预应力锚索内锚段有限元精细化模拟

Study on Inside Anchor by Detailed Finite Element Method

预应力锚索加固作为岩土工程的一种主要加固技术已得到日益广泛的应用,但现有的预应力锚索数值模拟方法却不能很好地反映其实际加固效果。针对预应力锚索内锚段模拟存在的难点问题,提出用精细化有限单元法进行模拟。该算法最突出的特点是详细地描述了钢绞线、砂浆和接触面等细部结构。算例表明,这种方法是合理和有效的,内锚段轴向位移和应力沿钢绞线方向由外到里呈指数性衰减。

Prestressed anchor cable have been widely used as a main reinforcement method in geotechnical engineering.But the prestressed anchor cable＇s effect cannot be simulated successfully by existing numerical method.In light of the simulation problems on the inside anchor of pre-stressed anchor cable,detailed finite element method was presented to simulate it.The most remarkable feature of the algorithm is that it can describe stranded wire,grout,interfaces,and other detailed structures.Numerical example is carried out to show the validity and robustness of the method.Axis stress and displacement distribute like exponential decay from outside to inside along stranded wire,which is similar to the rule of field monitoring.