福州大学学报（自然科学版）2017，Vol.45Issue(2)：167-172,198,7.DOI:10.7631/issn.1000-2243.2017.02.0167
具有可恢复性的BFRP约束混合配筋混凝土轴压短柱力学性能研究
Study on axial compression behavior of hybrid reinforcement concrete stubs reinforced by BFRP with resilience
摘要
Abstract
Hybrid reinforced concrete-filled fiber reinforced polymer tubular columns were proposed so as to achieve the higher bearing capacity and smaller residual displacement simultaneously, improve the post-earthquake recoverability. Three design parameters, namely fiber rate, sectional dimension and mixed reinforcement ratio, are considered and thus 4 hybrid reinforced concrete-filled fiber rein-forced polymer tubular columns and 3 contrast columns were prepared and tested under uni-axial load. The results indicate that failure modes of the columns are strength failure. With the fiber rate and sec-tion dimension increasing, the columns show a remarkably decreasing trend in the bearing capacity and stiffness. However, the effect of hybrid reinforcement on the increase extent is limited. Meanwhile the members have the stable post-yield stiffness. The typical stress-strain curve consists of elastic stage, elastic-plastic stage and strengthening stage. The capacity suddenly drops after reaching the ultimate bearing capacity and declines steady when the specimen achieves the bearing capacity of unconstrained reinforced concrete column. Finally an empirical formula is proposed for calculation the capacity, and the analytical values from the formula agree well with experimental results.关键词
BFRP管/混合配筋/轴压短柱/可恢复性/二次刚度Key words
BFRP tube/hybrid reinforcement/axially loaded column/resilience/post-yield stiffness分类
建筑与水利引用本文复制引用
巫文君,姜绍飞,林泉..具有可恢复性的BFRP约束混合配筋混凝土轴压短柱力学性能研究[J].福州大学学报（自然科学版）,2017,45(2):167-172,198,7.基金项目
国家自然科学基金资助项目(51278127) （51278127）
国家"十二五"科技支撑计划资助项目(2015BAK14B02-06) （2015BAK14B02-06）
