scholarly journals Self‐compacting high‐performance fiber concrete for foundations: Part 1 ‐experimental verification and design considerations

2021 ◽  
Author(s):  
Joost Walraven ◽  
Didier Droogné ◽  
Steffen Grünewald ◽  
Luc Taerwe ◽  
Bogdan Cotovanu ◽  
...  
Keyword(s):  
Experimental Verification ◽  
High Performance ◽  
Design Considerations ◽  
Fiber Concrete ◽  
High Performance Fiber

Fostering a Cast-in-Place Steel-UHPFRC Connector for Ductile Timber-Concrete Composite Structures: Parametric Study of the Shear Behaviour and Design Considerations

2019 ◽  
Author(s):  
Nicolas Naud ◽  
Luca Sorelli ◽  
Alexander A Salenikovich ◽  
Samuel Cuerrier-Auclair
Keyword(s):  
Composite Structures ◽  
High Performance ◽  
Fiber Reinforced Concrete ◽  
Shear Behaviour ◽  
Structural Failure ◽  
Design Considerations ◽  
Winkler Model ◽  
Connection System ◽  
High Performance Fiber ◽  
Strength And Ductility

Timber-concrete composite (TCC) structures provide a breakthrough solution for multi-storey buildings. Besides the importance of the connection stiffness, recent research has focused on ductile connectors. This work aims at developing an economic new cast-in-place connector to guarantee the suitable stiffness and structural ductility. A new composite connector has been developed by combining an Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) shell with an embedded inner steel rod. The former governs the connection stiffness, while the latter governs the connection strength and ductility. In order to realize a cast-in-place construction method, a wide experimental investigation on the connection shear behaviour with different geometry was carried out. Secondly, the results were analysed by Winkler model which allowed to define a simplified formula. Finally, a design example of the ductile connectors is presented with emphasis on the importance of a smart design of the connection system for avoiding a brittle structural failure.

scholarly journals Self‐compacting high performance fiber concrete for foundations: Part 2—Fiber orientation and distribution

2022 ◽  
Author(s):  
Steffen Grünewald ◽  
Bogdan Cotovanu ◽  
John Rovers ◽  
Joost C. Walraven ◽  
Luc Taerwe
Keyword(s):  
Fiber Orientation ◽  
High Performance ◽  
Fiber Concrete ◽  
High Performance Fiber

Effects of Thickness of Ultra High-Performance Fiber Concrete Wrapping on the Torsional Strength of Reinforced Concrete Beam

2015 ◽  
Vol 802 ◽  
pp. 161-165
Author(s):  
Thaer Jasim Mohammed ◽  
Badorul Hisham Abu Bakar ◽  
Norazura Muhamad Bunnori
Keyword(s):  
Thin Layer ◽  
High Performance ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Transverse Reinforcement ◽  
Rc Beams ◽  
Torsional Strength ◽  
Control Beam ◽  
Fiber Concrete ◽  
High Performance Fiber

Abstract: Two groups of rectangular beams, comprising of six specimens, the first group (L) were provided with four longitudinal bars, one at each corner while the second groups of beams (S) were fully reinforced with longitudinal bars and transverse reinforcement. Each group consisted of three beams. Two beams have been strengthened with ultra high performance fiber concrete (UHPFC) on four sides having a thickness of (15mm - 25mm) and one control beam. The variables considered in the experimental study include the transverse reinforcement ratios and the effect of thickness of UHPFC wrap. Experimental results show the effectiveness of the proposed technique at ultimate torque for strengthening beams and behavioral curves. Strengthened RC beams fully wrapped with a thin layer of UHPFC exhibit an enhanced torsional strength when compared to control beam. Results reveal that the transverse reinforcement ratios by 0.66%, increases the UHPFC contribution to torsional strength of strengthened beams with a 15 thick UHPFC; and by up to 7% for strengthened beams with a 25 thick UHPFC, respectively when compared to same strengthened beams without stirrup. It is found that the ultimate torque of beams with a 25 mm thin layer UHPFC is greater than beams with 15 mm by (28% and 28.3%) for the groups L and S, respectively.

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