ABAQUS-Based Uniaxial Compression Performance Study of CFRP-SC Columns

With the increasing shortage of sand resources for construction, sea sand has become its emerging alternative. However, since sea sand can lead to the deterioration of concrete structures, it is particularly important to design a corrosion-resistant, efficient, green, convenient, and low-cost reinforcement method. Carbon fiber reinforced composites (CFRP) with corrosion resistance and high strength can enhance the mechanical properties and durability of sea sand concrete structures (SC). In this paper, ABAQUS subroutine VUSDFLD is used for secondary development, combined with unit deletion algorithm and maximum tensile stress criterion to establish a uniaxial compression damage model, to analyze the damage effect of uniaxial compression state of CFRP-Sea Sand Concrete Column (CFRP-SC). The results show that: (1) CFRP fibers can effectively improve the compressive and load-bearing capacity of SC, thus reducing the stress concentration phenomenon when the column is under compression. (2) The damage evolution of CFRP-reinforced SC under uniaxial pressure is slower, and the high strength of CFRP fibers can effectively resist crack expansion and slow down the damage process of the column.