Bond-Slip Behavior of High-Strength Stainless Steel Wire Mesh in Engineered Cementitious Composites: Numerical and Theoretical Analysis

This study introduces high-strength non-prestressed steel strands as reinforcement materials into Engineered Cementitious Composites (ECCs) and developed a novel high-strength stainless-steel-strand-mesh (HSSWM)-reinforced ECC with enhanced toughness and corrosion resistance. The bonding performance between HSSWM and an ECC is essential for facilitating effective cooperative behavior. The bond behavior between the HSSWM and ECC was investigated through theoretical analysis. A local bond-slip model was proposed based on the average bond-slip model for HSSWM and ECCs. The results indicated that the local bond-slip model provided a more accurate analysis of the bonding performance between HSSWM and the ECC compared to the average bond-slip model. The effects of the ECC's tensile strength, steel strand diameter, and transverse strand spacing on local bond-slip mechanical behavior were investigated through FEA. The results showed that the local bond-slip model and FE results aligned well with the experimental data. Additionally, the distribution of bond stress between the HSSWM and the ECC was analyzed using the micro-element method based on the local bond-slip model. A prediction model for the critical anchorage length and bond capacity of HSSWM in the ECC was established, and the accuracy of the model was verified.