Research On The Calculation Method Of Bearing Capacity Of Steel Reinforced Concrete Column With Monosymmetric Cross-shaped Steel Under Axial Compression

Scholars have conducted extensive studies on the axial compression,eccentric compression,shear and flexural properties of steel reinforced concrete columns.These studies mainly focus on SRC columns with built-in symmetrical section steel,but the research on SRC columns with asymmetrical section steel is still Relatively less.Some existing researches have focused on SRC special-shaped columns with T-shaped and L-shaped cross-section steels,and SRC rectangular columns with T-shaped or L-shaped steel,but the research on columns with monosymmetric cross-shaped steel in rectangular cross-sections are not yet involved.In order to facilitate its popularization and application,this paper will conduct experimental research and theoretical analysis on its force performance under axial compression.9 monosymmetric cross-shaped steel rectangular section columns with flanges are designed,from four factors to research the axial compression performance of monosymmetric cross-shaped steel concrete columns.they include section steel eccentricity,steel ratio,concrete strength and hoop ratio.The numerical analysis of the monosymmetric cross-shaped steel concrete columns were carried out with ABAQUS software,The numerical caculate result and the test result have little errors,verify the model building method in this article is right,combined with engineering reality,the finite element model was redesigned,and the parameters affecting its bearing capacity were analyzed.The parameters include steel strength,longitudinal reinforcement ratios,stirrup strength and whether to configure studs.According to the strength of the stirrups on the concrete restraint,the entire cross-section of the composite column concrete is divided into three areas,which are the non-effective restraint area of the stirrup,the effective restraint area of the stirrup and the compound restraint area.Since the section steel also has a restraining effect on its internal concrete,the concrete in the compound restraint area is further divided into five small areas.Based on the full-process load-displacement curve of monosymmetric cross-shaped steel concrete columns can be obtained.Finally,the axial load bearing capacity can be defined according to the experimental phenomenon and theoretical analysis.However,the calculation value is closer to the test results.It also provides a design reference for the future engineering application of this type of SRC columns.