The Experimental Investigation And Nonlinear Finite Element Analysis Of Frame Joint With Z-Shaped Clumns

Now,Z-shaped column is widely used in the structure of residential architecture in China, but the researches on the behavors of Z-shaped column are insufficient, and the researches on the shear behavors of frame joint with Z-shaped clumns are absent. Based on the experiment study and theoretical analysis of shear behavors of frame joint with Z-shaped clumns, this dissertation reveals shear failure mechanism and discipline of frame joint with Z-shaped clumns for us. It also provides us with the design method which can be used in practical engineering.Firstly, the shear-resistant carrying capacity experiment of frame joint with Z-shaped clumns was carried out, through the synthetic analysis on both crack expanding condition and failure modes, the shear failure mechanism and shear failure discipline are studied. And the axial compression ratio、stirrup reinforcement ratio and ratio of section height to section thickness of column1eg, which affect the shear-resistant carrying capacity of frame joint with Z-shaped clumns, was preliminary analyzed.Secondly, based on the results of experiment, the nonlinear finite element calculation was carried out, a further study was accomplished on the effect of those influential parameters which contained axial compression ratio、stirrup reinforcement ratio and ratio of section height to section thickness of column leg. Conclusions can be drawn as following:the most important factor which affected shear-resistant carrying capacity of frame joint with Z-shaped clumns was axial compression ratio and stirrup reinforcement ratio.Lastly, the calculation method about shear-resistant carrying capacity of frame joint with Z-shaped clumns was studied according to the experiment results and finite element numerical simulation results. The regression formula and the design formula were obtained from the experiment and numerical simulation results. Some suggestions respect to practical engineering were presented for the reference of structure designer.