A Recommendation for Load-sharing and Reinforcement Ratios in Design of RCFT Columns

Abstract

The load-sharing and axial reinforcement ratios are the two important indices which will directly affect the performance of RCFT columns. To obtain optimal ranges for these two indices which will put the RCFT into better mechanical and economic condition, using the validated numerical simulation model for RCFT, numerical parametric studies on load-sharing and reinforcement ratios of RCFT columns subjected to both axial compression and bending are performed. Through a plenty of simulation and analyses, optimal ranges for both load-sharing and axial reinforcement ratios are proposed. Meanwhile, the proposed optimal ranges are validated with both big-sized RCFT columns same to actual construction and bending. According to the validation results, the proposed ranges are applicable to RCFT columns under axial compression and bending and in any size.