The longitudinal stresses in the tunnel structure calculated by using the model of tamura & okamoto are obviously greater than the stresses in transverse direction obtained by using two dimensional finite element analysis . it is proposed that the axial and bending stresses should not be ignored for the underground structural design 计算结果表明，由弹簧质量模型算得的地下结构在地震作用下纵向振动和横向振动产生的纵向和弯曲正应力及剪应力明显高于由二维平面有限元算得的横向平面内产生的正应力和剪应力，由此可见轴向应力和弯曲应力是地下结构抗震设计中不容忽视的因素。
