During the Kobe earthquake in 1995, Daikai subway station suffered the severe collapse, which aroused people's more attention to the earthquake damage response of underground structures. In order to investigate the seismic failure mechanism of underground frame structures, a series of 1/50-scaled dynamic centrifuge tests were conducted. To make the underground structures produce a reasonable seismic failure mode in tests, an experimental scheme was designed in detail based on the author's previous numerical studies. With the purpose of simulating the vertical inertial effect of the overburden soil in the dynamic centrifuge tests, a certain proportion of steel grits were mixed into the overlying soil. A model structure finally occurred the overall collapse mode, which was similar to that of Daikai subway station. Based dynamic centrifuge tests, the seismic failure mechanism of shallow buried underground frame structure was analyzed and summarized in the paper. It could offer a reference for the cause of collapse of Daikai subway station. The series of tests provided valuable experimental data for further studies of the earthquake damage response of underground frame structures, and also enriched the testing technique for destructive model tests.

1995年神户地震期间，大开地铁站发生严重倒塌，引起人们对地下结构震害响应的更多关注。为了研究地下框架结构的地震破坏机制，进行了一系列1/50比例的动态离心试验。为使地下结构在试验中产生合理的地震破坏模式，在作者前期数值研究的基础上，详细设计了试验方案。为模拟动态离心试验中上覆土的垂直惯性效应，将一定比例的钢砂混入上覆土中。一个模型结构最终出现了整体倒塌模式，类似于大开地铁站的倒塌模式。基于动态离心试验，对浅埋地下框架结构的地震破坏机理进行了分析和总结。可为大开地铁站坍塌原因提供参考。该系列试验为进一步研究地下框架结构的地震破坏响应提供了宝贵的试验数据，也丰富了破坏性模型试验的试验技术。