TENSION STIFFENING EFFECT OF REINFORCED HIGHPERFORMANCE FIBER-REINFORCED CEMENTITIOUS COMPOSITES

Author(s): W.L. Nguyen, G.G. Jen, W. Trono, D.M. Moreno, S.L. Billington and C.P. Ostertag
Book Title: Seventh International RILEM Conference on High Performance Fiber Reinforced Cement Composites (HPFRCC7)
Editor: H.W. Reinhardt, G.J. Parra-Montesinos, H. Garrecht
ISBN: 978-2-35158-145-2
e-ISBN: 978-2-35158-146-9
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 417-424
Total Pages: 8
Language: English

Abstract: While the tension stiffening influence of high-performance fiber-reinforced cementitious composites (HPFRCCs) in conjunction with conventional reinforcement has been investigated up to strains of 0.5%, the interaction between the HPFRCC and the steel reinforcement up to fracture of the reinforcement remains largely unknown. Therefore, limited information is available to guide potential designers with regard to overall ductility capacity in situations of high displacement demands, such as seismic excitation. Following an experimental series of fiber-reinforced concrete tension stiffening tests, the overall composite ductility and fiber-reinforced concrete cracking/strain development indicated significant loss in reinforcing bar fracture ductility. Additional testing has been carried out to investigate the role of reinforcing ratio, nominally the area of conventional reinforcing bar to gross composite area, on the ductility capacity at large strains. Such testing is indicative of an unanticipated inverse relationship between fiber-reinforced cementitious capacity and overall composite ductility based upon splitting crack suppression and reinforcing bar strain localization. The ramifications of this ductility loss are expected to be important to the adaptation of high-performance fiber-reinforced cementitious composites to a multitude of structural elements that may be exposed to strain values beyond 0.5% strains.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00