Title: Performance of Concrete-Filled Fiber-Reinforced Polymer Tube Stubs Subjected to Sustained Axial Load and Long- Term Seawater Corrosion
Author(s): Song Wang and Mohamed A. ElGawady
Publication: Materials Journal
Appears on pages(s): 13-26
Keywords: concrete-filled fiber-reinforced polymer tubes (CFFT); durability; seawater; sustained load
In recent decades, concrete-filled fiber-reinforced polymer tube (CFFT) columns have gained increasing popularity in bridge construction as an alternative to conventional reinforced concrete columns. CFFT columns have excellent structural performance, which is attributed to the superior properties of the fiber-reinforced polymer (FRP) tubes. Furthermore, using FRP tubes eases the construction of CFFT columns. However, one obstacle hindering the greater acceptance of FRP as a common construction material in civil infrastructure application is the susceptibility of FRP to degradation during long-term exposure to a severe environment. The purpose of this study is to investigate the durability of CFFT columns subjected to seawater corrosion, which is the scenario for seashore bridges. CFFT stubs were immersed in simulated seawater with two different elevated temperatures for up to 450 days. Sustained axial loads were also applied to the stubs to simulate the real-life service load. Compression tests and hoop tensile tests were carried out on both pre- and post-conditioned specimens.