| Iron tailing sand concrete is used to replace ordinary river sand as fine aggregate concrete.In terms of performance,iron tailing sand concrete is similar to ordinary river sand concrete.The reinforced concrete column mainly plays a load-bearing function in the frame structure,which is subjected to vertical load and horizontal load.Once the column is damaged,its entire structure will be greatly affected.Therefore,it is of great significance to study the seismic bearing capacity of iron tailorite concrete column for the safety performance of sustainable development and evaluation structure.Based on the 7 iron tail sand concrete columns and 1 pillar of ordinary river sand concrete to test and research on iron tail sand concrete columns in changing concrete strength grade,stirrup characteristic value and axial compression ratio of the three parameters of the concrete column under the condition of the seismic bearing capacity.The research contents and achievements are as follows:1)Carefully check the results of the research on the seismic test of reinforced concrete columns by domestic and foreign experts and scholars,and confirm the experimental plan and research contents.2)Basic mechanical test of concrete cube test block and rebar material according to the mix design.It mainly measures the compressive strength and tensile strength of the cube,and provides a strong foundation guarantee for the subsequent calculation of bending bearing capacity.3)To make the specimen,including the mold,the casting and vibration,and the postwatering maintenance.4)Carry out test and process test data.The calculation formula of bending bearing capacity is deduced by hysteresis curve,skeleton curve,reinforcement strain and load curve.At the same time,it is concluded that the bending bearing capacity increases with the increase of concrete strength grade and axial pressure ratio,and the effect of the coupling characteristic value on the flexural bearing capacity is not obvious. |
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