建筑结构学报2011，Vol.32Issue(1)：63-69,7.
纤维对GFRP筋与自密实混凝土基体粘结性能影响分析
Effect of fibers on bond behavior between GFRP bars and self-compacting concrete
摘要
Abstract
Based on the experiment of 18 pull-out samples, the influence of different types of fibers (macro steel fibers, macro PP-fibers and micro PP-fibers) on the bond behavior between GFRP bars and matrix was analyzed.In order to improve the bond behavior, a new method of using the equivalent bending strength and deformation energy to evaluate the bond toughness was proposed according to the flexural toughness measured by DBV and RILEM.The test results show that when adding suitable hybrid of steel fiber and macro PP-fiber or macro fiber into concrete, it can both enhance the bond strength by 13％ ～35％ compared with NC matrix, and improve the bond toughness; the ultimate bond stress of CFRP bars is enhanced with increasing of steel fiber content.Finally, based on experimental results, the ascending branch of the bond-slip model is established, and the suggested model corresponds well with the testing curves.关键词
纤维混凝上/GFRP筋/静力试验/粘结强度/粘结韧性分类
建筑与水利引用本文复制引用
丁一宁,李娟,王宝民,宁喜亮..纤维对GFRP筋与自密实混凝土基体粘结性能影响分析[J].建筑结构学报,2011,32(1):63-69,7.基金项目
国家自然科学基金项目(50578026). （50578026）
