Simulated seismic response analysis of subway tunnels under complex geological conditions of obliquely incident seismic SV waves
Simulated seismic response analysis of subway tunnels under complex geological conditions of obliquely incident seismic SV waves
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斜入射SV波复杂地质条件下地铁隧道地震反应模拟分析
DOI：
10.1007/s12517-021-07376-w
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发表时间：
2021-05
影响因子：
--
通讯作者：
Shuqian Duan
中科院分区：
文献类型：
--
作者：
Xinjun Gao;Penghui Duan;Shuqian Duan
为了研究模拟地铁隧道在地震斜向入射的复杂地质条件下的抗震性能，提出了一种新的三维空间任意入射角SV波的斜入射输入方法。该方法依赖于显式有限元方法和粘性弹簧人工边界条件，同时考虑了土-结构相互作用、周围土体特性和地震波入射特性。根据地震波理论对其进行了应用和验证。在此基础上，建立了地铁隧道与土基的整体数值模型，系统分析了软、硬互层土中地铁隧道在SV波斜向入射下的动力响应。仿真结果表明，随着入射SV波角的增大，地铁隧道内各点的动力响应减小。研究还发现，在相同入射角下，软硬夹层场地的动力反应明显高于场地的其他部位，表明该地区的抗震能力较弱。此外，随着软、硬土体模值的接近，隧道结构中各点的动力响应趋于接近。通过增加衬砌结构厚度，减小软硬夹层场地的位移和弯矩，从而提高隧道的抗震性能。参数分析结果表明，这些因素对隧道结构在地震作用下的地震反应有较大影响，在复杂地质条件下的地铁隧道抗震设计中应予以考虑。
To investigate the seismic performance of simulated subway tunnels under complex geological conditions of obliquely incident earthquake excitations, a new input method for oblique incidence of SV waves with arbitrary incident angles in 3D space has been proposed. The method relies on explicit finite element method (EFEM) and viscous-spring artificial boundary (VSAB) condition, which simultaneously considers soil-structure interaction, surrounding soil characteristics, and seismic wave incident characteristics. It is applied and verified based on the seismic wave theory. The overall numerical model of subway tunnel and soil foundation is then established, and the dynamic response of subway tunnel in soft and hard interbedded soils under oblique incidence of SV waves is systematically analyzed. The obtained simulated results indicate that the dynamic response of each point in subway tunnel is decreased by increasing incident SV wave angle. It is also found that the dynamic responses of the site interbedded by soft and hard soils are significantly higher than that in other points of the site at the same incident angle, indicating that the mentioned zone has weak seismic resistance. In addition, the dynamic response of each point in tunnel structure tends to become closer when the bulk moduli of soft and hard soils are getting close. The displacement and moment of the site interbedded by soft and hard soils are reduced by increasing the thickness of lining structure, therefore improving the seismic resistance of the tunnel. The results of parametric study show that these factors could have significant influences on the seismic responses of tunnel structures during earthquake and should be considered during earthquake-resistant design of subway tunnels under complex geological conditions.
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影响因子：
7.4
作者：
S. Sharma;W. Judd
通讯作者：
S. Sharma;W. Judd
影响因子：
5.3
作者：
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DOI：
--
发表时间：
1997
期刊：
--
影响因子：
--
作者：
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Takahiro Sigaki;Kazuhiko Kiyohara;Yoichi Sono;Daisuke Kinosita;T. Masao;C. Yoshimura;T. Ugata
影响因子：
6.9
作者：
Wang, WL;Wang, TT;Huang, TH
通讯作者：
Huang, TH
DOI：
10.1142/s0219455420400131
发表时间：
2020-06
影响因子：
3.6
作者：
Xin-jun Gao;Peng Duan;H. Qian
通讯作者：
Xin-jun Gao;Peng Duan;H. Qian