Experimental study on bearing capacity of axial compression column after corrosion and bond weakening of steel bar
The influence of the decrease of bond performance on the compressive bearing capacity of the column after the corrosion of the steel bar was simulated by removing the concrete around the steel bar.The results show that the corrosion degree of steel bar has obvious influence on the bearing capacity of axial compression column with weakened bonding force.When the corrosion of steel bar is not serious,the strain of steel bar and concrete is basically the same,and the strength of the two materials can be brought into play when the column is destroyed.When the steel bar is seriously corroded,the strain of concrete lags behind,and the strength of concrete cannot be fully exerted when the column is destroyed,and the more the number of corroded steel bars,the faster the bearing capacity of the column decreases.At the same time,with the decrease of bonding performance,the number,length and width of cracks in the column are reduced.According to the experimental results,the calculation method of bearing capacity of axial compression column after corrosion and bond weakening of steel bar was deduced.
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