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Effects of hybrid steel fiber reinforced composites on structural performance of segmental linings subjected to TBM jacks
Author(s) -
Jamshidi Avanaki Mohammad
Publication year - 2019
Publication title -
structural concrete
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.912
H-Index - 34
eISSN - 1751-7648
pISSN - 1464-4177
DOI - 10.1002/suco.201800322
Subject(s) - serviceability (structure) , structural engineering , cracking , materials science , reinforcement , fiber reinforced concrete , thrust , composite material , eccentricity (behavior) , fiber , durability , reinforced concrete , engineering , mechanical engineering , political science , law
In recent years, incorporating fibers as the main reinforcement in segmental lined tunnels has gained significant interest. Damage to segmental linings due to the thrust force of TBM jacks is one of the main problems that arises in the assembly phase, reducing serviceability and durability of tunnels. The aim of this paper is to experimentally and numerically investigate the effects of fiber size, content, and hybridization on the performance of steel fiber reinforced concrete (SFRC) tunnel segments under TBM jack forces compared to conventionally reinforced concrete (RC) segments. In this regard, different scenarios of segment support conditions and eccentricity of the applied TBM jack loads are investigated in a particular real tunnel. The results showed that under various configurations of segment support and load eccentricity, SFRC composites show better performance over RC in both SLS and ULS conditions under TBM jack loads in terms of cracking strength and damage propagation.