Behaviour of cast-iron tunnel segmental joint from the 3D FE analyses and development of a new bolt-spring model
Behaviour of cast-iron tunnel segmental joint from the 3D FE analyses and development of a new bolt-spring model
复制标题
DOI：
10.1016/j.tust.2013.12.012
复制
发表时间：
2014-03-01
影响因子：
6.9
通讯作者：
Tsuno, Kiwamu
中科院分区：
文献类型：
--
作者：
Li, Zili;Soga, Kenichi;Tsuno, Kiwamu
采用三维有限元方法研究了伦敦地下隧道中使用的铸铁隧道管片的受力性能。建立了螺栓、壁板和法兰等铸铁节段节点结构细节的数值模型，并通过一组足尺试验对其性能进行了验证。利用验证后的模型，在旋转和剪切载荷条件下，分析了填缝槽和螺栓预紧力等结构特征对结构性能的影响。由于锚杆的这种详细建模增加了对足尺管片隧道进行分析时的计算时间，因此建议将锚杆模型替换为一组弹簧模型。提出了考虑螺栓几何特性和材料特性的螺栓-弹簧模型参数。结合螺栓-弹簧和实体分段模型的性能与更传统的壳-弹簧模型进行了比较。(C)2014爱思唯尔有限公司。保留所有权利。
The behaviour of cast-iron tunnel segments used in London Underground tunnels was investigated using the 3-D finite element (FE) method. A numerical model of the structural details of cast-iron segmental joints such as bolts, panel and flanges was developed and its performance was validated against a set of full-scale tests. Using the verified model, the influence of structural features such as caulking groove and bolt pretension was examined for both rotational and shear loading conditions. Since such detailed modelling of bolts increases the computational time when a full scale segmental tunnel is analysed, it is proposed to replace the bolt model to a set of spring models. The parameters for the bolt-spring models, which consider the geometry and material properties of the bolt, are proposed. The performance of the combined bolt-spring and solid segmental models are evaluated against a more conventional shell-spring model. (C) 2014 Elsevier Ltd. All rights reserved.