STUDY ON ASEISMIC PERFORMANCE OF A NEW TYPE OF FABRICATED STEEL FRAME WITH INTERNAL DESULFURIZATION GYPSUM BLOCK WALL

In order to analyze the effect of desulfurized gypsum block filling wall on the aseismic performance of a new fabricated steel frame, we carried out the quasi-static test of a single span 2 layer fabricated steel frame with 1/2 scale and obtained the failure mode of masonry block filled wall. Compared with a steel frame, we obtained the statistics about effects on the aseismic performance of a steel frame and concluded that:the steel frame with new assembly joints has good aseismic performance; the presence of desulfurized gypsum block filled wall increases the initial stiffness of the frame and the ductility and energy dissipation of the frame. Additionally, numerical modeling is used to simulate the experiment, and the results are in a good agreement with the experiment. The parameter analysis of axial compression ratio, high span ratio and block thickness of specimens were also conducted. The data of these suggest that:the compression ratio of the specimen has a certain weakening effect on its ductility, the recommended axial pressure ratio is less than 0.4; too large or too small of the high span ratio structure is unfavorable, changing the thickness of block has a great influence on initial stiffness, but it has little effect on the bearing capacity of the structure.