Reliability analysis-based foundation seismic isolation structure system optimization method
A technology for basic isolation and optimization methods, applied in design optimization/simulation, instrumentation, geometric CAD, etc., and can solve the problem of high cost
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Embodiment 1
[0073] This embodiment provides a method for optimizing a base-isolation structure system based on reliability analysis, including the following steps:
[0074] Reliability calculation steps: calculate the random seismic response of the base-isolated structural system through the dynamic equation, as a random variable; according to the equivalent extreme value event criterion, construct the dynamic reliability of the base-isolated structural system based on the structural response physical quantity concerned degree calculation process; according to the dynamic reliability calculation process combined with the motion control equation, using the probability density evolution theory, using the probability density evolution equation to solve, calculate the overall reliability of the base isolation structure system;
[0075] The step of optimizing the parameters of the base-isolated structure system: constructing a probability criterion based on the overall reliability of the base-i...
Embodiment approach
[0101] As a preferred implementation, the method for optimizing the base isolation structure system also includes:
[0102] The step of determining key design parameters: through variance sensitivity analysis, calculate the total effect index of each random input variable of the base isolation structure system, and use the random input variable with the highest total effect index as the key design parameter; the total effect index includes The individual contribution of a random input variable to the corresponding variance of the structure and its cross-contribution with other random input variables;
[0103] In the step of optimizing the parameters of the base isolation structure system, parameter optimization is performed on the key design parameters.
[0104] In the key design parameter determination step, the calculation expression of the total effect index of the random input variable is:
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