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  Time-dependent Analysis of Macro-synthetic FRC Sections with Bar Reinforcement

  Macro-synthetic fibre reinforcement has recently been proposed as reinforcement in several tunnels involving segmental linings internationally. However, concerns have been raised about the long-term performance of macro-synthetic fibres in respect of creep and the associated consequences for crack width development with time under sustained flexural loads. To address these concerns, a method to determine the effects of creep and shrinkage on the time-dependent behaviour of cracked, macro-synthetic fibre reinforced concrete cross-sections containing conventional bar reinforcement subjected to a sustained bending moment and axial force is presented. The analysis is implemented in a spreadsheet and is illustrated by several examples.

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