一种用于浅埋隧道抗震分析的拟静力数值方法

提出一种用于浅埋隧道抗震分析的拟静力数值方法，该方法用等效静载反映地震波对围岩与衬砌结构的作用，考虑地震波特点，分别计算体波（Ｐ和Ｓ波）和面波（Ｒ波）的影响，并将计算得出的衬砌反应与静载作用下的隧道衬砌的已有应力迭加视作隧道在地震时最大应力，地震波作用及静载作用的结构位移及应力均采用有限元或其它数值方法计算，提出的方法已在南昆铁路隧道抗震研究中的运用。

A Mimetic Statics Numeric Method on Earthquake Resistance Analysis of Shallow Buried Tunnels

A mimetic statics numeric method on earthquake resistance analysis of shallow buried tunnels is introduced in this paper. The effects of seismic waves are regarded as equivalent static loading on surrounding rock and tunnel lining. According to the feature of the seismic waves, the effects of body waves (P,S wave) and surface wave (R wave) should be calculated separately. The calculated stresses of seismic waves are added to the stresses of static loads as the maximum stresses in tunnel lining. FEM or other numeric methods can be used in computing the structural displacement and stress both for seismic wave and static load. The introduced method has been used in the research on earthquake resistance of the tunnels in Nanning Kunming railway project.