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随着我国经济的高速发展,地铁的规模及数量也日趋增加。地下结构一直被认为具有良好的抗震性能,然而5.12汶川大地震后,地下结构出现了或多或少的破坏,使人们对地下结构的抗震安全性及必要性得到重视。研究表明,地下结构具有不同于地面结构的抗震性能和破坏特征,在某些情形下,同样会发生严重甚至强于地面结构的破坏。
With the rapid economic development in our country, the size and number of the MTRC have also been on the increase. The underground structure has been considered as a good seismic performance. However, after the 5.12 Wenchuan earthquake, more or less damage to the underground structure occurred, which made people pay more attention to the seismic safety and necessity of the underground structure. Research shows that underground structures have different seismic performance and damage characteristics than ground structures, and in some cases, serious or even worse damage to ground structures will occur.