顺层边坡岩体初始后屈曲性态及其缺陷敏感性
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摘要
应用Koiter的初始后屈曲理论,视作用于顺层边坡岩体结构上的法向分力为初始缺陷,以探讨非完善系统的不稳定性。给出了边坡岩体分叉点附近的邻域,建立了一般情形下边坡岩体分叉点的平衡构形判据,以及后屈曲平衡路径和后屈曲平衡构形的稳点性准则。证实了结构初始缺陷对屈曲的影响与突变理论在揭示结构临界平衡性态时的一致性。提供了一定条件下确定非完善结构位移场的一种方法。
Using Koiter′s theory of initial post-buckling,and considering normal component force acted on side slope with bedding rock mass as initial imperfection,the unstability of imperfection system is studied.Nearby region at bifurcation point of rock mass slope is derived;the stability criteria of side slope relating to equilibrium path of post-buckling,equilibrium configuration of bifurcation point and post-buckling are established in the form of general side slope.It is shown that exploring critical equilibrium behavior of rock mass slope,influence of structural initial imperfection on post-buckling is in accordance with some conclusions of cusp catastrophe theory,and a method of determining displacement field of imperfection structure is presented on some condition.
引文
[1]肖远.用岩层梁代替岩层板分析顺层岩体边坡结构变形破坏的条件[C].//水文地质与工程地质勘查院.第二届全国工程地质力学青年学术讨论会论文集.北京:地震出版社,1992:79-83.
    [2]范钦珊.初始后屈曲理论及其应用[C].//中国力学学会.材料和结构的不稳定性.北京:科学出版社,1993:55-69.
    [3]李云鹏,杨治林,王芝银.顺层边坡岩体结构稳定性位移理论[J].岩石力学与工程学报,2000,19(6):747-750.
    [4]孙广忠.岩体结构力学[M].北京:科学出版社,1988.

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