Numerical Analysis Method for Liquefaction-induced Damage Evaluation to Railway Structure

초록

This study aimed to suggest a method for assessing the liquefaction-induced damage to railway embankments, one of the major national SOC infrastructures. To achieve that purpose, the railroad design and maintenance standards in South Korea were examined, and risk assessment method was proposed. The risk assessment of liquefaction-induced damage was classified into no damage level, caution level, and critical level based on the assessment of vertical irregularity, residual settlement, and lateral displacement. To assess the liquefaction-induced damage, three simplified assessment methods and a dynamic numerical analysis method with a finite difference method were proposed. Finally, these methods were applied to the roadbed of the Honam high-speed line, and its applicability was investigated. According to the results, the related standards showed the most overestimated value of settlement among the simplified assessment methods, and the dynamic numerical analysis technique showed the most underestimated value of settlement.

키워드