Study On Shear Capability Of Rc Beam Reinforced With Frp

Reinforced concrete structure is a familiar type of structure. There are two kinds of lack of bearing capacity for concrete beam: lack of just section capability and lack of oblique section capability. No matter for concrete or reinforced concrete beam, oblique failure is brittle, which is forbidden in structure engineering. Concrete beam shear strengthened by pasting FRP is an effective method for strengthening oblique bearing capability.Based on existent datas of experiments, for the sake of validating the feasibility of analyzing shear capability of beam by finite element method, this paper analyses the mechanical performances of models whose datas are exist by finite element analytic software ANSYS . Then, mechanical performances of series models are analyzed by ANSYS. This paper analyzes influence of bonding mode, that is, pasting mode and quantity of FRP, on the shear capability of RC beam. The shear capability, change on stress of stirrup steel, change on distributing of the stress of FRP are analyzed. The analysis indicates: Analysis by numbering simulation calculation on concrete structure in the help of finite element analytic software is a feasible method,which can well simulate bond-slip between FRP and concrete. FRP that with lower elastic mode is favor for the shear bearing capability of RC beam; Bonding mode, that is, different breadths and distances of FRP sheets influence shear bearing capability of RC beam; It is not the larger or the smaller the breadths and distances of FRP sheets are better, the paper suggests breadth of FRP is 75 m; Efficiency of Several layers is lower than single layer; RC beam strengthened in bidirectional pasting has higher shear bearing capability than the one strengthened in U+layering method, but the unit FRP quantity is similar to the one which is strengthened in U+layering method, so it is more efficient;The form of breakage indicated by load-displacement is coincident with characteristics of oblique breakage.Finite Element Method in this paper is accurate.The conclusions are consultatively useful in design of reinforcement engineering,and they are basic while futher study is done on capability of shear strengthening on RC beams.