Study on the Seismic Reliability of Steel Containment
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Abstract
In recent years, more and more high-power nuclear power plants were constructed in China to meet the increasing needs of electricity. The volume of the containments in nuclear power plants increases with the increase of the power level. Therefore, accessing the ability of steel containment to resist strong earthquakes has attracted more attention recently. So far, the most seismic analysis methods are based on deterministic methods. In fact, the parameters in the engineering projects, such as geometry, material and load value, are usually uncertain. The seismic loads aslo have a complex statistical change, which is one of the natural properties of seismic wave. Therefore, the traditional deterministic methods are difficult to verify the safety of the structure. In this article, the seismic reliability of the large steel containment was studied. The random seismic response spectrum under different probabilities was established according to the stationary stochastic model. The parameters of the stationary stochastic model were obtained from Chinese seismic code. Two methods of seismic reliability analysis were considered. One is under deterministic seismic intensity, the other is under the certainty probabilities. Finally, the sensitivity parameters were calculated based on the Monte Carlo method. This article will provide some references for the seismic reliability design of the steel containment.
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