地下建筑双尺度玄武岩纤维增强混凝土盾构管片

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology Pub Date : 2025-01-17 DOI:10.1016/j.tust.2025.106383

Min Hou , Jiang Feng , Hougai Shi , Ruiyi Jiang , Hengyi Zhu , Hualin Fan

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引用次数: 0

摘要

本文通过将双尺度玄武岩纤维增强聚合物（BFRP）钢筋应用于混凝土盾构管段的宏观加固，发展了双尺度玄武岩纤维增强聚合物（BFRP）钢筋加固拱（BRRA）技术。将BFRP迷你棒掺入混凝土中作为微增强筋。制备了6种二标BRRAs，迷你棒的含量从0%、0.5%到1.5%不等。进行了全尺寸的弯曲实验，以揭示brra的力学性能。微棒含量越高，BFRP筋的利用率越高，BRRA的弹塑性变形时间越长，承载能力越高，延性越好。BFRP筋的长弹性变形和BFRP小筋的加固机理提高了BRRA的承载力和延性。

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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Two-scale basalt fibers reinforced concrete shield tunneling segments for underground constructions

In this paper, two-scale Basalt fibers reinforced polymer (BFRP) rebars reinforced arch (BRRA) technique was developed through applying BFRP rebars to macroscopically reinforce concrete shield tunneling segments (STSs). BFRP minibars were mixed into concrete as the micro reinforcements. Six two-scale BRRAs were prepared with content of minibars changing from 0%, 0.5% to 1.5%. Full-scale flexural experiments were performed to reveal the mechanical performances of the BRRAs. With higher minibar content, the utilization ratio of the BFRP rebars is much greater and the BRRA has longer elastoplastic deformation, higher bearing capacity and better ductility. Long elastic deformation of BFRP rebars and reinforcing mechanism of BFRP minibars improve the bearing capacity and ductility of the BRRA.

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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.