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Hybrid use of HPFRC in slab
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Orientador(es)
Resumo(s)
Punching shear reinforcement has already proved to be a reliable solution to improve the deformation capacity of flat slab – column connections subjected to seismic actions. Alternative approaches are becoming attractive with the development of materials such as High-Performance Fibre Reinforced Concrete (HPFRC) with better performance in tension and compression compared to conventional concrete. Motivated by the promising results obtained during an experimental campaign on hybrid HPFRC flat slabs under monotonic centred vertical loading, this paper investigates the possibility of using HPFRC to improve the behaviour of flat slabs under lateral loading (such as during earthquakes). Four reversed horizontal cyclic loading tests, under constant gravity loads, are presented. The flexural reinforcement ratio, the extent of HPFRC zone from the face of the column and the gravity load were the experimental variables considered. Results show that HPFRC can be a promising alternative to conventional punching shear reinforcement in slab column connections subjected to seismic actions, leading to increased deformation capacity. Furthermore, the results show that even a small extent of the HPFRC zone (up to 1.5 times from the face of the column) can lead to significant benefits in terms of seismic behaviour of slab – column connections, opening the possibility for an optimization of use of HPFRC.
Descrição
For their help in the laboratory, the authors also acknowledge Rafael Sanabria Díaz, Peyman Ghaderi and Bruno Moniz.
Publisher Copyright:
© Fédération Internationale du Béton – International Federation for Structural Concrete.
Palavras-chave
cyclic loading flat plate flat slab high performance fibre reinforced concrete HPFRC punching seismic loading shear slab – column connection Civil and Structural Engineering Building and Construction Materials Science (miscellaneous)
Contexto Educativo
Citação
Editora
fib. The International Federation for Structural Concrete