Numerical simulation and comparative design of non-planar interlocking fibre reinforced concrete bricks for tunnel lining structure under impact loading

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Tunnelling and Underground Space Technology Pub Date : 2024-11-08 DOI:10.1016/j.tust.2024.106184

Wenzheng Xu , Heyang Wu , Xiaoshan Lin , Yi Min Xie

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Abstract

In this study, the impact behaviour of tunnel lining structures constructed using a novel topological interlocking system with steel fibre reinforced concrete (SFRC) bricks is comprehensively investigated. A sophisticated finite element model is firstly developed to simulate the impact tests on the interlocking SFRC tunnel specimens. The model considers the geometric details of the main components of the test setup, including drop hammer, guide columns, interlocking tunnel specimen, rubber cover, and frames. Furthermore, a newly developed SFRC constitutive model is employed in the present model to accurately capture the dynamic behaviour of SFRC. By comparing the predicted results with experimental data, the developed numerical model has been demonstrated to be highly accurate. Six new non-planar topological interlocking bricks are then developed based on different patterns, and a parametric study is carried out to investigate the effect of geometric parameters on the dynamic response of the topological interlocking SFRC tunnel structures. Finally, recommendations for designing topological interlocking SFRC tunnel segments are provided based on the findings from this study.

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冲击荷载下用于隧道衬砌结构的非平面互锁纤维加固混凝土砖的数值模拟和比较设计

本研究全面探讨了使用新型拓扑互锁系统和钢纤维增强混凝土（SFRC）砖建造的隧道衬砌结构的冲击行为。首先开发了一个复杂的有限元模型，用于模拟互锁 SFRC 隧道试件的冲击试验。该模型考虑了试验装置主要组件的几何细节，包括落锤、导柱、互锁隧道试件、橡胶罩和框架。此外，本模型还采用了新开发的 SFRC 构成模型，以准确捕捉 SFRC 的动态行为。通过将预测结果与实验数据进行比较，证明所开发的数值模型具有很高的准确性。然后，根据不同的图案开发了六种新的非平面拓扑互锁砖，并进行了参数研究，以探讨几何参数对拓扑互锁 SFRC 隧道结构动态响应的影响。最后，根据研究结果提出了设计拓扑互锁 SFRC 隧道段的建议。

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来源期刊

Tunnelling and Underground Space Technology 工程技术-工程：土木

CiteScore

11.90

自引率

18.80%

发文量

454

审稿时长

10.8 months

期刊介绍： Tunnelling and Underground Space Technology is an international journal which publishes authoritative articles encompassing the development of innovative uses of underground space and the results of high quality research into improved, more cost-effective techniques for the planning, geo-investigation, design, construction, operation and maintenance of underground and earth-sheltered structures. The journal provides an effective vehicle for the improved worldwide exchange of information on developments in underground technology - and the experience gained from its use - and is strongly committed to publishing papers on the interdisciplinary aspects of creating, planning, and regulating underground space.