This research presents an experimental study with GFRP bars from three manufacturers, each having different bar textures (silica coated with helical wraps, silica coated and ribbed) used as post-installed (epoxy and cementitious adhesive) and cast-in-place reinforcement. Twenty test specimens were constructed and tested under static load. A test specimen was composed of two identical vertical elements, which were anchored into the base of the specimen using post-installed GFRP bars. The variables tested among different specimens included: concrete compressive strength (3 and 6 ksi), embedment length of GFRP bars (6 and 11.5 in.), and size of the post-installed GFRP bars (#4, #6, and #8). Concrete breakout was the only failure mode in all of the specimens with post-installed GFRP. Bond strengths and peak applied loads improved by increasing concrete strengths and embedment depths. The larger diameter bars (#6 and #8) showed a loss of bond strength compared to #4 bars.
University of Minnesota M.S. thesis.June 2018. Major: Civil Engineering. Advisors: Benjamin Dymond, Rania Al-Hammoud. 1 computer file (PDF); viii, 158 pages.
Bajwa, Muhammad Shahraiz.
Bond Behavior of Post-Installed GFRP Bars in Structural Connections.
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