel pipe was proposed into this study. The precast column was inserted into the footing. A high strength grout was poured in the connection between the column and the footing. The seismic performance of the precast HC-FCS column with this footing connection type is compared with previous experimental work. This study shows that this type of connection assembly is deemed satisfactory by developing the whole capacity of such columns, and providing excellent ductility with inelastic deformation capacity by alleviating the damage at high lateral drift.

Meeting Name

Transportation Research Board (TRB) 96th Annual Meeting (2017: Jan. 8-12, Washington, DC)

Department(s)

Civil, Architectural and Environmental Engineering

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2017 Transportation Research Board (TRB), All rights reserved.

Publication Date

12 Jan 2017

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