The Initial Parameter Method For Static And Dynamic Analysis Of Frame Shear-Wall Structures With Variable Sections

Based on mathematical model with continuous technique in this paper, the frame shear-wall structures with variable sections is simplified as a cantilever beam with variable stiffness, and each floor's shear-wall equivalent bending and frame equivalent shearing stiffness are derived. In structural static force analysis, two analytical methods are introduced. They are initial parameter method and finite element approximate analysis method. The former method makes use of continuous function of structural equivalent bending and shearing stiffness that varies with height, and utilizes the shear-wall's lateral level displacement that equals to the frame's lateral level displacement. Imposing this analytical method, the formulas have the advantage of computational simplicity. The second method makes use of the finite element approximate analysis method , The method makes highly less degrees of freedom of structure than of general finite element method. Therefore, it is simple, effective and accurate. In structural dynamic characteristic analysis, centralized mass method is proposed, and its initial parameter method of computational process is simple. Finally, the present methods in the paper and ANSYS software are used to calculate the concrete example of the frame shear-wall structures with variable sections and these results are compared and analyzed. It is shown that the present methods are simple and meet engineering precision. Hence, those methods that are put forward in the paper are economical and effective.