应用有限单元法探讨预应力岩锚的作用
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摘要
探讨了平面及空间非线性有限单元法在预应力锚索加固岩体的研究中的应用，在程序中采用双弹簧单元和空间弹簧单元来模拟锚索和胶结体之间的粘结—滑移特性．提出了“预锚附加应力场”的概念，研究了附加应力场的具体分布形态和影响因素，认为预锚加固作用的实质不仅仅在于提供直接平衡力，更在于加强岩体结构，并调整和改善岩体应力状态
Application of 3 D nonlinear finite element method to the study of reinforcing effect of prestressed anchored steel rope is discussed.3 D spring elements are used to describe the coherence and slide between steel rope and concrete.The concept of reinforcing additional stress is introduced,and the feature and influencing factors of the stresses are studied.It is concluded that the prestressed anchored steel rope system not only provides balance force but also reinforces rock structure and improves the state of stress.
Application of 3 D nonlinear finite element method to the study of reinforcing effect of prestressed anchored steel rope is discussed.3 D spring elements are used to describe the coherence and slide between steel rope and concrete.The concept of reinforcing additional stress is introduced,and the feature and influencing factors of the stresses are studied.It is concluded that the prestressed anchored steel rope system not only provides balance force but also reinforces rock structure and improves the state of stress.
引文
1 中国岩土锚固工程协会.岩土工程中的锚固技术.北京:地震出版社,1992.27～31
2 滕智明,罗福午,施岚青.钢筋混凝土基本构件.北京:清华大学出版社,1987.357 ～367
3 龚尧南,王寿梅.结构分析中的非线性有限元素法.北京:北京航空学院出版社,1986.116～119
4 沈聚敏,王传志,江见鲸.钢筋混凝土有限元与板壳极限分析.北京:清华大学出版社,1993.240～244
2 滕智明,罗福午,施岚青.钢筋混凝土基本构件.北京:清华大学出版社,1987.357 ～367
3 龚尧南,王寿梅.结构分析中的非线性有限元素法.北京:北京航空学院出版社,1986.116～119
4 沈聚敏,王传志,江见鲸.钢筋混凝土有限元与板壳极限分析.北京:清华大学出版社,1993.240～244
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