加锚节理岩体的损伤增韧止裂模型研究

Study on Toughening of Jointed Rock Masses Reinforced With Bolts

本文针对加锚节理岩体特点，采用等效抹平的处理方法，从损伤加筋体的自一致理论出发，推求加锚节理岩体的等效柔度张量和损伤张量，并运用脆性类材料的损伤增韧止裂理论，依据加锚节理裂纹的断裂扩展过程建立损伤演化方程，给出了此类加锚岩体的本构关系。

According to the feature of jointed rock masses,a computational model of toughening of rock masses re-inforced with belts is presented in this paper. Based on the self-consistent principle in reinforced damaged solid,theequiva-lent flexibility tensor and damage tensor for the jointed rock masses reinforced with bolts are deduced by usingthe equivalently smearing method With the help of the theory of toughening in brittle materials,the damage evolu-tion equation is established based on the fracture propagation process of bolted joint cracks. Finally,a constitutive re-lation is proposed for this kind of rock mass.