skip to main content
Language:
Search Limited to: Search Limited to: Resource type Show Results with: Show Results with: Search type Index

Assessment of steel-fiber-reinforced segmental lining of Chamshir water conveyance tunnel, Iran: Integrating laboratory experiments, field observations, and numerical analysis

Case Studies in Construction Materials, 2024-07, Vol.20, p.e03144, Article e03144 [Peer Reviewed Journal]

2024 The Authors ;ISSN: 2214-5095 ;EISSN: 2214-5095 ;DOI: 10.1016/j.cscm.2024.e03144

Full text available

Citations Cited by
  • Title:
    Assessment of steel-fiber-reinforced segmental lining of Chamshir water conveyance tunnel, Iran: Integrating laboratory experiments, field observations, and numerical analysis
  • Author: Ezazi, Mohammad ; Hossaini, Mohammad Farouq ; Sheikhmali, Rasoul ; Khosrotash, Mohammad ; Sharifi Teshnizi, Ebrahim ; O’Kelly, Brendan C.
  • Subjects: Concrete damage ; Finite element analysis ; Reinforced concrete ; Segmented lining ; Steel fibers
  • Is Part Of: Case Studies in Construction Materials, 2024-07, Vol.20, p.e03144, Article e03144
  • Description: The conventional rebar-reinforced concrete (RRC) segmented lining of the Chamshir water conveyance tunnel (CWCT) in Bushehr Province, Iran, has experienced significant damage issues. This paper presents a comprehensive study involving laboratory experiments, numerical simulations and statistical site-survey analysis aimed at evaluating the mechanical behaviors and structural integrity of steel fiber-reinforced concrete (FRC) and fiber-rebar-reinforced concrete (FRRC) segment types, as compared to the traditional RRC segments. Laboratory compressive, tensile and flexural strength testing provided insights into the impacts of the fiber diameter and content on the ultimate strength capacities of the FRC test specimens. Numerical simulations scrutinized beam and segment models reinforced by the explicit inclusion of traditional rebar and/or randomly orientated and evenly distributed steel fiber reinforcements. The segment simulations were directed at investigating concentrated loading, representative of the jack thrust force applied in installing the segments during the tunnel boring machine (TBM) installation phase. Additionally, a field-monitoring program of the CWCT lining quantified common damage patterns among 545 RRC and 416 FRC segments that had experienced damage during their installation and in-service phases. For FRC beams, increased fiber content correlated with enhanced strength capacity, although the use of larger diameter fibers produced diminishing returns. Compared to the considerable damage expected near the applied TBM jack thrust force for the RRC segments, significantly reduced damage was predicted for both the FRC and FRRC segment types. However, even modest jack force misalignment (of 5–7.5°) led to cracking damage across the segment width for all models, although with the fibers included, the chipping damage was reduced substantially. The findings underscore the potential of FRC and FRRC segment types to achieve better structural integrity compared to traditional RRC segments.
  • Publisher: Elsevier Ltd
  • Language: English
  • Identifier: ISSN: 2214-5095
    EISSN: 2214-5095
    DOI: 10.1016/j.cscm.2024.e03144
  • Source: DOAJ Directory of Open Access Journals
    ROAD: Directory of Open Access Scholarly Resources
Back to results list
INSPIRE LIBRARY - TON DUC THANG UNIVERSITY (84-028) 37 755 057 Feedback
19 Nguyen Huu Tho St. Dist.7, HCM thuvien@tdtu.edu.vn

Copyright © 2017 INSPIRE LIBRARY - TON DUC THANG UNIVERSITY

Searching Remote Databases, Please Wait