Reliability Analysis of UHPC Bridge Deck Performance under Complex Stress State

Abstract The combination parts of steel‐concrete composite beams are often subjected to complex stress state, and its performance assessment is particularly important. And the reliability method is an effective method to assess UHPC bridge deck performance in complex stress state. In this paper, six sigma method is used to analyze the reliability of the negative moment zone of steel‐concrete composite beams, and a limit state equation is established with tensile stress and deformation as the control conditions. The analysis results show that reliability analysis can effectively assess the performance of concrete bridge panels, including tensile, compressive and bending properties. Reliability analysis is a necessary way to improve the reliability of UHPC bridge decks, and the six Sigma method is an effective method to analyze the reliability of UHPC bridge decks.