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List of products by author: E. S. Bernard
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Effect of Creep on Bursting Resistance of Plain and Fibre Reinforced Concrete
Abstract: Resistance to ram thrust pressure in pre-cast concrete tunnel segments is an important consideration in the design of both the concrete mix and reinforcement comprising tunnel segments. Duration of loading is known to affect the apparent strength of concrete in compression, flexure, and direct tension, but its effect on bursting resistance is poorly understood. The capacity of plain and fibre...
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Effect of Exposure on Post-crack Performance of FRC for Tunnel Segments
Abstract: Fibre Reinforced Concrete (FRC) intended for tunnel segments is subject to many requirements during production, handling, installation, and service. Fibres are typically incorporated into this material in order to provide post-crack performance should stresses exceed the flexural-tensile capacity of the concrete matrix. The characteristic post-crack performance for a particular mix will change...
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Enhancing the Ductility of Fibre Reinforced Concrete for Tunnel Lining s
Abstract: Recent work has shown that hoop thrust in a tunnel lining is potentially useful for enhancing the ductility of fibre reinforced concrete sections in bending. Tests have demonstrated that under the action of an axial compressive stress, an FRC section that ordinarily displays strain-softening behaviour in pure bending can exhibit a form of ‘structural’ deflection-hardening behaviour [1]. This is...
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The Use of Macro-synthetic FRS for Safe Underground Hard Rock Support
Abstract: Numerous changes in technology and procedures have progressively been implemented over recent years with the objective of reducing hazards in underground excavations and enhancing long-term performance. Among the most significant in terms of improved safety during construction has been the introduction of Fibre Reinforced Shotcrete (FRS) using remotely operated equipment as this has...
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Time-dependent Analysis of Macro-synthetic FRC Sections with Bar Reinforcement
Abstract: 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...
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