Seismic response of shallow circular tunnels in two-layered ground

被引：40
|
作者：
Gomes, Rui Carrilho [1 ]
Gouveia, Fatima [1 ]
Torcato, Diogo [1 ]
Santos, Jaime [1 ]
机构：
[1] Univ Lisbon, CEris, ICIST, Inst Super Tecn, P-1699 Lisbon, Portugal
来源：
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING | 2015年 / 75卷
关键词：
Tunnels; Soil-lining interaction; Ovaling deformation; Seismic design of tunnels; Layered ground; BORED TUNNELS; LININGS;
D O I：
10.1016/j.soildyn.2015.03.012
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
The effect of ground stratification on the seismic response of circular tunnels is investigated, as most practice-oriented studies consider homogeneous ground. A finite element plain-strain model of a circular tunnel cross-section embedded in a two-layered ground is used to highlight the influence of stratification on the tunnel's seismic response. The layers interface was placed at the crown, centre and invert level. It is proved that ground stratification has an important role in the lining seismic forces. When the tunnel is fully embedded in one of the layers, the seismic lining forces may vary significantly in comparison with the single-layer case. If the tunnel intercepts both layers, maximum lining forces aggravation occurs when the lower layer is very stiff. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：37 / 43
页数：7
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