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A numerical model of fully grouted bolts considering the tri-linear shear bond-slip model

机译:考虑三线性剪力滑移模型的全灌浆螺栓数值模型

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A numerical model of fully grouted bolts is proposed in this study by implementing the tri-linear bond slip relationship of bolts into the numerical framework presented by Hyett et al. (1996). The bond-slip relationship of bolt-rock interface is simplified and represented by the tri-linear model. The proposed numerical model is characterized by (1) its ability in modeling decoupling mechanism of bolt-rock interface, i.e. the degradation of the interfacial shear bond stress along bolts; (2) its easy implementation in a numerical code. The proposed numerical model is verified with the pullout tests, and good agreements with the experimental results can be observed in terms of axial stress distributions in the bolt, shear stress distributions along the bolt and load-displacement relationship. The proposed model also gives a reasonable prediction on the behavior of bolts installed in the field. (C) 2016 Elsevier Ltd. All rights reserved.
机译:通过在Hyett等人提出的数值框架中实现螺栓的三线性粘结滑移关系,在本研究中提出了全灌浆螺栓的数值模型。 (1996)。螺栓-岩石界面的粘结-滑移关系得到简化,并用三线性模型表示。所提出的数值模型的特点是:(1)能够模拟螺栓-岩石界面的解耦机理,即沿螺栓的界面剪切粘结应力的退化; (2)它易于在数字代码中实现。通过拉拔试验验证了所提出的数值模型,并在螺栓的轴向应力分布,沿螺栓的剪应力分布和载荷-位移关系方面与实验结果吻合良好。提出的模型还对现场安装的螺栓的性能给出了合理的预测。 (C)2016 Elsevier Ltd.保留所有权利。

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