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Theoretical analysis and numerical calculation of the building structures with impact resistant character depend on the parameters and results of the experiment. The dimensions of the plototype is shrunken to the experimental model. The minification of the dimension and strength is not accordant between the plototype and the experimental model. Usually,the relative strength of the experimental model is greater than the plototype. Thus, the research on convergent-divergent ratio is needed when designing the experimental model with impact resistant character. The relationship between convergent-divergent of physical dimension and deformation, stress, pressure, wave speed, time, mass point speed is researched based on impact dimensional analysis. The lamination crack of concrete is also obtained.