Abstract: In an attempt to promote the application and the development of the structural reliability theory in design specifications for hydraulic structures, we systematically summarize our three decades of experiences in compiling hydraulic structure design codes which were accomplished and revised in the light of the structural reliability theory.The analytical method of reliability calibration and the principles of determining target reliability index in revising the design codes according to structural reliability theory are proposed. The determining principles and methods for the partial coefficients in design codes are put forward, and the concept and application of equivalent safety factor for the design expression of partial coefficients are presented. Moreover, the basic priciples and methods, which should be followed when comparing the safety level in design codes between China and abroad, are also proposed.The above discussions can be taken as reference when hydraulic structure design specification is revised according to structural reliability theory.

Key words: hydraulic structure, design code, reliability calibration, target reliability, partial coefficient