An Experimental Study On Hysteretic Behavior Of Reinforced Concrete Transnomal Short Columns And Steel Reinforced Concrete Transnomal Short Columns

Frame columns in the concrete structure of large-scale thermal power plants have to bear large axial stress due to the large vertical loads (such as a furnished for arranging coal bucket between interbedded, whose mass too concentrating). As a result, short/transnormal short columns are widely used in such structures because the cross-section of frame columns depends on the limit of axial compressive ratio. Short columns endure more lateral load because of its large stiffness compared with general columns. The deformation behavior and ductility of short/transnormal short columns are poor due to the shear failure, thereby decreasing the antiseismic performance of the concrete structure. This study introduces the steel reinforced concrete column and the split column to concrete frame structure in order to improve the ductility and deformation behavior of the columns, and thereby improving the the structure. The main contents are as follows:(1) Four transnormal short columns (two reinforced concrete transnormal short columns and two steel reinforced concrete transnormal short columns) and four split columns (two split reinforced concrete columns and two split steel reinforced concrete columns) have been experimentally investigated under combined constant axial load and lateral cyclic load according to the characteristic of the frame columns and the improved scheme. Bearing capacity, skeleton curve, stiffness decay, deformation capacity and energy dissipation are analyzed, and the antiseismic performance of short/transnormal short columns are also compared.(2) The results of experiment and analyze are compared. The suggestions are also proposed according to the results of experiment.