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中文摘要：
裂隙岩体在裂隙起裂、扩展损伤至失稳破坏过程中,同时存在损伤和断裂两种缺陷的累积和发展,且断裂又会造成损伤的进一步累积,岩体的断裂与损伤密切相关。将裂隙岩体视为含损伤连续介质,通过综合考虑压剪应力状态和拉剪应力状态下裂纹起裂、扩展损伤演化,用初始损伤张量和裂纹扩展附加损伤张量描述裂隙岩体的损伤演化过程,将压剪应力状态和拉剪应力状态下裂纹的初始损伤张量以及裂纹起裂扩展后附加损伤张量引入到自定义本构模型中,用VC＋＋开发了可模拟裂纹在各种应力状态下起裂、扩展损伤演化的自定义本构模型动态链接库（DLL）,该模型中用体积模量和剪切模量的损伤度来表示损伤。用该自定义本构模型对一隧道稳定性进行了分析。经分析发现：隧道围岩的断裂损伤范围比屈服破坏的范围大一倍左右;不考虑损伤的隧道围岩的最大位移量为0.05 m,考虑损伤的隧道围岩的最大位移量在达到0.1 m,断裂损伤区岩体的体积模量和剪切模量也有较大程度的降低。该自定义本构模型可以用来模拟裂隙岩体的损伤演化过程,模拟的结果能够为工程实践提供合理建议。
英文摘要：
The damage and rupture of fractured rock mass will accumulate and develop simultaneously during the process of its crack occurrence and growth and failure.The damage will be accumulated owing to the rupture.The damage is closely related to the rupture.Assuming the fractured rock mass as contineous mass with damage and considering the crack occurrence and growth under compressive-shear stress state and tension-shear state,the damage evolution is simulated by introducing the initial damage tensors and additional damage tensors.The two tensors are introduced into the user-defined constitutive model DLL（Dynamic Linked Library）.The model is used to simulate one tunnel.Through simulation,the damage region is about twice the yield failure region.The maximum displacement of the rock mass is 0.05 m when the damage is not considered.The maximum displacement is 0.1 m when the damage is considered.The bulk and shear moduli are reduced to some extent.The proposed model is applicable for simulating the damage evolution of the rock mass.The simulated results can provide a resonable reacommendation to the engineering practices.
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