砂浆锚杆的有限元模拟方法探讨

针对现有砂浆锚杆有限元模拟方法的局限性与不足，在深入探讨砂浆锚杆的力学机理的基础上，提出了一种包含锚杆、砂浆以及接触面的新型复合锚杆单元，该单元不仅能反映锚杆的轴向受力作用，还能反映锚杆的抗弯以及锚杆与岩体接触面的剪切滑移效应，并利用有限元基本理论，推导了新型复合锚杆单元刚度矩阵及相关计算公式，并编制了相应的计算程序，工程实例分析表明：模型能够满足工程要求，具有一定的理论与工程实用价值。

Discussion on Simulation of Finite Element Method for Grout Bolt

In view of the limitation and shortage of simulation of current finite element approaches for grout bolt, an new composite bolt element including bolt and grout as well as interface is established based on in-depth exploration of mechanics mechanism of grout bolt. This new element can simulate not only the behav ior of grout bolt under the axial force but its bending capability along with effect for shearing slippage. Then element stiffness matrix of the new element and some correlative formula are deduced. An engineering example is analyzed with the relevant element can meet the need of computer program developed in this text and its results indicate that this new engineering and that have value of theory and engineering.