The Experiment Research Of Steel Reinforced Super-High-Strength Concrete Columns On Mechanics Performance

With the development of high-rise buildings, reinforced super-high-strength concrete (RSHC) columns and steel reinforced super-high-strength concrete (SRSHC) columns are being used originally and have a valuable application prospect in the future. The research is carried out for the aseismatic and shear mechanical performance of RSHC and SRSHC columns and ductility of SRSHC columns by the tests of 18 columns.The research is carried out for mechanics performance of reinforced super-high-strength concrete(RSHC) columns through the experiment of 5 columns. The ability of deformation, dissipation energy and the failure mode that the RSHC can make are discussed. Axial pressure ratio and hoped reinforcement ratio which affect the ductility of RSHC columns is analyzed. Also, The main elements that influence shear mechanical performance of RSHC columns are analyzed. The formulas of shear resistance of RSHC short columns are put forward. Some useful suggestions to the engineering design are acquired from the paper.The research is carried out for mechanics performance of (SRSHC) columns through the experiment of 13 columns. The ability of deformation and the failure mode that the SRSHC can make is discussed. Axial pressure ratio and hoped reinforcement ratio which affect the ductility of SRSHC columns is analyzed. The suggested limit values of axial pressure ratio and minimum hoop ratio of columns are put forward through the test, which satisfy certain requirement of ductility.The research on the shear resistance of SRSHC columns is carried out. Based on the experiments of SRSHC columns, the influence of several factors, such as axial compression ratio and hoop ratio of transverse reinforcement, on the shear resistance is analyzed. Theoretical calculation based on the stress analysis is discussed. The formulas of shear resistance of SRSHC columns are put forward applying principle accumulation. The calculated results defer to the experimental results.According to the study on steel reinforced super high strength concrete of hysteretic curve. Trilinear hysteretic model is put forward for SRSHC, and the calculation formula of the characteristic parameters in hysteretic model of SRSHC is put up. This model also can be usedfor steel reinforced high strength concrete columns. It is the basis of the time analysis of elasto-plastic dynamic.