| With the continuous development of housing industrialization in our country, the assembly type structure will be the subject of future architectural development. And in which, assembly type frame shear wall structure have both advantage of assembly type frame structure and assembly shear wall structure, it will have a broad prospect in application. The assembly type core tube structure as a form of assembly type frame shear wall structure will be widely applied in high-rise residential construction in the future. So study on seismic performance of connection between components of the assembly type frame core tube structure system is crucial. At present, the assembly type structure is formed by the cast structure design and through the split and combination, the overall performance and seismic performance of assembly type structure is decided by the performance of the component connection, however, its component connection whether can achieve the same performance with the cast structure still does not have relevant tests confirmed. So the research on the performance of connection between assembled components has an important significance in promoting the development of assembly structure.In this paper, we made two assembly in-plane wall-beam joints specimen by two methods, and we made a cast joint specimen at the same time, then, we have done low cyclic loading test on three specimens. Through the experimental phenomena and the test data, we can analysis the development of cracks, failure characteristics, cracking load, yield load, ultimate load, yield displacement and force displacement hysteretic curves, skeleton curves and the stiffness degradation curves of each specimen in the loading process, then, we can comparative analysis the bearing capacity, ductility, stiffness and energy dissipation capacity of assembly specimens and cast specimen.Through the analysis of experimental results the following conclusions are got:from the experiment phenomenon, assembly type specimen cracking, yielding and failure process were basically the same with cast specimens, their failure form were all bending failure at the beam end; In the aspect of the bearing capacity, the bearing capacity of each phase of assembly specimens are slightly less than the cast specimen, while the bearing capacity of each phase of the two assembly specimens are closer; to observe the specimen stiffness degradation curves and obtained:the assembly specimens' stiffness degradation curve have the same change trend with the cast-in-place specimen's, but the assembly specimens'stiffness is slightly less than the cast specimen's, and stiffness degradation of the two assembly specimens in the loading process are basically the same; in the aspect of the ductility, assembly specimens'displacement ductility coefficient is less than cast specimen, but the difference is less than 11%, it means that assembly specimens'ductility close to cast specimen, the two assembly specimens'displacement ductility coefficient are basically the same, that ductility equivalent; in energy dissipation capacity, assembly specimen which is connected by cast belt have stronger energy consumption capability than cast specimen, while assembly specimen which is connected by the high-strength mortar pouring have close energy dissipation capacity to cast specimen.In this paper, finite element analysis software ABAQUS was used to carry out numerical analysis on an assembly specimen and a cast specimen, and then, the finite element analysis results coincides with experimental results very, so the finite element analysis method can be used to analysis assembly specimens. Using finite element analysis method to analysis the improved assembly specimen, it can be obtained that the bearing capacity of the improved assembly specimen is higher than that of cast specimen, so in the experiment, if the improved assembly specimen is used, the bearing capacity of the improved assembly specimen may also be higher than cast specimen. |
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