Investigating the flexural resistance of fiber reinforced cementitious composites under biaxial condition. (April 2015)

• Record Type: Journal Article
• Authors: Kim, Jihwan; Kim, Dong Joo; Park, Seung Hun; Zi, Goangseup
• Is Part Of: Composite structures. Volume 122(2015)
• Page Start: 198
• Page End: 208
• Publication Date: 2015-04
• Subjects: Biaxial flexural resistance -- Biaxial flexure test -- Biaxial stress condition -- Fiber reinforced cementitious composites -- Energy absorption capacity -- Bending behavior; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2014.11.055
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: The flexural resistance of fiber reinforced cementitious composites (FRCCs) under biaxial condition was investigated by using two different types of biaxial bending test methods: the biaxial flexural test (BFT) and the centrally loaded round panel test (RPT). The flexural responses of FRCCs under biaxial condition were then compared with those of FRCCs under uniaxial condition; i.e. four-points bending test (4PBT). The test results, including the equivalent biaxial strength and normalized energy absorption capacity of the RPT, were found to be clearly higher than those of the BFT, and completely different cracking behavior was observed between the two biaxial test methods; the BFT generated numerous randomly distributed micro-cracks at the bottom of specimens, whereas the RPT mostly showed three major cracks, with minor radial cracks around them. In addition, the equivalent flexural tensile strength and normalized energy absorption capacity of the FRCCs under biaxial condition were found to be higher than those under uniaxial condition. The energy absorption capacity and the ratio of flexural tensile strength to the direct tensile strength of FRCCs are dependent on the stress state.