Abstract Underground structures are more vulnerable to faulting than earthquake shaking. However, there are no effective mitigation measures for the damages of underground structures subjected to normal faulting. This study proposes a novel structure for new subway stations to mitigate the normal fault induced damages. The novel subway station consists of a rectangular cross-section and two rigid diaphragm walls. The diaphragm walls are made of reinforced concrete, connecting with the bottom corners of the structure. A series of analyses was conducted by finite elements, which had thoroughly validated in previous studies. The results show that the responses of the novel structure depend on fault throw, its location relative to the rupture, soil depth, burial depth, and the length of diaphragm walls. The presence of diaphragm walls substantially reduces the structure rotation in two ways: (1) obtaining skin friction from surrounding soil to conquer the rigid body rotation, and (2) restraining differential soil displacements underneath the bottom slab.

中文翻译：

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一种减轻正常故障引起的损害的新型地铁车站结构分析

摘要 地下结构比地震更容易受到断层的影响。然而，对于受正断层影响的地下结构的破坏，目前还没有有效的缓解措施。本研究为新地铁站提出了一种新型结构，以减轻正常故障引起的损坏。新型地铁站由一个矩形横截面和两个刚性连续墙组成。连续墙由钢筋混凝土制成，与结构的底角连接。一系列分析是通过有限元进行的，这在之前的研究中已经得到了彻底的验证。结果表明，新结构的响应取决于断层距、其相对于破裂的位置、土壤深度、埋藏深度和连续墙的长度。