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Statistical numerical method for determining seismic performance and fragility of shallow-buried underground structure

机译：确定地震性能和浅埋地下结构脆弱性的统计数值方法

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摘要

Currently, research on the underground structures seismic fragility is still in its infancy state. In this study, we carried out numerical simulation on soil-underground structure system (SUSI) by taking the Daikai metro station damaged in the Kobe earthquake as analysis object. Considering input ground motion characteristics, based on incremental dynamic analysis (IDA method), a statistical numerical modeling method was established to classify underground structure seismic damage status and its seismic performance level. The analysis results showed that the input ground motions had a significant effect on the IDA curves. The rationality and randomness of the selected ground motions were important influencing factors to ensure the underground structures seismic fragility curves. In relation to the damage that occurred to the Daikai station in 1995, the peak ground acceleration (PGA) and peak relative lateral displacement (PRLD) of the site were suitable for estimating the seismic performance of the shallow buried structure constructed. Finally, the seismic fragility curves were compared with the existing research results, and a seismic damage assessment was carried out, which verified the effectiveness of the statistical numerical modeling method developed in this study.
机译：目前，对地下结构地震脆性的研究仍处于初期状态。在这项研究中，我们通过将神户地震损坏的Daikai地铁站作为分析对象进行了对土地地下结构系统（Susi）的数值模拟。考虑基于增量动态分析（IDA方法）的输入接地运动特性，建立了统计数值建模方法，以分类地下结构地震损伤状态及其地震性能水平。分析结果表明，输入接地运动对IDA曲线具有显着影响。所选地面运动的合理性和随机性是重要的影响因素，以确保地下结构地震脆弱曲线。关于1995年的大海站发生的损害，该部位的峰接地加速度（PGA）和峰相对横向位移（PRLD）适用于估计构造的浅埋结构的地震性能。最后，将地震脆性曲线与现有的研究结果进行了比较，进行了地震损伤评估，验证了本研究中开发的统计数值模拟方法的有效性。

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