Experimental and modeling research on compression-shear behavior of carbon fiber reinforced coral concrete

Abstract

With the accelerating development of oceanic resources, the broad application potential of coral concrete (CC) on islands and reefs has been identified. Incorporating carbon fiber (CF) into CC improves its mechanical properties and further expands its application scope. Moreover, many concrete members usually suffer combined compression-shear loading during service. Thus, this work focus on the compression-shear behavior of carbon fiber reinforced coral concrete (CFRCC). Combined compression-shear test results show that the compression-shear failure process can be divided into four stages. The peak shear displacement, peak shear stress, and initial shear stiffness increase are significantly influenced by the normal stress ratio, CF dosage, and concrete strength grade. Secondly, a compression-shear damage model considering the influences of normal stress ratio, CF dosage, and concrete strength is proposed. By comparison, this model is proved to be effective for simulating the shear behavior of CFRCC under combined compression-shear stresses.