东南大学学报（英文版）2018，Vol.34Issue(2)：259-268,10.DOI:10.3969/j.issn.1003-7985.2018.02.016
可液化土层分布位置对地下结构地震反应的影响
Influence of the liquefied soil layer distribution on the seismic response of rectangular tunnel
摘要
Abstract
In order to obtain the seismic responses of the soil-rectangular tunnel structure, based on the PL-Finn constitutive model, four different conditions, namely, the liquefied soil around the rectangular tunnel, the liquefied soil below the rectangular tunnel, the liquefied soil on either side of the tunnel and the structure on non-liquefied soil, are compared. In accordance to the time at which a large deformation occurs, the possibility of destruction from hard to easy follows a descending order: the liquefied soil all around the structure, the liquefied soil on the bottom of the structure, and the liquefied soil on the two sides of the structure. The area of large deformation is mostly beneath the two arch angles of the tunnel floor. The soil on the two sides, especially close to the structure, is the hardest to liquefy and deform. The large deformation of soil caused by the liquefaction appears after the peak seismic value occurs. The higher the input seismic value is, the easier a large deformation can take place. With the same input of peak ground motion, the total displacement vector of the structure and differential displacement of the side-wall are in accordance with an order from large to small in the three situations: when the saturated sand is on two sides, all around the structure, and on the bottom of the structure.关键词
液化/地震反应/矩形隧道/PL-Finn模型/数值模拟Key words
liquefaction/seismic response/rectangular tunnel/PL-Finn constitutive model/numerical simulation分类
建筑与水利引用本文复制引用
刘春晓,陶连金,边金,冯锦华,张宇,代希彤,王兆卿..可液化土层分布位置对地下结构地震反应的影响[J].东南大学学报（英文版）,2018,34(2):259-268,10.基金项目
The National Natural Science Foundation of China ( No. 41572276) , the National Key Research and Development Program of China ( No. 2017YFC0805400) . （ No. 41572276）
