The Mechanical Behavior Analysis Of R.C Structure With Specially Shaped Conlumns And Related Components

R.C special-shaped column structure, as a new force in residential buildings,together with short-pier shear wall R.C structure,is one of the popular structure forms in sub-high rise building at present.There is a broad application background.Special-shaped columns will be seriously destroyed in earthquake because its special section.This paper makes a research on the integral analysis of R.C frame structure with special-shaped columns and frame structure with rectangular columns.At the same time,the article makes a comparison with different axial compression ratios,different ratios of height to thickness,and different stirrup spacings.The skeletons of this thesis are as follows.First,there will be the contrast analysis between frame structure with specially shaped column and the one with rectangular during the elastic-line stage and elastoplasticity stage,the result which is little differerce in the dynamical characteristic between the two frame structures and the ductility of frame structure with rectangular columns is better than the other one. the paper has a farther analysis on the frame structure with specially shaped column.When the ratio of height to thickness of all columns increases,yielding loads and ultimate losds are also improved greatly,however the dutility is almost on enhanced.Second,this paper has an analysis on the bearing capacity of T-shaped column in different neutral axis angle by SAP2000 software.Every kind of column has different neutral axial angle when it reach the maximum bearing capacity.In the same angles,the bearing capacity and ducility of + -shaped column is best, which the bearing capacityof L-shaped column is worst,and the ductility of T-shaped column is worst.Third,the analysis of T-shaped column with different volume stirrup ratio by a monotonic loading simulated test,by the finite element ANSYS software is also conducted. Some conclusions are reached:when stirrup spacing is increased,the ductility is reduced, the ductility of the column is best who's ratio of height to thickness is 2.92, when axial compression ratio increases,the ductility is reduced.