ABSTRACT

Crane is the supporting equipment in the construction of engineering projects, thus ensuring its safe operation has become an important work. The critical load-bearing part, steel structure, in case of failure can affect reliable operation of the whole crane. Therefore, steel structure is chosen as the study object. First of all, we construct the testing system and data-integration platform to collect running data. Then, the article focuses on establishing the index system of safety assessment, determining the weight of each index based on the Analytic Hierarchy Process (AHP), and obtaining the membership matrix by utilizing the Fuzzy Theory. On this basis, we evaluate the safety level of its current state, and further express the possibility of each safety level occurring by probability form. Finally, we introduce the parameter, transition probability between different safety states, and build the model predicting future safety state of steel structure.