Study on mechanical behavior of high strength stirrup confined concrete under axial compression
In order to get the peak parameters of confined concrete by high-strength stirrup,the confinement effect index is selected as the analysis variables in this paper.The confined concrete peak stress calculation formula is established based on Guo-Wang concrete five parameter failure criterion,and the calculation formula of stirrup stress at confined concrete peak stress is derived according to the relational expression of the effective lateral restraint and stirrup strain.The relevant formula calculated values are in good agreement with the experimental values.Finally,a numerical example is given to show that the method is feasible,which can be applied in the theoretical calculation of the peak stress,strain of the confined concrete by stirrup in the paper.
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