A comparison of the bond behavior of PBO-FRCM composites determined by double-lap and single-lap shear tests. (November 2015)

• Record Type: Journal Article
• Authors: Sneed, L.H.; D'Antino, T.; Carloni, C.; Pellegrino, C.
• Is Part Of: Cement & concrete composites. Volume 64(2015)
• Page Start: 37
• Page End: 48
• Publication Date: 2015-11
• Subjects: Bond -- Cementitious matrix -- Debonding -- Double-lap shear test -- FRCM composite -- Single-lap shear test; Composite-reinforced concrete -- Periodicals; Concrete -- Periodicals; Composite materials -- Periodicals; Composites de ciment -- Périodiques; Béton -- Périodiques; Composites -- Périodiques; Béton léger -- Périodiques; Cement composites; Composite materials; Composite-reinforced concrete; Concrete; Lightweight concrete; Periodicals; Electronic journals; 620.135
• DOI: 10.1016/j.cemconcomp.2015.07.007
• Languages: English
• ISSNs: 0958-9465

Abstract

Abstract: This paper presents the results of an investigation on the bond behavior and stress-transfer mechanism of polyparaphenylene benzobisoxazole (PBO) fiber-reinforced cementitious matrix (FRCM) composites bonded to a concrete substrate using double-lap and single-lap shear tests. Results of double-lap shear tests with different composite bonded lengths and widths are presented and compared with those from single-lap shear tests previously reported by the authors. The idealized load response developed from single-lap shear tests is found to characterize the response of the composite in double-lap shear tests, although with a few key differences. With the double-lap shear test, load redistribution among the composite strips influences the post-peak response if debonding does not occur equally in both strips. Values of the ultimate (peak) stress determined using double-lap shear tests are generally consistent with, although slightly lower than, those determined by single-lap shear tests when the bonded length is longer than the effective bond length.