Universal Model To Predict Compressive Behavior Of Confined Tin Slag Polymer Concrete Column

Abstract

This study explores the application of analytical approach in predicting the compressive behavior of TSPC confined with FRP and metallic material based on previous studies on concrete structures. Experimental results on tensile strength of confinement materials and compressive strength of confined TSPC have been employed to obtain radial confining pressure and to validate the mathematical prediction. Tensile strength of confinement material was 196.51 MPa (GFRP), 198.25 MPa (CFRP), 199.89 MPa (BFRP), 279.43 MPa (AFRP) and 485.20 MPa (mild steel). Unconfined TSPC column has maximum compressive strength of 59.19 MPa and the strength was enhanced with the application of confinement materials. The highest compressive strength enhancement was TSPC confined mild steel (TSPC-FM) with 131.84 MPa followed by TSPC confined AFRP (TSPC-AF), TSPC confined CFRP (TSPC-CF), TSPC confined GFRP (TSPC-GF) and TSPC confined BFRP (TSPC-BF) with 114.24 MPa, 108.77 MPa, 85.54 MPa and 81.52 MPa. Mathematical evaluation by Mander, Wei, Saadatmanesh, Lam & Teng and proposed model for compressive strength has provided different values for TSPC-GF (85.54 MPa, 89.54 MPa, 85.54 MPa, 92.29 MPa and 86.08 MPa), TSPC-CF (108.77 MPa, 120.54 MPa, 108.77 MPa, 79.42 MPa and 74.33 MPa), TSPC-BF (81.52 MPa, 89.33 MPa, 81.52 MPa, 89.29 MPa and 79.65 MPa), TSPC-AF (114.24 MPa, 120.52 MPa, 114.24 MPa, 114.24 MPa and 109.26) and TSPC-FM (131.84 MPa, 148.14 MPa, 131.84 MPa, 239.07 MPa and 131.03 MPa). Overall, the study suggested that Mander and proposed model have the capability to be adapted as universal model to represent confined TSPC column behavior under compression. The compressive behavior through stress versus strain curve as predicted by Mander and proposed models have shown closer match with experimental on all variant of test samples.