Study on axial compression ratio limits of large size S-CLIP reinforced columns

Abstract

Based on the constraint mechanism of concrete, an improved method of S-Clip reinforcement was proposed. Experimental study and numerical simulation were carried out on the large size normal reinforcement column and S-Clip reinforcement column, and the numerical calculation analysis was carried out on the improved S-Clip reinforcement column. On the premise of ensuring the bending failure form, the reasonable axial compression ratio limit of S-Clip reinforcement column was studied to provide a reference for the application of S-Clip reinforcement method. The results showed that the deformation capacity of both s-Clip reinforced column and the improved S-Clip reinforced column decreased with the increase of the axial compression ratio limit. The numerical simulation results were close to the test results, and the stiffness reduction rules and other rules had good approximation, and the failure modes were consistent. For the improved S-CLIP reinforcement column, the test axial compression ratio should not exceed 0.3. The influence of size effect was not considered in this study.