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Method for evaluation of concrete containment structure subjected to earthquake excitation and internal pressure increase

机译：地震激励和内压增加下混凝土围护结构评估方法

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This study evaluates capabilities of the VecTor4 computer program to assess the seismic performance of a concrete containment structure subjected to both design-basis and beyond design-basis earthquakes. Based on a detailed nonlinear finite element model of the nuclear power plant containment structure, the seismic performance in terms of stress and strain distributions, cracks, yielding of reinforcement bars and tendons, as well as overall failure mechanism, is thoroughly reviewed. In addition, the post-seismic performance of the containment structure subjected to a subsequent pressure increase is also investigated. Consideration is also given to the time-dependent parameters of creep, shrinkage, and relaxation of prestressing tendons. It is found that the time-dependent parameters and earthquake have a non-negligible impact on pressure-induced structural performance but that this impact can be predicted for a given earthquake. The proposed method is useful for assessing the progressive failure behaviour of containment structure under chain events.
机译：这项研究评估了VecTor4计算机程序评估混凝土安全壳结构抗震性能的能力，这些安全壳结构既承受设计基准地震，又承受设计基准地震以外的地震。基于核电厂安全壳结构的详细非线性有限元模型，从应力和应变分布，裂缝，钢筋和钢筋的屈服以及整体破坏机理等方面对地震性能进行了全面的回顾。另外，还研究了安全壳结构在随后的压力增加后的抗震性能。还考虑了预应力筋的蠕变，收缩和松弛随时间变化的参数。发现时变参数和地震对压力诱发的结构性能的影响不可忽略，但是对于给定的地震可以预测这种影响。所提出的方法对于评估链状事件下安全壳结构的渐进破坏行为很有用。

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