Abstract
The research objective is to design and construct a method for functional reliability analysis of concrete gravity dam. Firstly, the pseudo excitation method was utilized to analyze to calculate the probabilistic characteristics of concrete gravity dam excited by random seismic loading. Meanwhile, the response surface method based on weighted regression was associated to that method to analyze functional reliability of concrete gravity dam. Eventually, a test example was given to verify and analyze the convergence and stability of this method.
Highlights
The basic purpose of structural reliability analysis is to obtain the probabilistic responses of structural systems with uncertain design parameters, such as loadings, material parameters, and shape dimensions
The pseudo excitation method was utilized to analyze to calculate the probabilistic characteristics of concrete gravity dam excited by random seismic loading
The response surface method based on weighted regression was associated to that method to analyze functional reliability of concrete gravity dam
Summary
The basic purpose of structural reliability analysis is to obtain the probabilistic responses of structural systems with uncertain design parameters, such as loadings, material parameters (strength, elastic modulus, Poisson’s ratio, etc.), and shape dimensions. In order to overcome the above defects, some reliability methods use polynomial response surface function to fit implicit limited state function, but the number of basic random variables is very large when analyzing large structures These reliability methods need more experimental points to confirm the indeterminate coefficients of these basic random variables. When solving the high degree random differenttial equations, they all faced unacceptable computational efforts Compared to these algorithms, Lin [25] proposed a pseudo-excitation method, which was an accurate and highly efficient algorithm series for linear structural stationary random response analysis, to deal with dynamic response of structures subject to random seismic excitation. A test example is utilized to verify and analyze the convergence and stability of the proposed method
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