Experimental Study of PUFA Shear Strengthening in the Reinforced Concrete Beams and Theoretical Analysis
|School||Harbin Institute of Technology|
|Course||Bridge and Tunnel Engineering|
|Keywords||reinforced concrete beam PUFA inclined section strengthening limitbearing capacity of shear|
Reinforced concrete structure has a more than hundred years history since birth.Withthe passage of time, old reinforced concrete structure has started to appear damagephenomenon, and even more serious, a large number of reinforced concrete members arein urgent need of strengthening. In view of the actual engineering needs, this paperproposes a new idea for inclined section reinforce——PUFA material used for shearstrengthening of reinforced concrete structures.This paper introduces the material mechanical properties and constitutive relations,according to the characteristics of the material, designed a five shear strengthening beamstrial.1piece of beams was used as the contrast beam, the two beams were used fordifferent thickness PUFA shear strengthening, the test verified the effectiveness of PUFAmaterials for reinforced concrete shear strengthening. The rest of the2slice beams wereused for PUFA-steel composite strengthening, the test also proved the feasibility ofPUFA-steel composite strengthening. At the same time, finite element analysis ofreinforced concrete structures was introduced in detail combines ABAQUS software inthe paper, this reserach also used ABAQUS software to test these beams by numericalsimulation, the nonlinear analysis results agreed well with the experimental data, it provedthe accuracy of the test.In addition, this article introduced the related theories of oblique plane stress analysis,and made a theoretical analysis about the calculation for the bearing capacity of shearstrengthening. Combined with the existing theory, the research got the limit bearingcapacity calculation formula of PUFA shear strenghthening, and verified the formula bynumerical simulation. Established the design theory on the PUFA material used for shearstrengthening of RC structures.