FRP reinforcement concrete component direct tensile test device and use method

Abstract

The invention discloses a FRP reinforcement concrete component direct tensile test device and use method. The test device comprises a FRP reinforcement concrete component and a fixed cabinet; the FRPreinforcement concrete component comprises a FRP reinforcement, a concrete part, a front-end steel tube, a rear-end steel tube, a patch, a light steel wire, a front-end clamp, a rear-end clamp, a first LVDT displacement sensor, a second LVDT displacement sensor, and a third LVDT displacement sensor; the fixed cabinet comprises a horizontal pedestal and a reaction wall; a test piece bearing bracketis arranged on an upper end part of the horizontal pedestal, and a roller module is arranged on a bracket placing surface of the test piece bearing bracket; an actuator is arranged at a front end side of the test piece bearing bracket, and a front-end clamping piece anchor is arranged at a rear-end hinge seat of a loading end of the actuator; and a rear-end clamping piece anchor is arranged at the reaction support seat of the rear-end side of the test piece bearing bracket. The test device disclosed by the invention can effectively perform direct tensile test on the FRP reinforcement concretecomponent. The test device disclosed by the invention can be effectively used in the use method.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a direct tension test device for FRP reinforced concrete members and a use method. Background technique [0002] Since reinforced concrete was widely used in civil engineering, the corrosion of steel bars has been a serious safety and economic problem, especially in corrosive environments. In recent years, fiber-reinforced polymers (FRP) have attracted extensive attention from the engineering community due to their light weight, high strength, and corrosion resistance. [0003] It should be pointed out that FRP bars are a promising solution as a reinforcing material to replace steel bars in concrete. Since FRP bars have higher strength and lower elastic modulus than steel bars, this makes the deflection and crack width of the structure under normal service loads the control criteria in the design; therefore, the contribution of concrete in the tension zone becomes An ...

AI Technical Summary

Problems solved by technology

[0008] 4. Existing codes underestimate the deflection of FRP reinforced concrete members under service loads;

[0009] 5. The phenomenon that concrete in the tension area provides additional stiffness after cracking is called "tensile stiffening effect". Different researchers have not yet reached a consensus on the analysis of "tensile stiffening effect".

[0010] 6. There are no domestic researchers engaged in related research, and the current existing devices cannot conduct experimental research on the tensile stiffness of reinforced concrete

Images