【摘要】 现场调查表明:汶川大地震震区隧道结构受到比较严重的破坏,严重影响了灾区救援和重建,可见传统的隧道抗震技术已不能保证高烈度地震区隧道结构的安全,为此利用波动理论对隧道减震层减震模型进行研究,推导地震波沿隧道结构轴线方向作用下的减震计算公式,研究减震层厚度、减震层弹性模量、减震层刚度和地震波输入频率等参数对隧道减震效果的影响,并通过室内模型试验验证隧道减震层减震模型的减震效果。研究成果可为高烈度地震区隧道结构减震设计提供参考。更多还原

【Abstract】 Field investigation revealed that tunnel structures were seriously damaged in the Wenchuan earthquake,seriously affecting disaster relief and post-disaster reconstruction.Traditional anti-seismic technology can not guarantee the safety of tunnel structures.This paper presents a study of the damping model of tunnel shock absorption layer by using wave theory.The calculation formula of tunnel damping in the axial direction was derived,and the thickness,elastic modulus and stiffness of shock absorption layer,and the effect of seismic input frequency on damping are studied.Through laboratory model test,the damping effect is proved.The results may provide reference for earthquake-reduction design of tunnel structures in highly seismic areas.更多还原