Abstract: For the sake of avoiding crane safety accidents in large-scale projects, a model was built to measure the non-probabilistic reliability of crane boom structures. By using the non-probabilistic reliability theory of convex model, a representative convex model is constructed and the model was called generalized infinite norm model at first. The model was used to define the non-probabilistic reliability indicators. Then, the uncertainty parameters affecting the non-probabilistic reliability of the boom structure was analyzed. Lastly, based on the convex model, the non-probabilistic function was brought into the non-probabilistic reliability index so that the non-probabilistic reliability of the boom structure can be obtained. The model was used to analyze the boom structure of a certain crawler crane in some enterprise. The results show that evaluation of the non-probabilistic reliability of the boom structure by using the model conforms with the reality.

Key words: convex model, crane boom, non-probabilistic, reliability, failure function, reliability index