Abstract

Info

Title:: Compression Performance of GFRP Reinforced Concrete Columns Under Seawater Environment

Author(s):: SUN Li; YANG Ze-yu; JU Li-hong; ZHANG Chun-wei; School of Civil Engineering, Shenyang Jianzhu University

Keywords:: GFRP reinforcement; concrete column; seawater environment; compression performance

Abstract:: The tests with a new point of view and real corrosion conditions were carried out. First, the effect of marine environment on the concrete material was eliminated through the corrosion test of concrete in the marine environment. Then the corrosion test of the GFRP reinforcement was initiated. The GFRP tendons with different corrosion time were lashed, formed and poured into concrete column and the related tests were carried out. According to the experimental results of the related mechanics test, the ultimate bearing capacity, failure mode of concrete members before and after corrosion, and the changing status of various properties of reinforcement body after corrosion were compared. The results show that the artificial high concentration seawater solution has little influence on mechanical properties of concrete materials. It is essential that overcoming the influence of concrete protection layer on traditional corrosion test. Under the condition of inner tendons corroded for 180 days, the retention rate of ultimate bearing capacity of reinforced concrete column reduces from 100% to 70.2% for about 29.8%. The retention rate of ultimate bearing capacity of GFRPreinforced concrete column reduces from 100% to 86.5% for about 13.5%. It can be found from the experimental results that the compression components in seawater, GFRP tendons are better than rebar in performance and value of application.