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Performance-based earthquake engineering methodology for seismic analysis of nuclear cable tray system

机译:基于性能的核电缆托盘系统地震分析地震工程方法

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The Pacific Earthquake Engineering Research (PEER) Center has been developing a performance-based earthquake engineering (PBEE) methodology, which is based on explicit determination of performance, e.g., monetary losses, in a probabilistic manner where uncertainties in earthquake ground motion, structural response, damage estimation, and losses are explicitly considered. To carry out the PEER PBEE procedure for a component of the nuclear power plant (NPP) such as the cable tray system, hazard curve and spectra were defined for two hazard levels of the ground motions, namely, operation basis earthquake, and safe shutdown earthquake. Accordingly, two sets of spectral compatible ground motions were selected for dynamic analysis of the cable tray system. In general, the PBEE analysis of the cable tray in NPP was introduced where the resulting floor motions from the time history analysis (THA) of the NPP structure should be used as the input motion to the cable tray. However, for simplicity, a finite element model of the cable tray was developed for THA under the effect of the selected ground motions. Based on the structural analysis results, fragility curves were generated in terms of specific engineering demand parameters. Loss analysis was performed considering monetary losses corresponding to the predefined damage states. Then, overall losses were evaluated for different damage groups using the PEER PBEE methodology.
机译:太平洋地震工程研究(同行)中心一直在开发基于性能的地震工程(PBEE)方法,这是基于以概率的方式明确地确定性能,例如货币损失,其中地震地面运动的不确定性,结构应答明确地考虑了损害估计和损失。为了为核电厂(NPP)的组件进行对等PBEE程序,例如电缆托盘系统,危险曲线和光谱定义为两个危险水平的地面运动,即运营基地震,安全关闭地震。因此,选择两组光谱兼容地运动以进行电缆托盘系统的动态分析。通常,引入了NPP中电缆托盘的PBEE分析,其中来自NPP结构的时间历史分析(THA)的得到的底板运动应用作电缆托盘的输入运动。然而,为简单起见,在所选地面运动的效果下为THA开发了电缆托盘的有限元模型。基于结构分析结果,在特定工程需求参数方面产生脆弱曲线。考虑到对应于预定义损害状态的货币损失进行损失分析。然后,使用对等PBEE方法进行不同损伤组评估总体损失。

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