보강토옹벽의 신뢰성 해석에 관한 연구 = A Study on Reliability Analysis of Reinforced Earth Retaining Walls

다국어 초록 (Multilingual Abstract)

Current reinforced erath retaining wall design is bared on limit equilibrium analysis, but the reliability based design method is more rational than limit equilibrium analysis. For this reason, this study proposes a reliability based design criteria for the reinforced earth retaing wall, and also proposes the theoretical bases of nominal safety factors of stability analysis by intrducing the reliability theory.
The limit state equations of stability analysis and design of each part of reinforced earth retaining wall are derived and the uncertainly measuring algorithms of each equations are also derived by external stability analysis and internal stability analysis of reinforced earth retaining wall.
As a result, the target reliability indeces(overturning:βo=3.27,sliding:βo=2.47, bearing capacity:βo=1.94, tie-back:βo=3.26) are selected as optimal values considering our practice based on calibration with the currenr reinforced earth retaining wall design safety provisions. Load and resistance factors are measured by using the proposed uncertainties and the selected target reliability indices. Furthermore, a set of norminal safety factors (over turning: FS=2.07, sliding: FS=1.87, bearing capacity: FS=1.92, tie-back: FS=1.89) are proposed for the reinforced earth retaining wall current design safety provisions.