Matrix-fiber bond behavior in PBO FRCM composites: A fracture mechanics approach

被引：203

作者：

D'Antino, T. ^{[1
]}

Carloni, C. ^{[2
]}

Sneed, L. H. ^{[3
]}

Pellegrino, C. ^{[1
]}

机构：

[1] Univ Padua, I-35131 Padua, Italy

[2] Univ Hartford, Hartford, CT 06117 USA

[3] Missouri S&T, Rolla, MO 65409 USA

来源：

ENGINEERING FRACTURE MECHANICS | 2014年 / 117卷

关键词：

Bond; Cementitious matrix; Concrete; FRCM composite; Mode-II; REINFORCED-CONCRETE; FRP REINFORCEMENT; SHEAR TESTS; RC BEAMS; INTERFACE; CONFINEMENT; SHEETS; MORTAR; JOINTS;

D O I：

10.1016/j.engfracmech.2014.01.011

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The results of single-lap shear tests, conducted on specimens with fiber reinforced cementitious matrix (FRCM) composite strips bonded to concrete blocks, are presented in this paper. The FRCM composite was comprised of polyparaphenylene benzobisoxazole (PBO) fibers and polymer-modified cement-based mortar. This study indicates that in PBO FRCM-concrete joints debonding mainly occurs at the matrix-fiber interface. Friction between fiber filaments and between fibers and matrix is observed after the debonding process initiates. The experimental data suggest that a width effect does not exist among the fiber bundles, and an effective bond length can be defined and is approximately 260 mm. Axial strain profiles along the bonded length are analyzed to investigate the stress-transfer mechanism at the matrix-fiber interface. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：94 / 111

页数：18

共 44 条

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