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.

Sneed, L., D'Antino, T., Carloni, C., Pellegrino, C. (2015). A comparison of the bond behavior of PBO-FRCM composites determined by double-lap and single-lap shear tests. CEMENT & CONCRETE COMPOSITES, 64, 37-48 [10.1016/j.cemconcomp.2015.07.007].

A comparison of the bond behavior of PBO-FRCM composites determined by double-lap and single-lap shear tests

CARLONI, CHRISTIAN;
2015

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.
2015
Sneed, L., D'Antino, T., Carloni, C., Pellegrino, C. (2015). A comparison of the bond behavior of PBO-FRCM composites determined by double-lap and single-lap shear tests. CEMENT & CONCRETE COMPOSITES, 64, 37-48 [10.1016/j.cemconcomp.2015.07.007].
Sneed, L.H; D'Antino, T.; Carloni, C.; Pellegrino, C.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/555885
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