long-term loads;  clefting;  reliability;  Short-term loads

The creep and shrinkage of concrete are the main influencing factors for the expansion of crack width of concrete structures under long-term loading. Due to the influence of environmental conditions, it has a large uncertainty in hydraulic structures, and there is no unified understanding and reasonable consideration method for the reliability of hydraulic concrete structural components. In order to correctly analyze and calculate the reliability of crack limitation of hydraulic structures under long-term loading, the influence of concrete shrinkage and creep variation on the cross-section indeterminacy of long-term load statistical uncertain members is discussed from many aspects, and the reliability analysis is carried out by using the normal service limit state "resistance-load effect conversion model". The results show that the reliability of cracking limitation of hydraulic structures under long-term loading is higher than that of general building structures. The reliability principle of the crack calculation formula of hydraulic concrete structural members is different