王桂芳. 圆形隧道的粘弹性应力分析[J]. 工程力学, 1990, 7(1): 106-127.
引用本文: 王桂芳. 圆形隧道的粘弹性应力分析[J]. 工程力学, 1990, 7(1): 106-127.
Wang Guifang. VISCOELASTIC STRESS ANALYSIS OF CIRCULAR TUNNELS[J]. Engineering Mechanics, 1990, 7(1): 106-127.
Citation: Wang Guifang. VISCOELASTIC STRESS ANALYSIS OF CIRCULAR TUNNELS[J]. Engineering Mechanics, 1990, 7(1): 106-127.

圆形隧道的粘弹性应力分析

VISCOELASTIC STRESS ANALYSIS OF CIRCULAR TUNNELS

  • 摘要: 本文讨论圆形隧道的粘弹性应力分析问题。文中给出了在隧道围岩自重作用下,衬砌与围岩均为粘弹性材料时,求解衬砌与围岩变形及内力的一般性解答。求解的方法是:将衬砌与围岩相互作用的径向力和切向力表示成三角级数,按弹性问题分别求解衬砌及围岩的变形和内力;然后利用粘弹性——弹性对应原理,由弹性解得到粘弹性问题的解;再利用衬砌与围岩间变形的协调条件,确定衬砌与围岩相互作用之径向力和切向力级数中的系数,进而求得衬砌及围岩内力和变形的粘弹性解。

     

    Abstract: This paper deals with the problem of visoelastic stress analysis of circular tunnels,The finer and surrounding rock of the tunnel are considered to be viscoelastic materials.Taking the dead wight of the surrounding rock as external load,a general viscoelastic solution to the displacements and internal forces of the liner and surronding rock is given, The method proposed to obtain the general solution consists of three steps.First,the liner and surrounding rock are separated from each other,and the radial torce P0(θ,t)and tangential force t0(θ,t)acting upon to each other between the liner and surrounding rock are presented in triangular series.Taking consideration of the liner and surrounding rock as elastic bodies,an elastic solution to the displacements and internal forces of the liner and surrounding rock is obtained by elasticity method.Secondly,the viscoelastic solution to the displacements and internal forces of the liner and surrounding rock is obtained from the elastic solution having been found in the first step by the correspondance principle of viscoelastic-elastic.Finally,by using the deformation compatibility conditions between the liner and surrornding rock,the coefficients in triangular series of P0(θ,t)and t0(θ,t)are de-termined,and subseqently by Laplace Transform Inversion the wanted viscoelastic solution in physical space to the displacements and internal forces of the liner and surrounding rock is deduced.At the end of the paper an illustrative exmple is given.

     

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