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节理岩体剪切试验的非连续变形方法分析

wf(2015)

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Abstract
参照前人对含断续节理岩体所做剪切模型试验的结果,采用改进的非连续变形分析方法(Discontinuous Deformation Analysis for Rock Failure,DDARF)对剪切试验进行数值模拟.从破裂现象看,仿真计算和模型试验结果相符良好.随后又对断续节理做雁形排列变化,研究对比了不同阶梯状排列裂隙的模型破裂现象及相应的模型峰值剪切强度.研究结果表明,裂隙扩展的过程始于预制裂隙两端的张力裂纹,随着张力裂隙的扩大在其附近生成许多细微裂纹,这些裂纹的贯通导致了模型的最终破坏.
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Key words
numerical simulation,shear tests,DDARF,crack propagation,peak shear strength
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