Three-dimensional numerical study of the reactive powder concrete segments in tunnel lining

IF 1.1 Q4 MECHANICS

Curved and Layered Structures Pub Date : 2022-01-01 DOI:10.1515/cls-2022-0022

Hajer Satih Abbas, Maadh Imad Salman Al-Rubaye, Sarra’a Dhiya’a Jaafer, Bassam farman bassam, Abdelmajeed Alkasassbeh

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引用次数: 1

Abstract

Abstract The tunnel lining systems act as lines of defence against the forces and geotechnical situations. The use of precast concrete tunnel linings (PCTLs) has been escalating due to its effective and economical installation process. The tunnels usually suffer from the premature deterioration due to corrosion of the reinforcement and thus need maintenance. Corrosion leads to the distress in PCTL leading to the cracking and finally the scaling of concrete. This study aims to assess the structural durability performance of reactive powder concrete (RPC) as the material of tunnel lining segments compared to reinforced concrete (RC) and high performance concrete (HPC). The numerical findings indicated that the maximum load capacity of PRC-PCTL segments was greater than that of the corresponding RC and HPC segments. Regarding the findings, PRC is a very significant option for conventional segments. The high strength of PRC can decrease the thickness of the PCTL segments, resulting in the decreased material cost. Also, PRC-PCTL segments can eliminate the laborious and costly production of RC segments and mitigate the corrosion damage and thus enhance the service life of lining segments.

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隧道衬砌中活性粉末混凝土管片的三维数值研究

摘要隧道衬砌系统是抵抗力和岩土工程情况的防线。预制混凝土隧道衬砌（PCTL）由于其有效且经济的安装工艺，其使用一直在增加。隧道通常由于钢筋的腐蚀而过早退化，因此需要维护。腐蚀导致PCTL受损，导致混凝土开裂，最终结垢。本研究旨在评估作为隧道衬砌管片材料的活性粉末混凝土（RPC）与钢筋混凝土（RC）和高性能混凝土（HPC）的结构耐久性性能。数值结果表明，PRC-PCTL节段的最大承载能力大于相应的RC和HPC节段。就研究结果而言，PRC是传统细分市场的一个非常重要的选择。PRC的高强度可以减少PCTL段的厚度，从而降低材料成本。此外，PRC-PCTL管片可以消除RC管片的费力和昂贵的生产，减轻腐蚀损伤，从而提高衬砌管片的使用寿命。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Curved and Layered Structures MECHANICS-

CiteScore

2.60

自引率

13.30%

发文量

审稿时长

14 weeks

期刊介绍： The aim of Curved and Layered Structures is to become a premier source of knowledge and a worldwide-recognized platform of research and knowledge exchange for scientists of different disciplinary origins and backgrounds (e.g., civil, mechanical, marine, aerospace engineers and architects). The journal publishes research papers from a broad range of topics and approaches including structural mechanics, computational mechanics, engineering structures, architectural design, wind engineering, aerospace engineering, naval engineering, structural stability, structural dynamics, structural stability/reliability, experimental modeling and smart structures. Therefore, the Journal accepts both theoretical and applied contributions in all subfields of structural mechanics as long as they contribute in a broad sense to the core theme.