STUDY ON 3D NUMERICAL SIMULATION OF PRESTRESSED ANCHOR CABLE AND ITS APPLICATION
Xu Qianwei1，You Chunan2，Zhu Hehua1
(1Department of Geotechnical Engineering，Tongji University， Shanghai 200092 China) (2School of Civil Engineering and Architecture，Shandon University of Science and Technology， Taian 271019 China)
Abstract：Prestressed anchor cables have been widely used as a main reinforcement method in geotechnical engineering，but existing numerical method cannot simulate their effect successfully. According to different working mechanisms between free segment and consolidated segment，a new 3D FEM is presented，which can simulate the prestress. Consolidated segment is simulated by space rod element，while the free segment use a special rod element which has two nodes and one degree of freedom. Its particular bi-linear stiffness matrix can endure unilateral tension or unilateral compression，but not moment. When the element is chosen to endure tension only，the stiffness matrix will be deleted automatically if it is under compression. This character can successfully simulate tightwire. On this basis，the load-deformation characteristics and influence factors of anchor cable and rock mass are analyzed. Therefore，the reinforcement effect and mechanism can be explored. Finally，this method is successfully used in a case.
徐前卫1 尤春安2 朱合华1. 预应力锚索的三维数值模拟及其应用研究[J]. 岩石力学与工程学报, 2004, 23(S2): 4941-4945.
Xu Qianwei1，You Chunan2，Zhu Hehua1. STUDY ON 3D NUMERICAL SIMULATION OF PRESTRESSED ANCHOR CABLE AND ITS APPLICATION. , 2004, 23(S2): 4941-4945.
2004, Vol. 23 
