Experimental Research And Theoretical Analysis About HPFL Strengthening Seismic Performance Of Existing RC Shear Wall Structure

HPFL(high performance ferrocement thin) is a reinforcement method which is economical and applicable, strengthening effect and simple construction. The raw material which has excellent mechanical properties, but also has many good characteristics, such as good durability, good high temperature resistance, good compatibility and coordination with the original members. So the HPFL reinforcement method is widely used in the reinforcement engineering of concrete structures, Related research has made the research results of the comparison system, but so far, most of research is HPFL strengthened RC beams, plates, columns, no research on reinforced concrete shear wall with HPFL strengthening. To provide references to the application of RC technology in reinforcement of shear wall. This paper designed 3 pieces of a large proportion of RC shear wall, two of these shear walls strengthned by HPFL under twice loading. The calculation method of analysis of the combination of quasi static cyclic loading test, finite element numerical simulation and theory. The seismic performance of HPFL RC two stress reinforced shear wall under cyclic loading are studied. The main research results are as follows:1.By comparing the results of model test analysis: Strengthned by HPFL under twice loading can effectively bind RC shear wall; The seismic capacity of the shear wall has a significant increase, the specimen with edge column reinforcement(JG1) increased by 84%, its ultimate bearing capacity, but because the reinforcement layer reinforced with wall slip deformation in the horizontal direction, improve the way of strengthening the energy performance of shear walls in frame; In the framework of scissors specimen reinforcement(JG2),its ultimate bearing capacity increased by 130%, ductility increased by 12%, energy dissipation capacity increased by 64%, it can effectively improve the seismic performance of shear wall.2. Through the finite element analysis software ANSYS, the nonlinear analysis on the test of three pieces of RC shear wall, the simulation results of DB1, JG1 and JG2 are compared with the experimental results. It shows that the simulation results agree well with the experimental results; On this basis, the reinforcement of RC shear walls strengthened with HPFL were further explored and found frame scissors brace form of reinforcement compared to comprehensive reinforcement in the form of shear wall bearing force enhancement as well as the seismic performance improvement are somewhat better than, and frame pair of scissors brace reinforcement in the form of shear wall stiffness degradation and energy dissipation capacity improve the best.3.Based on the test results, this paper discussed the stiffness and seismic calculation methods of RC shear wall which strengthned by HPFL under twice loading, compared the theoretical calculation results and thetest results. The calculated results agree well with the experimental results.