This study proposes a practical fragility estimation equation for Japanese standard models of railway embankments using the peak ground acceleration, peak ground velocity, and Arias intensity. The analytical models were implemented as unreinforced and geosynthetic-reinforced embankment models. A sensitivity analysis of the seismic fragility estimation of the embankment models was conducted on various embankment heights, average values of friction angles in the backfill soil, and tensile strengths of the primary reinforcement. Consequently, a unique formula for the fragility function in the presence of different seismic intensities was successfully presented. The parameters of the fragility function were successfully estimated using commonly used design parameters, such as the embankment height, average value of the friction angle of the backfill soil, and average value of the tensile strength. Additionally, another sensitivity analysis using different seismic databases was conducted to explore the effect of the seismic database on the fragility curve estimation of railway embankments. As a result, using different seismic databases, different fragility curves were obtained. These results highlight the importance of checking the sensitivity of the seismic database when developing the fragility curve.

本研究使用峰值地面加速度、峰值地面速度和 Arias 强度为日本标准铁路路基模型提出了一个实用的脆弱性估计方程。分析模型被实施为非加固和土工合成加固路堤模型。对不同的路堤高度、回填土中摩擦角的平均值和主钢筋的抗拉强度进行路堤模型的地震脆弱性估计的敏感性分析。因此，成功地提出了在不同地震强度下的脆弱性函数的独特公式。使用常用的设计参数，如路堤高度、回填土摩擦角平均值，抗拉强度平均值。此外，还使用不同的地震数据库进行了另一次敏感性分析，以探讨地震数据库对铁路路基脆弱性曲线估计的影响。因此，使用不同的地震数据库，得到不同的脆性曲线。这些结果突出了在开发脆性曲线时检查地震数据库灵敏度的重要性。