拉力型预应力锚索的应力分布研究

Research on Stress Distribution of Pre-stressed Anchoring Rope of Extensional Force Type

通过对拉力型预应力锚索力学响应的理论分析,利用弹性力学半空间体的Mindlin位移解及变形协调原理,推导了拉力型预应力锚索的内、外锚固段的剪应力分布表达式;采用分离法研究了等效锚索的等效力学参数。通过理论计算成果和文献资料的对比分析,验证了预应力锚索的内、外锚固段的剪应力分布表达式的正确性,同时讨论了锚索锚固段剪应力分布的影响因素及剪应力分布规律。

Based on a theoretical analysis of mechanics response of pre-stressed anchoring rope of extensional force type, Mindlin＇s solution of displacement of semi--infinite space and deformation harmonizing principle is used to deduce the expressions of shear stress along the inner and outer anchorage zone. Equivalent mechanic parameters of anchoring rope are studied by using the separate method. By comparing calculated results based on the expressions suggested in this paper and the correctness of expressions of shear stress along the inner and outer anchorage zone is proved. Meanwhile the distribution law of shear stress and factors influencing shear stress is discussed.