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List of products by author: G. Tiberti
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An Experimental Study on the Behavior of Precast Tunnel Segments Reinforced by Macro-Synthetic Fibers during...
Abstract: The use of fiber reinforced concrete in tunnel linings, with or without conventional rebars, has increased in the two last decades, especially in segmental linings. The design process of segmental concrete linings in ground conditions generally refers to temporary loading conditions (demolding, storage, transportation, grouting process and TBM thrust jack phase) as well as to the final...
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Experimental investigation on the local splitting behavior under TBM hydraulic jacks
Abstract: The employment of Fiber Reinforced Concrete (FRC) in precast tunnel segments in combination or not with conventional rebars is rising in the two last decades [1]. Steel Fiber Reinforced Concrete (SFRC) is generally used, even though there is a growing interest in the scientific community on polypropylene (PP) fibers for use in structural applications. In fact, in the last decade, important...
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Local splitting and crushing behavior under TBM hydraulic jacks
Abstract: During the lining construction process, high concentrated thrust jack forces are introduced in the segments leading to both high compressive stresses under the thrust shoes that can provoke a concrete crushing and tensile transversal stresses; the latter can cause cracks and, eventually, a splitting failure. In order to investigate the main mechanisms involved during either splitting or...
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Optimized reinforcement for precast tunnel segments with macro-synthetic fibers
Abstract: The use of fiber reinforced concrete (FRC) in tunnel linings, with or without conventional rebars, has increased in the two last decades, especially in segmental linings. Nowadays there is a growing interest in the scientific community on macrosynthetic fibers for use in underground structures. Within this framework, the present study investigates the possibility of using macro-synthetic fiber...
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Precast tunnel segments reinforced by macro-synthetic fibers during TBM opera tions: an experimental and numerical study
Abstract: In the scientific community and among designers there is a growing interest on macro-synthetic fibers for use in underground structures, especially for precast tunnel segmental linings. Segment reinforcement is generally designed according to the design actions on tunnel segments, resulting from segment transportation, placing process and ground pressure in the final state. In particular,...
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Structural behavior of precast tunnel segments under TBM thrust actions
Abstract: Precast elements for tunnel linings are design by considering several loading conditions. Some of these loading configurations can be studied by means of simplified analytical approaches which enable to easily include the FRC resistant contribution according to the design rules proposed by fib Model Code. On the other hand, some mechanisms need to be studied by means of NLFEA in order to...
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