| Interface performance and structural behavior of FRP reinforced concrete beams are key and complicated problem in FRP strengthened concrete. With technology of FRP reinforced concrete beams is applied in domain of the civil engineering, it attracts more and more scholars to study it.Firstly, interface stress transfer model is studied. The main affecting factors on the loading to peeling in direct-pull test are analyzed based on the selected data. The adopted dual line model is not only simple but also can show the relationship of bond-slip of interface. Based on that, expression of shearing capacity is proposed. In addition, the comparison results of calculation show well agreement with that of collected experimental data.Secondly, the flexural mechanism of FRP reinforced RC beams is analyzed. The flexural failure form of FRP reinforced RC beam is summarized, and failure reason is analyzed. Through studying collection experiment data, the main reasons of affect flexural loading and as well as their effects are analyzed; the flexural failure caused by FRP snap and concrete crush are presented, with the respective simplifications obtained from the above calculation and analysis to failure situations, it is shown that the results check well with available test results. It is studied that flexural failure caused by peeling, formula of flexural peeling failure is obtained; it is shown that the results agree well with available test results.Finally, It is studied of the shear mechanism of FRP reinforced RC beams, two failure models are analyzed concerning FRP shear-strengthened of RC beams, that are FRP snap and FRP peelings, the main reasons that affecting shear loading of FRP reinforced RC beams arc analyzed and their effects are analyzed. Through assaying, shear capacity of FRP reinforced RC beam is obtained by simply interference, formula of calculation is put forward, and it is shown that the results agree well with available test results.
|
PDF Full Text Request