Title: Short-and Long-Term Performance of Hollow-Core FRP-Concrete-Steel Columns

Author(s): ElGawady

Publication: Web Session

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Date: 10/17/2021

Abstract:
This presentation reports the short and long term performance of hollow-core fiber-reinforced polymer (FRP)-concrete-steel (HC-FCS) bridge columns. The typical HC-FCS column consists of a concrete shell sandwiched between an outer FRP tube and an inner steel tube. The HC-FCS column represents a compact engineering system; the steel and FRP tubes act together as stay-in-place formworks. The steel tube acts as a flexural and shear reinforcement. The presentation reports the static cyclic and dynamic response of twelve HC-FCS columns. Furthermore, the durability response of the columns after being subjected to different severe weather environment will be reported as well. The HC-FCS columns exhibited high lateral drift reaching 15.2% and fail gradually due to concrete crushing and local steel tube buckling, followed by FRP rupture. Analytical and numerical models predicted quite well the performance of the columns.