The Experimental Investigation Of Z-Shaped Column’s For The Right Cross-Section Bearing Capacity To Low-Cyclic Horizontal Load

Z-shaped concrete column is widely used in the project because of its unique advantages, but, researches on Z-shaped concrete column subjected to axial compression and biaxial bending are absent. Based on the experimental study of 11 Z-shaped columns subjected to biaxially eccentric compression, this dissertation reveals the failure pattern of Z-shaped column for us. It also examines the hypothesis of plane cross-section of average strain, and summarizers the general regularity of ultimate strength and ductility of Z-shaped concrete columns under low-cyclic horizontal load.Basing on the results of experiments, we used the software "ANSYS" which builded on the finite element method, comparison between theoretical and experiment results was made and satisfactory agreement between them was obtained. On the basis of these, analyzes the affection to the right section ultimate bearing capacity and ductility of Z-shaped concrete columns about changing different parameter of compress ratio, strength of the concrete, steel ratio, load angle, stirrup reinforcement ratio and height-width ratio of the Z-shape column.Finally,a computer program with matlab for the calculation of column reinforcement is compiled. With this program, N-M interrelated curves of Z-shaped clumns can be gained, a further study the affection to the right section ultimate bearing capacity on the different strength of the concrete, the different steel ratio and the different load angle of the Z-shape column. Some suggestions respect to practical engineering were presented for the reference of structure designer.