Nonlinear Analysis Considered Sliding Of Reinforcement Anchoring For Reinforced Concrete Special-Shaped Column

By reason of enlarging useful chamber area, lightweight and according with the direction of wall material reformation, the frame structures with special-shaped R.C.columns are applied more and more widely in recent years. Therefore it is a necessity to develop special software to design and analyze this kind of structure. The purpose of this paper is to analyze the whole process of nonlinear finite element of the special shaped R.C columns.The content of this paper is nonlinear analysis of complete response process for T ,L and"十"shaped section R .C. columns under axial compression and biaxial bending. In the beginning of the paper, it summarized the history and the actuality of the nonlinear analysis of special-shaped columns and the capability of the sliding of reinforcement anchoring. On the basis of related papers, the full path of stress-strain relation of concrete and the sliding of longitudinal reinforcement anchoring are all considered. According to generating finite element model by meshing for special-shaped section columns and the conversion of coordinate,a computer program considered sliding of reinforcement anchoring using the digital iteration method for full range analysis of special-shaped columns is complied. By the analytical results, N-M-φrelated curves are obtained, compared to the N-M-φcurves that get from the relative experiment to testify the correction of the program. And through change the load angle, axis-press ratio, intensity degree of R.C. and so on, to understand the influence for the M-φrelation curve of special-shped column rection with considerd the sliding of reinforcement anchoring. And compared the results to rectangle rection, analyzed the effect with the ductility of the special-shaped column by the factor referd ahead.The sustentation fund from Hunan province's building project (research on the design analytical method of structural system of reinforced concrete special-shaped columns) is received in the process of the paper's study.