3-D numerical simulation on seismic behavior of variable cross-section subway station structure in complex geological ground

作者：Chen Su; Tang Baizan; Liu Aiwen; Chen Guoxing; Li Xiaojun

来源：地震地磁观测与研究, 2016, 37(5).

DOI：10.3969/j.issn.1003-3246.2016.05.007

• numerical simulation
• variable cross-section subway station structure
• seismic response behavior
• spatial effect

Based on the explicit ifnite method of ABAQUS software and the 96CPU parallel computing cluster platform, the 3-D numerical simulation on soft soil-variable cross-section subway station structure is performed to research the different nonlinear seismic response of the model respectively under Kobe and Mex ground motions as well as Nanjing artiifcial wave which takes the probability of exceedance as 3% within 100 years. The results show that the peak acceleration of soil in which upper the subway station is less than other place on the ground surface, the phenomena of high frequency ifltering and low frequency ampliifcation effect of the soft soil were observed underground motions. When earthquake pass through the underground structure, complex propagation behavior, such as scattering and diffraction occurred. Variable cross-section subway station structure, which has a narrow base shows more serious seismic response on the sub-layer of structure than that in up-layer of structure. In the sub-layer, the interior column was the weakest member, the peak stress of the interior column was greater than that in side wall and crest slab. In the up-layer, the same phenomenon can be obtained. In addition, the peak acceleration and the spectrum characteristic of input ground motion have great inlfuence on the earthquake response of the underground structure, the seismic response of underground structure showed obvious spatial effect.

• 单位
  中国地震局地球物理研究所; 北京