Numerous researches were conducted to explore the response of a pipe or tunnel to fault-induced deformation, most of which concentrated on strain distribution and failure mechanism. In this study, both centrifuge and numerical modeling are performed to investigate the active lengths of stainless steel pipes and concrete tunnels subjected to reverse faulting. The active length is assumed as the part of a pipe or tunnel with different displacements from the surrounding soil. Two centrifuge tests of pipes are conducted to validate the three-dimensional beam-spring model. Parametric studies are performed to investigate the active length of a structure (continuous pipe or tunnel) in reverse fault and its influence factors. The results showed that the active length depends on fault deformation, size of the structure (diameter and diameter to thickness ratio), material properties of structure (Young's modulus and yielding stress), burial depth, and frictional angle of sand. The active length has a positive correlation with relative structure-soil stiffness. The relationship of active length and relative structure-soil stiffness is obtained by a comprehensive parametric study with 960 finite elements.

进行了大量研究以探讨管道或隧道对断层引起的变形的响应，其中大部分集中在应变分布和破坏机理上。在这项研究中，进行了离心和数值模拟，以研究遭受反向断裂的不锈钢管和混凝土隧道的有效长度。有效长度假定为与周围土壤位移不同的管道或隧道的一部分。进行了两次管道离心测试，以验证三维梁弹簧模型。进行参数研究以研究反向断层中结构（连续管或隧道）的有效长度及其影响因素。结果表明，有效长度取决于断层变形，结构的尺寸（直径和直径与厚度的比率），结构的材料特性（杨氏模量和屈服应力），埋藏深度和砂土的摩擦角。有效长度与相对的结构-土壤刚度呈正相关。有效长度与相对结构土刚度的关系是通过对960个有限元进行的综合参数研究得出的。