Missouri S&T Scholar's Mine Research RepositoryMissouri S&T Research
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Splice Length of #8 GFRP Internal Reinforcement Bars - Year 2
When reinforcement is spliced together within concrete it is necessary to overlap the bars long enough for tensile stresses in one bar to be fully transferred to other bars without inducing a pullout failure in the concrete. Load transfer occurs between the bars and the concrete by bond stresses. Regarding ACI 440 requirements for Class B bars the lap splice length ought to be 1.6ld. In order to investigate these lap splice length requirements for different bar sizes made of glass fiber reinforced polymers (GFRP), this research program was divided in two phases. During the first and second phases #4 and #8 GFRP bars were investigated, respectively. Phase 1 research results indicate that the specified lap splice lengths for #4 GFRP bars are conservative, whereas Phase 2 results indicate that for #8 GFRP bars specifications are within those limits extrapolated from this research program.