Study on probability analysis method for brittle performance of steel component with crack damage based on residual ultimate strength

Regarding the issue of brittle behavior of steel component with crack damage, most research has focused on the influence of simple horizontal crack, while neglecting the influence of crack from different angles. There is also a lack of the probability analysis method for brittle performance of steel component with crack damage. The experimental analysis of steel component damaged by crack from different angles was conducted in this paper. According to the influence of crack on the bearing capacity of steel component, it is divided into the plastic bearing capacity and brittle bearing capacity. Furthermore, based on the residual ultimate strength of steel component, a method for calculating the bearing capacity of steel component and analyzing the likelihood of brittle performance of steel component with crack damage was proposed. The method proposed in this paper is not only applicable to the case of crack at different angles, but also takes into account the variation of the bearing capacity of steel component due to changes in cracks. Through experimentation and comparative evaluation, the suggested approach demonstrates that with the escalation of relative crack length or the angle between the crack and the force direction, the likelihood of brittle behavior of steel components impaired by cracks at various angles progressively rises. The proposed technique can not only assess the load-bearing capacity of steel components but also evaluate the likelihood of brittle behavior of steel components compromised by cracks from different angles.