The Research Of Reliability Assessment Of Existing Water-structure And Strategy Of Maintenance And Strengthenin

In the present, the structural reliability of service research is more depth on materials and components, but is still in the exploratory stage at the structure of system-level research. A structure usually is composed of many simple components, and has a wide range of damage (failure/invalidation) modes. Therefore, it should analyse the structural reliability based on point of view of system, namely, on the structural system reliability analysis. At the same time, the reliability of engineering structures to serve the purpose of theoretical study, are reinforced or modified for the repair and provide a theoretical basis for decision-making. In this paper, two areas are studied, which is the following work: Firstly, the background of the service structure and system reliability, the development history of structural reliability (including the system reliability), and service commonly used method of calculating structural reliability analysis of the basic characteristics and the basic principles are discussed. Furthermore, the basic concepts of reliability of structure and the algorithms of the system reliability are introduced. Taking into account the hydraulic data are often large and complicated three-dimensional structure, and in order to not lose accuracy and to improve computational efficiency, the step-by-step focus on the equivalent linear method that Johnson efficient intersection algorithm is discussed. Secondly, the calculation methods of structural system reliability at multiple authentication models and a variety of invalidation modes of the service structure are studied, and a new dot estimate algorithm for calculating system reliability of service structure is proposed, and an example for the algorithm is given. Thirdly, the repair service structure reinforcement decision analysis model and optimization model, repair reinforcement investment analysis models and dynamic economic analysis model are produced based on dynamic reliability of the service structure by using input-output of the investment decision-making methods. Moreover, an economic discriminant method for investment is given. Finally, the reliability evaluation of the service hydraulic embankment project and the decision-making analysis of reinforcement are processed.