Experimental Study On Pre-cast Reinforced Concrete Frame-shear Wall Based On Different Assemble Methods

Prefabricated structure improves the development model of traditional construction and shortens the construction period. It will be the new development trend. Researches into prefabricated frame-shear wall structure can fill a gap in the field, aiming at changing construction type into sustainability.As a part of twelve-five science and technology support program, the research, which is based on compressive shear tests of column to wall connection and beam to wall connection, is about experimental study of prefabricated frame-shear wall overall structure. The object of the experiments is to know the influence of construction member, such as column, wall, beam and joint, on the whole structure. Quasi-static tests of 4 prefabricated frame-shear wall structure specimens based on different kinds of assembly methods were executed, which are only pre-cast column(PCc), only pre-cast wall(PCw), reserved post-pouring zone(PC1) and all pre-cast(PC2). Then the nonlinear numerical simulations were performed by WCOMD, developed by Tokyo University, Japan.The test results indicate that the failure mode of 4 specimens is ductile failure, familiar with each other, i.e., tensile yield of vertical reinforcements and compressive failure of concrete. Before yielding, the stiffness of PCw is max, that is 1.17 times that of PCc and the stiffness of PC2 is min, which is 96% of PCc. The maximum force of PCc is 1211 kN, while the max force of PCw and PC2 is both nearly 1370 kN, 1.13 times that of PCc and the max force of PC1 is the min, 97% of PCc. The force descent trends of PC1 and PC2 are smoother than those of PCc and PCw. The ductility of PC1 and PC2 with pre-cast column and pre-cast wall is good, especially the ultimate drift ratio of PC2 is 1/53~1/52, almost 1.38 times that of PCc. The hysteric curve of PC2 is plumpest and PC2 has the greatest energy dissipation capacity.According the results of experiments and FEM analysis, it can be indicated that as the degree of assembly increases, the stiffness decreases slightly but ductility increases. The method of the irrelevant reinforcement with through hole is almost equal with the cast-in-place structure. All of four specimens, the all pre-cast one which has concave keyways in both of the column and wall sides and vertical grouted joints, has the best performance of ductility and energy dissipation capacity, almost equal to the cast-in-place structure.It is proposed that the method of the irrelevant reinforcement with through hole and the method of concave keyways in both of the column and wall sides and vertical grouted joints have good seismic performance. Further research on these methods can be carried out. Finally, the article proposed the future research area.