On April 26, 2024, the "Innovation Base of Earthquake Engineering Comprehensive Simulation" 124th and 125th "Lecture Room" was successfully held. Invited by Professor Jie Xu, School of Civil Engineering, Tianjin University, Professor Alberto Carpinteri and Professor Federico ACCORNERO, from Politecnico di Torino University, presented their special reports at Zhang Hanying Hall of Simulation Center, National Facility for Earthquake Engineering Simulation.
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Fig.1. Professor Jie Xu hosted the lecture |
Fig.2. Professor Alberto Carpinteri |
Fig.3. Professor Federico ACCORNERO |
Professor Jie Xu from the School of Civil Engineering, Tianjin University, hosted the reports and introduced Professor Alberto Carpinteri and Professor Federico ACCORNERO. In this lecture, Professor Alberto Carpinteri introduced recent research entitled "Scale effects on the ductile-to-brittle transition in plain and reinforced concrete structures", including but not limited to: (1) Brittle solids typically exhibit unstable structural behavior, manifested by a negative slope in the load-displacement softening response curve. However, in extremely brittle solids, crack propagation often occurs suddenly, leading to a sharp decrease in load-carrying capacity, resulting in a virtual positive slope in the load-displacement softening branch. (2) If the loading process of brittle solids is controlled by displacement, the curve becomes discontinuous, and the representative point drops onto the lower branch with a negative slope. In this scenario, both load and displacement must decrease to achieve controlled crack propagation. This phenomenon is known as "snap-back instability." (3) Based on the framework of Linear Elastic Fracture Mechanics, the classical Griffith instability of extremely brittle solids is manifested in the cusp catastrophe of the load-displacement softening response curve.
Subsequently, Professor Federico ACCORNERO introduced recent research entitled "Next-generation reinforced concrete: Brittle behaviour and Fracture Mechanics assessment", including but not limited to: (1) Highlighting the effectiveness of next-generation brittle-matrix composites in addressing durability and structural performance issues, and addressing the lack of knowledge regarding the bearing capacity of fibre-reinforced and hybrid-reinforced concrete structures using the Updated Bridged Crack Model (UBCM). (2) Emphasizing the importance of understanding dominant scale effects in fibre-reinforced or hybrid-reinforced concrete structural behavior under flexural loading or low-cycle fatigue. (3) Describing the structural effects of reinforcement, slenderness, and scale in the design of FRP-bar RC structures. (4) Explaining the transition between tensile cracking and compression crushing failures in FRP-bar RC beams using the Cohesive/Overlapping Crack Model (COCM). (5) Highlighting the importance of structural ductility, represented by the plastic rotation capacity of composite beams, which occurs in high-strength concrete matrices when internal reinforcement can slip.
After the presentations, Professor Alberto Carpinteri and Professor Federico ACCORNERO from Politecnico di Torino University, Professor Jie Xu from Tianjin University and participating students held a heated discussion on relevant issues. Professor Jie Xu presented Professor Alberto Carpinteri and Professor Federico ACCORNERO with a certificate and a group photo, respectively.
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Fig.4. Lecture by Professor Alberto Carpinteri |
Fig.5. Lecture by Professor Federico ACCORNERO |
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Fig.6. Question & answer session |
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Fig.7. Issuing of certificate |
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According to statistics, the lecture attracted 98 teachers and students from Tianjin University and other universities, containing 42 online participants. The effect of the lecture was remarkable. Teachers and students responded enthusiastically to the lecture and looked forward to bringing more wonderful lectures to the broad masses of teachers and students.
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Fig.8. Group photo of experts and students |
Fig.9. Composition of attendees |
Introduction to Professor Alberto Carpinteri:
Professor Carpinteri was a Visiting Scientist at Lehigh University, Pennsylvania, USA, and was appointed as a Fellow of several Academies and Professional Institutions, among which: the European Academy of Sciences, the International Academy of Engineering, the Turin Academy of Sciences, the American Society of Civil Engineers. He was the Head of the Engineering Division in the European Academy of Sciences.
Professor Carpinteri was the President of several Scientific Associations and Research Institutions: the International Congress on Fracture, ICF, the European Structural Integrity Society, ESIS, the International Association of Fracture Mechanics for Concrete and Concrete Structures, lA-FraMCoS, the Italian Group of Fracture, IGF, the National Research Institute of Metrology, INRIM.
Professor Carpinteri received numerous international Honours and Awards: the Robert L'Hermite Medal from RILEM, the Griffith Medal from ESIS, the Swedlow Memorial Lecture Award from ASTM, the Inaugural Paul Paris Gold Medal from ICF, the Doctorate Honoris Causa in Engineering from the Russian Academy of Sciences, the Frocht Award from SEM, the Honorary Professorship from Tianjin University, the Founding Fellowship from the Indian Structural Integrity Society, the “Pearl River” Professorship from Guangdong Province, Shantou University, the Giuliano Preparata Medal from the International Society for Condensed Matter Nuclear Science, and the George Irwin Medal from ASTM.
Introduction to Professor Federico ACCORNERO:
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 an Associate Professor of Structural Mechanics at the Department of Civil Engineering and Intelligent Construction, Shantou University (China).
Federico ACCORNERO was appointed as a Member of the National Commission for the Assessment of the Scientific Research Quality in Higher Education, Ministry of University and Research, Italy (2024), 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 received the Outstanding Talent Scholarship from Shantou University, China (2023).
Federico ACCORNERO is author of 77 publications, of which 42 are papers appeared in Refereed International Journals (Google-Scholar H-Index=16, 841 Citations; Scopus H-Index=15, 726 Citations), on the following research topics: fracture mechanics, scale effects, reinforced concrete, masonry arch bridges, structural monitoring and fracto-emissions, membranes and shells, instability phenomena and hysteresis.
(Corresponding: Zhuofan Wu)
