强度折减有限元法中锚杆计算模型研究

Study of calculation model of anchors in strength reduction FEM

针对目前岩土工程中锚杆数值模型存在的局限性,受商用软件中锚杆强度模型的启发而提出了一种适用于强度折减有限元法的锚杆强度模型,并建议了考虑锚杆强度折减的强度折减方法,研制了相应程序。该模型应用于岩坡锚固计算,计算结果说明了模型的有效性;应用于土质边坡稳定性评估计算,结果表明模型方便可行。

Due to the limitation of the numerical models of anchors by finite element method （FEM） in geotechnical engineering at present, an anchor model which is fit for the strength reduction FEM is put forward. Strength reduction FEM considering the anchor model is proposed. The corresponding program is also developed; and the proposed model and method are tested by a case study calculation results of a simple rock slope reinforced with anchors. At last the model is used in evaluation of a soil slope stability; and the results of this example indicate that the model is convenient and feasible.