Column-Footing Connection Evaluation of Hollow-Core Composite Bridge Columns

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Title: Column-Footing Connection Evaluation of Hollow-Core Composite Bridge Columns

Author(s): Mohanad M. Abdulazeez, Ahmed Gheni, Omar I. Abdelkarim, and Mohamed A. ElGawady

Publication: Special Publication

Volume: 327

Issue:

Appears on pages(s): 39.1-39.14

Keywords: Column-Footing Connection, Precast Columns, Composite Columns, Fiber Reinforced Polymer (FRP), Corrugated Steel Pipe, Seismic Loading, Hollow Core.

Date: 11/1/2018

Abstract:
This paper presents the seismic behavior of two large-scale hollow-core fiber-reinforced polymer-concrete-steel (HC-FCS) precast columns having two different footing connections. The precast HC-FCS column consists of a concrete shell sandwiched between an outer fiber-reinforced polymer (FRP) tube and an inner steel tube. The steel tube was embedded 635 mm (25 inches) into a reinforced concrete footing, while the outer FRP tube confined the concrete shell only i.e. it was truncated at the top surface of the footing. One connection included embedding the steel tube into the footing. The other one included using a corrugated steel pipe (CSP) embedded into the concrete footing outside the steel tube to achieve better confinement. This study showed that the connection including the CSP is deemed satisfactory and was able to develop the plastic flexural capacity of the HC-FCS column providing good ductility and energy dissipation compared with the other connection type.