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Title
Japanese: 
English:Experimental and Analytical Study of RC Beams with Combined Steel Mass Loss and Spalling 
Author
Japanese: Cabatit Kyle Didacus Victoria, 千々和 伸浩, Kunihiko Uno, Yutaka Tanaka, 山路 徹.  
English: Kyle Cabatit, Nobuhiro Chijiwa, Kunihiko Uno, Yutaka Tanaka, Toru Yamaji.  
Language English 
Journal/Book name
Japanese: 
English:IABSE Symposium Tokyo 2025 
Volume, Number, Page         pp. 3361-3369
Published date May 18, 2025 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English:IABSE Symposium: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches 
Conference site
Japanese: 
English:Tokyo 
Official URL https://www.iabse.org/Tokyo2025
 
DOI https://doi.org/10.2749/tokyo.2025.3361
Abstract The corrosion of reinforcing steel bars in concrete threatens the performance of reinforced concrete structures. This study investigates the structural performance of severely corroded RC beams, focusing on rebar section loss, bond loss, and concrete spalling. Seven beam specimens were constructed with varying corrosion levels using the impressed current method, and different cover levels using paper clay. Loading tests provided the mid-span deflection curves, while digital image correlation showed the crack patterns. Flexural capacity decreased with greater corrosion and cover loss, though a residual bond mechanism was observed at 50% cover loss due to partial steel- concrete contact. This mechanism diminished with higher mass losses as rebar lugs deteriorated. Beams with complete cover loss showed lower strength. Finite element analysis using COM3 was conducted on the experimental beams, and beams extracted from an actual wharf structure.

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