Civil Engineering Departmental Seminar - Next-generation reinforced concrete: Brittle behaviour and Fracture Mechanics assessment

10:30am - 11:30am
Room 3574 (Lift 27/28), Civil Engineering Conference Room, HKUST

Next-generation reinforced concrete: Brittle behaviour and Fracture Mechanics assessment

The present seminar intends to outline the most recent advancements on high-performance concrete structures, with particular focus on the complex phenomena characterising the failure mechanisms of fibre-reinforced, hybrid-reinforced, and FRP-bar reinforced concrete structures. These next-generation brittle-matrix composites can represent an effective solution to the main drawbacks related to conventional reinforced concrete in terms of durability and structural performances.

With regard to fibre-reinforced and hybrid-reinforced concrete structures, by means of the Updated Bridged Crack Model (UBCM) we can address the lack of knowledge about their bearing capacity, which is mainly influenced by fibre volume fraction and bar-reinforcement percentage coupled with their characteristic structural size. This dominant scale effect appears to be crucial to thoroughly understand fibre-reinforced or hybrid-reinforced concrete structural behaviour under flexural loading or low-cycle fatigue.

Furthermore, a correct understanding of the structural effects due to reinforcement, slenderness, and scale in the design of FRP-bar RC structures can lead to an effective development of innovative standard guidelines. In this context, the transition between tensile cracking and compression crushing failures occurring in FRP-bar RC beams is described by means of the Cohesive/Overlapping Crack Model (COCM). Finally, it is highlighted how the structural ductility, which is represented by the plastic rotation capacity of the composite beam, only occurs for high-strength concrete matrix and when the internal reinforcement can slip.

Event Format
Speakers / Performers:
Prof. Federico Accornero
Department of Civil Engineering and Smart Cities, Shantou University (China)

Federico ACCORNERO received his PhD in Structural Engineering from the Politecnico di Torino (Italy) in 2014. Before that, he studied at the Politecnico di Torino and at the Ecole Nationale des Ponts et Chaussées in Paris (France). Currently, Federico ACCORNERO is Associate Professor of Structural Mechanics at the Department of Civil Engineering and Smart Cities, Shantou University (China).

Federico ACCORNERO was appointed as a Member of the Commission WP 2.4.1 “Modelling of Fibre-reinforced Concrete Structures”, FIB-International Federation for Structural Concrete (2022-present), a Member of the Editorial Board of “Journal of Intelligent Construction”, Tsinghua University Press (2023-present), a Member of the Editorial Board of “Smart Construction and Sustainable Cities”, Springer (2023-present). He is author of 75 publications, of which 40 are papers appeared in Refereed International Journals (Google-Scholar H-Index=16, 782 Citations; Scopus H-Index=15, 675 Citations), on the following research topics: fracture mechanics, scale effects, reinforced concrete, masonry arch bridges, structural monitoring, acoustic emissions, membranes and shells, instability phenomena and hysteresis.

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Department of Civil & Environmental Engineering
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