Mechanics Analysis On Steel Reinforced Concrete Columns Of Precompressed Stress

The steel reinforced concrete (SRC) structure is a type of built-up structure where steel is deployed inside reinforced concrete (RC). It has been widely applied in modern architectures due to its features, such as high supporting capacity, large rigidity, and good earthquake resistance performance. However, since the axle strength of the SRC column is allocated according to the compression stiffness of reinforcing steel and concrete, the allocation proportion of axle strength is determined by the section size of reinforcing steel and concrete. Consequently, the reinforcing steel cannot be fully functioned and the axis-to-press ratio cannot be greatly reduced. Steel Reinforced Concrete Columns of Precompressed Stress has fully exploited features of built-up structures, in which RC undertakes most axle strength and the axis-to-press ratio of surrounding concrete is reduced through two-stage construction. Thus, the initial compression strain of the edge of surrounding concrete is decreased accordingly. So the process of reaching ultimate compression strain is extended. Therefore, Steel Reinforced Concrete Columns of Precompressed Stress has very good performances on ductility and earthquake resistance.In this thesis, we establish a real model of Steel Reinforced Concrete Columns of Precompressed Stress by applying ANSYS finite element analysis software. The thesis analyzes the axis strength allocation during the load process of RC and concrete under the influences of axis-press ratio, pre-press ratio, and steel content ratio. The P-s curve under monotonous load is obtained, and the impacts of every fact on capacity and ductility are analyzed. Lastly, the thesis proposes a design method for Steel Reinforced Concrete Columns of Precompressed Stress, and analyzes the threshold of limitation of nominal axial compression and reasonable values of steel pre-press coefficient.