2014-01-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/680291摘要：這個三年期研究的目標，在於探討具有空間變異性的土體或岩體的破壞機制：究竟土體或岩體的整體剪力強度，是由巨觀抑或微觀的空間變異性主控？本研究挑戰長久以來先前研究的一個錯誤假設：『整體剪力強度=空間平均值』；本研究的成果對於傳統土壤力學與岩石力學，應有相當程度之貢獻。在整個研究的規劃中，將利用隨機場（random field）模擬土體或岩體剪力強度的空間變異性，並進一步利用有限元素分析（finite element analysis）或是分離元素法（distinct element method）模擬整體剪力強度。基於模擬的結果，建立整體剪力強度與巨觀與微觀空間變異性的關係。最後，藉由分析的結果，針對具空間變異性之邊坡與基礎的設計提出具體建議。<br> Abstract: The proposed three-year research concerns with the actual failure mechanism in a spatially variable soil/rock mass. The main concern is whether the overall shear strength of a soil/rock mass is governed by microscopic or macroscopic feature of the spatial variability. This research challenges an incorrect assumption of “overall shear strength = spatial averaging” that is mistakenly adopted in some literature and may have significant contributions to classical soil/rock mechanics if successfully conducted. In the proposed research, spatial variability of soil/rock mass will be modeled as random fields, and finite element and distinct element analyses will be taken to simulate the overall shear strength. Based on the simulation results, the link between the simulated overall shear strength to the microscopic and macroscopic features will be explored. The analysis results will be used to further derive design guidelines for slopes and foundations in spatially variable soils and rocks.空間變異性大地工程破壞機制邊坡基礎spatial variabilitygeotechnical engineeringfailure mechanismslopesfoundations