Seismic Design Method for Shield Tunnels in Ground Conditions Subject to Change in the Longitudinal Direction

被引：0
|
作者：
Tsuno K. [1 ]
Fujita K. [1 ,2 ]
Funakoshi K. [1 ,2 ]
机构：
[1] Tunnel Engineering Laboratory, Structures Technology Division
来源：
Quarterly Report of RTRI (Railway Technical Research Institute) | 2023年 / 64卷 / 01期
关键词：
longitudinal direction; performance-based design method; seismic design; shield tunnel;
D O I：
10.2219/RTRIQR.64.1_27
中图分类号：
学科分类号：
摘要：
The authors of this paper investigated the effect of seismic motion on shield tunnels that are located in areas with varying ground conditions. This research revealed that the larger the inclination angle of a boundary between a basic layer and a soft layer becomes, the larger the sectional forces, such as axial force, bending moment and shear force become. In addition, the sectional force obtained by an equivalent stiffness beam model was found to be larger than that obtained by a beam-spring model. This research also confirmed that results using a beam-spring model when the inclination angle is 5.9 degrees satisfy verification requirements. © 2023 Ken-yusha Inc.. All rights reserved.
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页码：27 / 32
页数：5
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