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岩盤構造物の安全な設計・施工には，岩盤不連続面のせん断挙動の解明が重要とされている．また，岩盤構造物を建設する際には，多くの費用と時間を要す事前調査が必要となる．そこで本研究は，岩盤不連続面のせん断挙動の解明を目的とし，直接一面せん断試験についての3次元シミュレーション解析を行った．解析では，個別要素法に，引張力を表すことのできるボンディング理論を導入したものを用いている．また，自然な不連続面を有する供試体を解析モデルとし，ボンディングの破断状況やせん断応力分布の可視化によって，せん断挙動のシミュレーションを行っている．さらに，実験との比較を行うことで，本解析手法の有用性の検討を行っている． \n As is known, it is important to clarify the shear behavior of rock joint for the safty construction of rock structures. In this paper, the three dimentional simulation analysis of direct shear testing using distinct element method have been done. Especially, to reprent the tensile stress in rock mass, we tried to be applied on the bonding theory. As the results of this study, it is recognized that the results of this simulation with that of experiment.

In this paper, simulation analysis for shearing mechanism of rock joint by Distinct Element Method is performed. The purpose of this study is to analyze the sliding and shearing behavior of discontinuity surface in the shear process and destruction locations of the roughness is tried to be clarified by numerical simulation. The characterization of this simulation model can be applied on bonding force between particles. As the results of this study, it is recognized that the shearing and sliding behavior of discontinuous plane using this simulation model correspond with the experimental results and that this simulation model are useful. The distribution of internal stress during shear on discontinuity plane can be visualized.